MLA 22-94 - State of Arizona Department of Mines and Mineral ...

....... ~ . . . . . . . # ................. ~ .....IMineral Land' AssessmentOpen File ieportl1994MINERAL APPRAISAL OF CORONADO' NATIONAL FOREST, PART 7Patagonia Mountains-Canelo Hills UnitCoehise and Santa Cruz Counties, ArizonaPatagonia Mountaim-Cauelo Hills UnitARIZONA,!U.S. DEPARTMENTOF THE INTERIORBUREAU OF MINES

ii:i:~,~ ,,i/~,,'~MINERAL APPRAISAL OF CORONADO NATIONAL FOREST,PART 7IIPATAGONIA MOUNTAINS-CANELO HILLS UNIT,COCHISE AND SANTA CRUZ COUNTIES, ARIZONAbyMark L. Chatmanwith a section on energy resources by John R. ThompsonIIMLA 22-941994IIIIntermountain Field Operations CenterDenver, ColoradoU.S. DEPARTMENT OF THE INTERIORBUREAU OF MINES

p0272 - 101REPORT DOCUMENTATION z. REPORT NO. 2_4. Title and Subtitle7. Author(s)PAGE , =lMineral appraisal of Coronado National Forest, part 7Patagonia Mountains Canelo Hills Unit, Cochise and Santa Cruz Counties, ArizonaMark L. Chatman9. Performing Organization Name and AddressU.S. Bureau of MinesIntermountain Field Operations Centg~r, R(-~source Evaluation BranchBox 25086Denver, CO 80225 008612. Sponsoring Organization Name and Address]15. Supplementary Notes16. Abstract (Limit: 200 words)3. Recipient's Accession No5. Report Date6.8. Performing Organization Rept. No]0. Proiect/Task/Work Unit No]]. Contract(C) or Grant(G) No(C)(G)]3. Type of Repot[ & Period CoveredThis report presents an economic mineral assessment and inventory of mines and prospects in theapproximately 176,000-acre Patagonia Mountains-Canelo Hills Unit of Coronado National Forest. Deposits or areasmost likely to experience future development are characterized in terms of their economics, based on data acquiredby the author from a variety of sources, and supplemented by USBM field data collected by other workers in 1990and 1991. Numerous mine maps, rock-chip sample assays, and detailed descriptions of mine and prospect sitesare in this report and appendixes.Heavy but sporadic mining, mainly between the 1850's and 1950's was nearly all confined to thePatagonia Mountains. High-grade sulfide veins, replacements, and skarn deposits accounted for most of theproduction, which included large quantities of zinc, lead, copper, and silver, and considerable quantities of gold.Small quantities of molybdenum, manganese, tungsten, and placer gold have been mined. Most of the traditionallymined metalliferous sites will not see future activity due to the low tonnages present and removal of most highgraderock. Possible future development areas include copper porphyries and breccia pipes; most are too deeplyburied for current development. Localities where similar deposits may be concealed are identified.17. Document Analysis a. Descriptorsb. Identifiers/Open-Ended Termsc, COSATI Field/Group18- Availability Statemen;14,19. Security Class (This Report)20. Security Class (This Page)21. No. of Pages22. PriceIIIIIIIIIII!Ii!IIISee ANSI--Z39.18)See Instructions on ReverseOPTIONAL FORM 272 (4-77)(Formerly NTIS-35)Department of Commercei

IIIIIIIPREFACEA January 1987 Interagency Agreement among the U.S. Bureau of Mines (USBM), U.S.Geological Survey, and the U.S. Dep. of Agriculture, Forest Service describes the purpose,authority, and program operations for forest-wide studies. The program is intended to assistthe Forest Service in incorporating mineral resource data into forest plans as specified by theNational Forest Management Act (1976) and Title 36, Chapter 2, Part 219, Code of FederalRegulations, and to augment the USBM's mineral resource data base so that it can analyzeand make available minerals information as required by the National Materials and MineralsPolicy, Research and Development Act (1980). This report is based upon availableinformation, extensive field investigations to verify or collect additional information, andcontacts with mine operators and prospectors active on lands administered by the CoronadoNational Forest.h: IIiJ JJtl]iiJJ;4!kiiiilL IIIIIThis open-file report summarizes the results of a USBM forest-widestudy. The report is preliminary and has not been edited or reviewed forconformity with the USBM editorial standards. This study wasconducted by personnel from the Intermountain Field Operations Center,P.O. Box 25086, Building 20, Denver Federal Center, Denver, CO80225-0086.

CONTENTSSUMMARY .............................................................................. 1!IX~ I RODUC TIOIX! ........................................................................... 2Geographic setting .................................................................. 2Me,hods of investigation .............................................................. 4Previous investigations ............................................................... 5Geologic and mineral setting and synopsis of mining history ..................................... 5Patagonia Mountains .......................................................... 5Canelo Hills ................................................................ 7Mining .................................................................... 7MII',~RAL DEPOSIT APPRAISAL ................................................................ 8Copper porphyry and breccia pipe deposits ................................................. 9Central Patagonia Mountains copper porphyry/breccia pipe and alteration area ................. 10Three R copper-porphyry deposit .......................................... 11Three R shear zone, /n-s/tu leaching and SX-EW copper recovery ................... I 2Ventura breccia pipe .................................................. 13Other breccia pipes ................................................... 14Ventura copper porphyry deposit .......................................... 14Previously mined fractures above/near the Ventura copper-porphyry deposit ............ 15Sunnyslde Mine/! hunder and Standard prospects molybdenum anomaly .............. I 6Conclusions about central Patagonia Mountains copper-porphyry/breccia pipe/alteration area ....................................................... 16R{;d Mountain hydrothermat alteration area .......................................... 17Red Mountain copper porphyry/breccia pipe deposit ............................. 17Metalliferous veining peripheral to the Red Mountain copper-porphyrydeposit ............................................................ 18Other sites of metallization in the northern and northeastern Patagonia Mountains .............. 18Meadow Valley ...................................................... 19Red Bank well and Jonson Camp .......................................... 20Kunde Mountain and the Sansimon Mine area ................................. 20Porphyry-related metallization in the southern Patagonia batholith .......................... 21Four Metals Hill (Red Hill) copper-porphyry deposit ............................. 21Molybdenum and tungsten content ................................. 22Economics .................................................. 22Future exploration ............................................. 23Copper porphyries in the southernmost Patagonia batholith .............................. 23Economics ......................................................... 25Future exploration .................................................... 25Washington Camp/Duquesne Camp: base-metal skarn deposits and copper-porphyryexploration targets .......................................................... 26Economics ......................................................... 26Future exploration .................................................... 27Manganese deposits ................................................................ 28Hardshell marne deposit ...................................................... 29Resources ......................................................... 30Economics of hypothetical mining of the Hardshell manto deposit ................... 30Silver recovery ............................................... 31Future trends ....................................................... 32Manganese deposits peripheral to Hardshell manto .................................... 33Hardshell Incline Mine ................................................. 33Resources and economics ........................................ 33Other manganese deposits .............................................. 34Manganese at the Mowry Mine area .............................................. 34Mowry Mine ........................................................ 34Bullwacker deposit ................................................... 35Beyerle pit and nearby workings .......................................... 36Isolated manganese sites ............................................... 36IIIIIIIIIIIIIIIIIII

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 661011121314~5]6I]]8192021222324252627CONIENTSILLUSTRATIONSFiguresconlin.contin.Central Patagonia Mountains copper porphyry/breccia pipe/alteration area with sample localities PA127-145,PA169-334, PA345. PA368 478 ....................................................... 64] hree R Mine plan and longitudinal sechon, 400. 600 levels and part of 700, 800, and 900 levels ..... in pocketThree R Mine, Colossus adi[, with sample localities PA382 421 ............................... 65West Side Mine, Gray adit, with sample localities PA368-376 .Prospect ir~ breccia pipe, central Patagonia Mountains. with sample localities PA211-223 ................ 67P'rospect m breccia pipe, central Patagonia Mountains, with sample localities PA455-463 ................ 68Part of Chief Mine which intersects a breccia pipe, with san'~ple localities PA171-188. Patagonia Mountains-Canelo Hills Unit ................................................................... 69Part ut European Mine group, with sample localities PA432-44"1, 443-452 .......................... 70Adit m uppermost Cox Gulch, with sample localities PA471-474 ................................. 71Sunnyslda Mine, Volcano shaft, with sample localities PA226-255 ................................ 72Part of the workings of Standard(?) and Thunder prospects, with sample localities PA264-271, 273-285 ..... 73Generalized cross section of the Red Mountain porphyry copper and breccia pipe resource, looking northeast,Patagonia Mountains-Canelo Hills Unit .................................................... 74Aztec Mine group, with sample localities PAl 17-126 ......................................... 75AdJt of Aztec Mine group, with sample localities PA124-126 .................................... 76Hidden prospects, with sample localities PA106-115 ......................................... 77Elevation Mine group and Christmas Gift Mine, with sample localities PA90-105 ...................... 78Mines and prospects in Meadow Valley, with sample localities PA70-89 ............................ 79Mines and prospects by Jensen Camp, wil:h sample localil:ies PA18-66 ............................. 80Workings of Frisco Fair claims and unnamed workings near Jensen Camp, with sample localitiesPA28-31, 36-48. 41-44, 48-54 ........................................................ 81Sansimon Mine and nearby prospects, with sample localities PA5-15 .............................. 82Four Metals Mine and nearby alteration areas, with sample localities PA542-563 ...................... 83Diagrammatic cross section of Four Metals Hill copper-porphyry deposit, with sample localitiesPA542-560 ...................................................................... 84Plan view of Four Metals Hill (Red Hill} copper-porphyry deposit and workings of the Four Metals Mine, withsample localities PA542-563 .......................................................... 85Four Metals Mine, 5400 level adit, with sample localities PA542-556 .............................. 86Benton Mine and Line Boy Mine. with sample {ocalities PA753-758 ............................... 87ivIIIIIIIIIIIIiIIIiII

!!CONTENTS--contin.ILLUSTRATIONS--contin.Figures2829Santo Nine Mine ................................................................... 88Part of Edna Mine group and nearby unnamed prospects, with sample localities PA708-718 .............. 89IIIIIIIIIIIII303132333435363738394O4142434445464748495051525354Mines and prospects at Washington Camp/Duquesne Camp, with sample localities PA719-752 ............ 90Bonanza Mine, plan view, with sample localities PA745-746 .................................... 91Longitudinal section of the Bonanza Mine, looking east ........................................ 92Happy Thought Mine, with sample localities PA737-744 ....................................... 93Hardshell manto and Hardshell Incline deposits, and nearby mines, with sample Iocatities PA335-344 ....... 94Hardshell Incline Mine, plan view ....................................................... 95Hardshell Incline Mine, cross section on the main inclined shaft (looking east) ........................ 96Bender Mine, surface and underground (Fernando tunnel), with sample localities PA343-344 .............. 97Mowry Mine, North (Old) Mowry Mine (Bullwacker deposits), and Beyerle pit ........................ 98Maps of the Mowry Mine ....................................................... in pocketProspect on manganiferous structures, with sample localities PA312-317 ........................... 99Part of Flux Mine workings (up to 1915 era), with sample localities PA140-141 ...................... 100World's Fair Mine, with sample localities PAl 43-145 .................................... in pocketAugusta Mine, with sample localities PA326-327 ........................................... 101Wieland and Buffalo groups, with sample localities PA146-168 ................................. 102Part of Humbolt Mine and nearby prospect, with sample localities PA289-293, 295-298, 301-305 ........ 103Mary Cane adit, with sample localities PA346-350 .......................................... 104King Mine and Buena Vista Mine vein, with sample localities PA642-707 .......................... 105Buena Vista Mine, lower and middle adits, with sample localities PA658-706 ................... in pocketBuena Vista Mine, upper adit, with sample localities PA646-657 ................................ 106Northern segment of Jackalo-Paymaster vein, and other metallized fractures in the Patagonia batholith, withsample localities PA515-529 .........................................................107Enterprise Mine, with sample localities PA521-526 .......................................... 108Southern segment of Jackalo-Paymaster vein, and other metallized structures in the Patagonia batholith, withsample localities PA564-601 .........................................................109Part of Jackalo Mine, with sample localities PA571-577 ...................................... 110Minnesota Mine, northern adit, with sample localities PA599-600 ............................... 111

5556575859606162636465CONTENTS -contin.ILLUSTRATIONSFigurescontin.Metallized fractures in Patagonia batholith and in Jurassic age intrusive rocks, with sample localitiesPA603 641 ................................................................... t12Bennett Mine, wdh sample localities PA638 640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I I 3O'Mara Mine and nearby prospects in the Patagonia batholith, with sample localities PA507 514 ......... 114Part of O'Mara Mine workings, in cross section, looking northeast, with sample localities PA507-510 ...... 115Metallized fractures m Precambrian and Jurassic rocks, with sample localities PA490 506 .............. 116Mines and prospects near Gray Camp, with sample localities PA346-367 ......................... I 17Part of Cox Gulch (lower) prospects, with sample localities PA362--367 .......................... 118Denver Mine and nearby prospects on veins in Precambrian-age rocks, with sample localities PA479 489 .... 1 I 9Isabella Mine, with sample localities PA606 607 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120Part of Shamrock Mine, with sample localities PA608-617 .................................... 121Panama adit, with sample localities PA196-208 ............................................ 122COMPOSITE EXPLANATIONS FOR ILLUSTRATIONSExplanation of symbols for report figures and plates,including: inset maps at various scales and 1:126,720-scale plates .............................................................. 123Explanation of symbols for report figures, including:features of detailed mine maps. both surface andunderground, at various scales (larger than 1:24,000) ................................. 125TABLESMine production .................................................................... 8Summary of vein deposits associated with carbonate rocks ..................................... 38viIIIIIIIIIIIIIIIIIIII

UNIT OF MEASURE ABBREVIATIONS USED IN THIS REPORTmIIIIIIIIacacre(s)cu yds or yd 3 cubic yard(s)odegree(s)$ dollar(s) (U.S.)ftfoot (feet)galgallon(s)gal/min or gpm gallons per minuteg/Igram(s) per liter> greater thanHPhorsepowerin.inch(es)< less thanI/galliter(s)/gallonItlong ton(s); 2,240 Ib (avoirdupois) per Itmimile(s)minminute(s)NPVnet present valueozounce(s), troyppbpart(s) per billionppmpart(s) per millionIbpound{s) (avoirdupois)Ib/ft 3pound(s) (avoirdupois) per cubic foot% percentRORrate of returnsq mi or mi 2 square mile(s)stshort ton(s); 2.,000 Ib (avoirdupois) per ststpdshort ton(s) per dayopt or oz/st troy ounce(s) per short ton% to ppmppm to %ppm to ppbppb to ppmCONVERSION FACTORSmultiply % by 10,000multiply ppm by 0.0001multiply ppm by 1,000multiply ppb by 0.001USE OF CHEMICAL SYMBOLS TO ABBREVIATE NAMES OF ELEMENTSSee pages C-1 and D-1 for specific abbreviations.Use in text with concentration amounts implies theelemental form of that material; e.g., 0.05% Curepresents five hundredths of a percent copper inelemental form, not as copper carbonate or oxide.vii

MINERAL APPRAISAL OF CORONADO NATIONAL FOREST, PART 7,PATAGONIA MOUNTAINS-CANELO HILLS UNIT,COCHISE AND SANTA CRUZ COUNTIES, ARIZONAbyMark L. Chatman 1, U.S. Bureau of MinesSUMMARYThis report presents an economic mineral assessment and inventory of mines andprospects in the approximately 176,000-acre Patagonia Mountains-Canelo Hills Unit ofCoronado National Forest, Cochise and Santa Cruz Counties, Arizona. Collection of field data,including locating and mapping of mine and prospect workings and sampling of mineralizedzones, was done under the direction of John R. Thompson in 1990 and 1991. The author,in 1994, used a variety of literature and other data sources, supplemented by the results ofMr. Thompson's field work, to perform an all-commodity mineral resource appraisal of theUnit, which is the focus of this report.Deposits or areas most likely to experience futuredevelopment are characterized in terms of their economics. This study is one part of a fifteen-part series of U.S.Bureau of Mines reports concerning mines and mineral deposits in CoronadoNational Forest, a series designed to assist Forest Service personnel in incorporation of mineralresource data into future land-use plans. Numerous mine maps, rock-chip sample assays, anddetailed descriptions of mine and prospect sites are in this report and its enclosed appendixes.Patagonia Mountains-Canelo Hills Unit was mined heavily but sporadically, mainlybetween the 1850's and 1950"s; nearly all the work was confined to the PatagoniaMountains. High-grade sulfide veins, replacements, and skarn deposits accounted for mostof the production, which included large quantities of zinc, lead, copper, and silver, andconsiderable quantities of gold. Small quantities of molybdenum, manganese, tungsten, andplacer gold have been mined. Modern mining economics dictate that most of the traditionallymined metalliferous sites will not see future activity due to the low tonnages present andremoval of most high-grade rock. The largest sites have already been reclaimed. Possiblefuture development areas include copper and byproduct molybdenum resources in severalporphyry and breccia pipe deposits; most are too deeply buried for current development.Localities where similar deposits may be concealed are identified. In-situ leaching of copperis modeled. Resources of manganese and aluminum are unlikely to be developed, as are goldplacers. Few data are available for rock products (mainly gravel). Gravel production was notquantified. Energy resources are not known to be present.1 Geologist, Resource Evaluation Branch, Intermountain Field Operations Center, Denver, CO.1

INTRODUCTIONThe following text focuses on sites and areas in the Unit at which future explorationand/or mineral development may occur. Targets of this projected activity were chosen by theauthor, based on the results of economic modeling, and taking into consideration availableliterature, assay data from USBM (U.S. Bureau of Mines) samples, market conditions,commodity prices, status of domestic production and reserves, foreign competition andsources. Additional detail on economic modeling, geology, and historical mining is in appendixA. Geochemical samples collected from mined and/or mineralized zones are described inappendix B. Assay results are in appendixes C and D; samples from this Unit carrya "PA"prefix. Maps of mines and prospects follow the bibliography section. Large mine maps arein the map pockets in the back of the report. Inset maps, expanded-scale maps that detailintensely mined areas, were prepared for reader convenience. Plate 1, located in a mappocket, affords a quick reference to the locations of the inset maps and the samplenumbers/mine sites contained on them.Geographic settingThe Patagonia Mountains-Canelo Hills Unit of Coronado National Forest totals about275sqmi(approximately 176,000 ac) (fig. 1). About 93% of the area is within Santa CruzCounty and the remainder is in Cochise County (pl. 1). USBM divided the PatagoniaMountains-Canelo Hills Unit from the adjoining Huachuca Mountains Unit for the purposes ofthis study only; the division line is Arizona Route 83 north of Parker Lake, Forest Roads 48and 196 south of Parker Lake, and a 1 1/4 mi-long line north from mile post 104 on theInternational boundary to Forest Road 196. All Forest surface south and west of thesedivision lines is considered to be in the Patagonia Mountains-Canelo Hills Unit (see pl. 1).Patagonia Mountains account for nearly two-thirds of the total study area acreage. Anorthwest-trending fault zone and scarp demarcate the Patagonia Mountains from the CaneloHills. Canelo Hills comprise the northernmost, easternmost, and southeasternmost parts ofthe area studied (pl. 1).Patagonia Mountains-Canelo Hills Unit is within the Basin and Range physiographicprovince. Elevations range from a maximum of 7,221 ft at Mount Washington, in thePatagonia Mountains, to a minimum of 3,880 ft near the Santa Cruz River. Local parts of thePatagonia Mountains have over 1,500 ft of topographic relief. Nearly all stream drainage isdirectly into the Santa Cruz River, or into Sonoita Creek, which flows into the Santa CruzRiver. Exceptions are the north-flowing drainages in the northern and northeastern parts ofthe Canelo Hills, which supply the Babocomari River, and eventually flow into the San PedroRiver. Major access routes are Arizona Highways 83 and 82. Patagonia, AZ, is the nearesttown, less than a mile from the National Forest boundary. Extensive secondary access routes,and physiographic features of interest are shown on pl. 1. The closest railroad access isIIIIIIIIIIIiIIIIIII

IIIIIIIIIIIIIIIII- - INTERSTATI" ' • HIGHWAY"--'~U.S. HIGHWAYSTALE HIGHWAYFOREST MANAGEIdENT UNITBOUNDARY•) MANAGEMENT UNITS--SEE CAPTIONMAP LOCATION0 25 miManagement Units:1.2.3.4.5.6.7.8.9.10.11.12.13.MNCONMTN5Hogoles PATAGONIA MEXICOIATNSBigbeaSo~tordPinaleno-Greasewood Mountains (USBM report MLA 8-93)Chiricahua-Pedregosa Mountains (USBM report MLA 12-93)Winchester Mountains (USBM report MLA 10-93}Peloncillo Mountains (USBM report MLA 18-93)Santa Catalina-Rincon Mountains (USBM report in press)Dragoon Mountains (USBM report MLA 30-93)Patagonia Mountains-Canelo Hills Unit (this report)Huachuca Mountains Unit (USBM report MLA 1-94)Galiuro Mountains (USBM report MLA 21-93}Santa Teresa Mountains (USBM report MLA 26-93)Whetstone Mountains {USBM report MLA 2-94)Santa Rita Mountains (USBM report in press}Atascosa-Pajarito-San Luis-Tumacacori Mountains (USBM report in press)Doughs-N-PELONCtLLO~FNSFigure 1 .--Location map, Patagonia Mountains-Canelo Hills Unit, and the rest of CoronadoNational Forest.3,Lo~

at Nogales, AZ, 7 mi west of the National Forest. About 21 mi of the Unit's southernboundary line are also part of the International boundary with Mexico. The mountain rangecontinues southward into Mexico for several mi, where it is known as Sierra de San Antonio(Graybeal, 1984, p. 187).Methods of investigationUSBMs field investigation of the Patagonia Mountains-Canelo Hills Unit was conductedwith 270 employee-days of effort in 1990 and 1991 under the direction of John R.Thompson. Mr. Thompson directed the field reconnaissance, selected sample localities, andmapped the mines and prospects (except those cited as taken from literature sources) thatare detailed in the illustrations section of this report, immediately following the bibliography.In all cases where USBM data included in this report are from private in-holdings, Mr.Thompson determined the location of USBM work relative to private land boundaries andacquired the permission of private landowners for temporary access to collect geologic dataand samples and map mines, and to publish data and conclusions.The yield of this field work is twofold: 1)a partial inventory of mines and prospectsin the Unit, which the author supplemented extensively with published literature and numerousother data sources; 2) collection of 762 rock-chip geochemical samples from mineralizedzones, upon which mineral resource assessments might be based. Most of the rock-chipsamples were collected inside mine or prospect workings in the historically mined zones, butsome samples are from outcrop localities and others are from mine dumps or tailings. Thespecific sampling methods employed are described in detail at the beginning of the "sampledescription" appendix (appendix B). All of the geochemical samples were comminuted andsubjected to batteries of inductively coupled plasma and neutron activation analyses forspecific elemental determinations. Specific elements determined in the samples, commerciallaboratories used, and detection limits are listed at the beginning of appendixes C and D.Subsequent to Mr. Thompson leaving the USBM, the author, beginning in early 1994,took data from the field study, supplemented it extensively with data from literature and othersources, and prepared the all-commodities mineral resource assessment presented in thisreport. The USBM mine modeling and cost estimation system known as PREVAL was usedto obtain results for many of the deposit assessments in this report. Methodologies andparameters employed by PREVAL are documented in Smith (1992). Some depositassessments were derived with technologies afforded by the USBM CES (costs estimatingsystem), documented in U.S. Bureau of Mines staff (1987a) and U.S. Bureau of Mines staff(1987b), this in cases where commodities present or mining/milling methods employed in themodel are not addressed in PREVAL./4IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIPrevious investigationsExtensive literature is available concerning this Coronado National Forest Unit. Mostworks concerning the Patagonia Mountains address mineral deposits. Most Canelo Hillsliterature addresses stratigraphy and structure. Many of the works are cited in this text andappendixes at appropriate places. The enclosed bibliography lists numerous other publicationsthat deal with the Unit. The most comprehensive geologic mapping of the Unit is in Simons(1974) and Drewes (1980).Geologic and mineral setting and synopsis of mining historyPatagonia MountainsThe Patagonia Mountains contain nearly all the mines and prospects in the Unit, andaccount for all but a few hundred tons 2 of past mineral production. Geologic mapping, data,and interpretations from Simons (1974) and Drewes (1980) define the basic parameters ofthe ranges' geology and mineralization. The Patagonia batholith (name from Lehman, 1978),an early Tertiary-age, differentiated, granodiorite intrusive, dominates the exposed geology ofthe southern and central Patagonia Mountains and has been the mineralizing agent throughoutthe range (Graybeal, 1984, p. 187). A wide variety of mineral deposits has been formed dueto the intrusion of the Patagonia batholith and its reaction with previously emplaced rocks.These deposit types include copper-bearing porphyries and breccia pipes, with or withoutbyproduct molybdenum, base-and-precious metal skarn, siliceous base-and-precious metal veinand replacement zone of hydrothermal origin, vein-type hydrothermal alteration zone onfractures in volcanics (usually weakly metallized), and manganese-silver mantos and veins.The Patagonia batholith itself hosts a copper porphyry with byproduct molybdenum and somesiliceous base- and precious-metal vein deposits. Most of the deposits of the Patagonia range,however, are in rock units that have been intruded by and are underlain at depth by thePatagonia batholith. Descriptions of these other rock units follows (see fig. 2, following thebibliography section of this report).Granodiorite of the Patagonia batholith is flanked on the west by a near-equal surficialarea of middle Jurassic-age granitic rocks and Precambrian-age (800 m.y. to 1,600 m.y.)quartz monzonite and gabbro. This Jurassic/Precambrian complex contains metallized faults,shears, and veins, and has been subjected to hydrothermal alteration (Keith, 1975, p. 19-20).Mineral environments mapped by Keith and others (1983, map 18) categorize thismetallization as originating in early-Tertiary granodiorite (i.e., the Patagonia batholith). On theeast flank of the Patagonia Mountains and in the central Patagonia Mountains are a series ofTriassic- to Cretaceous-age volcanic rocks, some of which contain sedimentary xenoliths, and"Tons" in this usage refers to short tons (2,000 Ib).5

which contain a surmised collapsed caldera. These rocks host two copper-porphyry depositsand a copper-molybdenum breccia pipe in the central Patagonia Mountains, as well asnumerous base- and precious-metal veins, and the Hardshell manganese manto. Tworelatively small areas of Paleozoic sedimentary rocks on the far east side of the PatagoniaMountains (Washington Camp skarns and the Mowry Mine manganese replacement zone)have been metallized.f-he northern half of the Patagonia Mountains is underlain by extensive Cretaceous- toearly Tertiary-age, acidic, volcanic rocks and much smaller exposures of granitic intrusiverocks, including breccia pipes, of the same age. The volcanic rocks host metallized brecciapipe deposits and veins. Most importantly, they are intruded at depth by Laramidegraniticrocks (Simons, 1974, map), which are probably part of the Patagonia batholith, but may bea separate Laramide intrusion. The Laramide intrusive rock hosts at least one copperporphyry/breccia pipe deposit (Red Mountain), and alteration zones suggest that others mayex~s~ to the north and east.Several large hydrothermal alteration centers formed in the range around Laramidein[rusive centers. At least four of these hydrothermal alteration centers contain knowncopper-porphyry deposits; others may conceal copper-porphyry deposits at great depths(several thousand feet). All are responsible for metal zonation in the range and in veinsystems (Graybeal, 1984). Most evident of lateral metal distribution is widespreaddissemination of pyrite around the several hydrothermal alteration centers (fig. 2), although,alone, the pyritic zones do not delineate mineral deposits. Zonation of historically economicmetalliferous deposits follows a general concentric pattern outward from hydrothermalalteration centers, and often, vertically through vein systems within the hydrothermalalteration zones. Copper is anomalously high throughout, but tends to be more concentratedcloser to the hydrothermal alteration center. Molybdenum is even more centered. Lead andsilver migrate the greatest distances from the hydrothermal alteration centers. Manganeseand zinc tend to be deposited at intermediate distances.On a regional scale, the Patagonia Mountains are within a northwest lineation ofcopper-porphyry deposits (Schmitt, 1966, p. 20) that stretches from Cananea, in Mexico,northward through the Patagonia Mountains, through the Santa Rita Mountains, and to themajor copper-porphyry deposits that are being mined south of Tucson, AZ [ASARCO Inc.'sMission Complex; Cyprus Copper Co.'s Sierrita-Twin Buttes property (Phillips and Niemuth,1993, p. 2, 6-8)]. Paleogeologic studies and interpretations along this lineation suggestultimately that an upper mantle source exists for the metallization in the mountain range(Anderson, 1966, p. 11).IIIIIIIIIIIIIIIIIII

~,~ r ~i,i'ili;: ~ ~i i:i: ~IIIIIIIIIIIIIIIICanelo HillsCanelo Hills contain some of the same major series of rocks as the PatagoniaMountains. These rocks are exposed in three northwest-southeast trending belts (fig. 2).Along the northeastern perimeter of the Forest boundary are the same series of Paleozoicsedimentary rocks as found in the Patagonia Mountains at Washington Camp and the MowryMine, but these rocks are not known to be metallized in the Canelo Hills.Triassic- toCretaceous-age acidic volcanic rocks found along the east flank of Patagonia Mountains alsoare present in the southeastern Canelo Hills, and are exposed in a belt that parallels and liesmainly southwest of the sedimentary rock belt of Canelo Hills.Source of the volcanics islikely the Parker Canyon caldera and possibly the Turkey Canyon caldera of Lipman andHagstrum (1992} {see fig. 2).A belt of conglomerate/fault breccia reported by Schrader(1915, p. 240), occupies the fault zone and geographic boundary between Canelo Hills andPatagonia Mountains. No mapping of this belt was found in the literature. The southern 25%of Canelo Hills is covered by recent alluvial deposits, which most likely conceal volcanic rocks.Three areas of mineral development are known in the Canelo Hills. All are hosted involcanic rocks. Production has been negligible compared to the Patagonia Mountains. Oneof the three areas of mineral development in the Canelo Hills is the small lead-silver veinsystem in Meadow Valley at La Plata Mine and Hale #3 prospect (pl. 1). These are on theboundary between Patagonia Mountains and Canelo Hills and the metallization source is likelycentered somewhere to the west under the Patagonia Mountains.In the second area, a fewhundred st of manganese minerals were mined from very small faults in the southeasternCanelo Hills (pl. 1 ). The third area, known as the Parker Canyon workings, about which littleis known, are vein occurrences, probably very small, related to the Parker Canyon caldera {pl.1; fig. 2). The workings are described further in appendix A, p. A129.MiningPatagonia Mountains-Canelo Hills Unit has a long, but highly sporadic history of mining.Major mining periods occurred from the 1880's to 1920's, in the 1940's, and for a brief timein the 1950's. The earliest mining by U.S. interests was in 1855 at the Mowry Mine, and thelast was in the mid-1960's (at several sites). However, some mining does predate the 1853Gadsden Purchase, when this land was part of Mexico. Documentation of mine productionhas been inconsistent. Table 1 summarizes the known production, based largely on data fromKeith (1975).7ii, I

Table 1 .--Mine production, Patagonia Mountains-Canelo Hills Unit.Mining district Production Years of productionRcdrocklarsnawPalmettoPatagoniaComposite production20 st copper20 st lead2 st zinc 1880's to 1900's5,600 oz silver3,000 st copper72,000 st lead86,000 st zinc9,200,000 oz silver4,300 oz gold5,500 st copper225 st lead1 st zinc75,000 oz silver242 oz gold18,000 st copper22,000 st lead27,000 st zinc3,300,000 oz silver7,300 oz gold17,500(?) It manganese oreCopper 53.0 million IbLead 188.5 million IbZinc 226.0 million IbSilver 12.6 million ozGold 11,846 oz1870's to 19651880's to 19691600's to 1950'sComposite value $311.6 million --(1993 dollars)MINERAL DEPOSIT APPRAISALCopper porphyry and breccia pipe depositsCopper porphyry and breccia-pipe deposits of Laramide age occur at several localitiesin the Patagonia Mountains.Some contain molybdenum in byproduct-level concentrations.At other sites in the Patagonia Mountains and on the Canelo Hills-Patagonia Mountainsboundary, metallized structures, alteration zones, and geochemical metal anomalies suggestother possible deposits of these types.All are detailed below.Based on data available to the USBM, and mine and economic modeling, none of theproperties with estimated resources are economic to mine under early 1994 marketconditions. Main detriments are low grade and/or low tonnage for the shallower deposits, anddetrimental depth-to-deposit for the deeper deposits.These deposits and other favorableIIIIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIiigeological areas do have a high probability of future exploration or development, althoughmining of any of them in the immediate future is unlikely. Open-pit mining of copper-porphyrytype deposits has been the traditional method to economically recover ores from deposits inthe region. However, for very deep deposits like most of those in the Patagonia Mountains,which are at depths of 2,500 ft to 5,000 ft, other mining methods would have to beconsidered. Underground mining by block-caving can be utilized at great depths, but generallyrequires higher metal grades than those indicated in the Patagonia Mountains. A significantprice increase for copper would favorably affect the economics. Refinement of the in-situleaching process of copper recovery from sulfide minerals could provide another impetus todevelopment. A model applying the in-situ method to a Patagonia Mountains deposit isdescribed below under the 'Three R' deposit headings.Estimating a minimum size of copper porphyry that would have to be present to beeconomic under current market conditions involves many variables. Combinations ofmineralogy (oxide or sulfide ore), copper grade, and depth-to-deposit are involved, as are themining and mineral processing methods to be utilized. As various deposits, explorationtargets, potential exploration targets, and favorable geologic conditions in the PatagoniaMountains are discussed in sections that follow, it will be useful to remember some of theparameters of currently (1994) economic copper-porphyry deposits, detailed below.For the purposes of comparison, some tonnages and grades of deposits currently beingworked in the region are reported here. All are being mined by open-pit methods. CyprusCopper Co.'s Twin Buttes deposit 3, at last report, contained reserves of 39 million st with1.0% Cu and 11 million st with 0.73% Cu. Cyprus' Sierrita deposit 4 contains 526.6 millionst of 0.5% Cu with 0.033% Mo. That reserve estimate incorporates the Twin Buttesreserves, mentioned separately, above. The Esperanza deposit 5 of Cyprus contains 48.0million st of 0.27% Cu; notably, it was not listed among the active producing deposits inArizona in 1991. The Mission complex 6 of ASARCO, Inc., which includes three deposits (SanXavier South, Pima, and Mission) contains 584.0 million st of 0.67% Cu. (See Phillips andNiemuth, 1993, p. 22-23, 48-50.) A reserve citation dating from 1977 (Titley, 1982 p,. 402)subdivided the San Xavier South(?), Mission, and Pima deposits, and a Palo Verde depositfrom the Mission complex: San Xavier South(?) had a 166.9 million st reserve of 0.61% Cuin sulfide form and 1.05 million st of 1.48% Cu in oxide ore; 2.7 million st of ores had been3 In sec. 5, T. 18 S., R. 13 E., Pima County, AZ.4 In sec. 7, T. 18 S., R. 12 E., Pima County, AZ.5 In sec. 16, T. 18 S., R. 12 E., Pima County, AZ.8 In sec. 31, T. 16 S., R. 12 E., Pima County, AZ.9

produced previously. Mission had a 104.5 million st reserve of 0.73% Cuand 0.019% Mo;108.9 million st of ores had been mined previously. Pimahad 146 million st of 0.48%Cuand199.8 million st had been mined previously. PaloVerdehada 153.6 million st reserve brokendown into 125 million st of 0.61% Cu and 31.5 million st of 0.70% Cu; 0.47 million st hadbeen mined previously.Data about depths-to-deposit are more limited. Twin Buttes is buried under 300 ftto800 ft of alluvium (Barter and Kelly, 1982, p. 410). Both the Sierrita and Esperanza depositsare exposed at the surface; high-grade zones are no more than 500-ft-deep (West and Aiken,1982, p. 452). San Xavier North's supergene-enrichment zone is less than 100 ft below thesurface (King, 1982, p. 482).All the deposits mentioned in paragraphs above are mined by open-pit methods.Waste-to-ore ratios, throughout Arizona, are usually less than 2:1, though the range is fromabout 0.5:1 to nearly 4:1 (Phillips and Niemuth, 1993, p. 23).A characterization of grades and tonnages needed for currently (1994) economicmining of cupriferous ore bodies in the region by underground methods is afforded by the SanManuel land Kalamazoo 8deposits of Magma Copper Co., San ManueI, AZ. The San Manuelunderground ore body has a reserve of 216 million st of 0.6% to 0.7% Cu. Total cumulativepast production at the mine was not calculated for the purposes of this report. Productionin 1991 was 18.7 million st of ore (Phillips and Niemuth, 1993, p. 15, 50).To summarize the above data and to characterize a general economic target forcupriferous ore bodies in the Patagonia Mountains, a target deposit should exceed 200 millionst, with grades of 0.4% Cu to 0.7% Cu, but probably exceeding 0.5% Cu. The high end ofthe grade range (0.6% Cu to 0.7% Cu) would be the more likely target for an undergroundmine. Depth-to-deposit for an economic open-pit mine ranges from something less than 1,000ft to surface exposure.For the in-situ SX-EW production method, with the current low recoveries of sulfidemineral forms of copper (less than 50%; usually 30% or less in virgin ground), suitable depthsand tonnages cannot be accurately determined for the very deep deposits that typify thePatagonia Mountains.Central Patagonia Mountains copper porphyry~breccia pipe and alteration area (fiq. 3)Numerous pyritic zones are known in the Patagonia Mountains (see geologic map, fig.2); largest of these is the one surrounding the central Patagonia Mountains copper-porphyry' In sec. 34, T. 8 S., R. 16 E., Graham County, AZ.8 In sec. 9, T. 9 S., R. 16 E., Graham County, AZ.10IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIarea (fig. 3). The entire area is anomalously high in copper content. A hydrothermal alterationarea, characterized by mainly argillic and propylitic type alteration, is within the pyritic zoneperimeter (fig. 3). The low intensity with concentric form of this hydrothermal alteration areais a strong indication that still deeper, more intense, more cupriferoJs alteration zones exist.Both known copper porphyries of the central Patagonia Mountains area (Three R and Ventura;fig. 3) support this hypothesis; they are deep below the surface, at depths as much as 3,000ft.In both, copper content increases as the innermost, or potassic, alteration zone isapproached.Three R copper-porphyry depositThe Three R deposit is on a mineral patent that is currently (1994) under lease toASARCO, Inc.; the deposit center has been plotted on fig. 3 (see central part of fig. 3). It isknown to be a sulfide deposit (chalcopyrite and chalcocite), 3,000 ft below the surface (Long,1992, p. 4). No other data are available.A search for the source of intense shear-hosted copper-sulfide metallization at theThree R Mine and the source of the peripheral copper-sulfide vein deposits at the West SideMine and the Blue Rock claims (fig. 3-6) led to the copper-porphyry discovery.NorandaMines, Ltd. and ASARCO, Inc., were known to have done broad-area exploration work in thisarea, including drilling, in the 1960's and 1970's (S. R. Davis, USBM, oral commun., 1993).Even though some secondary copper (chalcocite) was reported in the deposit, it is doubtful,after studying the other known deep copper porphyries in the Patagonia Mountains, that anysignificant chalcocite blanket has formed. Mining would thus target mostly hypogene sulfideminerals. Probable host is a Laramide granodioritic or quartz monzonitic intrusion.While many details of this deposit are not known, it likely will be an area in whichmineral development work of some scale will occur. Since tonnage and grade are not knownby USBM, no detailed resource assessment can be made. The deposit can, however, be putin some context relative to the current state of copper mining in southeastern Arizona. At thisdepth, and at 1994 copper prices (about $0.90/Ib) it could not be mined by conventionalopen-pit methods. If it is a large tonnage deposit, in the range of 200 million st or larger, thesite may be held in reserve without further development, awaiting a significant increase incopper price or new technology development. While the per ton cost of open pit mining islow, the extensive development costs such as overburden stripping, require a substantialtonnage ore body at depth to make the effort profitable. Deposits that are several thousandft deep require a very large open pit perimeter, prohibitively costly to develop and maintainin mountainous terrain. The viability of underground mining methods at this site cannot becharacterized without knowledge of grade and tonnage.11

If the actual deposit size is small, in the range of a few tens of millions of st to 100mithon st, future in-situ /eaching may be considered. The current improbability of in situleaching of copper from sulfide deposits is based primarily on low recoveries.Currently (1994) in the U.S., small copper-porphyry deposits that were not ofeconomic interest a few years ago are being considered by small companies for developmentby/n-situ leaching. The in-situ mining process is conducted through a series of wells drilled,r~to the deposit. Injection wells, usually operating under the force of gravity alone, feed acidicsolutions into the plumbed deposit. Plumbing may be old mine workings at depth, or naturalpermeability of the rock. Multiple extraction wells, under negative pressure, recover the acidicsolutrons, which have been charged with leached copper from the deposit. Concentrations,n [he pregnant leach liquor of about 0.5 g Cu/I to 1 g Cu/I are needed for economic viability.The well pressures help prevent loss of acidic solution into the subterranean environment, andso may the natural boundary of the porphyry (the porphyry zone is heavily fractured; wallrocksmay not be).The economic advantage of in-situ leaching is connected to low capital investmentcosts and economies of the short-term mining of properties. Such operations, however, aremost successful with oxide ores, which are not known in the Three R copper-porphyrydeposit. Recoveries from in-situ leaching of copper sulfides are very low under presenttechnologies, in the range of 30% or less in ground that has been mined previously. Nomining has taken place in the Three R copper-porphyry deposit.Three R Mine shear zone, in-situ leaching and SX-EW copper recoveryThree R Mine (fig. 4-5) is a separate deposit from the Three R copper porphyrydiscussed above, although it is a geochemical expression of the copper-porphyry environmentunderlying it at depth. The metallized zone at Three R Mine is a wide, high-angle shear,composed primarily of supergene chalcocite. That enriched mineral zone has seen numerousunderground stope mining efforts since the early 1900"s, but there are no data to supportestimation of additional resource blocks that are contiguous enough or large enough to financefurther underground mining, regardless of historical grade. Details are in appendix A, p. A61 -A64).ln-situ leaching of rock remaining in the shear zone for copper is a possibly viable idea,and could be an impetus for further exploration at and near the site. Favorable is thedominance of chalcocite in the deposit, a more readily leachable form of copper sulfide thanthe primary sulfide chalcopyrite. A USBM model for in-sftu leaching of copper at the ThreeR Mine is based on recovery of 35% (7.8 million Ib Cu in all) of the copper from a contiguous,890,000 st block between the 400 and 800 levels of the mine. Old drifts would be used aspregnant leach solution collection sumps. Grade is high: 2% Cu in the shear to 1% Cu in the12IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIIwallrock, an approximate average grade of 1.25% Cu is used in the USBM model. Recoveryof the leached copper is modeled with the SX-EW method, through which the pregnant,though very low grade (1.0 g Cu/I) acid leach solution is reacted with a complex organiclixiviant through several stages. In these stages, the run-of-mine pregnant acid leach solutionis essentially stripped of copper, while the lixiviant is progressively upgraded in copper contentto make a solution of a concentration that is amenable to electrowinning.A high-puritycopper product can be formed through this low-cost method (Townsend and Severs, 1990;Arbiter and Fletcher, 1994). Successful operations using in-situ leaching of sulfide copperminerals have been set up in previously mined ground, taking advantage of the existing goodpermeability and large surface area. Some such properties have realized 50% recovery ofcopper, but that figure may be closer to an ideal thananorm. Economics of the USBM modelof leaching at the Three R Mine suggest the effort would be subeconomic, but within $1million to $1.5 million of the break-even point over the life of the operation (see details inappendix A, p. A63-A68).Historical descriptions of a fracture zone at the Blue Rock No. 8 claim (fig. 3)suggestthat the site has a fracture zone similar in size and possibly grade to the Three R deposit; ithas been excavated extensively.The fracture at Blue Rock No. 8 claim may also bedevelopable by in-situ leaching, but mapping must be completed to assess that option. TheWest Side Mine (fig. 6) is a northern extension of a fracture that parallels the main Three RMine shear (fig. 4).Available data suggest the West Side Mine is much less intenselymetallized than the Three R Mine main shear. More information on these sites is in appendixA, p. A61-A63.Ventura breccia pipe (fig. 3, southwest quadrant)NOT to be confused with the Ventura Mine, fig. 3 (southwest quadrant), which was not driven on the Ventura breccia pipe.This breccia pipe, which intrudes Mesozoic-age granitic and monzonitic rocks (Simons,1974, map), is exposed at the surface (AGDC, 1967, map) and extends to a depth of 2,600ft (Win. Lundby, former Noranda geologist, oral commun., 1993).characterize the deposit (Davis, 1977, p. 2) are the following.Other data whichDrilling the steeply-inclinedbreccia pipe led to resource assessments of 3.6 million st of average 0.402% Mo and 0.25%Cu. These tonnages were derived through a 32-hole drilling program by Noranda Mines, Ltd.,in 1965. Molybdenum content decreases with depth.A USBM model of hypothetical mining and economics of development of the Venturabreccia pipe deposit indicates the deposit would not be economical to mine under early 1994economic conditions with commodity prices of $0.90/Ib Cu and $3.35/Ib MoS2; it would have13

a NPV 9 of negat/ve $48.7 million at a 15% ROR ~°if mined by underground methods. It isunlikely that this breccia pipe deposit ever would be developed alone because of low tonnageand grade. Co-development with the Ventura copper-porphyry deposit, discussed below, maybe ~easible. More background on this breccia pipe is in appendix A, p. A137-A138.Other breccia pipes {fig. 3)Besides theVentura breccia pipe, ten other breccia pipes are shown on fig. 3. Fivehave sizeable diameters where exposed at the surface (several hundred ftto2,000-ft). Onlyfour have been sampled by USBM. Those in adit PA211-223 (fig. 7), PA455-463 (fig. 8), andPA171-188 (fig. 9; part of Chief Mine group) were sampled directly. The main part of theVentura Mine (fig. 3), which reportedly intersects a breccia pipe (Payne, 1977, map), wasflooded in 1994; it was not examined byUSBM. ArelatedaditoftheVentura Mine(PA464-466, fig. 3) intersects another breccia pipe. Only the dump was available for sampling there.A low cost reconnaissance sampling of the rest of these breccia pipes for copper andmolybdenum may discover important metal concentrations like those in the Ventura brecciapipe. Six of the samples from breccia pipe PA211-223 exceed 1% Cu concentration.Samples were not re-run to obtain a more precise representation of the copper content. Nodata concerning the vertical extent of that breccia pipe are available. Those conditionspreclude estimation of tonnage and grade of the breccia pipe.Ventura copper-porphyry deposit (fig. 3, southwest perimeter}NOT to be confused with the Ventura Mine (fig. 3, southwest quadrant) which does not overlie the copper-porphyry deposit.Data from Davis (1977, p. 6, 9, fig. 2, attachment C) were used as the basis for thisanalysis. Drilling in 1965 on the Ventura breccia pipe, discussed above, led to discovery ofincreasing chalcopyrite content at depth (fig. 3). Follow up drilling with 43 holes by NorandaMines, Ltd., from 1973 to 1976 delineated the peripheral, low-grade part of a deep copperporphyrydeposit.This copper-porphyry deposit is hosted in Jurassic-age granite which is overlain by anon-reactive monzonite. During metallization, the geologic contact between those two rockunits shunted copper solutions northeastward toward the surface. Other significant controlsto metallization are veins that strike east to northeast towards the Thunder prospect (PA273-285, fig. 3), and a strong south-dipping vein and fracture zone. These characteristics led todelineation of a permissive exploration target to the south (see fig. 3), where other resourcesmay eventually be delineated. Drilling completed by 1977 showed that both the chalcopyrite9 NPV is "Net present value".~o ROR is "rate of return".14IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIIIzone and the alteration zone expand with depth, so the deposit is open ended at depth, andcontains a currently delineated minimum of 200 million st. Its highest-grade zone occupiesa surface area about 1,700 ft by 2,400 ft (fig. 3).Significant copper metallization is 600 ft to 1,100 ft below the surface.Copperconcentrations are low grade, with mostly 0.3% to 0.4% Cu in the central part of the depositand mostly 0.2% Cu in the outer part of the deposit (see fig. 3). Most importantly, 0.3% Cumetallization continues to depths of 1,500 ft to 2,000 ft. The potassic alteration zone, whichusually contains the highest hypogene copper content in copper-porphyry deposits, was notreached by drilling up to 1977. Lead, zinc, silver, and gold, are present in amounts that wouldallow some smelter credits for these metals as byproducts, if the deposit were mined.Examination of Davis' (1977) data suggest it is likely that the main part of this deposit,as yet undelineated, may occur at depths as great as the Red Mountain deposit (3,000-ft to5,000-ft-deep). Economics dictate that the deposit will see no mining until the potassic zoneand co-existing high-grade copper zone are found. Early 1994 economic conditions dictatethat much higher grades of copper be present in order to mine the site by undergroundmethods. The property would represent a NPV of negative $455 million at 15% ROR, if anattempt was made to mine the average 0.3% Cu zone by underground methods. Details ofthe economic analysis are in appendix A (p. A139). The low recovery problems associatedwith in-situ leaching of copper-sulfide deposits are discussed on p. 10. The economics of in-situ leaching of the Ventura porphyry are further complicated by deep (several thousand ft)injection and recovery well requirements.Previously mined fractures above/near the Ventura copper-porphyry depositUsing the same reasoning applied to fracture zones above the Three R copper-porphyrydeposit, the three metallized fracture zones above/near the Ventura copper-porphyry depositare evaluated for in-situ leachable metal resources. These metallized fractures are: 1) theEuropean Mine group, PA430-454 (fig. 3, southwest quadrant, and fig. 10); 2) unnamedworkings in uppermost Cox Gulch, PA467-474 (fig. 3, southwest quadrant, and fig. 11 ); and3) the Zinc adit group, PA475-478 (fig. 3, southwest perimeter). Even though severalsamples contain copper concentrations in the range of 0.5% Cu to 1% Cu, none are viabletargets for leaching of copper minerals.Workings at the European Mine group (PA430-454) and workings in uppermost CoxGulch (PA467-474) are excavated on thin (less than 1.5-ft-wide, average), cupriferous, quartzveins. The structures are too narrow for consideration as leachable copper targets, and thepotential recovery from quartz vein material is small.15

There is insufficient structural data to assess the Zinc adit group of workings; assaysof samples identify anomalous lead (1% Pb) and zinc (over 2% Zn) 11 and high concentrationlevels of silver (nearly 3 ozAg/st, at the minimum). Copper content was far below 1% Cu.Even if a significantly large structure were shown to be present at this site through moredetailed field work, not enough copper is present to warrant attempts at leaching.Sunnyside Mine/Thunder and Standard prospects molybdenum anomaly (fig. 3, south-centralpart)A north-northeast trending area of anomalous molybdenum concentration wasdelineated between the general Sunnyside Mine area (PA224-255, fig. 3, 12) and theS[andard prospect (PA261-271, fig. 3, 13) and Thunder prospect (PA273-288, fig. 3, 13);available literature does not quantify the anomaly(AGDC, 1967, map). USBM samples andfield observations demonstrate that the area is also anomalous by its elevated concentrationof disseminated copper-sulfide minerals, particularly at the part of the Thunder prospect thatwas examined by USBM field crews (adit PA273-285, fig. 13).Presence of extensive,anomalously high concentrations of molybdenum and copper suggests that an inner part ofa copper-porphyry system (and thus higher hypogene copper grades) might be exposed or liecloser to the surface in this particular part of the central Patagonia Mountains copper-porphyry/breccia pipe/alteration area.Industry drilling for an economic-grade copper-porphyry deposit in this area has beenundertaken at several sites (fig. 3). Most of the drill sites are north, northwest, and south ofthe Standard and Thunder prospects and on the ridge that trends northeast from the southeastpart of the Sunnyside Mine. Available data do not indicate that any copper-porphyry depositswere discovered as a result of this drilling, but it is possible that unavailable industry data mayindicate otherwise.The Sunnyside Mine, Thunder prospect and Standard(?) prospect aredetailed further in appendix A, p. A35-A36.Conclusions about central Patagonia Mountains copper-porphyry/breccia pipe/alteration area (fig. 3)The Central Patagonia Mountains hydrothermal alteration area is the largest such areain the Patagonia Mountains-Canelo Hills Unit. It also contains most of the deposits of boththe copper-porphyry type and the breccia-pipe type.It probably contains the most totaltonnage of copper-porphyry type deposits, although there is uncertainty as to the actualtonnage of the Three R copper-porphyry deposit. Because of these characteristics, the centralPatagonia Mountains area will probably experience the most concentrated exploration and" Samples exceed upper laboratory detection limits for lead and zinc.16IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIpossible mineral development in future years of any part of Patagonia Mountains-Canelo HillsUnit.Viable exploration targets are those which might contain copper porphyries and related,deep, metallized breccia pipes in the size range of 10 million st to 300 + million st. At leasttwo have been found in the past 30 years. Complete data from industry exploration mayshow that other deposits of these types and sizes have been discovered previously. Minablezones that may be found in metallized breccia pipes that are separate from copper porphyries(those with known surface exposure, shown on fig. 3) are likely to be much smaller in sizethan the copper porphyries and deep breccia pipes (for example, a few million tons to a fewtens of millions of tons). The known, separate, exposed breccia pipes have relatively limitedphysical dimensions, which limits their tonnage.None of the deeply buried sites, either porphyry or breccia pipe, are likely to bedeveloped via open-pit mining methods because they are simply too deep. Unforeseen andheretofore unexperienced high copper prices could change that scenario, but such increaseis not considered likely. Improvement in recoveries from in-situ leaching of copper-sulfideminerals will be a key factor in sparking development of the Ventura copper porphyry.Currently (1994) achievable copper recoveries are too low to make the deposit economicallyviable, particularly with the great depth-to-deposit (2,500 ft to 5,000 ft). Costs of deepdrilling and establishment of injection and recovery well systems could not be recouped.Modeled leaching of copper from the Three R shear zone (p. 12-13) affords a look at thedifficult economics involved. Viability of the Three R copper porphyry cannot be estimateddue to lack of data concerning the site. Discovery of higher grades of molybdenum and/orcopper in the surficially exposed breccia pipes would be required to support their developmentby underground methods.Red Mountain hydrothermal alteration area {DI. 1)Red Mountain copper-porphyry/breccia pipe deposit (pl. 1, fig. 14)USBM data on the Red Mountain deposit are entirely from literature; no samples werecollected from the site during USBM work on the Coronado National Forest. Red Mountain(pl. 1) is an undeveloped Kerr-McGee Corp. prospect on a mineral patent.Red Mountain copper resource is in part a breccia pipe and in part a concentration ofhypogene copper that occurs as a true copper porphyry in the potassic alteration zone of theoverall hydrothermal system (fig. 14). The deposit was defined through widely-spaced deepdrill holes, some of which approach 5,000 ft in depth. There are no supergene forms ofcopper mineralization among the resource tonnage. Initially, resources were estimated at 100million st of primary copper sulfides (chalcopyrite) containing 0.71% copper (Cu) (Paydirt,17

1970; Phillips and Niemuth, 1993, p. 49). Currently, resources are estimated at 250 millionst with 0.72% Cu (Long, 1992, p. 5).This tonnage is probably best classified in themeasured subeconomic resource category. Red Mountain copper resource is distinctive byits deep location, about 3,500 ft below the present topographic surface (fig. 14), on theaverage (Corn, 1975, p. 1,437; Quinlan, 1986, p. 297), which dictates development byunderground mining methods under present economic conditions and technological limitations.Mining of the zones of disseminated, hypogene copper, and copper in the breccia pipe(fig. 14) via stopes, under 1994 market conditions and copper price would not be economic,representing an estimated NPV of negative $369 million at a 15% ROR. The major detrimentis depth to deposit. The deposit has a rather high grade, compared to other copper porphyrytype deposits, but economic viability of such deposits is linked very closely to the economyof open-pit mining. This economy is lost on a deposit as deep as Red Mountain. Additionaldetails of the deposit economics are provided in appendix A, p. A134-A135.Metalliferous veining peripheral to the Red Mountain copper-porphyry deposit (fig. 15-18)Within the extensive zone of disseminated pyrite that is above and surrounds the RedMountain copper porphyry/breccia pipe deposit (fig. 2), are three areas of metalliferous faultzones, some with veining. Nearly all are hosted in Laramide rhyolites, but a few are hostedin Laramide andesite.The metallization represents distal emanations from the largehydrothermal alteration area that developed at depth, and resulted in formation of the RedMountain deposit. Workings of the Aztec Mine group (fig. 15-16) and Hidden prospects (fig.17) are those in closest proximity to the Red Mountain deposit. Limited data availableconcerning those areas show the metallization to be very low grade. The few loci of elevatedcopper concentration are probably very limited in tonnage.Data concerning structures atChristmas Gift Mine and nearby prospects (fig. 18) are too sparse to quantify the silveranomalies encountered there. Considerably more structural data are available concerning theElevation Mine group (fig. 18). Copper and silver concentrations can be quite elevated at thesite (10% Cu; 30 oz Ag/st), but the host structure, a breccia and fault zone, is far too narrow(5-ft-wide, average) to consider mining under current (1994) market conditions. More detailsconcerning all of the sites on the Red Mountain periphery are compiled in appendix A, p. A21 -A24.Other sites of metallization in the northern and northeasternPatagonia Mountains (pl. 1, fig. 19-22)Three areas in the northern and northeastern Patagonia Mountains have been drilledin the search for buried, high-tonnage metal deposits, primarily those of the copper-porphyrytype. Results known to the USBM are either sparse or non-existent. Known data are18IIIIIIIIIIIIIIIIIII

III!II!II!II!IIII!!!!!negative, but not conclusively so, because the depths drilled are apparently shallow. Incontrast, previously identified copper-porphyry deposits outside of the Patagonia batholithitself (Three R, Ventura, Red Mountain) are all several thousand ft deep.Meadow Valley (fig. 19)The Meadow Valley area, which has been developed via the La Plata and MeadowValley mines, and the Hale, Hale #2, Hale #3, Homestake, and Sulphide prospects (pl. 1 ), ischaracterized by the following geological and chemical parameters. Fractures, serving asprobable conduits for hydrothermal alteration processes, are mineralized by very narrow quartzveins and quartz breccias. These became of economic interest solely because of supergeneenrichment and subsequent concentration of silver and lead in the oxidized zone, which doesnot extend to any great depth. Copper is everywhere geochemically anomalous, but inconcentrations usually below 1% Cu. The veins and other structures are far too narrow tobe of any economic interest.The more southern prospects suggest metal zonation in the area, as they have muchless silver and lead, and more copper and zinc. Thus, the southern workings are moreproximal to a mineralizing hydrothermal center than are the northern workings. The possibilityexists that this hydrothermal alteration center hosts a copper-porphyry deposit. Drilling bythe Anaconda Company took place in 1964, probably in the Meadow Valley flat (fig. 19).Copper concentrations were not encountered at depth but pyritization was. Outcrop of rockin the area is sparse; little alteration was observed in the rock that is exposed (C. E. Ellis,USBM, written commun., 1994).Additional data are needed for assessment, including actual depth that was drilled, anda surficial rock-geochemical profile of the area. Is copper distributed in the surface in placesawa.y from the metallized fractures and veins? If so, the paucity of copper at depth issignificant. If no copper anomaly highs exist at the surface away from the metallized veinsand other structures, then the paucity of copper in the depths penetrated by drilling (no morethan 1,000 ft), is irrelevant data. It has not been proven that deep enough drilling was done.It is likely that the completed drilling was far too shallow, by 1,000 ft or more. Finally, thedegree or type of hydrothermal alteration most pervasive in the area must be known. If it isno more intense than propylitic or argillic, then it is certain that any copper-porphyry typemetallization that might exist would be deeply buried below the Meadow Valley area. Thesecharacterizing data are not known by USBM. Available data, therefore, must still beconsidered permissively favorable for the existence of a copper-porphyry or cupriferousbreccia pipe deposit at depth, somewhere in or near Meadow Valley. Future exploration is apossibility.19

Red Bank well and Jensen Camp (fig. 20-21}This area was first noticed due to the supergene-enriched lead-silver segments of itsthin, zoned veins, and its geochemically anomalous level of copper. Zinc is found in the veinsat greater depths, below the lead and silver zones. There is no appreciable continuity to anyof these structures along strike {C. E. Ellis, USBM, written commun., 1994). Figure 21partially delineates a few of the structures. Modern prospecting focused onthe Red Bank wellarea (western part of fig. 20; probably the north-trending ridge containing sample PA22 andthe Durham claims), where an intrusive monzonite has higher concentrations of copper, lead,and zinc than does the surrounding volcanic rock. The Anaconda Co.'s geochemical,geophysical, and drilling exploration program of 1964 demonstrated that most metaldeposition is controlled in a northeast trend due to vein and breccia systems and the contactbetween monzonite and andesite. Literature indicates that zones of anomalous copper, lead,and zinc were delineated, but no further work was done (J. R. Thompson, USBM, writtencommun., 1993, paraphrasing AGDC document no. 8748.05, date not recorded byresearcher).These data support the possibility of a favorable environment for a metallized copperporphyrydeposit or cupriferous breccia-pipe deposit at depth, somewhere in or near the RedBank well ridge (fig. 20). The area could see renewed exploration interest in the future, aconclusion concurred with by Keith (1975, p. 24). The zonation of metals vertically throughthe veins is particularly supportive. Knowing the depth of drilling by Anaconda Co. would beparticularly useful in more fully assessing the exploration work done to date. The presenceof anomalous lead and silver in the area strongly indicates that metallization here is quite distalto any hydrothermal alteration center that may have induced formation of a copper-porphyryor cupriferous breccia pipe deposit. If a deposit exists, it would likely be at considerabledepth, possibly several thousand feet. This is consistent with other known copper-porphyryand cupriferous breccia-pipe deposits in the Patagonia Mountains (Red Mountain copperporphyrydeposit is an example).Kunde Mountain and the Sansimon Mine area (pl. 1, fig. 22)Another hydrothermal area that has been drilled for metal deposits is on and aroundKunde Mountain (pl. 1 ). Precise locations of the prospected area and drill sites are not knownby USBM. An alunitized zone was the main target of a Canadian company that conducteddrilling in 1980. No other data are known. This surficial, alunitic alteration, if evidence of acopper-porphyry deposit or cupriferous breccia pipe at depth, is likely representative of theless intense, outer alteration zones that typically surround such deposits (argillic or propylitic).A hydrothermal alteration center with coincident high copper concentrations would thus beexpected to be distal to Kunde Mountain. The host is a series of volcanic rocks of probable20IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIITertiary age. The only data available concerning metallization are from Sansimon Mine andrelated prospects, about 0.5 mi to the south (fig. 22). These contain primarily lead, zinc, andsilver, suggesting that metal distribution in this prospect area is quite distal to anyhydrothermal alteration center at depth. While it cannot be ruled out that this area may seefuture exploration interest for copper porphyry or cupriferous breccia pipe deposits, the areamust be considered less favorable than aforementioned areas at Red Bank well and MeadowValley. This lesser favorability is based on the apparently smaller areal extent affected byhydrothermal alteration at the Kunde Mountain-Sansimon area, and less wide-spreadmetallization, particularly with regard to pyrite.Porphyry-related metallization in the southern Patagonia batholithThe southern part of the Patagonia batholith is the most deeply eroded part of theintrusive body. It hosts one known copper-porphyry deposit, Four Metals Hill, which is thebest delineated of all the known porphyries in the Patagonia Mountains-Canelo Hills Unit, butalso, ironically, probably the smallest deposit of this type.Numerous alteration zones(unsampled) are in the southern Patagonia batholith (fig. 2), as are elevated molybdenumgeochemical anomalies and small molybdenum occurrences and deposits.The area haspossibilities for hosting other copper porphyry, some with recoverable molybdenum, but noparticularly favorable target areas can be delineated with the sparse available data.Four Metals Hill (Red Hill) copper-porphyry deposit (fig. 23-26)Four Metals Hill is a small, low grade copper porphyry (fig. 23-25), in whichchalcopyrite and large amounts of pyrite occur in disseminations and stockwork veinlets in aTertiary-age quartz monzonite breccia. This breccia may be an intrusion into, or an in-placebrecciation of Tertiary-age granodiorite that constitutes the bulk of the southern PatagoniaMountains.The shallow blanket of supergene enrichment at Four Metals Hill constitutes 5 millionst of 0.61% copper (AGDC, 1954?). Lacking additional data, these are classed by the USBMas inferred resources. The hypogene (primary) copper zone is slightly below and to the southof the supergene enrichment zone (fig. 24). The hypogene copper zone is the footwall partof the north-dipping quartz monzonite breccia which extends down the 45 ° dip slope for1,000 ft. The breccia has apparently been replaced in part by non-cupriferous alaskite,especially along the northern periphery of the deposit.It contains indicated and inferredresources totalling 8.6 million st of 0.47% copper. A separate, near vertical zone of hypogenecopper deposition is along the north perimeter of the breccia near the alaskite contact. Itsdimensions are not well quantified, but it appears to be small (60,000 st). It could be readilymined in conjunction with stripping of the overlying supergene enrichment zone, but is too21

small to be a solitary mining target. The grade estimate of the near-vertical hypogenezoneis confidential (Farnham, 1953, appendix).Molybdenum and tungsten content.--The southern periphery of the main, circularalteration zone of the Four Metals Hill deposit (fig. 23), has been observed to containabundant, oxidized molybdenum compounds, and a 5-ft-wide sericitized zone with irregularparticles and masses of an unidentified, brown tungsten mineral (Dale and others, 1960, p.122), which may be scheelite or huebnerite. Tungsten is often associated with acidic,intrusive rocks. An anomalous geochemical molybdenum high is present in the southern partof the Patagonia batholith (see discussion below). There are no data that suggest either metalis present in quantities that would elicit economic interest, though available data are sparse.Economics.--It should be noted that the most recent data used by USBM for thisanalysis are the coring study results from Noranda Mines, Ltd., circa mid-1960's. MetallicVentures, Inc.'s (Tucson, AZ) early 1990's plan to open-pit mine the deposit may well bebased on more recent, more favorable data. No such data were available to the USBM for thisanalysis.The deposit could be mined by either open-pit or underground (stoping) methods.Economic modeling with data available to USBM suggests neither method would be profitablewith the late 1993 copper price of $1.00/Ib. An open-pit development of the supergeneenrichment zone would be the least expensive mining method, but would result in high overalllosses (a negative $47 million NPV at a 15% ROR). The deposit is too small to pay forinfrastructure that would allow a high-tonnage mining rate, and too low in grade to supportmining over a period of a decade or more. Open-pit development of three parts of the deposit(the supergene enrichment zone; the upper 900 ft of the inclined hypogene deposit; and thesmall, near-vertical hypogene deposit) would result in even higher losses (-$76 million NPVat 15% ROR) due to the impact of lower-grade hypogene rock and a needed largerinfrastructure for deep open pit mining. Underground mining of the entire inclined part of thehypogene deposit (down to a depth of 1,000 ft) would incur losses similar to open pit mining(-$70 million NPV). Capital costs are less than for the deep open pit model, but per tonmining costs are much higher. More details are in appendix A, p. A88-A91.One consideration that could help the viability of the property, should open-pit miningbe attempted, would be to study heap leaching of the oxidized cap, because much of it wouldhave to be stripped during open-pit mining of the copper deposit, which is lower. Theoxidized cap overburden possibly could be leached after stripping, then used to backfill theopen pit. A study of the mineralogy of this rock would be essential prior to any attempt toheap leach it; little is known now. The amount of remaining sulfide in the rock would haveto be low. The grade of the leached cap was reported to be 0.15% copper (Cu) (AGDC,1954?).22IIIIIIIIIIIIIIIIIII

IIIIIIiIIIiIIIIIIFuture exploration.--The structural orientation of the Four Metals Hill copper porphyrysuggests it may be faulted on the footwall side of its inclined, hypogene copper zone. If so,the resources have been tectonically moved to their present position after deposition, andadditional resources may exist in a separate, concealed location. Emplacement of the rockmass containing the deposit via normal faulting would mean that any additional copperdeposition would be higher in elevation, and thus has been removed by erosion.emplacement via reverse faulting could allow the existence of a detached, possibly cupriferousroot at depth. Outcropping areas of alteration (Simon, 1974, map) known to the north andthe east of the Four Metals Hill deposit represent logical exploration targets for such adetached root, or for other, similar copper-porphyry deposits (fig. 23).Copper porphyries in the southernmost Patagonia batholith (pl. 1, fig. 27-29)A permissively favorable environment for copper porphyries with recoverablemolybdenum exists in the granodiorite and possibly the dioritic phases of the Patagoniabatholith that are between the south side of Sycamore Canyon and the Mexico border(metallization no doubt continues into Mexico, but data from there are lacking). On the U.S.side of the international boundary, this area includes about 13 mi 2 (pl. 1), all of which are inthe National Forest.mineralization come from several sources.Data which support the possibility for copper-porphyry typeKeith and others (1983, map 18) denote virtually all of the metallization areas in thispart of the Patagonia Mountains as indicative of a copper-porphyry environment that was inits depositional stages during the Cretaceous-Tertiary time boundary. A depiction of metalzonation in the Patagonia Mountains as a whole (Graybeal, 1984, p. 187, 189-190) detailsthe relative abundance of molybdenum 12 in this southern part of the Patagonia batholith incomparison to the northern part of the batholith. The molybdenum variance is explained bythe much deeper erosion of the Patagonia Mountains here, in comparison to the northern partof the Patagonia batholith, which is much narrower in outcrop (see geologic map, fig. 2) 13.Deeper erosion into rocks of a copper-porphyry environment reveals core deposition zones,including the main areas of copper and molybdenum deposition.ButVeining, lead-silverdeposition, and some zinc deposition will occur concentrically away from the copper- andmolybdenum-rich core zone. Deposits of these types probably have been eroded away fromthe southern part of the Patagonia batholith.12 Molybdenum is an important component of most copper-porphyry deposits. All of Arizona's molybdenum production (in1994) is a byproduct of mining copper-porphyry deposits.'= The northern part of the Patagonia batholith is not smaller than the southern part; it is just much less deeply eroded{Graybeal, 1984, p. 187).23

A reconnaissance in 1909 (Schrader and Hill, 1910, p. 160-161) first noted thepresence of sparse quantities of molybdenite, a molybdenum sulfide mineral (MoS2) at severallocalities in this area, including:1) the main sulfide-bearing quartz vein in the Ioweradit ofthe Buena Vista Mine (pl. 1); and 2) the [South] Belmont Mine (Washington Camp-Duquesnemining area, pl. 1). Also identified in the 1909 reconnaissance was that, ingeneral, graniticrocks of sec. 36, T. 23 S., R. 15 E., and W. 1/2 sec. 31, T. 23 S., R 16 E. have sparsemolybdenite pseudomorphs after pyrite and chalcopyrite. Other molybdenite was found atmine sites in the southernmost Patagonia Mountains: Benton Mine, and Line Boy Mine (fig.27), and later, at the SantoNino Mine (pl. 1, fig. 28). AIso, molybdenite was encountereda[ the Edna Mine group (fig. 29). These four sites are discussed below in more detail.The Santo Nino, Benton, and Line Boy mines all contain some indicators of porphyryenvironments. All are within the overall body of granodiorite of the Laramide-age Patagoniabatholith (Simons, 1974, map), which indicates a favorable age of deposition and a favorablelithology. At the Santo Nino, there has been brecciation and feldspathic alteration of countryrock to an aplite where metals were deposited (Kupfer, 1965, p. E15). These characteristicsrepresent favorable ground preparation and favorable mineral replacement. Santo Nino Minehas the only known molybdenum production of the southern Patagonia Mountains. Reportsof production tonnage vary considerably.One report is that about 20,000 st of copper-molybdenum ore was produced from the mine over the periods of 1918 to 1931 and 1942to 1943, averaging 7% to 8% copper and about 1% molybdenite (Kupfer, 1965 p. E14);another report totals just 200 st of molybdenite ores (Keith, 1975, p. 82) from the mine TM.The copper occurs as chalcopyrite, which is a favorable mineral form. Copper is much morewidely disseminated in the mine than molybdenum, although both metals are confined mostlyto a N.-S. joint set and a NE.-trending fracture set (Kupfer, 1965, p. E15-E16).confinement of metallization is not a favorable characteristic of a porphyry environmentmodel.Several structural, alteration, and metallization characteristics reported at the Line BoyMine (fig. 27) are favorable indicators of a porphyry environment.include:ThisThese characteristics1) presence of small breccia pipes; 2) presence of kaolinization, silicification,introduction of secondary mica, and feldspathic replacement; and 3) disseminated coppervalues. Low overall pyrite amount is an unfavorable characteristic. The overall alteration areaat Line Boy is about 150 ft in diameter (Brooke, 1965, p. 1, 2).At the Benton Mine,favorable characteristics of tithologic mix, order of intrusion, mineral form, and mineralconcentration were noted.Low-grade copper and gold metallization (as pyrite anda, Data in another mine report suggests that both numbers may be correct; the larger tonnage was mine production, andthe smaller tonnage may have been simply the later effort to recover molvbdenite from the Santo Nino Mine dump (Brooke, 1965,p. 2).24IIIIIIIIiIIIiIIIIII

ii, I ,IIIIIIIIIIiIIIIIchalcopyrite), along with minor molybdenite, occur in a granite porphyry that has intruded theoverall granodiorite of the Patagonia batholith; further, the metallized zone is wide (60-ft)(Schrader and Hill, 191 O, p. 161 ). The pyrite and chalcopyrite were noted as disseminationsin the granitic rock (J. R. Thompson, written commun., 1993).Very little is known about the Edna Mine group. The majority of the workings werenot examined by USBM field crews; they are in NE. 1/4, sec. 12, T. 24 S., R. 15 E.Molybdenite is apparently a minor occurrence within this quartz-scheelite deposit (Dale andothers, 1960, p. 120-122; Keith, 1975, p. 76). Only a few of the prospects on the northernperiphery were sampled by USBM field crews in the Coronado National Forest investigation(fig. 29). The sites are along the contact with the Patagonia batholith where it has intrudedJurassic-age granitic rock.EconomicsResource assessment of copper-porphyry deposition with recoverable molybdenum inthe southern part of the Patagonia batholith is incomplete. Few data are available and mostof the alteration zones in this area were not sampled or examined by USBM field crews. Noresources are suggested by the available data. The lone molybdenum producer, Santo NinoMine, is mined out; the productive zones were not disseminated or in porphyry (Kupfer, 1965,p. E15-E16). However, resource possibilities for copper porphyries must remain open endeduntil more of the alteration zones and breccia pipes are examined and sampled.Future explorationSome exploration has been undertaken at specific mine sites; results were notencouraging. Exploration at the Santo Nino and Line Boy sites failed to locate eitherextensions of known ore trends or zones of larger tonnage, disseminated copper ormolybdenum. This work included 500 ft of exploratory drifting in the Santo Nino Mine(Kupfer, 1965, p. E16). At the Line Boy Mine, at least 36 exploratory drill holeswerecompleted, magnetometer surveys were conducted, and IP (induced potential) surveys weredone (Brooke, 1965, p. 1,2).Further exploration, which could consist simply of field examinations and sampling,may be warranted. The three mine sites are characterized by copper-porphyry type alterationzones, some brecciation, a NE. trend to mineralization, and some dissemination of metals ina two-phase granitic Laramide intrusive. Mapping by Simons (1974, map) shows several NE.-trending linear alteration zones in the granodioritic phase of the southern part of the Patagoniabatholith, along with several breccia pipes and circular alteration zones (see geologic map, fig.2). Several of the circular alteration zones coincide with the mine locations: 1 ) Line Boy andBenton mines; 2) an unexamined shaft in NW. 1/4, NE. 1/4, sec. 14, T. 23 S., R. 16 E., pl.25

1; 3) an adit on the Justice(?) mineral patent, pl. 1; 4) the shaft on the southern end of theSanto Nino patent group, pl. 1. Thedioritic phase of the Patagonia batholith, which is on thewestern slope of the southern Patagonia Mountains (fig. 2), also contains breccia pipes andnumerous linear alteration zones (Simons, 1974, map), though they trend to the northwestin this part of the batholith.Exploration of the southern part of the Patagonia batholith cannot be consideredcomplete without sampling of the noted alteration zones and breccia pipes. If this effort isundertaken, it should be remembered that sampling of surficial outcrops may not beconclusive and may not reveal molybdenum. At the Santo Nino Mine, no molybdenum wasdetected at the surface, or at depths less than 100 ft below the surface, a phenomenon thatcould be related to leaching of the outcrops (Kupfer, 1965, p. E16).Washinqton Camp/Duquesne Camp: base-metal skarn deposits(fig. 30-33) and copper-porphyry exploration targetsCalcic skarns (i.e., skarns developed from limestone, rather than from dolomites) andcarbonate replacement zones of Washington Camp/Duquesne Camp developed by contactmetamorphism along faults and shears in carbonate units of the Permian- to Pennsylvania-ageNaco Group rocks. The exposure of sedimentary rocks, with an area of about 1-mi by 1.75-mi (fig. 2), was mineralized with base metals during intrusion of the Tertiary-age granodioritepluton that dominates the core of the southern Patagonia Mountains (Patagonia batholith).The area has a long but sporadic history of mining, dating from the 1 600's. High-grade oxideand carbonate ores of silver, lead, and some copper were exploited until the early 1900's.Later, methods were developed to exploit sulfide ores, primarily copper, but with considerableadditional recovery of zinc, lead, silver, and some gold.Large-scale mining ended in the1950's. Production totals were in the hundreds of thousands of tons of ore, thousands ofpounds of copper, lead, and zinc, and thousands of ounces of silver and gold. Pride of theWest Mine (fig. 30}, Bonanza Mine (fig. 31-32), and Holland Mine (fig. 30) were the dominantproducers, but no individual mine produced 100,000 st of ores; an estimate of totalproduction from the area was made at 350,000 st (Keith, 1975, p. 76). More detail on thismining is in appendix A (p. A96-A102).Economicscollection.No base- or precious-metal skarn resources were estimated as a result of USBM dataWashington Camp/Duquesne Camp is largely blanketed by mineral patents. TheUSBM was unable to obtain permission to examine over half of the area. The few sites thatwere visited were mostly caved shafts; no tracing of skarn zones was achieved.26IIIIIIIIIIIIiIIIIII

IIIIIIIIIIIIIIIIIIIIAbsence of large-scale exploitation of base-metal skarns from this area over the past40 years is typical of the region. The last large mining efforts were during World War II, andthe early 1950's, when Federal subsidy of copper production was in place. This suggests thatthe base-metal skarn deposits are not economical to mine without supply crisis or pricesupport situations, or were mined-out, or both. Lehman (1978, p. 129-130) providesimportant observations relative to the possibilities of finding additional resources of thetraditional mined varieties (replacement zones and skarn): mining depths at individual minesseldom exceeded 400-ft, but that was largely a factor of structural offset of metallized zonesand the economics of mining. Further, no metal-zonation evidence was found that suggestedto Lehman that the ore zones pinch out at depth. Thus, it is likely that very deep exploration(500-ft +) on or near the known deposits would encounter more metallization. It should benoted, however, that continuity does not equate to economic minability for such modesttonnagedeposits.Future mineral development related to Washington Camp/Duquesne Camp could besizeable if concealed copper-porphyry deposits are discovered there or nearby. Future redevelopmentof the known base- and precious-metal skarn deposits is less likely. However,it should be noted that one copper-silver skarn in the Coronado National Forest, the OracleRidge Mine in the northern part of the Santa Catalina Mountains, is currently (1994) aproducing and profitable locality. It's tonnage (about 4 million st), which is considerablyhigher than any of the skarn deposits known in the Washington Camp/Duquesne Camp area,is a major factor in the economics of the Oracle Ridge site.Future explorationThe possibility of finding concealed copper-porphyry deposits below the WashingtonCamp/Duquesne Camp skarns was pointed out by Keith (1975, p. 23). It is common in theregion to find copper-porphyry deposits associated with base-metal skarn deposits. Skamhostedore deposits are significant because they contribute a significant tonnage to minereserves (Einaudi, 1982, p. 144). One example is the Twin Buttes deposit in Pima County,AZ, where five mines in carbonate rocks over the eventually discovered copper porphyryproduced 479,000 st of copper ores (4% Cu to 7% Cu) with byproduct silver (1 oz Ag/st to9 oz Ag/st). A small part of the tonnage was lead and zinc ore (Titley, 1982, p. 403). At theSan Xavier Mine, part of the Mission complex in the Pima mining district, south of Tucson,AZ, 800,000 st of carbonate ores were mined (Titley, 1982, p. 403). The Mission depositcomplex as a whole, which includes the San Xavier Mine, among others, is nearly alldeposited in a carbonate-dominant sedimentary-rock sequence (Jansen, 1982, p. 467), TheEsperanza deposit is another example; it was mined for about 2,000 st of carbonate ores over40 years before the chalcocite blanket part of the copper-porphyry deposit was discovered27

(West andAiken, 1982, p. 433). Skarn-hosted ore deposits are of additional significance asa favorable geologic indicator. Copper-porphyry deposits associated with c~_rbonate ores havebeen shown to contain higher hypogene copper concentrations than copper-porphyry depositsthat lack any associated carbonate rock (Einaudi, 1982, p. 139, 144; Barter and Kelly, 1982,p. 407-408).At Washington Camp/Duquesne Camp, USBM rock-chip samples are concentrated inthe northern part of the area, and many are high-grade, select samples; as might be expected,those samples reveal no zoning of copper and lead-zinc, and no zoning of precious metals.Exploration designed around the major structure in the area may be well advised. Lehman(1978, p. 163) describes the overall north-trending and north-plunging anticline emplaced onsedimentary rocks in the area by the intrusion of the pluton. Primary copper mineralizationmay in part be controlled by this overall structure; faults should be considered also. Thenorth-trending fault set in the area predates the intrusion, and may have localized coppermineralization at depth (fig. 30). The post-intrusive set of faulting is east-trending; thesenormal and reverse faults may have prepared the ground for supergene chalcocite enrichmentshould any copper-porphyry type primary copper metallization be present at depth.Manganese depositsThe U.S. is 100% dependent on foreign sources of manganese ores 15 and has beenso for years (Jones, 1992, p. 108). Domestic, land-based manganese deposits arecharacterized by: 1) high-percentage recoverability through acid-leaching processes; and 2)grades that are far too low for economic recovery. The long-term resource outlook, in termsof both available poundage of manganese and the strategic nature of this metal, which isessential in steel manufacturing processes, is such that the U.S. Government (NationalMaterials Advisory Board) has recommended that no land-based domestic resources ofmanganese be developed under circumstances other than dire emergency (U.S. Bureau ofMines, 1977). An example of such an emergency would be a severe supply disruption.Nearly half the manganese consumed in the U.S. comes from Gabon. Brazil, Australia, andMexico are the other major foreign suppliers; collectively, the four countries account for 90%of imported manganese (Jones, 1992, p. 108).There are several manganese deposits in the Patagonia Mountains-Canelo Hills Unit.Some have produced a few thousand tons of ore, and others are small occurrences confinedto narrow fractures. All are detailed below. More information on the sites is available inappendix A of this report. These deposits and occurrences of manganese are pertinent toNational Forest management only in the event of import supply disruption. Sites most likely1~ Defined as containing 35% manganese or more (Jones, 1992, p. 108).28IIIIIIIlIIIIIIIIIII

IIIIIIIIIIIIIIIIIII|to experience exploration work and possible development under such conditions are the focusof the following sections. All of the deposits contain silver, which, though not in economicconcentrations in itself, would nevertheless amount to an appreciable byproduct revenuesource if the manganiferous deposits were actually mined.Hardshell manto deposit (fiQ. 34}Data concerning this deposit are from existing literature.stratiform-like deposit, concealed entirely in the subsurface.Hardshell is a manto, orIt has never been mined. Thesite is on a mineral patent group controlled by ASARCO, Inc. The true nature of the mantowas discovered in the 1940's and 1950's during exploration drilling around the HardshellIncline Mine (fig. 34) in search of sulfide ores. The manto was delineated by further drillingin 1967 and 1968 (Koutz, 1984, p. 205).Hardshell manto is a Tertiary-age, shallow, oxidized (initially sulfide), low-grade deposit,hosted primarily in Mesozoic-age rhyolite tuffs along the north-dipping (20 °) contact betweenthose tuffs and Permian-age limestone below.Fault conduits from an intrusive below thedeposit permitted metals to migrate, and they concentrated particularly under a massivesiliceous rock that essentially forms a cap to the deposit.originated in the Laramide-age Patagonia batholith, is zoned in the manto.Metallization, which probablyManganese andlead dominate the upper part and manganese and zinc dominate the lower sections. Copperis elevated in the root zones at the contact with limestones. Dominant minerals present aremanganese-and-silver oxides 16 and manganese oxide (pyrolusite) (Koutz, 1984, p. 199, 202,204).Hardshell manto is 100-ft to 400-ft-thick, and averages about 200-ft-thick.Depthsto the manto top range from a few tens of feet deep around the Salvador Mine (fig. 34) to amaximum of 450-ft-deep under the Hardsheil Incline adit portal.Data used to contour theperimeter of the manto are limited (see fig. 34 footnotes) and indicate that resources arewithin a 2,000-ft by as much as 1,000-ft area that is apparently immediately south andsoutheast of the Hardshell Incline Mine adit.Industry exploration discovered the thickestaccumulations of manganiferous rock in that 2,000-ft by 1,000-ft area; exact perimeters ofthis zone are not known by USBM. Some lower-grade manganese and silver metallization alsooccurs in the clay zone above the manto deposit and in the carbonate rock below.Metallization dissipates to the northern, southern, and western peripheries of the manto; thedeposit is truncated by the American fault along its southeast margin (fig. 34).18 These minerals are mainly of the cryptomelane-coronadite, romanechite, and todorokite groups, chalcophanite, and nsutite.29

ResourcesGrades and tonnage of the manto deposit published in Koutz (1984, p. 199) are 6million st of 15% MnO~, 5 oz Ag/st, several total percent Pb and Zn, and minor Au (less than0.01 oz Au/st). These are in the category of measured, subeconomic resources. It isassumed that this tonnage is confined to the 2,000-ft by approximately 1,000-ft areadescribed above (immediately south and southeast of the Hardshell Incline Mine adit), whichis only part of the manto delineated on fig. 34. Tota/ tonnage of the overall manto, therefore,could be three times the published 6 million st resource figure.tonnage are not known, but are certainly low (less than 15% Mn02).Economics of hypothetical mining of the Hardshell manto depositGrades of the additionalThe USBM model constructed to simulate hypothetical mining of the Hardshell mantois based on open-pit mining followed by beneficiation and recovery of manganese through thedithionate process of sulfur-dioxide (SO 2) leaching.Subsequent recovery of silver throughcyanidation is also considered. Preference for the dithionate process of manganese recovery,explained in more detail in appendix A, p. A116-A117, is based on its long-termestablishment1;; selectivity of SO2 leaching for manganese over iron and other impurities(see Wyman and Ravitz, 1947); proven high manganese recovery of about 96% (Farnham andothers, 1961, p. 165); and formation of a product that is sufficiently pure to be used in thesteel-making process.Flotation, the most common beneficiation practice applied tomanganese ores, does not work well on manganiferous material from the Patagonia Mountainsdue to interference by high calcite and silica content (Farnharn and others, 1961, p. 164).The mineralogical composition of the Hardshell manto material is not precisely known, butKoutz (1984, p. 203) reports that calcite is a major constituent of manganiferous rock fromthe area and Romslo and Ravitz (1947, p. 11 ) report that silica is a major component in orefrom the Salvador Mine (about 63% to 67% SiO2), which is a relatively small deposit abovethe Hardshell rnanto.Only the rudiments of the economics are presented here because the mining andrecovery of manganese, or manganese and silver, from this deposit are so far from beingeconomical. Low manganese content in the manto and low price of manganese available fromforeign sources are the major contributing factors to the negative economic situation.Contained manganese value of the manto resource is $10.32/st~% based on early 1994 price17 USBM experimentation with various uses of SO 2 as a lixiviant has been on-going for over 60 years. (See Dean and others,1934.) During WWlI, when supply of overseas sources of manganese was in jeopardy, the USBM built a pilot-scale dithionateleachplant for the recovery of manganese from domestic ores. (See Rampacek and others, 1959.)~8 Even this value is inflated, because it is based on the price of 46% to 48% Mn in metallurgical-grade ores, which are morevaluable than the low-grade rock in the Hardshell manto.30IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIof ore available on the international market (Jones, 1994, p. 108), down 41% from theprevious year. Expected losses of about 4% in the dithionate process (Farnham and others,1960, p. 165) reduce this value to about $9.90/st. Costs of open-pit mining, beneficiatingthat mine product through the dithionate process, and sintering the filtered leachateprecipitate are over 21 times that amount 19. These are operating costs only; capital costsof the mine infrastructure would be $22.4 million, according to PREVAL modeling.Underthese prohibitive economic circumstances it is presumed illogical to expend capital in buildingan on-site mill and sintering plant, so hypothetical costs of those investments were notestimated here. It is assumed any production from this deposit would be shipped as raw mineproduct to an off-site location for the crushing, blending, and grinding needed to make adithionate mill feed; for the dithionate process of SO2 leaching; and for the follow-up sintering.Silver recovery.--No direct testing of silver recovery from Hardshell manto rock isknown by USBM, but manganiferous samples from the Salvador Mine were subjected tocyanidation silver recovery laboratory tests by USBM over 50 years ago (Romslo and Ravitz,1947, p. 12). It is assumed for the purposes of this discussion that the results of tests onSalvador Mine rock are comparable to Hardshell manto rock due to like genesis and very closetemporal and spatial relationships between the two deposits.About 85% to 86% of the silver in Salvador Mine ore can be recovered throughcyanidation; the cyanidation feed, however, was a product of flotation milling, not a productof the dithionate process of SO2 leaching. It has been reported that the dithionate processpicks up little of the silver (Romslo and Ravitz, 1947, p. 11), but precisely where the silverresides after implementation of the dithionate process has not been reported.Silver mayreside in the product formed in the lime-slurry step of the dithionate process, which isdesigned to remove zinc, iron, and other impurities from the pregnant, manganiferous leachsolution. (See process described in Rampacek and others, 1959.) No testing is known thathas attempted to recover silver through cyanidation from such a slurry product and the 85%to 86% cyanidation silver recovery reported by Romslo and Ravitz (1947, p. 12) may not bepossible from such a chemical compound. If such high recovery of silver were shown to bepossible, it would supply revenue of only an additional $24/st, based on the grade of silverin the Hardshell manto and a silver price of $5.00/oz. That is a small amount of revenuecompared to the projected mine and mill operational losses reported above. Silver may also10 Costs are only approximate, being derived by the following methods. Costs of the dithionate process as described inRampacek and others (1959) were once estimated by USBM, using CES (Cost Estimation System); estimates are reported inJanuary 1979 dollars (USBM files). By the method of indexing alone, those old cost estimates were updated to January 1994dollars, which accounts for inflation and approximates other economic changes, but incorporates some inaccuracies as well.31

eside in the leach residue of the dithionate process, from which it probably could berecovered at a high percentage rate under the proper pH conditions.Future trendsUSBM research concerning recovery of manganese and silver from low-grade domesticdeposits continues, and may lead to breakthroughs that will change the 9conomics of theHardshell manto deposit. Laboratory tests on manganese extraction using dilute, aqueoussolutions of SO 2 on manganiferous samples from relatively small deposits above the Hardshellmanto (apparently the Hardshell Incline deposit and the Salvador Mine, both of which aredetailed below), followed by cyanidation to remove silver, give promising recoveries: 91%to 98%o of manganese and 66% to 82% of silver (Pahlman and others, 1987, p. 4; Pahlmanand Khalafalla, 1988, p. 7). One problem is achieving sufficient neutralization of the SO 2-leached batch of rock for the cyanidation process to work effectively; the SO= leach requiresa pH below 2. Further, the process must be kept in a controlled pressurized atmosphere toprevent volatilization and loss of SO 2 (D. C. Marozas, USBM, 1994, oral commun.). OngoingUSBM research is investigating processes that would allow silver extraction to take place athigher pH values. The controlled atmosphere requirement eliminates the obviouslyeconomically attractive concept of heap leaching the mine product, first for manganese, thenfor silver.Another economically interesting method being considered under USBM research is insitumining of the manganese'(Marozas and others, 1991 ), i.e., pumping SO2 leaching solutiondown boreholes into the deposit and pumping leached Mn in solution back out. The methodwould significantly reduce mining costs by eliminating the need to move the rock from anopen-pit mine. However, SO 2 volatilization may remain a problem; it could be lost throughgeologic structures and natural porosity. Environmental concerns must also be addressed; thelow pH leach solutions may be channelled away from the deposit by preexisting geologicfractures, causing intolerable loss of leachate solution into the environment. Cyanide leachingof the silver would be eliminated completely in the in-situ scenario, and the silver resourcewould be left in the ground.Other recent USBM research involves investigating biological leaching of manganese,through which bacterial microorganisms such as Achromobacter spp., Bacillus spp.,Enterobacter spp., and Asperguillus niger solubilize manganese (Noble and others, 1991, p.1 ). The processes may be shown as offering effective, environmentally sound recovery of themetal.32IIIIIIIIIIIIIIIIIIII

!ii~"IIIIIIIIIIIIIIIIManganese deposits peripheral to Hardshell mantoHardshell Incline Mine (fig. 34-36)Hardshell Incline deposit is essentially a smaller version of the Hardshell manto,positioned about 200-ft above the manto. However, the Hardshell Incline depositdemonstrates strong control by a northwest-trending shear (Koutz, 1984, p. 199,204, 206-208; Jones and Ransome, 1920, p. 120) which probably limited the overall size of the depositby limiting lateral migration of metallizing solutions. Within the shear zone, the deposit is bestvisualized as a series of stratiform, north dipping (25 ° to 40 °) zones, 10-ft to 60-ft-thick, withlimited lateral extents and a northeast plunge (about N. 60 ° E.). On a larger scale, though, theoverall fracture control trends northwest (fig. 35-36). A northeast-dipping shear zone thatparallels the ore-hosting shear zone of the Hardshell Incline Mine limits the metallization lateralextent to the northeast. Ore-grade metallization has been found down plunge for over 600ft (over a 250-ft vertical distance) over a 250-ft-long lateral extent (fig. 35-36).Economic minerals at the site are oxidized lead-silver and manganese minerals thathave replaced tuffs along the shear. Manganiferous minerals are pyrolusite, psilomelane, andbraunite in hard, siliceous, irregular, lenticular zones on the rhyolite footwall of the metallizedzone. Hangingwall metallization, limited in vertical extent by white, impervious fault gouge,is comprised of lead-silver rich and manganese-zinc poor minerals (cerussite, minor anglesite,galena, and pyromorphite-mimetite). Hardshell Incline deposit was mined for over 24,000 stof lead and silver ores, but total production over the life of the mine was probably no morethan 30,000 st. Production took place between 1895 and about 1920, between 1943 and1948, and in 1964. About 5 million Ib lead and 250,000 oz Ag were recovered (Farnham andothers, 1961, p. 170). All the lead-silver ores were manganiferous, but the site was not ofinterest for manganese until World War 1. Manganese ore production traditionally attributedto the Hardshell Incline Mine during World War I (500 st of ore and 500 st of concentrates,both with over 40% Mn) (Farnham and others, 1961, p. 170; Jones and Ransome, 1920, p.176-177; Wilson and Butler, 1930, p. 93-94) actually came from the early Salvador Mineworkings (fig. 34). Additional data and documentation relative to this site are in appendix A,p. A113-A114.Resources and economics.--Important data for addressing mineral resources at theHardshell Incline Mine are the tenor of metallization and continuity at the deepest part of theinclined shaft, where the last stages of mining probably took place in the 1960's. Those dataare unknown. USBM field crews that entered the mine in 1989 did not gather data on theextent of the metallization. The low oxygen content prevented the crew from penetrating themain inclined shaft to even the 325-ft level. It is doubtful that any data could be gatheredfrom the depths of the inclined shaft due to flooding. Natural water level in the mine had33

flooded the 500-ftlevel by 1915 (Schrader, 1915, p. 267). The mine was opened to evendeeper levels in subsequent years (fig. 36), but had in part re-flooded by 1977 (Koutz, 1984,p. 207).A resource scenario for this site must address both lead-silver metallization andmanganese. Lead-silver metallization, if it continues at depth, is not economic to mine under1994 market conditions, based on the modest life-of-mine production grades estimated byKeith(1975, p. 58): 6% Pb, 8ozAg/st, 0.5%Cu, and minor Zn and Au, and limited tonnage.Manganese tenor is not known. A cross section prepared by Koutz (1984, p. 207) and datafrom old mine maps suggest that the Hardshell Incline deposit is probably no more than 5%the size of the underlying Hardshellmantodeposit. This could still amount to a considerabletonnage (nearly 1 million st), since the 6 million st resource estimated for the manto depositis only part of the deposit shown on fig. 34. These unknowns make accurate estimation ofmanganese resources at the site impossible. By itself, the Hardshell Incline deposit probablywould not be mined for manganese, but tonnage could be recovered here in conjunction withdevelopment of the underlying Hardshell manto deposit by open-pit methods duringoverburden removal.Other manganese depositsThere are several other manganese properties in the vicinity of the Hardshell deposits.Most were worked for lead and silver from argentiferous lead or argentiferous manganese,primarily in the late 1800's, and again for their manganese content, mostly during World WarsI and II, and some as late as the 1950's. The sites include the Salvador, c3ender, and BlackEagle mines, and the Black Rose prospect (fig. 34, 37). Collectively, only about 7,000 longtons of manganese ore were produced from these sites. The deposits are confined to fracturezones, which limits their volume, and thus their tonnage. Most likely, they are the distalmigrations of the same metallizing solutions that formed the Hardshell manto deposit. It isquite unlikely that any of these sites will see additional prospecting or production due to theirsmall size, but some manganiferous rock could be recovered from many of them in theprocess of overburden stripping to develop the Hardshell manto deposit. The sites with thepotentially largest tonnages of manganiferous material are the Salvador Mine and Bender Mine.Details on these sites are in appendix A, p. A50-A54, A110.Manganese at the Mowry Mine areaMowry MineAnother manganiferous manto formed in the east-central Patagenia Mounta{ns atMowry Mine (fig. 38-39). This manto, which formed as a replacement of limestone along theMowry fault, is steeply dipping (NW. 80 °) and continues along strike for 600 ft and down dip34IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIIIfor 500 ft. Lead-silver carbonate ore which formed in the manto was mined for an estimated200,000 st, mostly prior to 1909. More importantly, in terms of the current (1994) resourcescenario, the gangue is highly manganiferous, occurring as hematite, pyrolusite, andpsilomelane in a layered gangue. The manganese grade is unknown; USBM personnel werenot granted access to this mineral patent group. The grade can be speculated as very low(15% to 25% Mn, or less), based on manganese ore mined to the east along the same Mowryfault at the Beyerle pit and Bullwacker deposit (fig. 38). Apparently no manganese miningever took place at Mowry Mine. This may be due to the fact that a considerable amount ofthe more than 12,000 ft of underground lead-silver workings had caved by the timemanganese was being exploited in this area, and included some surface subsidence. Mostinteresting is the suggestion in Schrader's (1915) description of the site, implying overalltonnage of the gangue could be large.estimate that tonnage.Unfortunately, not enough data are available toThe site should be considered a potential future exploration target for manganese ores,should development of such ores become important to the U.S. Regardless of the tonnage,Mowry Mine is unlikely to see development interest in any conditions other than supplyemergency. Reasons are: 1 ) probable very-low manganese grade and 2) probable deleteriousminerals in the gangue that interfere with manganese recovery (see discussion of Bullwackerdeposit, below).Recovery of silver in the gangue could help defray costs of manganeserecovery; process is described under the 'Bullwacker deposit' heading. The Mowry deposit,particularly its lead-silver and base metal resource aspects, is discussed in more detail inappendix A, p. A124-A127.eullwacker deposit (fig. 38)Bullwacker deposit is another site that experienced manganese ore production duringWorld War II, when approximately 200 It of hand sorted, 40% Mn ore was produced. Thematerial in the overall deposit is low-grade (15% Mn), high in calcium (42.3% CaC03), anddifficult to beneficiate due to the calcium content and the fine-grained intergrowth ofmanganese-oxide and gangue minerals. This has caused the need to grind to -200 mesh forattempted flotation, which still failed. The fracture zone on which this manganiferous ore wasdeposited (fig. 38) is apparently much smaller and less extensive than that of the Mowry Mineand Beyerle pit.Known deleterious aspects of the Bullwacker material are high calcium content andhigh silica, which is detrimental to both established beneficiation processes (flotation anddithionate leaching) and to an experimental process being refined by USBM researchers(leaching with aqueous S02). Recovery of silver by a processsuch as cyanidation could help35

to defray the cost of manganese recovery."Hardshell manto" headings, above.Beyerle pit and nearby workings (fig. 38)These processes are discussed under theBeyerle pit is significant because its manganese ore is probably quite comparable ingrade and mineralogy to the Mowry Mine. The pit was mined for 17,500(?) It of 25%(?)manganese ore during the World Wars and 1955. Post-mining exploration drilling around thepit area, along the Mowry fault, and in the 100-ft-deep shaft with drifting in the Beyerle pit,all failed to delineate other ruinable zones. Manganiferous mineralization continues as far eastas the East End shaft (fig. 38), and there to a depth of 150 ft.Isolated manganese sitesSeveral small, isolated manganese prospects are in the Patagonia Mountains andCanelo Hills. Most were not examined by USBM. Few data are known about them (seeappendix A, p. A41, A107, A111, A122-123, A132-133 for details).Base- and precious-metal vein depositsBase- and precious-metal vein systems in the Patagonia Mountains-Canelo Hills Unithistorically have produced either mainly lead and silver or mainly copper and silver, with orwithout significant quantities of zinc. Some gold was recovered, but always as a byproductcredit accumulated as a result of high-tonnage smelting of base-metal concentrates. Verticalmetal zonation through the veins, as described in the geologic setting section and the copperporphyry section, exists in many of the vein systems, if not all of them. Mining of the veinsystems diminished almost entirely in the 1950's and completely ended in the 1960's.Cessation of mining coincided with a major shift in U.S. mining economics.U.S. miningcompanies sought, almost exclusively, very large tonnage base-metal deposits which couldbe mined at very high mining rates. As a result, many of these individual sites were idled.The same economic situation remains today (1994) and it is unlikely that these sites will bemined again in the foreseeable future 2°.Their low gold content caused them to remaininactive even during the U.S. exploration efforts that ensued after the tremendous gold priceincrease of the early 1980's.There are four subdivisions of base- and precious metal vein deposit typesdistinguished in this report:1) zoned vein systems associated with carbonate rocks in the20 Recent innovations in mining techniques of narrow veins (primarily underground stoping methods and low-profile drills} offerpotentially significant reductions in mining costs. The techniques, however, are applicable only for those veins with dips of lessthan 45 ° (Laflamme and others, 1994). The veins in the Patagonia Mountains are all very steeply dipping, usually in the rangeof 70 ° to 80 ° .36IIIIIIIIIIIIIIIIIII

IIIIIIII-IIIIIIIIeast-central Patagonia Mountains; 2) lead-silver veins in fractures in acid, volcanic rocks(usually Tertiary- to Cretaceous-age, but sometimes older) in the east-central PatagoniaMountains; 3) copper-silver fracture and vein deposits hosted within the Patagonia batholithitself; and 4) lead-silver fractures and veins hosted in Jurassic-age granitic rock and/orPrecambrian-age granitic and dioritic rocks. Just five mines accounted for the vast majorityof cumulative, historical production from all of the mines in these four subdivisions:Mine, Trench Mine (Josephine shaft), January and Norton mines, and Hermosa Mine. All areassociated with either carbonate rocks or fractured, acid, volcanic rocks in the east-centralPatagonia Mountains. Cumulative production from the vein systems in the Patagonia batholithand the Jurassic-Precambrian complexes has been small.The base- and precious-metal vein deposits were not examined in detail during theUSBM field study of Coronado National Forest. Some sites are on mineral patents for whichthe USBM could not obtain permission for access. Numerous mine sites were inaccessibledue to shaft-only access, caving of old workings, and reclamation. Many of the mined orprospected structures themselves were simply not sampled much beyond existing excavationsby USBM field crews that performed the Coronado National Forest investigation, makinggrade-and-tonnage assessment problematic.possible.Vein systems associated with carbonate rocks, east-centralPatagonia Mountains (pl. 1 ; fiq. 3, 41-44)FluxLiterature was used to fill data gaps whereThere are 13 individual deposits or occurrences of this type, summarized below in table2. Combined, they have accounted for nearly 900,000 st of production, but nearly all of this(850,000 st) came from the Flux Mine (fig. 3, 41 ). Not surprisingly, Flux Mine is the only sitewith appreciable widths inthe mined zone (8 ft to 30 ft). Of the remaining 12 sites, noneproduced over 13,000 st, and most have produced between 500 st and 0 st.combination of very sparse field data and/or inaccessible workings has created a data gapwhich prevents resource estimates at these sites. Literature provides data which suggeststhe Morning Glory Mine (fig. 3) may have as much as 45,000 st of copper-lead-silverresources in place in a 4-ft to 10-ft-wide metailized zone. This resource figure cannot beverified with available field data. If present, the tonnage is unlikely to be mined, due tonarrowness of the structure and the commodities involved. No other sites have metallizedstructures wide enough to be considered as a resource; they range from 0.5 ft to 4 ft inwidth. Detailed information on the sites is provided in appendix A. See table 2, below, forspecific page references in that appendix.37The

Name; sample nos.; fig. no.;descrip, in appendix ATable 2.--Summary of vein deposits associated with carbonate rocks,Patagonia Mountains-Canelo Hills Unit.~lux Mi=~e; PA139-142; fig. 3,4 p A26 A27World's Fair Mine; PA143-14b: fig 3, 42; p. A28-A29Chie~ Mine; PA169-195; ~ig. 3,9 [breccia pipe part only); p.A33Blue Nose Mine; PA318-324;fig 3: p. A42.American Mine; no samples,site not examined by USBM;fig 3; p. A109.Augusta Mine; PA326-327;hg 3, ~,3; p. A43.Endless Chain Mine; PA328-331: fig. 3; p. A44.Morning Glory Mine; PA332-334; fig. 3; p. A45-A46.Olive Mine; PA534-535; pL 1;p. A85.Occur~nce type, commodiSes"Vein-like" structure through Is.and surrounding T. vole. Majorsulfide content. Zoned: Pb-Ag. upper; Zn, middle; Cu,lower.Qtz vein in Is & in K. intrusive+/- K. vole. Zoned: Pb-Ag,upper; Cu, lower; Au increaseswith depth.Part silicified fractures throughIs. and J.-Tr. vole.; part skarn;part breccia pipe (PAl 71-188).Disseminated and pocketymetallization in Is. and quartziteIK. or older). Pg-Ag and minorCu, Au. This suggests metalzonation would be found ifdeeper excavation made.Vein at ts./rhyolite contact, Pb-Ag, minor Cu, This suggestsmetal zonation would be foundif deeper excavation made.Quartz vein in complex ofcarbonate rock in K. BisbeeGroup. Pb-Ag, minor Au. Onlysupergene zone mined. Deeperexcavation may reveal metalzonation.Replacement zone in K.quartzite 1. Cu-Ag. Possiblyzoned; erosion may haveremoved an overlying Pb-AgZOne.Silicated Is. Probably zoned:Zn (upper); Cu-Ag (lower).Some skam; also diorite likethat of M0wry Mine; slight Cuconcentration (0.17% Cu) withskein. Mowry Mine-typeoccurrence possible.38Width, down,lip exposure ofmetallized zone; production8-ft to 30-ft wide;700 +ft deep;850,000 st mined.6-ft wide;1,000 ft deep;13,000 st mined.2-ft to 4-ft-wide;230-ft deep;No production quantified; someproduction likely.4-f[-wide or less;2OO-ft-deep;13,000 st mined.3-ft to 10-ft-wide;90-ft-deep;7,800 st mined.0.5-ft-wide;100-ft deep:100 st mined.2.5-ft-wide;depth not known;100 st mined.4-ft to 10-ft-wide;200~ft-deep;5,000 st mined.Width, depth unknown;probably no production.Resource assessment, notes{see footnote 20}Field data, avail, literature toosparse to allow assessment.Site undergoing reclamation inApril 1994. Likely will neverbe reopened.Field data, avail, literature toosparse to allow assessment.Site unlikely to see moredevelopment due to narrowmetallized zone.Field data, avail, literature toosparse to allow assessment.Site unlikely to see moredevelopment due to narrowmetallized zone.Strike extent not known. Siteunlikely to see moredevelopment due to narrowmetallized zone.No field data. Site unlikely tosee more development due tonarrow metallized zone.Strike extent not determined.Site unlikely to see moredevelopment due to narrowmetallized zone.Long stdke length of fracturezone (1,6OO ft), but most notsampled. Site unlikely to seemore development due tonarrow metallized zone.Literature suggests 45,000 stremains of 50,000 st resourceblock delineated in mining era.None may be accessible dueto mine deterioration. Siteunlikely to see moredevelopment due to narrowmetallized zone, overall |owtonnage.Field data very limited; verypoor geologic exposure. Siteunlikely to see moredevelopment due to narrowmetallized zone.IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIIName; sample nee.; fig. no.;descdp. In appendix AUnnamed prospect; PA536-538; pl. 1; p. AB6.Table 2.--Summary of vein deposits associated with carbonate rocks,Patagonia Mountains-Canelo Hills Unit.Winifred Mine; PA539-541; pl.1; p. AB7.Buffalo group (includes LeadQueen Mine); PA146-159; fig.44; p. A30.Wieland group (includes GreatSilver Mine, and Basin No. 1,Dewey, and Red Rockprospects); PA160-168; fig.44; p. A31-A32.Occurrence type, commoditiesVeinlets at contact of quartzite 1end J.-Tr. volc. Copperpresent. Presence of coppercarbonate minerals suggests Is.is nearby.Siliceous vein in blocks of Is.and shale enveloped by J.-Tr.vole.Silicified veins in K. volc.Carbonate minerals suggest is.is nearby (see Wieland group,below). Zoned: Pb-Ag (upper);Cu-Pb-Ag (lower); minor Au.S[llcated Is. and hydrothermallyaltered shale in part; gougezones and silicified veins in K.volc., in part. Cu-Ag, minorAu. May have been zoned likeBuffalo group, above, but upperPb-AD zone removed byerosion.Width, down-dip expo=um ofmetallized zone; pmducldon¢-ft-wide;depth unknown;probably no production.Width unknown;230 + (?)-ft-deep;At least one carload (100 st7)mined.Less than 4-ft-wide;160-ft-deep;500 st mined.Width: few in. to few f't.;100(?)-ft-deep;100(?) st mined.Resoume assessment, notes[see footnote 20)Field data too sparse forassessment.Field data very sparse, butprobably too narrow of amatailized zone to encouragefuture development.Site unlikely to see moredevelopment due to narrowrnatallized zone.Site unlikely to see moredevelopment due to narrowmetallized zone.Abbreviations used in table 2: K., Cretaceous-age; J., Jurassic-age; Tr., Triassic-age; T., Tertiary-age; volc., volcanic (rock); Is., limestone; qtz.,quartz.1 Many of these carbonate rocks are exotic blocks, transported to their positions on volcanic flows or distributed during hypothesized calderacollapse (Simons, 1974, pamphlet). The sedimentary rocks incorporated within the Bisbee Group also includes quartzite and shale. In some cases,the quartzite and shale host metal occurrences.Vein systems in fractured, acid volcanic rocks, eastcentralPatagonia Mountains (fig. 3, 34r 4511Temporally and genetically, these deposits which are in Cretaceous/Tertiary-age acidvolcanic rocks are probably no different than the deposits associated with carbonate rocks,discussed above.Both likely resulted from intrusion of the Patagonia batholith, andassociated metallization. Similarities also exist with regard to narrow structural widths andthe commodities that were mined.Trench Camp and Alta Mine (fig. 3, 34)This area consists of Trench Mine (Josephine shaft), the original Trench Mine, JanuaryMine, Red Bird (Norton) Mine, Humbolt Mine, unnamed prospects PA306-311, and Alta Mine.All, except the prospect PA306-311,are in fracture system,., through Tertiary- andCretaceous-age volcanic rocks. The area is significant for its past production of lead-silver39

ores (copper-zinc byproduct} 21 from quartz-sulfide veins and siliceous sulfide-bearing dikes.Over 300,000 st were mined, mostly from Trench Mine (Josephine shaft), but significanttonnage was also mined from the January-Norton group, and the original Trench Mine. Detailson all these sites are in appendix A, p. A37-A40, A47-A48.In this area, siliceous veins and dikes are confined to three fracture zones, all of whichare probably interconnected. January-Norton group, the original Trench Mine, andAIta Mine(fig. 34) are on one such fracture (see fig. 3); Trench Mine (Josephine shaft)is said to be onan extension off this same fracture, but no mapping is available to verify this. Humbolt Mine(fig. 45) is on a fracture that intersects the January-Norton fracture.about the structures.Very little is knownOf all these mines, only a small part of the Humbolt Mine workingswere accessible to USBM field crews. Literature provides other information.Data suggestthese mined structures are very narrow, around 2ftto3 ftinwidth. Structure widths at theTrench Mine (Josephine shaft) and at original Trench Mine are not known by USBM.hkely that the Trench Mine (Josephine shaft) vein is wider than 2 ft, based on the long andproductive history of the mine. Most significant is that none of these sites were mined afterthe mid-1960's, and the largest operation, Trench Mine (Josephine shaft), was reclaimed,mainly during 1990 and 1991. The best assessment with available data is that the TrenchCamp area will not be mined in the future, primarily due to low vein tonnage and reclamationof the Trench Mine (Josephine shaft) and mill tailings area.Alta Mine {fig. 34) has a more favorable resource scenario, based on looselydocumented and unconfirmed historical data from literature. A reported high-grade zone with2 oz Au/st, discovered on the mined structure around the turn-of-the-century at a depth of250 ft, was allegedly never mined (Schrader, 1915, p. 272). That is a favorable gold grade,but neither the absence of any data on continuity of that high-grade zone nor the narrownessof the vein (2-ft to 3-ft) are favorable factors.It isFinally, the site was reclaimed by 1990 or1991. If this high-grade zone does still exist in the mine, and some continuity could beshown, the site may be prospected in the future by a small mining enterprise. That event isnot likely. Such work would probably consist of drilling into the structure from the surfaceand geochemical sampling. The absence of mine maps for the site and the presence of 4,000ft of underground excavations make exploration drilling fraught with potentially expensivehazards, since drilling into old workings could result in loss of down-hole equipment. Absenceof data on continuity prevents resource estimates from being made by USBM.21 Trench Mine (Josephine shaft) is an exception to this generalization in that it was a major Arizona producer of lead andzinc in the 1940's (see appendix A, p. A38). Absence of quantifiable data creates the situation where USBM does not knowthe relative amount of lead-zinc ore produced, compared to lead-silver ore.40IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIHermosa Mine {fig. 34)This patented site was not accessed by USBM; data from literature provide some basisfor an assessment. The siliceous, low-grade silver (5 oz Ag/st) breccia that was mined at theHermosa deposit is hosted in older rhyolite than are the deposits in the Trench Camp area andAlta Mine.The site is significant in that it has yielded 70,000 st of 20 oz Ag/st ore.Extensive workings had to be excavated to get that much ore, and the majority of the ore wasused as smelter flux, which yielded silver credits.Irregular vein width is a negativecharacteristic of the site. Available data suggest that this deposit will not be economic tomine further, based on low, irregularly distributed tonnage, low metal grade, and unusabilityof the old workings, which have undergone some degree of caving resulting in surfacesubsidence. The most expedient way to delineate additional resources in an inactive mineproperty is through data gathered from the old workings. That course may be eliminated atHermosa Mine.Metallized fractures and veins in Laramide granodioriteof the Patagonia batholith (fig. 47-54)Numerous metallized faults and shears, some with intermittent quartz-vein fillings, havebeen mined or prospected in the Patagonia batholith. Most contain at least some evidenceof alteration, which is probably hydrothermal in origin. The granodiorite batholith itself is thelikely source of the metallization. Production was base-metal-sulfide copper and silver ores,with some minor recovery of lead and gold, and was low in tonnage, with no mine yieldingover 2,000 st. Mining took place very intermittently, between the late 1800's and the late1950's (Keith, 1975).Persistent northeast fracture trend (pl. 1 & fig. 47-54)Most persistent among fractures in the Patagonia batholith is a N. 15 ° E. to N. 20 ° E.trend that encompasses six major segments of fracturing with vein filling (pl. 1 & fig. 47, 50,52). Jackalo-Paymaster segment is the longest, continuing for 10,000 ft along strike. Othersegments demonstrate at least some offset from the Jackalo-Paymaster segment (see pl. 1,fig. 50, 52). Buena Vista-King Mine vein (fig. 47) has been examined by USBM in more detailthan other segments.Buena Vista Mine-King Mine vein (fig. 47-49).--This intermittently exposed, 3,500-ft-long shear in granodiorite (pl. 1, fig. 47) (Simons, 1974, map), filled intermittently with quartz,contains base-metal sulfide minerals in both lithologies. The main structures [two quartz veinsat lower elevations (fig. 48), and one quartz vein in the higher parts of the system (fig. 49)]are thin, averaging 2.7 ft in width. Copper is the only metal with appreciable concentrations,averaging over 1.2% Cu in 54 samples (see appendix A, p. A76-A83, for more details). Gold41

concentrations arelow: samplePA697, in the Buena Vista Mine (fig. 48), contains 0. 7 ppmAu, and nearby sample PA699 contains 0.4 ppm Au, but all other samples from the veinscontain less than 0.01 ppm Au (0.0003 oz/st). Silver content was also high in sample PA697{10.7 oz Ag/st), but all other samples from the structure contain less than 1 oz/st of silver.It ~s not economical to attempt to recover gold or silver at these concentrations from such anarrow structure (see footnote 20).Resources estimated by USBM include 225,000 st of indicated, subeconomic copperbearingquartz vein, with 1.2% Cu, on 2,690 ft of strike between the King Mine and shaftPA707 (fig. 47). At least some of that amount has already been removed at workingsnumbered PA642-PA707 (fig. 47), perhaps totalling 3,000 st to S,000 st. About 810ft ofthe strike length of this vein has not been examined by USBM, and nearly all of that issouthwest of sample site PA707 (fig. 47). This unexamined segment of the overall structurecould contain another 16,000 st of vein quartz, if the average width is the same as the partsexamined by USBM. It is quite unlikely that this vein will be explored for future mining;copper concentrations, on the average, are notable, but the overall thinness of the structureis quite detrimental to future development. Mining of steep-angle, vein-type structures ofsuch narrow widths can cost $100 or more per st of ore mined (see footnote 20). Incomparison, the contained copper value of the estimated resources is about $23/st. Mininglosses and actual recoveries in the beneficiation process would increase this disparity further.Jackalo-Paymaster vein (pl. 1, fig. 50-53).--This quartz vein with base-metal sulfideminerals, occupies a fault zone and has a 10,000-ft strike length (Simons, 1974, map).USBM sampling has tested only a small part of the strike length, primarily along a 1,150-ftlongsegment at and near the Jackalo Mine (fig. 52-53), where 15 samples (PA564, 566-567,569-572, 574-581) contain, on the average, less than 0.2 ppm gold (or 0.005 oz Au/st), orabout 200 times less than the concentration needed for consideration as a vein-type goldresource to be developed by underground methods. Copper content, averaging about 0.9%in the 15 samples, could be, at best, only a byproduct of other metal mining from this thinvein, which is less than 2-ft-wide, on average. Higher gold content was encountered insamples farther north on the steeply dipping Jackalo-Paymaster vein, at the Enterprise Mine,Paymaster Mine, and shaft PA520 (fig. 50-51 ). A sample from the vein at the Enterprise Minecontains nearly 2.5 oz Au/st (fig. 51, sample PA522), but there is a possibility of supergeneenrichment in that sample. Samples at the Paymaster Mine (PA527-528) and shaft PA520(fig. 50), both about 2,000 ft from the Enterprise Mine, show markedly less gold (about 0.5ppm to 0.8 ppm Au).There is not enough proof of metal continuity in the Jackalo-Paymaster vein to allowestimation of gold and byproduct copper resources. This is largely a function of the sparseUSBM sampling, attributed to limited underground access and outcrop, but is also affected42IIIIIIIIIIIIIIIIIIi

IIIIIIIIIIIIIIIIby thinness of the vein, and low metal content in the more heavily sampled segment.Generally, mining interests would be seeking consistent gold content of 1 oz Au/st or morein such a narrow quartz vein (see footnote 20). Nevertheless, this vein cannot be completelyeliminated as an exploration target on the sparse data available.Other vein segments.--Three other quartz vein segments paralleling the Jackalo-Paymaster vein appear to contain low tonnages (166,000 st to 270,000 st) of inferredsubeconomic copper resources. These are the Pronto Mine, Gladstone Mine, and MinnesotaMine segments (fig. 52, PA582-596, 599-601). Because field data are extremely sparse,uncertainties exist about vein widths (apparently very narrow; 3-ft to 4-ft wide), coppergrades (most samples are high-graded; approximately 1% Cu is suggested), and continuity ofmetallization (very limited strike lengths actually sampled by USBM). The Minnesota Minevein system in particular, has been examined along only a small part of its strike length. Fielddata are so sparse for other vein segments in the area that not even inferred resourcetonnages can be estimated (see fig. 52, Gross prospect, PA597-598; unnamed prospectPA579; also, fig. 50, Homestake Mine, PA518-519; prospects PA515-517; Guajolote Mine,PA529).No vein segments are likely to be developed due to very narrow widths and thecommodities contained. Only appreciable gold content (1 oz Au/st, or more) might elicitfuture exploration interest (see footnote 20). There is a strong indication that no such goldconcentrations exist here. Historically, very low tonnages have been mined from the veins.More data on the specific sites are presented in appendix A, p. A76-A83.East-west trending veins (fig. 55-58)Several narrow base- and precious-metal-sulfide bearing fractures in the Patagoniabatholith trend slightly north of east. No production tonnages were ever documented for anyof the sites, however, some gold, copper, and silver were recovered. Some of the sites alsocontain lead, which apparently was not mined, with the possible exception being the Big LeadMine. The sites are the Big Lead, Golden Rose, and Bennett mines, and Specularite prospect(fig. 55-56), and the O'Mara Mine (fig. 57-58). Several of the structures have long strikelengths, according to geologic maps in the literature (1,000 ft to 4,000 ft) but they were notsampled outward from main mine excavations and samples that were collected are high-grade.Limited knowledge of structure widths prevents grade-and-tonnage assessment.Big Lead Mine (PA628-632) and Golden Rose Mine (PA633-635) (see fig. 55) are ofthe most interest, because of their historically reported metallized zone widths (25-ft wide atBig Lead; 3-ft to 12-ft wide at Golden Rose), and the fact that gold was sought at both sites.Further, USBM samples, although they are high-grade, contain appreciable gold concentrations[4 ppm Au to 6.5 ppm Au (or 0.1 oz Au/st to 0.2 oz Au/st) in four of the eight samples, less43

than 1 ppm Au in the rest, appendix C]. Both mine sites therefore have some possibility forfuture gold exploration.There are data gaps relative to metallizationcontinuity at Big LeadMine and metallization continuity and overall strike length of the Golden Rose Mine structure.Further investigation likely would show the gold is confined to low-tonnage, high-grade zones,and that the overall tonnage is too low to warrant mining (see footnote 20).Bennett Mine (fig. 55-56, PA638-640) metallization may also be distributed in a widezone rather than a narrow vein, but USBM samples indicate only copper and silver inappreciable quantities, not gold. That reduces the possibility for additional exploration workat the Bennett Mine. Specularite prospect (fig. 55, PA636-637) hasa significant data voidconcerning structural data, but USBM sampling does not indicate any appreciable metalconcentrations there. O'Mara Mine (fig. 57-58} is within a 5-ft-wide quartz vein with a longstrike length, most of which was not sampled or examined. USBM samples do not suggestappreciable gold concentrations there, rendering of little significance the elevated copper andsilver detected in the narrow structure.A83.Documentation and additional data concerning these sites are in appendix A, p. A76-Vein systems on the west slope of the Pataqonia Mountains,hosted in Jurassic-age and Precambrian-age intrusive rocksThere are two areas of vein/fracture systems hosted in either Jurassic-age graniticrocks, Precambrian-age granitic-to-dioritic rocks, or both. The likely mineralizing agent is thePatagonia batholith. Most sites contain intermittent, narrow, quartz-rich, weakly metallizedveins, less than 4-ft-wide; a few are simply metallized fractures. No site has produced morethan about 600 st of ore. Most sites were prospected primarily for lead and silver but severalalso contain copper.Northern groupA northern group of veins/fractures consists of 11 sites. The Sonoita, Robert E. Lee,Palmetto, Jarilla, and Old Timer sites (fig. 59) all contain lead-silver quartz veins with somecopper content. They are probably zoned. The Domino, Native Silver, and Big Stick sites areall metallized fractures. Domino contains lead-silver deposition. Ledge prospect and the lowerCox Gulch prospects (fig. 60-61) reportedly contain copper sulfide minerals in veins and/orfractures. Denver Mine and nearby prospects (fig. 62) encompass quartz veins with copper.Metallization most commonly encountered at the sites is silver-chloride, or oxidizedmanganese-and-silver minerals in fault zones. Palmetto Mine and Denver Mine are the onlysizeable workings; both are very weakly metallized.44There is no evidence of economicIIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIImetallization at those mines or any of the others (C. E. Ellis, USBM, written commun., 1994).These sites are described in more detail in appendix A, p. A56-A60.Southern group (fig. 55, 63-64)The southern group of sites includes the lead-silver quartz veins and/or siliceous brecciazones at the National (fig. 55) and Isabella mines (fig. 55, 63), and at unnamed prospectPA708-715 (fig. 29). Also in this group are quartz veins once prospected for supergeneenrichment of silver and gold at Shamrock Mine (fig. 55, 64), and a vein at the Jabalinaprospect (fig. 55), where a USBM high-grade sample contains appreciable lead, silver,manganese, copper, and gold.The only documented production from any of these sites is roughly 600 st of ore fromthe National Mine. Metallic content in one Jabalina prospect sample is interesting, particularlyfor gold, even though it is from a high-grade sample (PA626, 8 ppm Au, or 0.23 oz Au/st,appendix C). A 9-ft-wide zone reportedly was mined there. USBM personnel found noevidence that such a wide structure exists at the site (C. E. Ellis, USBM, written commun.,1994). Data in literature suggest that the mined zones at Isabella and Shamrock are far toonarrow to consider mining in the future. Samples from Shamrock Mine excavations provideno evidence of supergene enrichment of gold or silver. Sites are described in more detail inappendix A, p. A92-A94.Placer gold depositsQuaternary gravels have been worked for placer gold at six or seven individual sitesin the Patagonia Mountains part of Coronado National Forest and at one site adjacent to butoutside the National Forest boundary (pl. 1). Sites are historically divided into two groups:1) the Patagonia or Mowry placers; and 2) the Harshaw district placers. More recentlydeveloped sites are the placer in San Antonio Canyon and the Paradise Canyon Mine.Composite production has been small and precise documentation of production and mininghistory is sparse. Less than 35 oz gold production has been documented, though a hundredor more oz may have been recovered over the years. At least one placer site on the Forestwas active in 1990 (San Antonio Canyon placer, pl. 1). The Paradise Canyon placer mine (pl.1 ) is the only other known placer site that was explored in recent years for gold. An attemptwas made there to reach the alluvium-bedrock contact through a shaft. It is not known if thecontact was reached. The site was active in the mid-1970's, but the shaft was flooded by1983 (ADMMR files).Considering the placers collectively, most of the historical mining took place in the1870's (apparently), and in 1906, 1909, and the 1930's. Several gold sources for the placerscan be surmised. The Patagonia-Mowry placers may have concentrated gold from the part45

of the Jackalo-Paymaster vein or other veins on Guajolote flat (fig. 50, 52, pl. 1), or from theMowry fault or the Mowry Mine manganese-silver deposit (fig. 38). Gold in the Harshawdistrict placers may have been derived from Trench camp area metalliferous structures andpossibly the deposit at the Flux Mine (fig. 3). San Antonio Canyon and Paradise Canyonplacers gold probably came from metallization at Washington Camp/Duquesne Camp (fig. 30).More details on most of these placer sites is in appendix A (p. A119, A128, A130, A136).EconomicsThe Patagonia Mountains area is not rich in primary gold mineralization. Compositeproduction, which was derived mainly from byproduct gold recovery through smelting basemetalores, is less than 12,000 oz gold over the more than 350-year history of mining in themountain range. At least three of the time periods in which placering was attemptedhistorically were driven by unusual economic conditions. The 1906 work at the Patagoniaplacers was driven by loss of the Iocalhardrock mine at Mowry. Mining in 1933 was likelydriven by the Great Depression, as was most U.S. gold mining during that time. The increaseof the price of gold to $35/oz in 1934 caused a significant increase in gold production, nationwide(Koschmann and Bergenthal, 1968, p. 6). The late 1970's work at Paradise Canyonplacers was likely motivated by unprecedented increases in the price of gold during highinflationary years. These geologic and historical economic circumstances suggest that no richplacers have been mined to date or are present in the area.Key data that are lacking for economic assessment are estimates of the thickness andtonnage of gravels available, and the grade of the placers. Gold in the amount ofapproximately $4.00/cu yd of gravels is, in general, required for placer mines to be profitable.Even if gold concentration at the Patagonia/Mowry placers is near the economic break-evenpoint, the lack of water seriously complicates the situation. No complete assessment can bemade with the lack of data on tonnage and grade. It would appear, however, that theHarshaw district placers, outside the National Forest, would be preferable mining targetscompared to the Patagonia/Mowry, San Antonio, or Paradise Canyon placers due to thepresence of larger and more constant water sources in Sonoita Creek and Alum Gulch. Noneof the placers were examined or sampled by USBM. No quantitative economic assessmentis made.Rock productsGravel resources present in the Patagonia Mountains were mined at several localitiesfor USDA, Forest Service use in the maintenance of local Forest roads and construction ofParker Dam (pl. 1 ). Local, private demand for gravel is met by sources outside of the NationalForest boundary (J. R. Thompson, USBM, 1993, written commun.). Forest Service district46IIIIIIIIIIIIIIIIIII

!IIII!!IIII!!II!!!!!!offices already have data concerning sites of past gravel production, so no attempt is madehere to retrieve and reproduce those data.The south-central part of the Patagonia Mountains-Canelo Hills Unit is dominantlyalluvial and colluvial material; the westernmost margin of the Unit is similarly covered indetritus.It is within those areas that gravel and sand deposits are most likely to be found.The lower part of Parker Canyon stream channel (unexamined), for about 4.5 mi northeast ofthe U.S.-Mexico border (pl. 1 ), is apparently the site in the Unit with the largest collection ofalluvial material. No data are known about the characteristics of that material.Construction of rock fill structures, road metal, and fill are three of the most likelyapplications of any future production of alluvium from the Patagonia Mountains-Canelo HillsUnit. Applicability in more sophisticated uses, such as concrete aggregate, is less likely tooccur.This is based on the fact that volcanic rocks comprise much of the terrain, andvolcanic rock products are notoriously reactive with cement. Ensuing chemical reactions oftenmake a short-lived, fast-deteriorating concrete product.Aluminum depositsAlunite, a hydrous sulfate of aluminum and potassium [KAI3(SO4)2(OH)6], formed mainlyas a hydrothermal replacement of primary feldspars (mainly orthoclase) in volcanic rocks inthe Patagonia Mountains, though in other regions, the mineral more often forms as hypogeneveins near volcanic vents (Patterson and Dyni, 1973, p. 39; Hall, 1982, p. 148-150).One alunite deposit and four alunite occurrences in the Patagonia Mountains representstrategic sources of aluminum with possible byproducts of potassium (as K2SO4 for fertilizers)and sulfuric acid (H2SO4) (Hall, 1982, p. 150). However, market conditions dictate it is highlyunlikely that any exploration or development of these sites will take place in the near future.Currently (1994)-in the U.S., alunite is in near-total disuse; Patagonia Mountains alunite wouldnot be mined in the foreseeable future for aluminum, mainly because of the insurmountableeconomic competition offered by aluminum that is recovered from bauxite deposits. This isthe case, even though the U.S. is deficient in bauxite 22 (Hall, 1982, p. 150) and currentlyhas no domestic mine production of aluminum (Plunkert, 1992, p. 20). In addition to the lackof economically competitive recovery processes, alunite is also at a disadvantage due to itslower alumina (AI203) content than bauxite. Pure alunite can contain as much as 37% AI203,in comparison to the 45% to 50% A!203 in typically mined bauxites. The disparity increaseswhen it is considered that a typical alunite deposit is 30% alunite, and thus only 11% AI20322 U.S. bauxite reserves are limited to 40 million st in deposits in Arkansas. Overall domestic resources in the range of 250million st to 300 million st are postulated. The other sites in the U.S. besides Arkansas, in which bauxite has been minedhistorically are Eufaula, AL, and Andersonville, GA. The potential resources are in Hawaii, Washington, and Oregon (Pattersonand Dyni, 1973, p. 38-39).47

(Schrader, 1913, p. 754; Hall, 1982, p. 150).However, bauxites that contain as little as35% AI203 are mined as aluminum ores in places, such as Australia (Patterson and Dyni,1973, p. 38).Alunite sites in the Patagonia Mountains represent a strategic resource that couldexperience exploration and development in the distant future, should the technologies ofrecovery of aluminum from alunite become more economically competitive or should theunlikely event of an emergency supply disruption occur 23.The alunite deposits and occurrencesRed MountainThe hydrothermal alteration zone above the Red Mountain copper-porphyry deposit isthe only known delineated (partially) alunite deposit in the Patagonia Mountains. It is exposedat the topographic surface. The site contains at least 200 million st of alunitic rock; reportedalunite content varies. Spot sampling by Hall (1978, p. A14) led to an estimate of 25%alunite, but a publication by Corn (1975, p. 1,442) reports alunite content that seldomexceeds 10% to 15%.In addition to uncertainties about grade, a detailed mineralogicalcharacterization is needed for assessment. Alunite "ore" gangue should be limited primarilyto microcrystalline quartz, which is largely insoluble. Deleterious minerals that can occur asgangue are the caustic-soluble ones, such as cristobalite and clays and mica (phyllosilicates).Deposits with these minerals should be avoided because they cause breakdown of the caustic-soda leach used in the modified Bayer recovery process, currently (1994) the most proficientrecovery technology. The presence of caustic-soluble minerals also contributes to aluminaloss (Hall, 1982, p. 151-152).known.No geologic map of the Red Mountain alunite deposit isEconomics.--Characterization of necessary parameters for an alunite deposit (Hall,1982, p. 150) show that the Red Mountain alunite deposit is large enough (it exceeds 89million st) for consideration, but it is too low in grade to be considered economic.Three-R alunite occurrenceThe large alunitized alteration zone slightly south of the Three R Mine, mapped bySimons (1974, map), is shown on fig. 3 of this report. Pink-colored alunite was discoveredin 1909 in the granite porphyry that forms wallrock of the Three R chalcocite (copper) shearzone deposit (Schrader, 1913, p. 752-754; Schrader, 1914, p. 347-350). The occurrenceis unusual because it is in intrusive, rather than volcanic rock. Dimensions of the zone were~ The nearest North American, non-domestic sources of alunite are the readily-minable deposits in Canada, which reportedlyare very large (J. R. Thompson, USBM, 1993, written commun.; source not documented by researcher}.48IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIInot measured by early geologists in the area, and no field assessment was undertaken byUSBM. A rough estimate of alunite content was made at 30% (Schrader, 1913, p. 755).That estimate could be too high, noting that pink coloration of alunite denotes an impureoccurrence (Phillips, 1987, p. 2).Economics.--Little can be definitely stated, lacking any tonnage estimates or measuredgrades. The alunitized area on fig. 3 is that in which it would be logical to explore for alunitedeposits, should exploration be deemed judicious. The Three R occurrence is immediatelynorth of that mapped alunitized zone, at the Colossus adit. It is likely that, if any PatagoniaMountains alunite is examined for aluminum resources, the work would preferentially focuson the Red Mountain deposit, because of its size.Other alunite occurrencesThe other three alunite occurrences are in the northeast part of the PatagoniaMountains (pl. 1), at Kunde Mountain, Saddle Mountain, and North Saddle Mountain (Hall,1978, p. A14). These sites were not examined by USBM. A little information about pastexploration of the Kunde Mountain site is known and reported in appendix A (p. A14). Nodata are known concerning the other two sites. No geologic maps are known by the authorand no tonnage or grade estimates can be made because of the data voids.Conclusions about aluniteRecovery of aluminum from alunite is technically possible. During the 1960"s, theU.S.S.R. established, in Azerbaijan, the world's first operating plant to recover aluminum fromalunite. The motivation was mineral self-sufficiency more than economics. The U.S. hadearlier considered production of aluminum (and byproduct potassium sulfate) from aluniteduring anticipated World War II supply problems; work reached the pilot-plant stage.Previously, in World War I, the U.S. briefly obtained an emergency supply of potassium sulfatefertilizer from alunite (Patterson and Dyni, 1973, p. 39; Hail, 1982, p. 150). If the mineralogyof the Patagonia Mountains alunites is suitable, the technology is available that could beapplied to recovery of aluminum from them. But competition from other deposits remains.The Wah Wah Mountains deposits, 75 mi. northwest of Cedar City, Beaver Co., UT, whichwere discovered and drilled extensively in 1971, are larger, of better grade, and estimatedwith greater assurance than the Red Mountain deposit. Wah Wah Mountains deposits (thereare four) each comprise 100 million st, and grades are 35% to 45% alunite. Testing foreconomic recoverability had not been done at last report (Patterson and Dyni, 1973, p. 39).49

Energy resources[a section by John R. Thompson]Sedimentary rocks in the Patagonia Mountains and Canelo Hills have been classifiedas prospectively valuable for oil and gas because they are in a hypothetical "overthrust belt",which may conceal hydrocarbon reservoirs at great depth. Many wells were drilled insouthern Arizona, but none encountered oil or convincing evidence for regional overthrusts(Nations and others, 1989, p. 806). Of those wells, two were drilled in Santa Cruz County;both to the north of the Patagonia Mountains-Canelo Hills Unit. The 1,115-ft hole drilled in1921 penetrated Tertiary-age sediments and the 3,394-ft hole drilled in 1943 penetratedCretaceous-age sediments. Both holes were dry (Peirce and others, 1970). A very deep holedrilled near Tombstone, AZ (10,561-ft) in the early 1980's supplies favorable data related tohypothetical regional overthrust faulting. That hole penetrated Cretaceous-age rocks butpassed through older rocks higher in the hole, suggesting that thrust faulting had occurred.No detailed descriptions of the encountered faulting were released (Peirce, 1982, p. 5).There are several springs in the Patagonia Mountains-Canelo Hills Unit, but none areknown to be geothermal sources. A NURE (National Uranium Resource Evaluation) studyincluded the entire Patagonia Mountains-Canelo Hills Unit (Luning and Brouillard, 1982). Nouranium resources were delineated as a result.CONCLUSIONSCopper-porphyry and breccia-pipe deposits in the Patagonia Mountains are, as definedwith limited available data, of comparable grade and tonnage to similar sulfide deposits minedcurrently (1994)in the region, but the known Patagonia Mountains deposits (Red Mountain,Three-R, Ventura) are too deeply buried for development by traditionally employed open-pitmining methods. For these deposits to be mined economically with underground methodswould require a large, heretofore unseen, elevation of the price of copper. For developmentof these sites by in-situ leaching of the copper would require a large improvement over thecurrently (1994) attainable recoveries of copper from sulfide deposits in virgin ground. Noneof the deposits have been mined. Four Metals Hill (Red Hill) copper-porphyry deposit, also inthe Patagonia Mountains, is shallow, but, based on limited data available to USBM, is toosmall to be developed economically via open-pit mining methods. Unavailable industry datamay prove a more favorable tonnage or grade situation at the deposit. Future industryexploration and possibly deposit development will take place at some of these copperdeposits, but likely in the distant future, at a time when mining technologies are improved andthe value of copper is greater. Locations where alteration and other geologic evidencesuggests similar deposits may be discovered are cited. Some are on the Canelo Hill-PatagoniaMountains boundary.50IIIIIIIIIIIIIIIIIIIII

IIIIIIIIIIManganese at the Hardshell manto deposit represents a strategic resource of the metalwhich could be developed to resolve a supply crisis, but is far from being economic due to lowgrade and foreign competition. Other small deposits nearby and at other localities in the Unitare described and quantified. Many may have problematic gangue minerals that interfere withrecovery. Some may be evidence of another, concealed, Hardshell manto-like deposit.Base- and precious-metal vein deposits, historically the economic base of mining in thisarea, are unlikely to see future development due to low tonnages, the removal of high-graderock by previous operations, and general low gold concentrations. Several sites are discussedconcerning the remote possibility that some higher-grade gold zones may be present. Evenif found, the tonnages would likely be too low to encourage new mining. However, there maybe periodic future attempts to find massive-sulfide metalliferous zones associated with someof the vein deposits.Alunite sources and possible sources are located. They represent possible futurestrategic resources of aluminum, but only in the event of supply disruption to U.S. imports ofbauxite. Few data are available to quantify the placer gold deposition on the western andeastern peripheries of the Patagonia Mountains; rich placers are unlikely. The lack of waterwill inhibit development even if good grades can be shown through additional exploration.Little data are known concerning rock products, primarily gravel. No data are known tosuggest energy resources are present in the Unit.51

REFERENCES CITED 24Definition of AGDC: Anaconda Geological Document Collection, Internstional Archive ofEconomic Geology, American Heritage Center, Univ. of Wyoming, Laramie.Definition of ADfVlMR: Arizona Department of Mines and Mineral Resources, Phoenix, AZ.AGDC, no date, unpub, geologic map of the Four Metals Hill copper porphyry deposit:AGDC, document 8047, total pages not recorded.AGDC, 1954(?), unpub, geologic data concerning exploration of the Four Metals Hillcopper porphyry deposit by Duval Sulfur and Potash Co. (exact title not recorded byresearcher): AGDC, document 8040, total pages not recorded.AGDC, 1957, Fernando Tunnel, Bender Group No. 10 claim of Marstellar Group, Santa CruzCounty, Arizona: Anaconda Geological Document Collection, American HeritageCenter-Univ. of Wyoming, unpub, map, documentno. 131314, scale1" to 50'. (usedon map, fig. 37)AGDC, 1958, Surface geology-assay map, Lookout claim group, Palmetto Mining district,Santa Cruz County, Arizona: AGDCdocumentno. 8111 1 in. to8mi-scalemap, 1p.AGDC, 1967, unpub., untitled Kerr-McGee Corp. Mineral Exploration Dept. map of theThunder Mountain area, compiled on April 1963 base map: AGDC, document 8934,scale: 1 in. to 500 ft.Anderson, C. A., 1966, Areal geology of the southwest, in Titley, S. R., and Hicks,C. L., eds., Geology of the copper porphyry deposits, southwestern NorthAmerica: Univ. of Arizona Press, Tucson, AZ, p. 3-16.Arbiter, Nathaniel, and Fletcher, A. W., 1994, Copper hydrometallurgy - evolution andprocess: Mining Engineering, February 1994, p. 118-122.Barter, C. F., and Kelly, J. L., 1982, Geology of the Twin Buttes mineral deposit: Pima miningdistrict, Pima County, Arizona, section 20 in Titley, S. R., ed., Advances in geologyof the porphyry copper deposits, southwestern North America: Univ. of Arizona Press,Tucson, AZ, p. 407-432.z4 Includes citations in appendixes and on figures.52IIIIIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIII!REFERENCES CITED--contin.Bell, J. E., 1940a, The J. D. Kirkpatrick manganese prospect, near Patagonia, Arizona;Report no. 3048, strategic mineral examination section: U.S. Bureau of Mines MineralProperty File 04-41.219, unpub., Intermountain Field Operations Center, P.O. Box25086, Denver, CO 80225-0086, 3 p.Bell, J. E., 1940b, The R. L. McKenney manganese prospect near Patagonia, Arizona: U.S.Bureau of Mines Strategic Minerals Section Report No. 3046, 4 p., 1 pl.Brooke, G. L., 1965, Rubarb Group, Santa Cruz Co., Arizona: unpub, interofficecorrespondence of Continental Materials Corp." ADMMR files, Line Boy Mine file,Phoenix., AZ, 2 p.Chapman, T. L., 1944, 3 "R" Mine, U.S. Bureau of Mines summary report of War MineralsExamination: U.S. Bureau of Mines Mineral Property File 463.2/14143, IntermountainField Operations Center, P. O. Box 25086, Denver, CO, 80225-0086, 2 p.Corn, R. M., 1975, Alteration-mineralization zoning, Red Mountain, Arizona:Geology, v. 70, p. 1437-1447.EconomicCourtwright, J. H., and Richard, K. E., 1951, Portion of Harshaw District, Santa CruzCounty, Arizona, areal geology: unpub, geologic map of American Smelting andRefining Co. from AGDC, document no. 123605.01, scale: 1 in. to 500 ft.Dale, V. B., Stewart, L. A., and McKinney, W. A., 1960, Tungsten deposits of Cochise,Pima, and Santa Cruz Counties, Ariz.: U.S. Bureau of Mines Report of InvestigationsR.I. 5650, 132 p.Davis, S. R., 1977, Deep mineral zoning in the Ventura (Noranda) property, Santa CruzCounty, Arizona: unpub. ASARCO, Inc., Southwestern Exploration Division, Tucson,AZ report, 12 p., 1 pl., 3 attachments.Dean, R. S., Leaver, E. S., and Joseph, T. L., 1934, Manganese: its occurrence, milling, andmetallurgy, pt. II1: U.S. Bureau of Mines Information Circular IC 6770, p. 167-189.Drewes, Harald, 1980, Tectonic map of southeast Arizona: U.S Geological SurveyMiscellaneous Investigations Series Map I-1109, scale 1 : 125,000.Einaudi, M. T., 1982, Description of skarns associated with porphyry copper plutons:southwestern North America, in Titley, S. R., ed, Advances in Geology of the PorphyryCopper Deposits, southwestern North America: University of Arizona Press, Arizona,p. 139-183.Elsing, M. J., and Griswold, W. T., 1951, DMA-1218-Coronado Mines, Inc. (copper),Patagonia mining district, Santa Cruz County, Arizona: Defense MineralsAdministration Report of Examination by Field Team, Region IV, 27 p. 2 fig.53

REFERENCES CITED--contin.Farnham, L. L., 1953, The Red Mountain copper deposit, Patagonia Mountains miningdistrict, Santa Cruz County, Arizona" U.S. Bureau of Mines DMEA Project 324,Supplemental Examination Report, 19 p., 11 fig., confidential appendix.Farnham L. L., 1957a, Summary report of minerals examination--Black Eagle: unpub. USBMfile data, Intermountain Field Operations Center, P.O. Box 25086, Denver, CO, 80225-OO86, 3 p.Farnham, L. L., 1957b, Blue Bird (authorization 3234 appraisal of manganese deposits inregionlll): U.S. Bureau of Mines unpublished file data, lntermountain Field OperationsCenter, P.O. Box 25086, Denver, CO, 80225-0086, 1 p.Farnham, L. L., Stewart, L. A., and DeLong, C. W., 1961, Manganese deposits of easternArizona: U.S. Bureau of Mines Information Circular 7990, 178 p.Freshman, W. C., 1947, Unpublished geologic assessment in the "Four Metals" files:AGDC, document 8046.03, 5 p.Graybeal, F. T., 1984, Metal zoning in the Patagonia Mountains, Arizona, in Wilkins,Joe, Jr., ed., Gold and silver deposits of the Basin and Range Province, westernU.S.A.: Arizona Geological Society Digest, vol. 15, p. 187-197.Hall, R. B., 1978, World nonbauxite aluminum resources- alunite: U.S. Geological SurveyProfessional Paper 1076-A, 35 p.Hall, R. B., 1982, Model for hydrothermal alunite deposits, in Erickson, R. L., compiler,Characteristics of mineral deposit occurrences: U .S. Geological Survey Open-file report82-795, p. 148-154.Handverger, P. A., 1963, Geology of the Three R Mine, Palmetto Mining District, Santa CruzCounty, Arizona: University of Arizona M.S. thesis, 70 p.Jansen, L. J., 1982, Stratigraphy and structure of the Mission copper deposit: Pimamining district, Pima County, Arizona, section 22 in Titley, S. R., ed., Advances ingeology of the porphyry copper deposits, southwestern North America: Univ. ofArizona Press, Tucson, AZ, p. 467-474.Johnson, A. L., 1963, Four Metals Mine: Arizona Dep. Mineral Resources Field Engineer'sReport: ADMMR files, Phoenix, AZ, 1 p.Jones, E. L. Jr, and Ransome, F. L., 1920, Deposits of manganese ore in Arizona, inContributions to Economic Geology: U.S. Geological Survey Bulletin 710, p. 93-184.54IIIIIIIIIIIIII,IIIII

IIIIIIIIIIIIIIIiiREFERENCES CITED--contin.Jones, T. S., 1992, Manganese, a ch. in Mineral commodity summaries 1993, p. 108-109.Jones, T. S., 1994, Manganese, a ch. in Mineral commodity summaries 1994, p. 108-109.Julihn, C. E., and Meyer, H. M., 1934, Copper, a ch. in U.S. Bureau of Mines MineralsYearbook 1934, p. 53-77.Kartchner, W. E., 1944, The geology and ore deposits of a portion of the Harshaw District,Patagonia Mountains, Arizona: University of Arizona Ph.D dissertation, 103 p.Keith, S. B., 1975, Index of mining properties in Santa Cruz County, Arizona:Arizona Bureau of Mines Bulletin 191, 94 p.Keith, S. B., Gest, D. E., DeWitt, Ed, Toll N. W., and Everson, B. A., 1983, Metallicmineral districts and production in Arizona: Arizona Bureau of Geology and MineralTechnology Bulletin 194, 58 p.King, J. R., 1982, Geology of the San Xavier North porphyry deposit: Pima miningdistrict, Pima County, Arizona, section 23 in Titley, S. R., ed., Advances in geologyof the porphyry copper deposits, southwestern North America: Univ. of Arizona Press,Tucson, AZ, p. 475-486.Koschmann, A. H., and Bergenthal, M. H., 1968, Principal gold-producing districts of theUnited States: U.S. Geological Survey Professional Paper 610, 283 p.Koutz, F. R., 1984, The Hardshell silver, base-metal, manganese oxide deposit, PatagoniaMountains, Santa Cruz County, Arizona, (a field trip guide): Arizona Geological SocietyDigest v. 15, p. 199-217.Kupfer, D. H., 1965, Santo Nino Mine in Kirkemo, Harold, Anderson, C. A., and Creasy, S.C., Investigations of Molybdenum Deposits of the Conterminous U.S.: U.S. GeologicalSurvey Bulletin 1182-E, p. E14-E16.Laflamme, Marcel, Planeta, Stefan, and Bourgoin, Claude, 1994, Technological aspects ofnarrow vein mining: suggested modifications and new developments; mining of shallowand intermediate dipping (

REFERENCES CITED--contin.Lehman, N. E., 1978, The geology and pyrometasomatic ore deposits of the WashingtonCamp-Duquesne District, Santa Cruz County, Arizona University of Arizona Ph.Ddissertation, 285 p.Lipman, P. W., and Hagstrum, J. T., 1992, Jurassic ash-flow sheets, calderas, and relatedintrusions of the Cordilleran volcanic arc in southeastern Arizona: implications forregional tectonics and ore deposits: Geological Society of America Bulletin, v. 104,p. 32-39.Long, K. R., 1992, Reserves and production data for selected ore deposits in theUnited States found in the files of the Anaconda Copper Company: U.S GeologicalSurvey Open-file Report 92-002, 12(?) p.Luning, R. H. and Brouillard, L. A., 1982, National uranium resource evaluation NogalesQuadrangle, Arizona: U.S. Department of Energy PGJ/F-130(82), 70 p.Marozas, D. C., Paulson, S. E., and Petrie, L. M., 1991, An evaluation of the potential forselective in-situ leach mining of manganese ores: Society for Mining, Metallurgy, andExploration, Inc., Preprint no. 91-177, for presentation at the SME Annual Meeting,Denver, CO, Feb. 25-28, 1991, 16 p.McCaskey, H. D., and Dunlop, J. P., 1919, Gold and silver (general report), a ch. in Mineralresources of the United States 1916, part 1-metals: U.S. Geological Survey, U.S.Government Printing Office, Washington, D. C., p. 679-722.Moger, S. R., 1969, The geology of the west central portion of the Patagonia Mountains,Santa Cruz County, Arizona" University of Arizona M.S. thesis, 60 p.Moores, R. C. II, 1972, The geology and ore deposits of a portion of the Harshaw District,Santa Cruz County, Arizona: University of Arizona M.S. thesis, 98 p.Nations, J. D., Brennan, D. J., and Ybarra, R. A., 1989, Oil and gas in Arizona in GeologicalEvolution of Arizona: Arizona Geological Society Digest, v. 17, P. 795-815.Noble, E. G., Baglin, E. G., Lampshire, D. L., and Eisele, J. A., 1991, Biological leaching ofmanganese ores: paper for presentation at SME Annual Meeting, Denver, CO, Feb. 25-28, 1991, 9 p.Pahlman, J. E., and Khalafalla, S. E., 1988, Leaching of domestic manganese ores withdissolved SO2: U.S. Bureau of Mines Report of Investigations RI 9150, 15 p.Pahlman, J. E., Rhoades, C. A., and Chamberlain, P. G., 1987, Dual leaching method forrecovering silver and manganese from domestic manganiferous silver deposits: U.S.Bureau of Mines Report of Investigations RI 9126, 8 p.56IIIIIiIIIIIIIIIIIII

ill!~i~ I\IIIIIIIIIIIIIIIIREFERENCES CITED--contin.Patterson, S. H., and Dyni, J. R., 1973, Aluminum and bauxite, a ch. in Brobst, D. A., andPratt, W. P., eds., United States mineral resources: U.S. Geological SurveyProfessional Paper 820, p. 35-43.Paydirt, 1970, Kerr-McGee reports copper strike in Patagonia area: Paydirt, no. 375, Sept.28, 1970.Payne, W. D., 1977, Geologic map, Ventura (Noranda) property, Patagonia Mountains, SantaCruz County, Arizona: unpub, map from ASARCO, Inc., Southwestern ExplorationDivision, Tucson, AZ, scale 1 in. to 400 ft.Peirce, H. W., 1982, The search for petroleum in Arizona: Fieldnotes v. 12, No. 2, ArizonaBureau of Geology and Mineral Technology, p. 1-5.Peirce, H. W., Wilt, J. C., and Keith, S. B., 1970, Coal, oil, natural gas, helium, and uraniumin Arizona: Arizona Bureau of Mines Bulletin 182, 289 p.Penny, C. P., 1965, Four Metals, ore reserves: unpub, geologic consultation for NorandaMines, Limited, Canada: USBM Mineral Property File 04-021-106, 2 p., USBM-IFOC,Box 25086, Denver, CO, 80225-0086.Phillips, K. A., 1987, Arizona industrial minerals, 2nd ed.: Arizona Department of Mines andMineral Resources, Phoenix, AZ, 185 p.Phillips, K. A., and Niemuth, N. J., 1993, The primary copper industry of Arizona in1991 : Arizona Department of Mines and Mineral Resources Special Report No.18, 52 p.Pierce, J. C., 1956, Three R Mine: unpub, mine data by one of the joint owners of property,3p.Pierce, J. C., 1979, Three R property, historical addendum to 9-23-56 report: unpub, minedata by property owner, 1 p.Plunkert, P. A., 1992, Aluminum, a ch. in Mineral commodity summaries 1993: U.S. Bureauof Mines, U.S. Government Printing Office, p. 20-21.Quinlan, J. L., 1986, Geology and silicate-alteration zoning at the Red Mountain porphyrycopper deposit, Santa Cruz County, Arizona: Arizona Geological Society Digest, v. 16,p. 294-305.57

REFERENCES CITED--contin.Rampacek, C., Fuller, H. C., and Clemmer, J. B., 1959, Operation of a dithionateprocesspilot test plant for leaching manganese ore from Maggie Canyon deposit,Artillery Mountains region, Mohave County, Arizona: U.S. Bureau of Mines Report ofInvestigations RI5508, 54 p.Richardson Engineering Service, Inc., 1994, The Richardson rapid system; process plantconstruction estimating standards, vol. 1, sitework, piling, concrete: RichardsonEngineering Service, Inc., Mesa, AZ, various non-sequentially numbered pages in looseleafsections.Roberts, G. E., 1904, Gold and silver, a ch. in Mineral resources of the United States,calendar year 1902: U.S. Geological Survey, U.S. Government Printing Office,Washington, D. C., p. 123-132.Romslo, T. M., and Ravitz, S. F., 1947, Arizona manganese-silver ores:Mines Report of Investigations RI 4097, 13 p.U.S. Bureau ofSchmitt, H. A., 1966, The porphyry copper deposits and their regional setting, in Titley,S. R., and Hicks, C. L., eds., Geology of the copper porphyry deposits, southwesternNorth America: Univ. of Arizona Press, Tucson, AZ, p. 17-34.Schrader, F. C., 1913, Alunite in Patagonia, Arizona, and Bovard, Nevada:Geology, v. 8, p. 762-767.EconomicSchrader, F. C., 1914, Alunite in granite porphyry near Patagonia, Arizona: U.S. GeologicalSurvey Bulletin 540, p. 347-350.Schrader, F. C., 1915, Mineral deposits of the Santa Rita and Patagonia Mountains,Arizona: U.S. Geological Survey Bulletin 582, 373 p.Schrader, F. C. and Hill, J. M., 1910, Some occurrences of molybdenite in the SantaRita and Patagonia Mountains, Arizona in Contributions to Economic Geology, Part 1 •U.S. Geological Survey Bulletin 430, p. 154-163.Shepard, J. L., no date, The Presidential Group:document 8045, total pages not recorded.unpub, geologic assessment, AGDC,Simons, F. S., 1974, Geologic map and sections of the Nogales and Lochielquadrangles, Santa Cruz County, Arizona: U.S. Geological Survey Miscellaneous FieldInvestigations Map 1-762, scale 1:48,000.58IIIIIIIIIIIIIIIIIII

!li.IIIIIIItIIIIIIiliREFERENCES CITED--contin.Smith, G. E., 1956, Geology and ore deposits of the Mowry Mine area, Santa Cruz County,Arizona" University of Arizona, M.S thesis, 44 p.Smith, R. C., 1992, PREVAL: Prefeasibility software program for evaluating mineralproperties: U.S. Bureau of Mines Information Circular 9307, 35 p.Stebbins, S. A., 1990, The cost of driving drifts and ramps: Western Mine Engineering, Inc.,Mining Cost Development Series no. 1,4 p.Stebbins, S. A., 1992, The cost of sinking shafts:Mining Cost Development Series no. 5, 6 p.Western Mine Engineering, Inc.,Surles, T. L., 1978, Chemical and thermal variations accompanying formation of garnet skarnsnear Patagonia, Arizona: University of Arizona, M.S. thesis, 54 p.Titley, S. R., 1982, Some features of tectonic history and ore genesis in the Pima miningdistrict: Pima County Arizona, section 19 in Titley, S. R., ed., Advances in geologyof the porphyry copper deposits, southwestern North America: Univ. of Arizona Press,Tucson, AZ, p. 387-406.Townsend, B., and Severs, K. J., 1990, The solvent extraction of copper - a perspective:Mining Magazine, January 1990, p. 26-35.U.S. Bureau of Mines, 1977, Manganese, a ch. in Mineral commodity profiles, October1977, 19 p.U.S. Bureau of Mines staff, compilers, 1987a, Bureau of Mines cost estimating systemhandbook (in two parts) 1. surface and underground mining: U.S. Bureau of MinesInformation Circular IC 9142, 631 p.U.S. Bureau of Mines staff, 1987b, compilers, Bureau of Mines cost estimating systemhandbook (in two parts) 2. mineral processing: U.S. Bureau of Mines InformationCircular IC 9143, 566 p.West, R. J., and Aiken, D. Mo, 1982, Geology of the Sierrita-Esperanza deposit: PimaCounty, Arizona, section 21 in Titley, S. R., ed., Advances in geology of the porphyrycopper deposits, southwestern North America: Univ. of Arizona Press, Tucson, AZ,p. 433-466.Western Mine Engineering, Inc., 1993, Mining cost service: Western Mine Engineering, Inc.,Spokane, Washington, various non-sequentially numbered, loose-leaf pages in sections.59

BIBLIOGRAPHYLiterature concerning Patagonia Mountains-Canelo Hills Unit not cited in this USBM report.Baker, R. C., 1961, The geology and ore deposits of the southeast portion of the PatagoniaMountains, Arizona: University of Michigan, Ph. D. dissertation, 284 p.IIIIIIIIIIIIIIIIIIIIIIII|!Bodnar, R. J., 1978, Fluid inclusion study of the porphyry copper prospect at Red Mountain,Arizona: University of Arizona, M.S. thesis, 70 p.Bodnar, R. J., and Beane, R. E., 1980, Temporal and spatial variations in hydrothermal fluidcharacteristics during vein filling in preore cover overlying deeply buried porphyrycopper-type mineralization at Red Mountain, Arizona: Economic Geology v. 75, p.876-993.Cetinay, T. H., 1967, The geology of the eastern end of the Canelo Hills, Santa Cruz County,Arizona: University of Arizona, M.S. thesis, 54 p.Chaffee, M. A., Hill, R. H., Sutley, S. J., and Watterson, J. R., 1981, Regional GeochemicalStudies in the Patagonia Mountains, Santa Cruz County, Arizona" Journal ofGeochemical Exploration, v. 14, p. 135-153.Crosby, W. 0., 1906, The limestone-granite contact-deposits of Washington Camp, Arizona:American Institute of Mining Engineers Transactions v. 36, p. 626-646.Denney, P. P., 1968, Geology of the southeast end of the Paleozoic portion of the CaneloHills, Santa Cruz County, Arizona: University of Arizona, M.S. thesis, 106 p.Feth, J. H., 1947, The geology of the northern Canelo Hills, Santa Cruz County Arizona:University of Arizona, Ph.D. dissertation, 150 p.1948, Permian stratigraphy and structure, northern Canelo Hills, Arizona: AmericanAssociation of Petroleum Geologists Bulletin v. 32, No. 1, p. 82-108.Hayes, P. T., Simons, F. S. and Raup, R. B., 1965, Lower Mesozoic extrusive rocks insoutheastern Arizona - the Canelo Hills volcanics: U.S. Geological Survey Bulletin1194-M, 9 p.Kistner, D. J., 1984, Fracture study of a lithocap, Red Mountain porphyry copper prospect,Santa Cruz County, Arizona: University of Arizona M.S. thesis, 75 p. (on microfiche).Kluth, C. F., 1982, The geology and mid-Mesozoic tectonics of the northern Canelo Hills,Santa Cruz County, Arizona: • University of Arizona, Ph.D dissertation, 245 p.Krebs, C. K., and Ruiz, Joaquin, 1987, Geochemistry of the Canelo Hills volcanics andimplications for the Jurassic tectonic setting of southeastern Arizona in Mesozoic rocksof southern Arizona and adjacent areas: Arizona Geological Society Digest v. 18, p.139-151.61

BIBLIOGRAPHY--contin.Literature concerning Patagonia Mountains-Canelo Hills Unit not cited in this USBM report.Lehman, N. E., 1980, Pyrometasomatic deposits of the Washington Camp-Duquesne District,Santa Cruz County, Arizona: Mining Engineering, February 1980, p. 181-188.Marvin, R. F., Stern, T. W., Creasey, S. C., and Mehnert, H. H., 1973, Radiometric ages ofigneous rocks from Pima, Santa Cruz, and Cochise Counties, southeastern Arizona:U.S. Geological Survey Bulletin 1379, 27 p.Probert, F. R., 1914, The Three R Mine, Patagonia District, Arizona: Mining and ScientificPress, v. 109, p. 174-176.Prout, J. W., 1907, The silver-lead deposits of the Mowry mine, Mowry, Santa Cruz County,Arizona: University of Arizona, M.S. thesis, 44 p.Schrader, F. C., 1917, The geologic distribution and genesis of the metals in the Santa Rita-Patagonia Mountains, Arizona: Economic Geology, v. 12, p. 237-269.Simons, F. S., Raup, R. B., Hayes, P. T. and Drewes, Harald, 1966, Exotic blocks and coarsebreccias in Mesozoic volcanic rocks of southeastern Arizona: U.S. Geological SurveyProfessional Paper 550-D, p. D12-D22.Simons, F. S., 1972, Mesozoic stratigraphy of the Patagonia Mountains and adjoining areas,Santa Cruz County, Arizona: U.S. Geological Survey Professional Paper 658-E, 23 p.Vidal, J. R., 1971, Geology of an upper Paleozoic sequence in north-central Canelo Hills,Santa Cruz County, Arizona: University of Arizona, M.S. thesis, 54 p.Young, P. C., 1969, Surface geology and soil geochemistry of the Buena Vista mine area,Patagonia Mountains, Santa Cruz County, Arizona: Colorado School of Mines, M.S.thesis, 119 p.IIIIIIIIIIIIIIl62lIII

I ,IIIIIIIIIIIIIIIAPPENDIX ABackground data, detailed historical, geologic, and economic datafor specific mine and/or prospect groupsPATAGONIA MOUNTAINS-CANELO HILLS UNIT(see contents list below for organization of this appendix)CONTENTS OF APPENDIX ASampled mine and prospect sites are placed first in this appendix, listed in order by sample number(s). All sample numbers beginwith a "PA" prefix, denoting they are from the Patagonia Mountains-Canelo Hills Unit of the Coronado National Forest. Followingthe sampled mine and prospect sites, are data on unsampled sites, listed alphabetically. Below are two indices, listedalphabetically (composite of all the sites), and by sample numbers (sampled sites only).ALPHABETICAL LISTINGName Sample nos./fig, nos. Page/location informationAbe Lincoln Minesee Blue Nose MineAlta Mine PA335-338 (fig. 34) p. A47-A48Alum Gulch workings PAl 27-138 (fig. 3) see Exposed Reef Mine, Hampson Mine,Blue Eagle MineAmerican Mine no samples (fig. 3) p. A1G~Annie Mine PA747-749 (fig. 30) p. A96-A103Arizona Mine no samples (fig. 30] p. A96-A103Arroyo Incline no samples {fig. 30} p. A96-A103Augusta Mine PA326-327 (fig. 3, 43) p. A43Aztec Mine group PAl 17-126 (fig. 15-16} p. A24Bacon propertysee Guajolote MineBasin No. 1 prospect PA160-162 (fig. 44} p. A31-A32Belmont MineBender Mine PA343-344 (fig. 34, 37} p. A53-A54Bennett Mine vein PA638-641 (fig. 55-56) p. A76-AB3see South Belmont MineBenton Mine PA753-756 (fig. 27) p. A104-A106Beyerie pit no samples p. A 124-A127Big Lead Mine vein PA628-632 (fig. 55) p. A76-A83Big Stick prospect PA354-355 (fig. 60) p. A56-A60A1

ALPHABETICAL LISTINGName Sample nos./fig, nos. Page/]ocadot~ informationBlack Acesee La Plata MineBlack Eagle Mine PA340 342 (lig 34) p. AB1-A52Black Rose no samples (fig 34) p. Al10Blue Bird claims no samples p A111Blue Eagle Mine no samples (fig. 3) p A25 {see also Exposed Reef Mine, pA25)Blue Nose Mine PA318 324 (fig. 3) p. A42Blue Rock No 8 claim PA42B [fig. 3) p. A61-A69Bob Lee Minesee Robert E Lee Mir/eBonanza Mine PA74B-746 {fig 30-32) p. A96 A103B[ooks prospect no samples (precise location unknown; not p. A96 A103plotted)Buena Vista Mine vein PA646-707 (fig, 47-49) p. A76-A83Bullwacker deposits no samples (fig. 38) p. A124-A127Buffalo group PA146-159 (fig. 44) p. A30California Mine no samples (fig. 30} p. A96-A103California-Grasshopper Mine groupCallahan Lead-Zinc Co., Duquesne UnitChief Mine group PA169-195 [fig. 3, 9) p. A33see Ca]ifornia MineChristmas Gift Mine PA93-96 {fig. 18) p. A21-A22Cox Gulch (lower) prospects PA361-367 (fig. 60-61) p. AB6-A60Cox Gulch {upper} prospects PA467-474 (fig. 3, 11) p. A73Dave Allen Mine no samples (fig. 30) p. A96-A103Deerwater Minesee Washington Camp\Duquesne Camp~ee New York MineDenver Mine and nearby prospects PA479-489 (fig. 62) p. A56-A60Dewey prospect no samples {fig. 44) p, A31-A32Domino Mine group PA356-360 (fig. 60) p. A56-A60Double Standard Mine no samples (fig. 30) p. A96-A103Dudley MineDudley-Standard MineDuquesne CampDuquesne Mine PA752 [fig. 30) p. A96-A103Durham Mine no samples (fig. 20) p. A16-A17Edna Mine group PA716-718 (fig. 29, pl. 1) p. A76-A83Elevation Mine group PA101-105 |fig. 18) p. A21-A22A2see Double Standard Minesee Double Standard Minesee Washington Camp/Duquesne CampIIIIIIIIIIIIIIIiIII

IIIIIIIIIIIIIIIIIIbhbALPHABETICAL LISTINGName Sample nOSo/fig, nos. Page/location informationEmpire Mine no samples (fig. 30) p. A96-A103Endless Chain Mine PA328-331 (fig. 31 p. A44Enterprise Mine PA521-526 (fig. 50-51} p. A76-A83Estella Minesee Estelle MineEstella Mine no samples (fig. 30) p. A96-A103European Mine group PA430-454 (fig. 3, 10) p, A70Exposed Reef Mine PA132 (fig. 3) p. A25 (see also Blue Eagle Mine)Femando propertysee Bender MineFlux Mine PA139-142 (fig. 3, 41) p, A26-A27Four Metals Hill copper porphyry PA542-563 (fig. 23-26) p. A88-A91Four Metals Mine PA542-563 (fig. 23-26} p. A88-A91Frisco Fair claims PA23-34 (fig° 20-21) p. A15Giroux shaftsee Pride-of-the-West MineGladstone Mine vein PA590-596 (fig. 52} p. A76-A83Golden Gate patentsee North Mowry MineGolden Rose Mine vein PA633-635 (fig. 55) p. A76-A83Grasshopper Minesee California MineGray Camp no samples (fig. 60) p. A56-ASOGreat Silver Mine PA163-1 66 (fig. 44} p. A31-A32Gross Gold Vein prospectsee Shamrock MineGross Minesee Jabalina prospectGross prospect PA597-598 (fig. 52) p. A76-A83Guajolote lodesee Four Metals MineGuajolote Mine(?) PA529 (fig. 50) p. A76-A83Ha/st Mine PA530-533 (pl. 1) p. A84Hale prospectsee Meadow Valley MineHale #2 prospect no samples (fig. 19] p. A18-A20Hale #3 prospect PA77-86 (fig. 19) p. A18-A20Hampson Mine PA135-13S (fig. 3| p. A25Happy Thought Mine PA737-744 (fig. 30, 33) p. A96-A103Hardshell Incline Mine no samples (fig. 34-36) p. A113-A114Hardshell manganese-silver manto no samples (fig. 34) p. A115-A118Harshaw district placers no samples (pl. I) p. A11".',Hermosa Mine no samples (fig. 34) p. A120-121A3

NameHidden prospectsHolland MilleHomestake MineHomestake prospectHumbolt Mine (in partlIllinois Mine}ndiana Mine (in part)ALPHABETICAL LISTINGSample nos./fig, nos.PAl06 115 (fig. 17)PA751 (fig 30)PA518-519 (fig. 50)PA88 89 (fig. 19)PA289-305 (fig. 3)no samples (fig. 30)PA726-728 (fig. 30}Page/location informationp A23p. A96 A103p. A76 A83p A18-A20p. A37 A40p. A96-A103p. A96-A103Indianapolis Mine no samples (lig. 30) p. A96-A103Isabella Mine PA606-607 (fig. 55-63) p. A92-A94Jabalina prospect PA624 627 (fig. 55) p. A92-A94Jackalo Mine and nearby excavations PA565-581 (fig. 52-53) p. A76-A83Jackalo-Paymaster vein PA520-528, 564-581 (fig. 50-53) p. A76-A83January MineJadlla MineJarillas MineJ & E claimsJefferson groupno samples (fig. 3}PA503-604 (fig. 59)p. A37-A40p. A56-A60see Jarilla Minesee Poftywog claimssee Buffalo groupJonson Camp fig. 20 see New York (Jensen Minel, LampshireMine, Unnamed workings PA35-59Josephine MineJulio claimsJustice(?) mineral patentKansas Mineno samples (pl. 1)PA719-723 (fig. 30)see Trench Mine (Josephine shaft]see Edna Mine groupp. A104-AI06p. A96-A103King Mine vein PA642-645 (fig. 47) p, A76-A83Kirkpatrick, J. D., manganese prospectKunde Mountain a~teration areaLampshire MineLa Plata MineLead Queen MineLedge prospectno samples (pL 1)PA65-66 [fig. 20)PA70-76 (fig. 19)PA147-159 (fig. 44)no samples (fig. 60)Line Boy Mine PA757-788 (fig. 27)Lookout claimsLouise MineMaine Mine (in part)no samples (fig. 30)PA729-735 (fig. 30}A4see Unnamed prospects PA312-317p. A14p. A16-A17p. A18-A20p. A30p. A66-A60p. AIO4-A10Bsee Domino Mine groupp. A96-A103p. A96-A103IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIALPHABETICAL LISTINGName Sample nos./fig, nos. Page/location informationManzanita Mine no samples (fig. 30] p. A96-A103Marche prospect no samples (pl. 1) p. A76-AS3Martha Washington claimMaw Cane adit PA346-350 (fig. 42, 60) p. A55see Edna Mine groupMaw Jane Mine no samples (fig. 30} p. A96-A103McKenney, R. L., prospect no samples (pl. 1 ) p. A122-A123Meadow Valley drill sites no samples (fig. 191 p. A 18-A20Meadow Valley Mine PA87 (fig. 19) p. A18-A20Minnesota Mine veins PA599-601 (fig. 52, 54) p. A76-A83Morning Glow Mine PA332-334 (fig. 3) p. A45-A46Mowry Mine no samples (fig. 38-39) p. A124-A127Mow W placersNational Mine PA603-605 (fig. 55) p. A92-A94Native Silver prospect PA352-353 (fig. 60) p. A56-A60New York Mine (in part) PA724-725 (fig. 30) p. A96-A103New York (Jensen) Mine PA60-64 (fig. 20) p. A16-A17North Belmont Mine no samples (fig. 30) p. A96-A103North Moww Mine no samples (fig. 38) p. A124-A127Norton Minesee Patagonia or Moww placerssee Red Bird MineO'Conner prospect no samples (precise location not known; p. A96-A103not plotted)Old Chief MineOld Mowry MineOld Soldier MineOld Timer Mine PA505-506 (fig. 59)Olive Mine PA534-535 (pl. 1}O'Mara Mine and associated prospects PA507-514 (fig. 57-58)O'Maras Mine"original" Trench Mine no samples (fig. 3}Padrez MinePalmetto Mine PA497-502 (fig. 59)Panama edit (prospect} PA196-208 (fig. 3, 65)Paradise Canyon Mine no samples (pl. 1)Parker Canyon workings no samples (pl. 1)A5see Domino Mine groupsee North Mowry Minesee O'Mara Minep. A56-A60p. A85p. A76-83see O'Mara Minep. A37-A40see January Minep. A56-A60p. A34p. A128p. A129

ALPHABETICAL LISTINGName Sample nos.lfig, nos. Pagellocalion informationPatagonia Minesee Mowry MinePatagoflia or Mowry placers no sarnples (pl. 1) p A130-A131Paymaster Mine PA527 528 (fig. 50) p. A76-A83Phoenix claims no samples Ipl 1) p. A132Pocahontas Mine no samples (fig. 30) p, A96-A103Pollywog claims no setup]as (pl 1) p. A133Poole groupPresidential groupPride MinePride-of-the-West Mine no samples (fig. 30) p. A96-103Pronto Mine vein PA582-589 (fig. 52) p. A76-A83Quajolate Minesee Indiana Mine, New York Mine, andKansas Minesee Four Metals Hill copper porphyrysee Pride of-the-West Minesee Guajolote MineRed Bank well drill site no samples (fig. 20) p. A16-A17Red Bird Mine no samples Ifig. 3) p. A37-A40Red Hill copper porphyry depositRed Mountain copper depositRed Mountain copper-porphyry/breccia no samples (fig. 14) p. A134-A135pipe depositRed Mountain Minesee Four Metals Hill copper porphyrysee Four Metals Hill copper porphyrysee Four Metals MineRed Rock prospect(?) PA167-168 (fig. 44} p. A31-A32Robert E. Lee Mine PA493-496 (fig. 59) p. A56-A60Salvador Mine PA339 {fig. 34) p. A49-ASOSan Antonio Canyon placer no samples p. A136San Antonio Mine no samples (~ig. 301 p. A96-A103San Ramon Mine no samples (fig. 30; precise location not p. A96-A103known or plotted)Sansimon Mine & nearby prospects PA5-15 (fig. 22} p. A14Santo Nino Mine no samples (fig. 28, pl. 1) p. A104-A106Serenata Minesee Isabella MineShamrock Mine PA608-621 (fig. 55, 64) p. A92-A94Silver Bell Mine no samples (fig. 30} p. A96-A103Silver Bill MineSimplot Minesee Silver Bell Minesee New York MineSmuggler Mine no samples (fig. 30) p. A96-A103A6IIIIIIIIIIIIIIIIIiI

IIALPHABETICAL LISTINGName Sample nos./fig, nos. Page/location informationSonoita Mine PA490-492 (fig. 59) p. A56-A60South Belmont Mine no samples (fig. 30} p. A96-A103Specularite prospect PA636-637 {fig. 55) p. A76-A83Standard(?) prospect and surrounding area PA259-272 (fig. 3, 13) p. A35-A36Sulphide prospect PA68-69 (pl. 11 p. A 18-A20Sunnyside Mine area PA224-256 (fig. 3, 12l p. A35-A36Sunshine Minesee Paradise Canyon MineIIIIIIIIIITexas Mine no samples (fig. 30) p. A96-A103Three R Mine group PA368-428 (fig. 3-6) p. A61 -A69iThunder prospect and surrounding area I PA273-288 (fig. 3. 13) p. A35-A36iiTibbetts Mine no samples (fig. 30) , p. A96-A103iTrench Mine (Josephine shaft) no samples (fig. 30) p. A37-A40iiTres de Mayo group PA497-502 (fig. 59) p. A56-A60Uncle George Mineiiiisee Red Bird MineUnnamed fault PA515 (fig. 50) p. A76-AB3iUnnamed manganese prospect PA759-762 (pl. 1) p. A107iUnnamed prospect PA209-210 PA209-210 (fig. 3) p. A35-A36Unnamed prospect PA2B7-2BS PA257-258 (fig. 3) p. A35-A36Unnamed prospect PA536-538 PA536-538 (pl. 1) p. A86iUnnamed prospect PA708-715 PA70B-715 (fig. 29) p. A92-A94iUnnamed prospects PA306-311 PA306-311 (fig. 3) p. A37-A40iUnnamed prospects PA312-317 PA312-317 (fig. 3, 40} p. A41iUnnamed prospect in breccia pipe PA211- PA211-223 (fig. 3, 7} p. A35-A36223iiUnnamed prospect in breccia pipe PA4SS- PA4SS-463 (fig. 3, 8] p. A71463iiUnnamed quartz vein PA516-517 (fig. 50) p. A76-AB3iUnnamed structure PA579 (fig. 52) p. A76-A83iUnnamed workings PA35-59 PA35-59 (fig. 20-21) p. A16-A17iVentura copper-moly breccia pipe no samples (fig. 3) p. A137-A138iVentura copper-porphyry no samples (fig. 3) p. A139iVentura Mine (in part) PA464-466 (fig. 3) p. A72iVictor claim(D, D.) Walsh propertyiiiisee Isabella MineWashington Camp/Duquesne Camp PA719-752 (fig. 30-33) p. A96-A103isee Paradise Canyon MineA7Ii

IIIIIIIIIIIIIIINUMERICAL-ORDER LISTING, BY SAMPLE NUMBERS COLLECTED AT SITERange of sample nos. Site name Page/location informationPA5-1S Sansimnn Mine and nearby prospects p. A14PA23-34 Frisco Fair claims p. A15PA35-B9 Unnamed workings p. A16-A17PA60-64 New York (Jensen) Mine p. A16-A17PA65-66 Lampshire Mine p. A 16-A ~ 7PA68-69 Sulphide prospect p. A18-A20PA70-76 La Plata Mine p. A18-A20PA77-86 Hale #3 prospect p. A18-A20PA87 Meadow Valley Mine p. A18-A20PA88-B9 Homestake prospect p. A18-A20PA90-92 Unnamed workings; possibly part of p. A21-A22Christmas Gift or Elevation groupPA93-96 Christmas Gift Mine p. A21-A22PA97-100 Unnamed workings; possibly part of p. A21-A22Christmas Gift or Elevation groupPA101-105 Elevation Mine group p. A21-A22PAl 06-115 Hidden prospects p. A23PAl 17-126 Aztec Mine group (fig. 15-16) p. A24PAl 27-131 Name of group is uncertain; see Blue Eagle p. A25Mine, Exposed Reef MinePA132 Exposed Reef Mine p. A25PAl 33-134 Name of workings is uncertain; see Blue p. A25Eagle Mine, Exposed Reef MinePAl 35-138 Hampson Mine p. A25PAl 39-142 Flux Mine p. A26-A27PA143-145 World's Fair Mine p. A28-A29PA146-159 Buffalo group [incl. Lead Queen Mine) p. A30PAl 60-168 Wieland group, includes Basin No. 1 p. A31-A32prospect, Dewey prospect, Great SilverMine, Red Rock[?) prospectPA169-195 Chief Mine group p. A33PA196-208 Panama adit p. A34PA209-210 Unnamed prospect p. A35-A36PA211-223 Unnamed prospect in breccia pipe p. A35-A36PA224-256 Sunnyside mine area p. A35-A36PA257-25B Unnamed prospect p. A35-A36A9

NUMERICAL ORDER LISTING, BY SAMPLE NUMBERS COLLECTED AT SITERange of sample nos. Site name Page/location informationPA259-272 Standard(?} prospect a~d surrounding area p A35 A36F'A273 288 Thunder prospect and surrounding area p A35 A36PA289-305 Humbolt Mine p. A37 A40PA306 311 Unnamed prospects p. A37-A40PA312 31 7 Unnamed prospects p A41PA318-324 Blue Nose Mine p A42PA326-327 Augusta Mine p. A43PA328-331 Endless Chain Mine p. A44PA332-334 Morning Glory Mine p A45-A46PA335-338 Alta Mine p A47 A48PA339 Salvador Mine p A49-AB0PA340 342 Black Eagle Mine p. AS1-A52PA343-344 Bender Mine p. A53-A54PA346-350 Mary Cane adit p. A55PA351 Unnamed prospect p. A55PA352-353 Native Silver prospect p. A5B-A6OPA354-355 Big Stick prospect p. A56-A60PA356-360 Domino Mine group (Lookout Mine) p. AB6-A60PA361-367 Cox Gulch IIower) prospects p. A56-A60PA368-428 Three R Mine group (Three R Mine, West p. A61-A69Side Mine, Blue Rock No. 8 claim)PA430-454 European Mine group p. AT0PA455-463 Unnamed prospect in breccia pipe p. A71PA464-466 Ventura Mine (in part} p. A72PA467-474 Cox Gulch (upper) prospects p. A73PA475-478 Zinc Adit group p. A74PA479-489 Denver Mine and nearby prospects p. A56-A60PA490-492 Sonoita Mine p. AB6-A60PA493-496 Robert E. Lee Mine p. A56-AB0PA497-502 Palmetto Mine (Tres de Mayo group} p. A56-A60PA503-504 Jarilla Mine p. A56-A60PA505-506 Old ]liner Mine p. A56-A60PA507-514 0"Mara Mine and associated prospects p, A76-A83PA515 Unnamed fault p. A76-A83AIOIIIIIIIIIIIIIIIIIII

i~ ma !~!"i ~NUMERICAL-ORDER LISTING, BY SAMPLE NUMBERS COLLECTED AT SITERange of sample nos. Site name Page/location informationPA516-517 Unnamed quartz vein p. A76-A83PA518-519 Homestake Mine vein p. A76-A83PA520-528; PA564-581 Jackalo-Paymaster quartz vein p. A76-A83PA529 Guajolote(?) Mine p. A76-A83PA530-533 Haist Mine p. A84PA534-535 Olive Mine p. A85PA536-538 Unnamed prospect p. A86PA539-541 Winifred Mine p. A87PA542-563 Four Metals Hill (Red Hill) copper porphyry p. A88-A91depositPA564-581 Jackalo-Paymaster vein p. A76-A83PA582-589 Pronto Mine vein p. A76-A83PA590-596 Gladstone Mine vein p. A76-A83PA597-598 Gross prospect p. A76-A83PA599-601 Minnesota Mine vein p. A76-A83PA603-605 National Mine p. A92-A94PA606-607 Isabella Mine p. A92-A94PA608-621 Shamrock Mine p. A92-A94PA624-627 Jabalina prospect p. A92-A94PA628-632 Big Lead Mine vein p. A76-A83PA633-635 Golden Rose Mine vein p. A76-A83PA636-637 Specularite prospect p. A76-A83PA638-641 Bennett Mine vein p. A76-A83PA642-707 Buena Vista Mine-King Mine vein p. A76-A83PA708-715 Unnamed prospects p. A92-A94PA716-718 Edna Mine group p. A76-A83PA719-723 Kansas Mine p. A96-A103PA724-725New York Minep. A96-A103PA726-728 Indiana Mine p. A96-A103PA729-735 Maine Mine p. A96-A103PA736 Unnamed prospect p. A96-A103PA737-744 Happy Thought Mine p. A96-A 103PA745-746 Bonanza Mine p. A96-A103PA747-749 Annie Mine p. A9~A103All

ii|.,IIII!1DESCRIPTIONS OF SAMPLED SITESLISTED BY SAMPLE NUMBER!!A few isolated mine and prospect localitiesfor which there are only very sparse data are notdescribed in this appendix. See sample descriptions(appendix B) for data concerning those sites.A13

Sample nos. PA5-15 Fig. 22, & pl. 1Sansimon Mine and nearby prospectsand alteration zone at Kunde MountainMine name from modern topographic maps.GEOLOGY.An extensive series of volcanic rocks of probable Tertiary age underlies this area(Drewes, 1980, sheet 2). Therhyolites have been intruded by Laramide andesite, as at theChristmas Gift and Elevation mines. Metallization is concentrated along narrow faults whichare4-ft-wide, maximum. Metals present, primarily lead, zinc, and silver, indicate that this siteis one of distal metal deposition, and most likely related to the Laramide intrusion of the RedMountain copper porphyry and breccia, or to some other, closer, undiscovered Lararnideintrusion.The drilled prospect at Kunde Mountain (see pl. 1 for mountain peak location), whichistotheN, of Sansimon Mine, is of interest due to its alunitic alteration zone. This zone maybe further indication of a concealed intrusive center, responsible for hydrothermal alterationand possibly hosting copper porphyry type metal deposition. Boundaries of the alunitic zoneare not known by USBM.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data on Sansimon Mine. The alunitic zone at Kunde Mountain was reportedly drilledin 1980 by a Canadian company, then abandoned (J. R. Thompson, USBM, written commun.,1993, data source not documented by researcher). Collar locations, drill data, and otherdetails are unknown.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Some samples contain several per cent of lead and zinc, and some contain over 1 ozAg/st (over 8 oz Ag/st, maximum) (appendix C, D). These high concentration levels are notof economic interest under 1994 market conditions because of the extreme narrowness of thefaults in which they occur. No resources can be delineated from available field data. Thefaults were not traced beyond prospect sites, so no tonnage estimates are possible. Theywould likely be low tonnages. No mapping of the andesite-rhyolite boundary has beenattempted. The area is unlikely to see exploration interest or development of vein depositsin the future due to low tonnages and the specific commodities involved.The area may, however, be informative to future exploration interests in search of ametallizing source other than the Red Mountain complex. An additional metallizing sourcewould allow for possible additional copper-porphyry or breccia pipe deposits at great depthsbelow the Sansimon area or nearby at Kunde Mountain (see pl. 1 ). Discovering such a depositwould be an expensive and time consuming undertaking.A14IIIIIIIIIIIIIIIIIII

Sample nos. PA23-34 Fig. 20-21IIIIIIIIIIIIIIi!Frisco Fair claimsOther claim names and/or operator names used at this site: Hummer,Apex, Margaret, Sheehy, Bergman, Chapman, Cofa and Daniel (Keith1975, p. 82).GEOLOGY.An extensive area, including these claims, is underlain by a Laramide volcanic seriesof rocks. The main structure (not mapped) is a fracture zone cut by a Laramide graniteporphyry dike (Keith, 1975, p. 82; Drewes, 1980, sheet 2). The granite dike and fracturezone are not described further in the literature, and were not mapped by USBM field crews.Metallization is irregular, pockety, and comprised of oxidized lead and silver minerals, withsome copper (Keith, 1975, p. 82).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Mining was from shafts and open cuts, sporadically, between the years 1916 and1948. Total production from all the workings estimated at 70 st of average 24% Pb, 7 ozAg/st, and 2.5% Cu (Keith, 1975, p. 82).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.USBM field evidence does not suggest any appreciable strike length to the generallyE.-W. trending fractures on these claims. The fractures are thin, and not heavily metallizedin commodities other than lead and silver. They are low-tonnage deposits that were ofeconomic interest due to their upper oxidized and supergene enriched zones. Several samplescontain several per cent lead, and some have geochemically anomalous levels of zinc andmanganese. Copper concentrations are far below 1% Cu. Silver was found in concentrationsof 1 oz to 3 oz Ag/st in several samples (see appendix C, D). For the metal concentrationsand the specific commodities encountered, it is not likely that fractures in this area will seeany future exploration or development.However, the area's faults/veins are zoned, with lead-silver in the upper part and zincencountered at depth. The nearby New York (Jensen) Mine is such an example (Schrader,1915, p. 243). This suggests copper enrichment may be encountered farther down. It hasbeen established that copper is in this hydrothermal system. This metallization may be thedistal expression of copper-porphyry deposition at considerable depths below the Frisco Fairdeposits. The site is therefore a candidate for future exploration for copper porphyry typedeposits, a conclusion concurred with by Keith (1975, p. 24). Exploratory drilling at Red BankWell by the Anaconda Company was not successful. That work is detailed on p. A16-A17.A15

Samplenos. PA35-66 Fig. 20-21Mines and prospects by Jensen Camp in Redrock CanyonIncludes:New York (Jensen) Mine, PA60-64 (fig. 20);Lampshire Mine, PA65-66 (fig. 20};Unnamed workings PA 35-59 (fig. 20-21);Durham Mine (no samples) (fig. 20);Red Bank well drill site (no samples) (fig. 20).GEOLOGY.Laramide volcanic rocks of andesitic and rhyolitic composition have been fractured ongenerally E.-W. trends (Schrader, 1915, p. 239-240; Keith, 1975, p. 75). Hydrothermalalteration zones extend outward from faults into the volcanic rocks, sometimes for severalfeet, in many locations. Some brecciation, silicification, and supergene enrichment throughoxidation and weathering is evident from the samples collected byUSBM. Silver and copperwere the main mining targets.New York (Jensen) Mine is apparently the most heavily metallized site of all theseworkings, based on interpretation of the literature. Metallization there is most likely the resultof intersecting dikes of rhyolite (NW. trend, NE. 55 ° dip, lO-ft width) and quartz (N. 70 ° E.,SE. 80 °, 40-ft to 60-ft width). The metals are in the quartz dike, and were found in ore-gradeconcentrations in the central 8-ft-wide section of the dike (Schrader, 1915, p. 242-243).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Red Bank well area (no samples). The Anaconda Company conducted geochemical andgeophysical prospecting around Red Bank well (fig. 20) during 1964, and followed withexploratory drilling. Results are that intrusive rock (monzonite) in the area contains higherconcentrations of copper, lead, and zinc, than do the volcanic rocks which were historicallyworked for metal deposits. It was learned that most metal deposition is controlled in a NE.trend due to vein and breccia systems and the contact between monzonite and andesite. Nomapping demonstrating these characteristics is known by the author. Zones of anomalouscopper, lead, and zinc were delineated (author has no maps), but no further work was done(J. R. Thompson, USBM, written commun., 1993, paraphrasing AGDC document no.8748.05, date not recorded by researcher).New York (Jensen) Mine (fig. 20) is the most extensively developed of the sites, buta specific production tonnage is not known. At least one carload of copper-silver-gold orewas shipped prior to 1915; that was in 1899 (Schrader, 1915, p. 241}. The area wasexplored by a party of French immigrants in the late 1870's; some of that party, Messrs. Salaand Michelato, located the New York (Jensen) Mine, and it was relocated by Peter Jensen in1886. By 1915, about 850 ft of underground development had been completed. The mainworking may have been site PA63-64 and adit PA62. Shaft PA63-64 may have been themain shaft, which was 160-ft-deep in 1915 with 200 ft of drifting off the shaft. Site PA60-61 is another possible site for this main working. Removal of mine dump and caving andA16IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIIflooding of shafts makes positive identification impossible. Either site PA61 or PA62 was a250-ft drift. (See Schrader, 1915, p. 242-243.)Durham Mine (no samples). The site was not searched for by USBM field crews. Itis approximately where shown on fig. 20, according to the 1:125,000-scale map in Drewes(1980, sheet 2), but Keith (1975, p. 82) reports a location farther to the NW., in NE. 1/4, sec.18, T. 22 S., R. 17 E. The Durham claims were worked for copper, and produced anestimated 70 st of hand-picked ores from 1937 to 1941 that averaged 24% Cu, 70 oz Ag/st,and minorAu. Workings were shallow shafts and adits(Keith, 1975, p. 82).Lampshire Mine, PA65-66, fig. 20. No historical data. Mine name found in writtencommunication (J. R. Thompson, USBM, 1993) but no documenting source could be found.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.USBM field crews did not map the metallized structures in these mine and prospectareas. This data void limits the completeness of any resource assessment. Based mainly onliterature, most of the sites appear to be low-tonnage deposits. Copper concentrations arefar below 1% Cu except at the Lampshire and the New York (Jensen) mines. Silver is mostlybelow 1 oz Ag/st, but is encountered at concentrations of nearly 20 oz Ag/st at the New YorkMine, and at nearly 26 oz Ag/st at the Lampshire Mine. A few samples contain over 1% Pb,and rare samples have geochemically anomalous levels of zinc and manganese (see appendixC, D).The 8-ft-wide metallized zone at New York (Jensen) Mine would not be mined under1994 market conditions for even the highest concentrations of any of the metals found inUSBM samples, because the narrow vein would be too costly to develop. Lampshire Minesamples also have appreciable metal concentrations, but the field data gathered are too sparseto allow assessment.No evidence is known that suggests appreciable strike length (and thus tonnage) forany of the other generally E.-W. trending fractures (Schrader, 1915, p. 240).Overall, for the metal concentrations and the specific commodities encountered, it isnot likely that this area will see any future exploration or development. However, the area'sfaults/veins are zoned, with lead-silver in the upper part and zinc encountered at depth. NewYork (Jensen) Mine is an example of this zonation (Schrader, 1915, p. 243). This suggestscopper enrichment may be encountered at greater depths. It has been established that copperis in this hydrothermal system. This metallization may well be the distal expression of copperporphyrytype deposition at considerable depths below the deposits. The area is therefore acandidate for future exploration for copper-porphyry type deposits, a conclusion concurredwith by Keith (1975, p. 24). Although details are not known by the author, work by theAnaconda Company in 1964 likely did not include drilling deep enough to delineate such acopper porphyry type deposit. This conclusion is based on the fact that appreciable quantitiesof metals that characterize distal deposits (lead, zinc) were reported in the Anaconda prospectarea.A17

Sample nos. PA68-89 Fig. 19, pl. 1Mines and prospects in Meadow ValleyIncludes:Sulphide prospect, PA68-69 (pl. 1);La Plata Mine, PA70-76 laka Black Ace (Keith, 1975, p. 82)] (fig. 19);Hale #3 prospect, PA77-86 (fig. 19);Meadow Valley Mine, PA87 (fig. 19) and Hale prospect (not shown);Hale #2 prospect (no samples) (fig. 19);Homestake Mine, PA88-89 (fig. 19).GEOLOGY.Drewes (1980, sheet 2) characterizes the rocks underlying the Meadow Valley area asTertiary(?}-age volcanics; Keith (1975, p. 82) refines the depositional time to Laramide. Themain rock types present are andesite and (apparently) exotic blocks oflimestone. Most of thelimestone is at the Homestake prospect. At the Meadow Valley Mine, andesite and a graniticintrusive are the dominant rocks. At the Hale #3 prospects, and the La Plata Mine, aTertiary(?)-age conglomerate is found. It is composed of clasts of limestone, chert, redsandstone, rhyolite, and andesite, and developed during the formation of the fault scarp thatdemarcates the SW. face of the Canelo Hills (Schrader, 1915, p. 240) and divides the CaneloHills from the Patagonia Mountains. Fractures, serving as conduits for probable hydrothermalalteration, have cut all these rock formations. Some are filled with quartz veins; others byquartz breccias. Skarn minerals formed where carbonate concentrations were intersected bythe fractures. The economic mineralization that has been found was dependent on supergeneenrichment of silver in the upper weathering and oxidation zone.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Meadow Valley in general, was a somewhat recent exploration site. The AnacondaCompany, during 1964, completed three core holes with composite drilling of at least 1,600ft. This was likely in the vicinity of the Meadow Valley Mine (fig. 19), but collar locations arenot known by USBM. Continuous pyritization was found at depth, but the area is barren ofcopper (J. R. Thompson, USBM, written commun., 1993, paraphrasing AGDC document no.8748.07, date not recorded by researcher).La Plata Mine (PA70-76, fig. 19) was one of the discoveries of a party of Frenchimmigrants that began exploring the area in the late 1870's; it was staked in 1881 by Messr.Carre, who mined the site until 1883 for oxide silver ores. Peter Jensen relocated the claimin 1886 (Schrader, 1915, p. 241). No other production took place (Keith, 1975, p. 82).Production amount is not quantified in the literature. Excavations completed by 1915 included2,500 ft: 600-ft of drifts on a 75-ft deep level; drifting and winzes at a 115-ft-deep level; andcomposite shaft sinking from the surface totalling 350-ft. Workings are narrow, and werebadly caved by 1915. All were excavated on the ore-bearing vein (Schrader, 1915, p. 241).Meadow Valley Mine (PA87, fig. 19) was mined in 1881 by Frank Olsen for richcerargyrite pockets in an E.-W. trending vein; these died out at shallow depths. ProductionA18IIIIIIIIIIiIIIIIIII

IIIIIIIIIIIIIIIIIamount is not quantified in the literature. The Hale prospect is on Meadow Valley Flat,someplace E. of Meadow Valley Mine. The site was not searched for by USBM field crews.Hale prospect consists of shallow pits, excavated before 1915, on vertical fracture sets withmalachite, azurite, and cuprite. Production consists of "a few sacks of ore" enriched in silverthat were hand picked from the surface. The thin ore-bearing seams and veinlets found arereported to pinch out at depths of 12 ft (Schrader, 1915, p. 244). The fractures have thesame trends as those explored at the Meadow Valley Mine.Hale #3 prospect (PA77-86, fig. 19) was prospected prior to 1915 by Frank Hale. Thesite is a siliceous dike with disseminated, small chalcopyrite and pyrite crystals, locallyconcentrated in veinlets. It was explored by shaft workings to depths of 65 ft (Schrader,1915, p. 244-245). This deep shaft is either shaft PA79 or PA80-81, fig. 19; the workinghad apparently caved in part by 1990. No production is known.Hale #2 prospect (no samples, fig. 19) is possibly the continuation of the New York(Jensen) Mine dike. Shallow pits excavated by Frank Hale prior to 1915 explore an argilliczone with minor copper carbonates between the dike and andesite (Schrader, 1915, p. 244).The site was not examined by USBM field crews. No production is known.Homestake prospect (PA88-89, fig. 19) explores copper-stained limestone andgarnetiferous skarn via a 160-ft-deep shaft and 40-ft-long crosscut, excavated prior to 1915.There was no production, because no significant metal concentrations were found (Schrader,1915, p. 244).Sulphide prospect (PA68-69, pl. 1) was staked on a slightly cupriferous barite veinprior to 1915. No production is known. The adit there is caved and the dump removed forroad fill. Extent of the underground workings is not known.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Historical data available delineate the following. The known "vein" deposits are verynarrow, and the silver metallization in them, though enriched through oxidation, does notextend to any considerable depths. Since no mapping of the metallized structures was doneby USBM field crews, lack of data void precludes any tonnage estimates.USBM assays of samples from the metallized structures are nearly all high-gradedmaterial from the dumps. La Plata Mine is enriched in silver (over 51 oz Ag/st, maximum),lead (several per cent Pb), and manganese (7% Mn to 15% Mn) and has geochemicallyanomalous copper, but in amounts less than 1% Cu. Silver and lead generally diminish in thesouthern workings that were sampled (Hale #3 prospect, Meadow Valley Mine, Homestakeprospect). Copper and zinc are the metals that are most concentrated in the southernworkings, with appreciable amounts only in the Hale #3 prospect. There, just one sampleexceeds 1% Cu and one other sample exceeds 1% Zn (appendix D, PA82-83). Goldconcentration is elevated at only onesample locality (PA78, Hale #3, 2.9 ppm Au, equivalentto about 0.08 oz Au/st); other samples have less than 0.5 ppm (appendix C)The commodities and concentrations present and the narrow nature of the metallizedstructures precludes future exploration interest or mineral development here in Meadow Valleyfor the structures themselves. No extensive carbonate rock unit is known in this area thatwould allow for a large-tonnage skarn deposit.A19

Future exploration interest is, however, viable for deeply buried metal deposits of thecopper porphyry type. The presence of pervasive copper, and the continuous pyritization atdepth below Meadow Valley, along with the presence of metals usually deposited in distallocations from copper porphyry hydrothermal centers (Pb, Ag) are ample evidence that copperporphyry-related alteration has likely taken place at some point below the area or belownearby peripheral areas. Abundance of carbonate in the local area suggests that this area, ifactually part of a copper porphyry system, is in the outer, or propylitic alteration zone. Thehigh-grade hypogene copper zone would thus be expected at depth, which could be severalthousand ft below Meadow Valley or under a peripheral area. Anaconda Company drilling in1964 (see historical section, above) may have targeted a copper deposit of the porphyry type,but Anaconda's deepest hole, based on the limited available literature, was no more than1,000 ft deep.Other porphyries found in the Patagonias, where drilling started in the outer alterationzones, were not encountered at depths less than 2,400 ft. The Anaconda Company drillingthus may have been too shallow, or the targets off line or off center. Three holes isa verysmall exploration effort for a deeply buried copper porphyry deposit. The absence of copperin core recovered by this drilling program, however, is a major negative piece of data.iIIIIIIIiIIiiIiiIiA2o |i

!i: !! ,/IIIIIIIIIIIIIIIISample nos. PA90-105 Fig. 18Christmas Gift Mine and Elevation Mine groupGEOLOGY.Laramiderhyolite of Red Mountain was intruded by Laramideandesite. Fractures inboth(?) lithologies host lead and copper carbonates and disseminated sulfide minerals,primarily pyrite and chalcopyrite.Christmas Gift Mine: Fracture in andesite (N. 65 ° W., SW. 87 ° ) hosts siliceous rockwith lead carbonate, iron oxide, and silver enrichment (90 oz Ag/st) (Schrader, 1915, p. 265).Strike length and down dip extent are not reported in the literature and were not addressedby USBM field crews.Elevation Mine group: an E.-W. fracture and breccia zone, at least 150-ft along strikeand 200-ft down dip, averages 5-ft in width and intersects both Red Mountain area rhyoliteand Laramide andesite. The zone is metallized with sulfides of copper and lead, and containssilver (see below).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Christmas Gift Mine: Mined as early as 1887 by Frank LaMonte. Production (pre-1915) was "at least two-carloads" of 90 oz Ag/st ore. Life-of-mine production estimated atroughly 100 st of average 40 oz Ag/st, 20% Pb, minor Cu and Au, between the 1800"s and1930 (Keith, 1975, p. 57).Elevation Mine group: Claims located in 1890, 1892, and 1893. Apparently alldevelopment excavations were done before 1915. No quantified production was reported(Schrader, 1915, p. 264).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.A breccia and fault zone of some extent is known at the Elevation Mine group, fromliterature. The zone trends E.-W. and is intersected via crosscut adit PAl 05 (fig. 18), 450-ftin from the portal. Crosscut drifting on the breccia and fault zone shows that it ends inrhyolite and a multitude of fractures, 150-ft westward from the intersection of thebreccia/fault and the crosscut (Schrader, 1915, p. 264). A minimum strike length can beinferred at 150 ft; eastward drifting from the crosscut point is not addressed in the literature.A minimum down-dip extent of the breccia/fault zone is 200-ft, from geology reportedbetween workings PAl 05 and PAl 01-104 (Schrader, 1915, p. 264). Since USBM field crewsnever returned to this site to map it in detail, this is the best data from which an resourcescenario may be inferred. The narrow zone, apparently 5-ft-wide, average, but at places 25-ft-wide (Schrader, 1915, p. 264-265), has some high copper, lead, and silver concentrationsfrom sulfide minerals: a 13-in.-wide zone on the S. side of the breccia zone in adit PA104contains 16% Cu, 10% Pb, 30 oz Ag/st (Schrader, 1915, p. 265). It is concluded that thesehigh metal concentrations are irrelevant due to the small size of the metallized structures andthus the low inherent tonnages. Structural control is too limited to make any tonnageestimates at the site, but the expected low overall tonnage does not suggest that a revisit tothe mine would be warranted. Future exploration or development here is thus concluded tobe unlikely.Field data gathered at the Christmas Gift Mine (PA93-96, fig. 18) and the workingswhich might belong to either the Christmas Gift or the Elevation group (PA90-92, 97-100) aretoo sparse for any complete resource assessment. Extent of the metallized structures is notA21

IIIIIIIIIIIISamplenos. PA106-115 Fig. 17Hidden prospects(source of name unknown to author)GEOLOGY.Laramide rhyolites of Red Mountain (Drewes, 1980, sheet 2) host metallized veins.History of the Red Mountain copper porphyry deposit is instructive in understandingmetallization at the Hidden prospect. Stockwork, hypogene metallization of Red Mountain isalso present at the Hidden prospect, as shown by the presence of hematite stringers. Hiddenprospect is on Red Mountain's NE. slope. Oxidation and weathering have mobilized copperin the Hidden prospect, just as it did at the Red Mountain hypogene copper porphyry zone.The presence of minerals such as chalcanthite is an example of this mobilization. Thepresence of free calcium in the system, evidenced by gypsum, suggests that this area iswithin the propylitic alteration zone of the overall Red Mountain copper-porphyry system.On a local scale, there are several, close-spaced, NE.-trending fractures that have beenexcavated at the Hidden prospects (fig. 17). A few in the southern end of the working grouptrend westerly. The overall N.-S. alignment of these workings and their location within asharply incised N.-S trending wash suggests a overall structural control by a N.-S fracturesystem, and metallization in NE.-trending shears within that N.-S. fracture system. Thiscannot be verified because of the paucity of data collected by USBM field crews. There is nomapping of structures in this area in previously published work. ....HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.It is likely this area contains only small, weakly metallized fractures with tonnages thatare too low for economic consideration, much the same as at the Aztec Mine group. Coppercontent is very low, below 0.01% Cu, in all samples but one (appendix C). Sample PAl14contains 0.94% Cu, an amount that is elevated, but not of interest in just one sample. Thepresence of copper here is likely reflective of the much larger copper influx in the RedMountain copper-porphyry system.iilA23

Samplenos. PAl17-126 Fig. 15-16Aztec Mine groupGEOLOGY.Porphyritic rhyolites, deposited in Laramide time, host a sericitized fracture zone,2,000-ft-long, which dips SE. 75 ° (Schrader, 1915, p. 263; Keith, 1975, p. 56, Drewes,1980, sheet 2). No strike is recorded in the literature. No mapping of the fracture zone wasdone by USBM field crews.The history of the Red Mountain copper-porphyry deposit is instructive inunderstanding the Aztec Mine group. Disseminated (and stockwork), hypogene coppermineralization of Red Mountain is also present here at the Aztec Mine group, which is withinRed Mountain, on the NW. slope. The presence of free calcite to form carbonate mineralssuggests this area is within the propylitic alteration zone of the overall Red Mountain copperporphyrysystem. Oxidation and weathering have mobilized copper in the Aztec Mine group,just as they did at the Red Mountain hypogene copper-porphyry zone. The presence ofminerals such as chalcopyrite, pyrite, copper carbonates, and most importantly, chalcocite(Keith, 1975, p. 56), demonstrates the similarity in metallization and in mobilization of themetals. Metals were preferentially concentrated in thesericitized fracture zone. Bornite hasalso been reported in the excavated areas (fig. 15). The most extensive of the metallizedlenses reported is 50-ft-wide and extends for 100 ft along strike (Schrader, 1915, p. 264).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Little is known. R.R. Richardson, who developed the Three R Mine, owned 24 miningclaims in this area in 1915 (Schrader, 1915, p. 263). Keith (1975, p. 56) reports that a "fewtens of tons" of 7% Cu ores were produced in the early 1900's. "Somewhat recent"bulldozer work, observed in the spring of 1994, buried the workings (C. E. Ellis, USBM,written commun., 1994).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.A complete assessment of the metallized fracture zone is not possible, because it wasnever mapped by USBM field crews, or previous workers. Keith's (1975, p. 56) descriptionof the nature of the metallization (small banded lenses and disseminated minerals) suggestsno economic concentration of metals. The very low historical production supports thissuggestion. The USBM samples collected in the area contain no copper or other metals ineconomic concentrations. The nature of hypogene, disseminated copper in the main part ofthe Red Mountain copper-porphyry depositional area suggests that no economic,disseminated, hypogene, porphyry-type concentration of copper is present peripheral to thesericitized fracture zone in the Aztec Mine group. The site is unlikely to see future explorationor economic interest for metals in fractures in the rhyolite. Apparently reclaimed after theUSBM sampling was conducted.A24IIIIIIIIIIIIIIIIIII

IiIIIIIIIIIIISample nos. PA127-138 Fig. 3Workings in Alum GulchIncludes:Exposed Reef Mine (name from modern USGS topographic map); Exposed Reef Mine or nearbyworkings may actually be the Blue Eagle Mine. Workings labelled "Blue Eagle Mine"on modern USGS topographic maps (see fig. 3) may or may not be the true locality ofthe mine. Schrader's (1915, p. 257-258) location of the mine is clearly in Alum Gulch,which suggests workings at site PA132 or possibly PA127 may be the true Blue EagleMine site. T~o little is known about the workings in Alum Gulch and Flux Canyon thatare N. of the Flux Mine and the Hampson Mine to untangle the history of these sites.See details on the Blue Eagle Mine under its own heading, p. A112.Hampson Mine (locality from modern USGS topographic map), PAl 35-138.GEOLOGY.Schrader (1915, p. 257) describes a pervasive rhyolite that is continuous to RedMountain and is disseminated with large percentages of cupriferous pyrite and minorchalcopyrite. This geologic setting likely describes all the workings sampled at sites PAl 27-138 and the numerous unsampled workings in between them. Base- and precious-metalsulfide minerals apparently concentrated in quartz veins in this area. The intrusion of the RedMountain system likely is the cause of this metallized veining and disseminated metallization.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Little is known. A brief description of the Hampson workings is in Schrader (1915, p.258).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Sparse data on structures and their continuity preclude a complete analysis of the sitesfor resources. Known data suggest that the metallized siliceous veins are very narrow, andcorrespondinglywill have low tonnage. No base-metal and silver veins so narrow could bemined economically under 1994 market conditions. The presence of gold is established at theHampson Mine, but in low quantities. Historical grades are roughly 0.08 oz Au/st (Schrader,1915, p. 258), but USBM samples (appendix C) contain only about 1 ppm Au (0.03 oz Au/st)or less. It is therefore unlikely that these sites will receive future exploration interest for gold.IA25

Sample nos. PA139-142 Fig. 3, 41Flux MineMost likely named for the utility of the rock as flux in smelting Mowry Mineores and more refractory ores at other mines as described by Schrader (191 5,p. 263).GEOLOGY.Flux Mine is a zoned, vein-type deposit of base and precious metals, hosted both inlimestone, and to the north, in Tertiary-age rhyolite which has been compared to the RedMountain rhyolite (Schrader, 1915, p. 260-261). Oxidized ores, composed ofargentiferouscerussite, argentite, minor copper oxides, and silicate material, occupy the upper part of theore body. Sulfides, primarily galena, sphalerite, pyrite, and chalcopyrite, are encountered atdepth(Schrader, 1915, p. 262;Keith, 1975, p. 58). Zinc ores were encountered below thelead-silver ores (Kartchner, 1944, p. 83). Copper concentrations increase at greater depth(Schrader, 191 5, p. 262). Oxidized ores average 30% to 15%lead(Pb), 30ozsilver(Ag)/stto4 ozAg/st. Siliceous ores average 14% Pb, and 5.4 oz Ag/st (Schrader, 1915, p. 263).Life-of-mine grades are estimated at 8% Zn, 5% Pb, 2.5% Cu, 5 oz Ag/st, and minor Au(Keith, 1975, p 58). High iron content of the ores (8% Fe} made them useful as flux. In theearly history of the mine, rock from the Flux Mine was used at the Mowry smelter. Othersmelters used Flux Mine rock to work refractory ores (Schrader, 1915, p. 263).Metals are strongly localized on NW.-trending fractures in the Harshaw Creek faultzone (Simons, 1974, map), which dips SW. 45 ° , (fig. 41). The Harshaw Creek fault zoneintersects a narrow limestone block which is enveloped by quartz monzonite and graniticrocks. These rock units are in turn enveloped by Tertiary-age rhyolite. Metals are found inboth rhyolite and limestone. Width of the zone was reported between 30-ft at the top of themine to 8-ft at the 260-ft level. (See Schrader, 1915, p. 260-261; Simons, 1974, map.) Themost recent history of mining, which included working of zones over twice as deep as the260-ft level, suggests that the metallized zone widens again at depth (see below).Metal leakage and distal deposition from the Red Mountain copper porphyry system,about 1 mi to the N. (pl. 1) is a possible source of base- and precious-metal deposition at theFlux Mine. The Harshaw Creek fault (Simons, 1974, map), a major fault that is at least 12-mi-long and also intersects the Blue Eagle Mine workings (fig. 3), may have served as aconduit that facilitated metal-bearing solution movement into the Flux deposit area. The minealso fits into the pattern of metal zonation outward from the central Patagonia Mountainscopper porphyry area (fig. 3).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Flux Mine has a long history of development, much of which is not well known by theUSBM. The site was mined by Mexicans prior to the 1850's, mostly from the irregular opencutworkings (fig. 41). U.S. prospectors located claims on the site in the early 1850's. By1858 ores were being taken to the mouth of Alum Gulch [essentially where Arizona Route 82crosses Alum Gulch (pl. 1 )] and treated in adobe smelters. Reportedly, the site furnished leadfor Civil War ammunition. The mine claims were relocated and worked several times between1878 and 1914. By 1915, the site had produced nearly 50,000 st of ore, and had over5,000 ft of excavations on 5 levels (surface, 70-ft, 10-ft, 125-ft, 260-ft; see fig. 41). In theera following this, nearly twenty times more ore was mined (see below).A26IIIIIIIIIIIiIIIIIII

IIIIIIIIIiIIIIIILessees operated the site until 1939, when it was 3urchased by American Smelting .....and Refining Co. The 260-ft level portal was used as the main haulage level for ores. By1944, mining levels had been worked to depths of 430 ft. It was in the 1940"s that thedeeper sulfide ores (lead-zinc-silver) were displacing oxide ores as the economic target(Kartchner, 1944, p. 82-83). Data in the Anaconda Geological Document Collection allegedlyreports production of 4,000 st per month during the early 1950's from workings on a 590-ftlevel, and development underway for a 670-ft level but USBM researchers did not documentthe data source (J. R. Thompson, USBM, written commun., 1993). It is obvious that thecomposite Flux Mine workings are considerably more extensive than those.shown on fig. 41.Newer maps are not available to USBM. A. S. & R. Co. shipped ores to the Trench Mill.Production ended in 1963, under a lessee named McFarland, who operated the mine andTrench Mill (Koutz, 1984, p. 205). Life-of-mine production totals are estimated at 850,000st (Keith, 1975, p. 58).By sample site PAl40 (fig. 3, 41), was a glory hole of considerable dimensions,observed by the author during a brief visit ~n early 1~91; no maps, measurements, orestimates of its size were made by USBM field crews. The main, 260-ft-deep shaft reportedby Schrader 1915, p. 259) was apparently in this glory hole area. Kartchner (1944, p. 82)reports access to the mine was through this glory hole, during the A. S. & R. Co's. operations.This glory hole perimeter was fenced in 1991. From recollection, the author estimates thatthe glory hole represents most of the area shown on fig. 41, where level workings from theopen cut, 70-ft, 100-ft, and 125-ft levels overlap. It is not known by USBM whether theglory hole resulted from collapse or block-cave mining of the older workings.Size of the glory hole has recently become a moot point. A USBM field crew that wasconducting sampling for potential abandoned mine land hazards in the region in April 1994noted that the site was undergoing active reclamation and that the glory hole had been filledwith mine waste rock.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Absence of structural measurements by USBM field crews and absence of any moderndata on the character, tenor, and continuity of the ore body at depth prohibit assessment ofany mineral resource scenarios at this site. Most workings (fig. 3) were not mapped byUSBM field crews and no data were collected concerning their condition, minerals present,or even whether they had been examined. Data reported from other undocumented literature(J. R. Thompson, USBM, written commun., 1993) are that the ore grades did not diminish atdepth and that the ore body was not exhausted at time of cessation of mine operations, over30 years ago.Mine waste. No data were recorded by USBM field crews. The extensive area worked andthe depths reached in mining suggest that mine dump tonnage could be considerable. Themost modern mine dump materials would be expectedly sulfide-rich. The largest dump on theproperty is at or very near site PA141 (see fig. 3), which is the 260-ft level portal(Courtwright and Richard, 1951, map). However, it is this dump that was one of those usedto fill in the glory hole in the April 1994 reclamation work.A27

Samplenos. PA143-145 Fig. 3,42World's Fair MineGEOLOGY.Silver was mined from a generally N.-S. trending quartz vein system in a body ofCretaceous-age quartz diorite or andesite that covers a roughly rectangular area about 800-ftby 1,200-ft. Laramide-agevolcanic rhyolite surrounds the intrusive rock. Limestone blocksare also reported at the mine. (SeeSchrader, 1915, p. 250; Kartchner, 1944, p. 87; Keith,1975, p. 60.)This vein system has apparently been mined along its entire strike length (about 600ft), comparing the mapping of Simons (1974, map) and the array of adit PA143-145 and thethree, closely-spaced shafts to the S. of PA143-145 (see fig. 3). Outcrop and mineexcavations, combined, expose the vein system for 1,000 ft down the dip slope; 600-ft wereexposed through mine development. World's Fair Mine vein system dips toSW. 80 ° at thesurface, but only 45 ° in the mine. The vein averages 6-ft in width (Schrader, 1915, p. 250).The vein is zoned, with lead-silver ores in the upper, oxidized zone; the lower,unoxidized sulfide zone contains copper minerals (tetrahedrite, and lesser amounts ofchalcocite). Gold concentrations also increase at depth. Reported grades in the deeper partsof the mine are average 20% Cu, 500 oz Ag/st, and slightly under 1 oz Au/st, material whichwas shipped directly to a smelter at Selby, CA after hand sorting (Schrader, 1915, p. 250-251}.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Keith (1975, p. 60) reports mining between the early 1880's and 1954 produced13,000 st of average 58 oz Ag/st, 6.6% Pb, 0.7% Cu, and minor Au, Zn. The site waslocated in 1879 and mined until 1881 for "considerable" amounts of ore, then abandoned.Relocated in 1883 and sold to an operator in 1884, the mine apparently had a profitableperiod of operation through late 1914, when lead, silver, copper, and gold ores were mined.The site was for sale for $1,000,000 in 1915 (Schrader, 1915, p. 248-249).The mine's main entrance is a crosscut adit at elevation 4,680 ft, from which a 600-ftwinze was sunk. Levels (no. unknown) were spaced 100 ft apart and drifting off the winzereached maximums of 1,000 ft to both N. and S. By 1915 the site had 15,000 ft ofunderground workings. Mine maps were apparently published in Schrader (1915, pl. 1, 2),but the plate-size maps were stolen from the USBM's copy of the report. Another possibledata source is Phelps-Dodge Corp., which made maps of the mine workings in 1925(Kartchner, 1944) (see fig. 42). Acquisition of the stolen Schrader (1915, pl. 1,2) plates mayprovide mine geology.Attempts to operate a 10-stamp mill on the site with concentrators failed after threemonthtrial in 1897. This is the only known milling on the site.History from 1915 until 1930 is unknown. In 1930, J. C. Shell leased the propertyand high-graded the reserves until 1941, leaving small, high-grade ore bodies in the mine. Thelower levels were flooded by 1930 and all mining to at least 1944 was on the main level (seefig. 42) or above, in other adits (Kartchner, 1944, p. 87-88).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.If Keith's (1975, p. 60) life-of-mine totals are correct, this vein probably has noeconomic significance under 1994 market conditions, due to low tonnage and low overall goldA28IIIIIIIIIIIiIIIIIII

!IIIIIIIIgrade. Kartchner (1944, p. 88) adds more support to this negative assessment by reportingthat high-grading was done (thus lessening reserves) and that the metallization was spotty,even though rich in silver. Unless they contain high-grade gold zones (over 1 oz Au/st), theseare the type of structures that are not economical to mine in 1994.The USBM field crews collected no structural data on the site. This data void coupledwith the fact that different veins were mined on different levels of the mine, precludes anycomplete analysis of a resource scenario at this site. It is concluded that future work here isunlikely, based on available data.Environmental issues, particularly mine waste. Plate 17 in Schrader (1915, following p. 248)gives a view of the amount of waste rock on the site. The largest dump on the propertycontains about 720,000 ft 3 of rock, or about 37,000 st. Several pyritic dumps located abovethe road that runs through the property contain a combined 107,000 ft 3, or about 5,500 st(C. E. Ellis, USBM, written commun., 1994).The mine was producing etfluent water from adit PA143-145 (haulage level) in April1991, and when observed again in April 1994.i!i!i:~ 1 ~i!i:ill I~ ~; .,~ .,~i-A29

Samplenos. PA146-159 Fig. 44Buffalo groupPreviously known as the Jefferson group (Schrader, 1915, p. 276).Includes:Prospect (PAl 46);Lead Queen Mine (PA147-t59).GEOLOGY.The Buffalo group is underlain by Cretaceous-age porphyritic andesite and rhyolite(Schrader, 1915, p. 277; Simons, 1974, map). Fractures bear zoned, siliceous, metallizedveins, the most extensive of which are the pair of veins worked at the Lead Queen Mine (fig.44). Extents along strike are not known; no mapping was done by USBM field crews orpublished in existing literature. Down dip, the Lead Queen was mined to 166ftonone of theveins; they are 600 ft apart. The veins are difficult to trace on the surface. They containlead-silver minerals in the upper 40-ft to 50-ft, and below that contain sulfides of lead, silver,and copper. Some barite-gangue ores and some metal carbonate minerals are present.Average grades: 56% Pb,9.2% Fe, 2.8%Cu, 2%Zn, 55ozAg/st, and about 0.09 oz Au/st.Copper is mostlychalcocite. (SeeSchrader, 1915, p. 277.)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.This metallized vein system was discovered in 1897, then sold to George Wieland, whomined 200 st in the period of 1898 to 1900. Jefferson Mining Co., New York, purchased theclaims and produced 100 st of ores in 1901; it was closed by early 1902. In 1910, theproperty was under development by T. E. Munn Mining Co., San Antonio, TX, which wasproducing ore from a 3-ft-wide zone with 21% Cu, 20 oz Ag/st, and about 0.25 oz Au/st.Total production is estimated at 500 st. (SeeSchrader, 1915, p. 276-277.)ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Appreciable silver concentrations (over 10 oz Ag/st in one sample) were detected inonly the high-grade samples collected from the dumps. The in-place samples from one of themined zones in the Lead Queen Mine (fig. 44; PA147-159) contain much lower levels ofmetals which do not warrant economic interest. The vein is thin, averaging less than 4-ft inwidth. No vein that narrow is of economic interest under 1994 market conditions for thelevels of silver encountered. Also problematic is that dense vegetation prevented mapping ofeither vein. This data void makes tonnage estimation impossible, yet the tonnage is probablytoo low for economic consideration.A30I|IIIIIIIIIIIIIIIII

IIIIIIIiiIiIIIIIISample nos. PA160-168 Fig. 44Wieland groupNamed after George Wieland, a principal owner in 1915(Schrader, 1915, p. 275).Includes:Basin No. 1 prospect (PA160-162, fig. 44);Dewey prospect (no samples; fig. 44);Great Silver Mine (PA163-166, fig. 44);Red Rock prospect(?) (PA167-168, fig. 44).GEOLOGY.The Wieland group is underlain by Cretaceous-age andesite and rhyolite with oldersi!icatsd !imcstcns c.~.~ .~.'/drcthcrma!ly altered shale (Schrsdcr, !9! 5, p. 275; S!mcns, ! 27~,map). The sedimentary rocks are likely xenoliths or exotic blocks. Fractures in the volcanicrocks bear metallized gouge and sometimes siliceous veins; they are very thin, on a scale ofa few in. to a few ft. Extents along strike are not known; no mapping was done by USBMfield crews or published in existing literature.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.As of 1915, George Wieland and Theodore Gebler owned the majority of the interestsin this mine and prospect group, and there was a mining camp established in the immediatearea. Mining, however, ensued much earlier.Two carloads of 52% Pb and 35 oz Ag/st, and $1.90 Au/st (perhaps 0.1 oz Au/st)were mined in 1882 and 1883 from the Great Silver Mine (PA163-166, fig. 44). The minedzone was a 2-ft to 3-ft-wide replacement vein of heavily iron-stained quartz and gypsum insiliceous rhyolite with argentiferous galena as the ore mineral. The vein dip is N. 30°; all orewas derived from a span of 60-ft down dip, which lies above the contact with andesite. Theflooded shaft shown on fig. 44 (PAl 63-166) is actually a 60-ft-deep stope that reached thesurface. It was raised from a 50-ft-long drift that is no longer visible. (See Schrader, 1915,p. 275.)Basin No. 1 prospect adit (PAl 60-162, fig. 44) was driven 188 ft in a NW. directionon a lensing fissure vein (N. 64 ° W., SW. 70 ° to 80 °) through andesite. The vein is composedof gouge and a little quartz, and hosts only oxidized material on the hangingwall, composedmineralogically of azurite, malachite, limonite, cuprite, and chrysocolla. The mined zone isgenerally 2-in. to 8-in.wide, and reaches a maximum width of 2.5-ft. Three lenses wereworked. One is at the portal, on which a 30-ft-deep winze was sunk; the second is 45-ft infrom the portal, and the third lens is 90-ft in from the portal. Another winze, 20-ft-deep, wassunk in the adit, 140-ft in from the portal; the mined zone continues at the bottom of thewinze, where the zone is 10-in.-wide. The dump contained a carload of 7% Cu, 1 oz Au to1.5 oz Au/st, and minor silver, and 800 st of 4% Cu material in 1915. (See Schrader, 1915,p. 276.) No production is known from this prospect.Dewey prospect (not examined) was an old caved working by 1915. It consisted ofa caved shaft on a 2-ft-wide gouge zone through andesite that contains cuprite, malachite,azurite, and chrysocolla. The gouge zone dips NE. 75 ° and apparently strikes slightly northof west. Described as 600 ft S. of the Basin No. 1 prospect, the Dewey site is shown onlyA31

approximately on fig. 44. No strike length extent is known for the metallized gouge. (SeeSchrader, 1915, p. 276.)Caved adit PA167-168 (fig. 44) may be the Red Rock prospect mentioned by Schrader1915, p. 275). No historical details are known. Another working, about 700 fttothe NW.(see pl. 1) was not examined by USBM field crews.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.The sampled faults/veins are very thin, ranging from a few in. to a few ft in width.Even though the zones were not mapped by USBM field crews to determine their extent alongstrike, it can be said that these veins host very low tonnage deposits, at best. Further, theliterature does not demonstrate any appreciable down-dip extent for any fault zone or vein.USBM samples are mostly high-grade; even at that, they contain only a few per cent lead andzinc, and have well under 0.5% Cu. Gold content is negligible. Silver is elevated in severalsamples, in the range of a few oz Ag/st (appendix C, D). There is no evidence that theseveins will experience any further exploration or mine development interest due to the lack oftonnage, and the absence of significant metals concentrations other than silver.A32!IIIIIIIIiiIIIIIiIi

ilSample nos. PA169-195 Fig. 3, 9Chief Mine grouptIIIIIIIilii¸ iiGEOLOGY.Geology at the mine group is variant. In part, the site is comprised of silicifiedfractures through limestone and through Jurassic- to Triassic-age volcanic rock; at some sites,skarn actually developed. At one locality (PA171-188, fig. 3, 9), a breccia pipe wasprospected. Sites associated with limestone contain sulfide minerals, mainly pyrite, galena,and sphalerite. Chalcopyrite is rare (Kartchner, 1944, p. 92). The fracture zones are 2-ft to4-ftwide. They were not mapped by USBM field crews and no mapping is available in theliterature. Strike extent is not known. The breccia pipe that was prospected in one adit ofthe Chief Mine group (PAl 71-188, fig. 9) does not contain appreciable metal concentrations.,HISTCRY, DEVELGF~]E,~T, OWr~EF~S;-;IF, PF, CDUCT;O~.Very little is known. Several shafts and prospect pits had been excavated by 1944,the deepest of which was the 230-ft-deep main shaft. The workings and mine buildings werereportedly in poor condition in 1944 (Kartchner, 1944, p. 91). No report specifically statesthat there was ever production at this site, though some production is likely, based on theamount of excavations in the sulfide zones.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Field data and available literature are too sparse to allow assessment. Site unlikely tosee more development due to narrowness of the metallized fractures, and the low metalcontent of the breccia pipe.IA33

Sample nos. PA196-208 Fig. 3, 65Panama adit (prospect)Source of prospect name unknown to author.GEOLOGY.In argillically altered, Tertiary- or Cretaceous-age volcanics with nearby silicified zonesand breccia pipes (Simons, 1974, map) (see fig. 3). Enveloped by a much larger area ofpyritization, which transcends numerous lithologies and ages of rocks and crosses into an areaof propylitic alteration. The pyritization and argillic/propylitic alteration zones have aconcentric outcrop pattern, as mapped by Simons (1974, map) and Graybeal (1984, p. 188).See geologic map, fig. 2; fig. 3.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Narrow fracture zones and faults intersected by this prospect adit contain somegeochemically anomalous silver and copper concentrations (appendix D), but the narrownessof the structures probably precludes any appreciable tonnage at the site. There is someuncertainty because USBM field crews did map structures outward from the prospect due tonear-vertical slopes and impenetrable vegetation. The metal content is a result of thepervasive metallization, albeit below economic levels, from the central Patagonia Mountainscopper-porphyry area (fig. 3).A34IIIIIIIIIIIiIIiIIiI

IIiIIIIIIIIiIIIIIISample nos. PA209-288 Fig. 3, 7, 12-13Prospects in central Patagonia Mountains copper-porphyry and alteration area, peripheral toreported molybdenum anomaly (see fig. 3)Includes:Unnamed prospect, PA209-210 (fig. 3);Unnamed prospect in breccia pipe, PA211-223 (fig. 3, 7);Sunnyside Mine area, PA224-256 (fig. 3, 12);Unnamed prospect, PA257-258 (fig. 3);Standard(?) prospect and surrounding area, PA259-272 (fig. 3, 13);Thunder prospect and surrounding area, PA273-288 (fig. 3, 13).GEOLOGY.Within a large area of argillic alteration (Simons, t 974, map) that transcends numerouslithologies and ages of rock. Included are Triassic- to Jurassic-age volcanics and possibleintrusives; Tertiary volcanics, with silicified zones and breccia pipes; Cretaceous Bisbee Grouprocks (conglomerate, mostly); other breccia pipes and alteration zones (see fig. 3). All theseareas are enveloped by a much larger area of pyritization, which transcends the same varietyof lithologies and ages of rocks. The pyritization and argillic/propylitic alteration zones havea concentric outcrop pattern, as mapped by Simons (1974, map) and Graybeal (1984, p.188). See geologic map, fig. 2; fig. 3.A north-northeast trending area of anomalous molybdenum concentration wasdelineated between the general Sunnyside Mine area (PA224-255, fig. 3, 12) and theStandard prospect (PA261-271, fig. 3, 13) and Thunder prospect (PA273-288, fig. 3, 13);available literature does not quantify the anomaly (AGDC, 1967, map). USBM samples andfield observations demonstrate that the area is also anomalous by its elevated concentrationof disseminated copper-sulfide minerals, particularly at the part of the Thunder prospect thatwas examined by USBM field crews (adit PA273-285, fig. 13). From a geochemicalviewpoint, presence of these metals in the existing hydrothermal alteration environmentsuggest that a deeper part of a copper-porphyry system might be exposed or nearer to thetopographic surface in this particular part of the central Patagonia Mountains copperporphyry/brecciapipe/alteration area.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Data are sparse.Sunnyside Mine PA225-255, was located in 1897 by R. Farrell, and that year, twoshafts were sunk (Schrader, 1915, p. 254-256). One, the Sunnyside shaft, is the site about1,200 ft NW. of adit PA226-252 (fig. 3). USBM did not examine the Sunnyside shaft, or laterexcavations around it (located from Simons, 1974, map). It was 90-ft-deep in 1915, and hadstoping for 20-ft to the S. and 15-ft to the N. on a 35-ft-deep level (Schrader, 1915, p. 255).Keith (1975, p. 59) introduces the names Sunnyside and Volcano mines; but the nameVolcano properly is one of the original group of mining claims of the Sunnyside Mine; it wascalled the "Volcano claim". A shaft was started on the Volcano claim by 1897 (this is sitePA255, fig. 3, 12), and was about 90-ft-deep with some unknown amount of drifting on a35-ft-deep level by 1915 (Schrader, 1915, p 255).Thunder prospect (PA273-288) and possibly the unexamined adit about 1,500 ft S.of PA273-285); Standard prospect (possibly PA261, PA264-271, and the unexamined aditA35

about 1,500 ft N. of PA261). Schrader (1915, p. 256 257) noted copper, as chalcopyrite,concentrated along shear zones in granitic porphyry at the Standard prospect, and aschalcocite, at the 20-ft level of a 40-/t-deep shaft (shaft location is not known but may be sitePA262-263, where more recent bulldozer work would have obliterated evidence of a shaft).At the Thunder prospect, PA273-288 and workings to the S., disseminated sulfides (pyrite,chalcopyrite, tetrahedrite, molybdenite) were noted in granitic porphyry, and were exploredfor their content of copper, gold, and silver. However, there was still some connectionbetween fracturing and the metallization. Adit PA273-285 was only 82-/t-long in 1915(Schrader, 1915, p. 256-27).Industry drilling for an economic-grade copper-porphyry deposit in this area has beenundertaken at several sites (fig. 3).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Copper is the only anomalous metal encountered is this area by USBM sampling. Theonly sites at which copper concentration elevations are high enough to elicit economic interestare focused around a silicified zone and a breccia pipe in Tertiary- or Cretaceous-age volcanics(sites PA211-255, fig. 3), where northwest trending zones (sometimes shears) in volcanicscan carry around 1% copper (Cu) (see appendix C, D). The copper concentrations are notpersistent, suggestin9 that no economic metal continuity is present.The only structure that is known to have produced ore is the shear at the SunnysideMine (adit/shaft on fig. 12 plus unexamined workings 900 ft to the NW., on. fig. 3), but itproduced only 1,600 st, through hand-picking of ores (Keith, 1975, p. 59). USBM field crewsdid not attempt to map out this shear zone. Schrader (1915, p. 255-256) states that thezone trends N. 50 ° W. and is 200-/t-wide. The metallized zone is possibly continuousbetween the Sunnyside and Volcano shafts, though its extent beyond the sites is not known.Schrader (1915, p. 256) reports 500 st of 3% Cu on the dump of the Sunnyside shaft, alongwith 15 st of 14% Cu. More than 500 st is on the dump currently (1994), but rock exposedon dump surface is low grade (unsampled) (C. E. Ellis, USBM, written commun., 1994). Oreat Sunnyside Mine was copper carbonates in quartz.The 200-ft wide pyritic zone at Sunnyside Mine, with its reported 900-ft strike lengthand 90-ft down-dip extent, suggest that over 1.3 million st of siliceous, potentially copperbearingrock is present. If it is all metallized at 2%- to 9% copper, and a few oz of silver/st,as was the mined ore (Schrader, 1915, p. 256), the site could possibly be of interest to asmall mining operation. "A little native gold" was reported in the high-grade malachite zonesmined from the Sunnyside shaft (20% Cu) (Schrader, 1915, p. 256), which could furtherenhance the economic viability of this site. However, limitation of the historical mining to anarrow shear zone suggests that the full estimated 1.3 million st zone of potentially copperbearingrock will not be minable, and that any minable zone present will be less than 200-ftin width.Industry drilling for an economic-grade copper-porphyry deposit in this area has beenundertaken at several sites (fig. 3). Mostly these drill sites are north, northwest, and southof the Standard and Thunder prospects and on the ridge line that trends northeast from thesoutheast part of the Sunnyside Mine. Available data do not indicate that any copperporphyry deposits were discovered as a result of this drilling. Unavailable industry data mayindicate otherwise.A36IIIIIIIIIIIIIIIIIII

IIIIIIIiIiI!l!!Sample nos. PA289-311 Fig. 3, 45Quartz-sulfide veins and dikes near Trench CampIncludes:Humbolt Mine (in part) (PA289-305, fig. 3, 45);January Mine (not examined by USBM; fig. 3);Red Bird Mine (aka Norton Mine; Uncle George Mine)(not examined by USBM; fig. 3);Trench Mine (Josephine shaft) (not examined by USBM; fig. 3);"Original" Trench Mine (not examined by USBM; fig. 3);Unnamed prospects: PA306-311 (fig. 3).GEOLOGY.Cretaceous- and Tertiary-age rocks, primarily votcanics wi~h some lesser amounts ofintrusive rocks, are cut by thin, siliceous, lead-silver veins (Simons, 1974, map), many ofwhich have appreciable copper and zinc content. This area is on the northeast periphery ofthe central Patagonia Mountains copper porphyry area, well within the pyritic alteration zone,but far enough from the core hydrothermal alteration areas that the lead-silver-zinc suite ofmetals is present in higher quantities than copper (see fig. 3). Molybdenum is not present inappreciable amounts. The veins have been mined to depths of 800 ft. Most were inaccessibleduring the USBM Coronado field study of 1990-1991; their historical narrowness suggeststhat only low tonnages of resources remain today, if any, and therefore the mines are not ofeconomic consequence.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Humbolt Mine area was discovered in 1885 and worked primarily from 1887 to 1889by William Harrington and James Gillespie for a quartz-gangue ore with fine-grained galena,sphalerite, and minor tetrahedrite(?). The main development was a 160-ft-deep shaft on theridge top, a site that was not examined by USBM field crews (see fig. 3). Phelps-Dodge Co.purchased the mine in 1912, with plans to ship ores to the Copper Queen Smelter, Douglas,AZ (Schrader, 1915, p. 251 ). It is not known if further ore shipments ensued. The metallizedzone is a 2,200-ft-long fault, striking N. 45 ° E. (Simons, 1974, map) (see fig. 3), whichapparently dips south at 80° (Schrader, 1915, p. 251 ). It may be only 2-ft-wide (Schrader,1915, p. 252). It is known to be metallized for at least 700-ft down dip, as exposed by mineexcavations; the copper content increases with depth (Schrader, 1915, p. 251), which istypical of metal zonation outward from a main hydrothermal alteration area such as the centralPatagonia Mountains copper porphyry area. The 160-ft-deep main shaft was flooded towithin 15-ft of the collar in 1915 (Schrader, 1915, p. 251).Total mine production is estimated to be small: 1,200 st averaging 7% Pb, 19 ozAg/st, 1.5% Zn, 1% Cu, and minor Au. Mining went on intermittently until 1952 (Keith,1975, p. 58).Trench Mine (Josephine shaft). Josephine Mine was referred to as the "Trench Mine"by the 1930's, but originally, "Trench Mine" was a separate property, about 2,000 ft N. (seefig. 3)° Neither site was examined by USBM field crews. They are on mineral patentscontrolled by ASARCO, Inc. Trench Mine (Josephine shaft) was discovered in the mid-A37

1870's, mined from 1885 until 1890, and then mined extensively from 1893 to 1897, duringwhich time the deposit was opened to a depth of 500 ft and by 3,500 ft of linearexcavations. The lead-silver sulfide ore was in a N. 45°-dipping vein, apparently siliceous,hosted in a Cretaceous-age dioritic intrusive-volcanic sequence of rocks (Schrader, 1915, p.254; Simons, 1974, map). Schrader (1915, p. 254) reports that this vein is an extension ofthe original Trench Mine site, about 2,000 ft N. (fig. 3).After a hiatus in mining of an unknown length of time, the mine was reopened in 1936.An active mill was on the site in the 1940's, when the mine was a major Arizona lead andzinc producer, and had been excavated to the 800-ft-deeplevel. An estimated 13,000ft ofunderground workings had been completed by this time. The mine production fed ASARCO's200-st flotation mill (see fig. 3), which was built in 1939 (Kartchner, 1944, p. 88-90). Nomine maps were acquired by the USBM for this property, but they likely exist in the files ofASARCO, Inc.Historical production data are combined in the literature with that of the original TrenchMine. It is not possible to separate the two (see "original" Trench Mine, below).The vein was notably thin (2 ft in places) (Kartchner, 1944).The mine dump, Josephine shaft, mill site, and four tailings ponds were reclaimedduring 1990-1992.The "original" Trench Mine was not examined by USBM field crews. Its location wasdetermined by analyzing data in Schrader (1915, 'p. 254), Kartchner (1944, p. 88), andSimons(1974, map). This site was discovered no later than the 1850's, and was mined asearly as1859. The site was patented no later than 1872. Much of the mine production tookplace in the mid-1880's, after the 400-ft-deep shaft (sunk in 1880) was completed. Therewas milling at this site in the early history of the mine, to treat rich lead-silver ores (Schrader,1915, p. 253-254). At some unknown time prior to 1944, the mine was closed and the sitewas stripped down to old concrete foundations (Kartchner, 1944, p. 88). The fracture zonehosting the ore vein of the mine has been mapped (Simons, 1974, map) and is shown on fig.3.Keith's (1975, p. 75) life-of-mine production for "Trench Mine" is 237,000 st of 8.5%Pb, 6.3% Zn, 13 oz/st Ag, and minor Cu, Au. This production was from 1918 to 1945 andpreviously, in the latter half of the 1800's. USBM surmises, from limited available data, thatthe vast part of this production came from the Trench Mine (Josephine shaft), describedabove, which became .the "Trench Mine" by the 1930's (fig. 3).The January Mine and the Red Bird (Norton) Mine. The mines are on mineral patent(s)controlled by ASARCO, Inc. They were not examined by USBM. Shaft workings were usedto develop a rhyolitic dike in Cretaceous-age andesite (Keith, 1975, p. 59; Schrader, 1915,p. 252-253). The exact demarcation between the Red Bird and the original "Trench Mine"(Keith, 1975, p. 59) is not known to the USBM.At the January Mine (originally Padrez Mine), workings were developed in the early1870's on a rich, near-surface, argentite pocket, which yielded 10,000 oz of silver.Additional development ensued on the dike (N. 30 ° W., NE. 75°), which was 6-ft to 7-ft inwidth, between the January and Red Bird properties. At least three shafts were sunk. Two,on the dike itself, were considered "old" by the era of Schrader (1915). Another, which wasflooded at 80-ft in depth in 1915, was sunk E. of the mined dike as an attempt to intersectit down-dip. Ore-zone material on the dump of this shaft was described as quartz ganguewith galena, sphalerite, pyrite, and argentite, hosted in diorite (Schrader, 1915, p. 253). ThisA38IIIIIIIiIIIIIIIIIII

IIIIIIIiIIiIIIIIIIdiorite host is comparable to the Cretaceous-age andesite of Keith (1975, p. 59). The locationof a few mine workings at the site are known from examination of modern topographic maps,but the precise sites of workings on the dike or off of it are not known.Red Bird Mine main shaft was caved in 1915, but the dump was described as large atthat time. It is on a continuance of the dike at the January Mine, has a similar dip (NE. 78°),but is wider (15-ft to 20-ft). Mine production was reported to have been considerable(Schrader, 1915, p. 252).Combined production at the two mines is about 71,000 st of average 6% Zn, 4% Pb,7 oz Ag/st, and minor Cu and Au. A lead-zinc operation was mounted there during 1944 to1949 (Keith, 1975, p. 59), probably in conjunction with lead-zinc mining at the Trench Mine(Josephine shaft). Other mining was for silver, during 1925-1928 and in the 1870's (Keith,1975, p. 59). Analysis of the historical data suggests that more of the tonnage came fromthe Red Bird Mine than from the January Mine.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Humbolt Mine PA289-305 (fig. 3}. Very little first-hand data are available concerningthe mined zone. Four factors are considered: the considerable down-dip extent of mineralizedrock (700 ft); the considerable strike length of the fault zone in which the mined vein occurs(2,200 ft}; the very small total life-of-mine production (1,200 st); the reported narrowness ofthe vein (2 ft). Lacking first-hand examination of the site, it must be concluded thatmetallization along this vein was irregular and of low tonnage. Veins so narrow cannot bemined economically for lead-silver sulfides, and thus, the vein is probably of no economicconsequence in 1994, and is not likely to see future exploration.Trench Mine (Josephine shaft), Trench mill site, and tailings ponds (no samples) (fig. 3). Thesites were reclaimed by ASARCO, Inc., in 1990 and 1991. No data are known that wouldpermit estimation of additional resources on the mined structures."Original" Trench Mine (no samples) (fig. 3). The site was apparently abandoned and strippedof equipment and structures by the 1940's. Actual date of closure is unknown, but probablymuch earlier. No data are known that would permit estimation of additional resources on themined structure.January and Red Bird Mine (Norton Mine) (no samples) (fig. 3). The site was not examinedby USBM field crews. Structural data from Simons (1974, map) indicates that a fracture zoneextends from the January and Red Bird properties to the site of the original Trench Mine, adistance of at least 2,700 ft. Structural data from Schrader (1915, p. 252-253) suggestswide mining targets (6-ft to 20-ft). These are favorable structural conditions for the existenceof mineral resources. Unfavorable data are primarily: 1) the era for recovering base metalsfrom vein deposits, even ones this wide, is generally over; 2) the January Mine may not havebeen operated at all this century; 3) the site (probably the Red Bird Mine) was mined for leadand zinc at the end of its life, not for silver.Certainly no tonnage could be estimated for resources at either mine site. Too littleis known about the mining history and the structures that were mined. The silver, whichwould be the most eliciting of economic interest in 1994, would probably not be found inquantities that were found historically. It was mined mostly from rich surface deposits, whichwould have experienced some enrichment through the oxidation process. Further, there isA39

evidence of metalzonation. Silver and lead are highest in the vein system, copper is lowest,and zinc is in between. New mining would be deep on the structure, if it is continuous.Continuity hasn't been determined. New mining would probably yield only zinc in appreciablequantities, with some byproduct copper. A vein target of moderate tonnage and width is noteconomically viable for zinc production in 1994.Environmental data. Schrader (1915, p. 252) noted sulfides and aluminum mineralsleaching from the mine dump of one of the workings in the January-Red Bird mines area. Anywater quality evaluation of Alum Gulch would logically include an examination of this site tosee if any dump material remains.Unnamed prospects PA306-311 (fig. 3). Prospects are in Cretaceous-age rocks, either thelocal volcanic series, or Bisbee Group sedimentary rocks. Only limited structural data wascollected for these sites by USBM field crews, such that extent of the metallized structurescannot be estimated. Based on assays of rock-chip samples from the sites, the containedmetal values are too low to generate economic interest.A40IIIIIIIIIIIIIIIIIIi

!~ i ~,IIIIIIIIiililSamplenos. PA312-317 Fig. 3, 40Unnamed manganese prospectPossibly J. D. Kirkpatrick manganese prospect? of Bell (1940a)GEOLOGY.This prospect was excavated on thin (1-ft to 5-ft-wide) faults in quartzite of theCretaceous-age Bisbee Group. Precise manganese content is not known, but several of thecollected samples contain over 1% Mn; these exceeded the laboratory maximum detectionlimit for manganese and were not rerun at elevated detection limits (see appendix D, samplesPA31 2-315).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Not known. There is a slight possibility that this site is the J. D. Kirkpatrickmanganese prospect described by Bell (1940a), but the location data in that reference areimprecise enough to cause doubts.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Data gathered by USBM field crews are too sparse for a complete resourceassessment, but indications are strong that the metallized zones are far too narrow and of fartoo low tonnage to contain resources.i ¸ ~iaIA41

Sample nos. PA318-324 Fig. 3Blue Nose Mine (aka Abe Lincoln Mine)GEOLOGY.A block of limestone-and-quartzite sedimentary rocks, classed either Cretaceous BisbeeGroup (Simons, 1974, map), or Jurassic- or Triassic-age volcanic envelopments of oldersedimentary rocks (Keith, 1975, p. 57), or as Paleozoic-age (Schrader, 1915, p. 278), wasintruded and metallized by sheeted rhyolite. The rhyolite contains disseminated pyrite andchalcopyrite, but ore zones are pockety and oxidized, consisting of argentiferous galena,sphalerite, and minor chalcopyrite and tetrahedrite. The gangue is manganiferous (Keith,1975, p. 57). The ore zone was developed toadepth of 200ftby 1915 on a structure thatdipped mainly NW. 40 ° (Schrader, 1915, p. 279); its strike is not known by USBM.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Intermittent mining from early 1880% to 1956 produced 13,000 st of average 18 ozAg/st, 2% Pb, 1% Zn, 0.5% Cu, and minor Au (Keith, 1975, p. 57). A 2,000-st tailingsdump on the property (PA323-324) suggests a flotation mill was used on the site. It maydate from before the 1930's.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.With the paucity of data available about the strike length and overall dimensions of themined structure, little can be surmised about the possibility of resources on the site.However, if the mined structure is no wider than the 4-ft width reported in (Schrader 1915,p. 279), it does not represent an economic target, because of low tonnage and the specificmetals contained in it. No silver-lead-zinc veins of this size are economical to mine under1994 market conditions.In contrast, a report of a breccia pipe being found at the site during 1960's eraexploration(S. R. Davis, USBM, oral commun., 1994) lends some possibilities to highertonnagemetallization in the vicinity, some of which may contain metallic mineral resources.Site of this breccia pipe is not known to the author. In order to be a mineral resource target,the pipe must contain considerably more copper than was mined historically at the Blue NoseMine, and preferably with some precious metals content.Environmental issues. Further evaluation of the tailings would be warranted as a part of anystudy of the water conditions along Harshaw Creek. Primarily, the mineralogy of the tails andthe metallic content of the water both up the wash and down the wash from the site wouldbe useful, and could be quickly determined. A brief examination of the tailings in early 1992showed that there are both oxidizing and reducing zones, suggesting that mill methods or oremineralogy changed over time.A42IIIIIIIIiIIIIIIIIII

IIIIIIIIISample nos. PA326-327 Fig. 3, 43Augusta MineGEOLOGY.Cretaceous-age Bisbee Group rocks (Simons, 1974, map) host a quartz-carbonate veincomplex with argentiferous galena. Supergene enrichment enhanced silver concentrations(Keith, 1975, p. 75).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Discovery was made in 1878 and claim relocation in 1905. Mining, probably all priorto 1900, produced 100 st of 57% Pb, 40 oz Ag/st, 10% Zn and 0.2 oz Au/st (Schrader,1915, p. 308; Keith, 1975, p. 75)ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.The vein extent is not estimated in literature, nor was it measured by USBM fieldcrews. Its observed thin nature (half aft) suggests there are no resource possibilities at thissite. The 110-ft-deep shaft reported at the property (Schrader, 1915, p. 308) was not foundby USBM field crews. That site would have to be examined further for a more completeanalysis.ii/~:i ¸'• J i'A43

Sample nos. PA328-331 Fig. 3Endless Chain MineGEOLOGY.A 2.5-ft-wide, NE.-trending replacement zone of Cretaceous-age Bisbee Group quartzitewith banded chalcopyrite, pyrite, tetrahedrite, and chalcocite, was excavated by scatteredadits and an inclined shaft (Schrader, 1915, p. 307-308; Keith, 1975, p. 79). If all theworkings on fig. 3 are on this same replacement zone, then it has a strike length of at least1,600 ft.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Scattered workings (fig. 3) were mined for 100 st of copper-silver ores prior to 1900.No recent activity is thought to have occurred.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Silver is present in the mined zone in amounts of 1 oz to 2 oz Ag/st. Copper isgeochemically anomalous, but does not occur in concentrations that warrant economicinterest. The mined zone is apparently of considerable strike length, but its thin natureprecludes its consideration as an economic target for either copper or silver under 1994market conditions. The maximum gold content is 1.9 ppm at site PA330 (appendix C).Environmental issues. Acidic effluent observed at the site of inclined shaft PA328-329apparently is related to highly pyritic, oxidizing mill tailings. Amount of tailings observed in1994 was 21,000ft% or about 1,100st. See sample descriptions in appendixB. Dump ofthe flooded, unsampled adit between PA328-329 and PA330 has been removed by streamerosion. Adit PA331 dump contains about 320,000 ft 3, or 17,000 st (C. E. Ellis, USBM,written commun., 1994).A44IIIIIIIIIIIIIIIIiII

IIIIIIIIIIIIIIIISample nos. PA332-334 Fig. 3Morning Glory MineGEOLOGY.A silicated zone, conformable with bedding in limestone of Cretaceous-age BisbeeGroup rocks, dips NW. 40 ° , is 4-ft to lO-ft-wide, and is at least in part occupied by a rhyolitedike. Rock in the mined zone is pyritic and has high-grade zinc in the upper levels, and highgradecopper-silver in the lower levels. A S. 45°-dipping, high-copper, low-zinc vein wasencountered in the bottom of the 200-ft-deep inclined shaft which crosscuts the mined orezone. The mined zone has not been excavated below a depth of 200-ft. No data werereported concerning its continuity below that level, or its continuity along strike. Ore mineralsare pyrite, chalcopyrite, sphalerite, minor galena, with a gangue of banded quartz, hematite,specularite, minor barite. Oxidation, which enhanced the value of the ores during their initialyears of development, occurs to depths of at least 50 ft, and much deeper at the N. end ofthe deposit. High-grade zones of 17% Cu and 15 oz Ag/st were known, as were zones of60% Zn. Typical ore grades were 3.5% Cu and 3.5 oz Ag/st. (See Schrader, 191 5, p. 306-307; Keith, 1975, p. 80.)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Located and mined in the late 1880's by David Neal and A. S. Henderson for enrichedoxides of silver which were roasted at the Mowry Mine facilities or leached. Intersection ofthe sulfide zone led to abandonment of the site. Relocated in 1895 or 1896, the propertyapparently experienced sporadic work over several years. Copper ores became the chiefinterest from 1907 to 1929 and the bulk of the production was for copper. Some ore wasshipped in 1912 to the Pioneer smelter at Sahuarita, AZ. 'Ores were in demand at Sonora,Mexico because their high sulfide content facilitated metal recovery from more basic oresbeing worked in Mexico.A shaft was being extended in 1915 at the site by C. B. Wilson, of Helvetia, AZ. Atthat time, the mine consisted of levels at 50 ft, 100 ft and 150 ft off the inclined shaft.There was stoping and 200 composite ft of drifting off those levels. (See Schrader, 1915,p. 306-307; Keith, 1975, p. 80.) It is not clear from the notes collected by USBM field crewswhich of the two shafts shown on fig. 3 is the original inclined shaft. The inclined shaft wasopen during the 1991 USBM visit to the site; the other shaft was caved.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Subeconomic resources likely remain in the mine. Keith (1975, p. 80) reports life-ofmineproduction of 5,000 st with average 3% Cu, 4 oz Ag/st, minor Zn and Au. In 1915,when extensive underground development was in place, C. B. Wilson blocked out 50,000 stof copper-silver reserves (3.5% Cu and 3.5 oz Ag/st) (Schrader, 1915, p. 306-307). Of thepossible 45,000 st remaining in the mine, none may be recoverable due to mine deteriorationover the past 65 years of inactivity. It is unlikely that such a low-tonnage deposit would beput into operation for historical grades of copper and silver. Highest-grade zinc concentrationsare more economically interesting, but no tonnages of zinc-rich material are known to beblocked out in the mine. Overall low tonnage would likely preclude further development forzinc as well. The absence of on-strike continuity data for the mined zone precludes acomplete analysis.A45

IIIIIIIIIIIIIIIISample nos. PA335-338 Fig. 34Alta MineThe site was patented by the early 1900's (Schrader, 1915, p. 271).patent ownership not known.CurrentGEOLOGY.This sulfidized lead-silver bearing quartz vein in rhyolite breccia is considered to be anextension of the January-Red Bird (Norton) Mine shear (Koutz, 1984, p. 205), a relationshipwhich is bourne out by Simons' mapping (1974, map). The rhyolite breccia, which dips NE.40 °, is hosted in intrusive rocks of quartz dioritic- to quartz-monzonitic composition. Rhyoliteis the metallizing agent, and metals have migrated into the diorite watlrock for up to 200-ftfrom the vein. Argentiferous galena in quartz and fluorite gangue are the principal oreminerals; the vein has replaced the rhyolite. Other minerals noted are pyrite, specularite,sphalerite, minor chalcopyrite, malachite, embolite. The metallized zone continues for at least250-ft down dip. No bottom of the deposit reached by the miners. (See Schrader, 1915, p.272.)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Alta Mine was worked in 1877and 1878. Ores were leached, probably for silver, atthe Harshaw camp. New ownership in 1879 developed the site extensively, shipping ores tothe Boston Mill on the San Pedro River at Charleston, AZ, the site that was milling all theTombstone, AZ ores at the time. Sporadic, undocumented mining took place through 1897.Melba Mining Co., N. Y., worked the site from 1897 until about 1898 or 1899. From then,until 1915, the site was idle, and equipment was removed. Roughly 4,000 ft of undergroundexcavations had been completed by that time. (See Schrader, 1915, p. 271 .) Keith's (1975,p. 56) report that the mine was worked in the early 1900's offers conflicting history. Koutz(1984, p. 205)reports the mine site was dismantled by 1905. Life-of-mine production isestimated at 3,500 st of average 35% Pb, 10 oz Ag/st, 1% Cu, and minor Au (Keith, 1975,p. 56).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Factors to consider in evaluating the resource scenarios at Alta Mine are primarily: 1)a possible long strike length1; 2) historical narrowness (2-ft to 3-ft) of the high-grade minedzone (Schrader, 1915, p. 272); 3) presence of a part of the high-grade zone, at the 250-ftlevel, with 2 oz Au/st, 15 oz Ag/st, 37% Pb, 2-ft to 3-ft width, and proven continuity ofstrike-length extent exceeding 45-ft; 4) reports that the high-grade zone was not mined out(Schrader, 1915, p. 272); and 5) the fact that this site has been reclaimed (J. R. Thompson,USBM, written commun., 1993).Analysis: the narrow structure would be expensive to mine, and therefore isconsidered only because of its reported high gold content, with appreciable possible silverbyproduct value. The long strike length over which this metallized zone may occur providest Schrader (1915, p. 272) reports a possible 1/4-mi-long strike length extension of the shear to the W. of the mine. Simons(1974, map) mapped a NW.-trending fault that extends both NW. and SE. of the Alta Mine.A47

a favorable exploration target, area-wise. Moores {1972, p. 73) challenged Schrader's /1915,p. 272) report that the high-grade rock was left unmined.This area around the old Alta Mine represents a speculative, low-tonnage (fewthousand st) exploration target for vein gold deposits, based solely on historical data. It wouldhave to be explored by drilling from the surface, since the workings are no longer accessible.A search of old exploration records of local mining companies may reveal additional productionfrom the mine, which would logically have come from the exposed high-grade zone on the250-ft level. Unless several other zones of comparable grades could be discovered, it isunlikely that any further mining would take place here. The fact that the site has beenreclaimed is not supportive of speculation that undiscovered gold deposits may exist here.A48IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIISample nos. PA339 Fig. 34Salvador MineGEOLOGY.A weekly defined, kaolinized quartz "vein" hosts manganese and silver metallization.The vein is within a block of limestone, 900-ft by 200-ft or 300-ft in area, which issurrounded by rhyolitic volcanics of Triassic- to Jurassic-age. The structures that host themined zone are described as subparallel shears and veins which dip N. 35 ° to 40 ° andapparently strike E.-W. The zone is on trend with the Hermosa Mine, 2,500 ft to the E. (SeeFarnham and others, 1961, p. 172; Moores, 1972, p. 83; Simons, 1974, map.) No data wererecorded concerning the strike length of this deposit by USBM field crews in 1990 and noneare available in the literature. USBM sampling in 1944 and 1945 determined that the westernfaces in the stopes due W. of site PA339 contained ore and that their W. extent had not beenreached. Only high-grade zones have been worked historically (Farnham and others, 1961,p. 172). Ore minerals are psilomelane, pyrolusite, braunite, and cryptomelane, with most ofthe silver in cryptomelane (Moores, 1972, p. 83). The main Hardshell Mn-Ag manto is lessthan 50 ft below this Salvador Mine deposit (Koutz, 1984, p. 212).Historical silver grades reported in ores are very high, and probably represent supergeneenrichment. "Manganese content is around 15% Mn. Assay of a 10-st USBM samplecollected in 1944 is 13.5% Mn and 10.7 oz Ag/st. A 15-st USBM sample collected in 1945contains 15.2% Mn and 11.3 oz Ag/st. Eighteen lots of the silver ores shipped in earlieryears of the mine life averaged 19% Mn (Romslo and Ravitz, 1947, p. 9; Farnham and others,1961, po 172).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The Salvador claim was staked in 1877. The property consists of a single mineralpatent (meets and bounds not known by USBM). Hermosa Mining Co. operated the site inthe early 1880's, producing 1,000 st of 30 oz Ag/st ore. Lessees operated from 1936 to1941, producing 2,000 st of manganiferous silver ore. Another 800 st was produced by1944. There is only sketchy data concerning manganese production. Any that may haveoccurred was in the WWI era, and was hand-sorted (and thus likely a low tonnage). (SeeFarnham and others, 1961, p. 172; Koutz, 1984, p. 212.) A review of the literature suggests1,000 st of Mn ore was produced (see below).As part of the WWII effort to stimulate domestic manganese production, the USBMtook bulk samples from the main stope area of the mine (not examined by USBM field crewsin the 1990-1991 Coronado National Forest field study). This stope site is represented by thetwo adit symbols due W. of site PA339, on fig. 34. The dithionate process of sulfur-dioxideleaching was applied to samples and a 90% recovery of the manganese was achieved.Follow-up cyanidation removed 90% of the silver (Farnham and others, 1961, p. 172).Extensive workings on strike with the main stope area and to the E. (fig. 34) are shownin Koutz (1984, p. 206), but not in the USBM map dating from 1941 (Farnham and others,1961, p. 173). This suggests that much of the most recent development history of the siteis unknown to the USBM. Workings E. of the main stope area (such as site PA339) werelikely the site of 1,000 st of Mn ore production from WWI that is traditionally attributed to theHardshell Incline Mine (see Hardshell Incline Mine data, this appendix, p. A114).A49

IIIIIIIIIIIIIIIIISample nos. PA340-342 Fig. 34Black Eagle MineGEOLOGY.Manganese and silver deposition, primarily as minerals pyrolusite, psilomelane,manganiferous calcite, and cryptomelane (Moores, 1972, p. 76), are hosted in a NE.-strikingfault zone (dips. NW. 30 ° to 40 ° ) through silicified limestone (Farnham and others, 1961, p.169). The carbonate rocks are enveloped by Triassic- to Jurassic-age volcanic rocks. Thehosting fault zone is continuous to the Hardshell Incline Mine, though strike trend is variable(Simons, 1974, map). Fault zone thickness ranges from 2-ft to 8-ft, and the metallization isirregular and lenticular. Metallized, mined strike length is 400 ft, in 3 separate pods alongstrike; the main mined zone is 100-ft along strike. An inclined shaft was sunk on the fault to180-ft depth (site PA341-342), and stoping of ores took place primarily in the upper 100 ftof the deposit. Below that depth, ore zones become smaller and more widely separated. Theore zone increases in silica content below 28-ft depth. Grade was determined by USBMsampling during 1941, with 57 samples that were collected from the deepest undergroundworkings accessible at that time. Average grade determination from those samples is 8.3%Mn. Range of metallization is 2% to 24% Mn and 0.8 oz Ag/st to 10.8 oz Ag/st (Farnhamand others, 1961, p. 169).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Black Eagle deposit was discovered through silver prospecting in the late 1880's andwas mined for silver ores by 1885, but was not worked on any appreciable scale until WWI,when 66 st of 44.8% Mn ore was produced. From 1918 to 1921, 3,200 st of silver oreswere mined and shipped to custom smelters for silver recovery. Average grades for thosecarbonate ores are cited as 28 oz Ag/st, 19.9% Mn, 0.9% Pb, 0.18% Cu. Manganese wasnot recovered from this ore (Wilson and Butler, 1930, p. 95; Famham and others, 1961, p.169; USBM Mineral Property file AZ 463.1/43). Lessees operated the property in 1953 duringthe time of Federal Government manganese purchasing; 82 long tons of 19% Mn ore was soldto the Deming, NM purchasing depot. Production was from site PA340 (fig. 34). Additionalproduction shipped to Deming, NM, consisted of 41.7 long tons of 22.9% Mn in 1954(Farnham, 1957a, p. 1). By 1957, the property was idle, equipment removed, and most ofthe underground workings were inaccessible (Farnham and others, 1961, p. 169-170;Farnham, 1957a, p. 1).Workings not noted by USBM field crews of the 1990-1991 Coronado study are 200ft W. of inclined shaft PA341-342 (see fig. 34), and include inclined excavations that werestoped for 60-ft along strike and 30-ft down dip, to a maximum depth of 100 ft (Farnham andothers, 1961, p. 170).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Descriptions from the literature suggest that this deposit is of a very small overalltonnage. It was estimated by USBM in 1957 that the best parts of the ore zone had beenmined out (Farnham, 1957a, p. 1), and that only a few hundred st of 8% to 10% Mn in theA51i "=•

eserve category 2 remain at the site. The Black Eagle site overlies part of the Hardshellmanto deposit, though not the main part of the measured, subeconomic manto resource.Should southern, peripheral parts of the Hardshell manto deposit ever be mined (see fig. 34),the Black Eagle site could be worked further as a part of stripping overburden for access tothe manto.Possible mine subsidence. Near-surface stoping (as shallow 28 ft and mostly in the upper 100ft of the deposit) allows the possibility of surface subsidence and eventual opening of stopesto the surface, which could beahazard. Some "openstopes"reportedataditsitePA342(J.R. Thompson, USBM, written commun., 1993) may be evidence of subsidence alreadyunderway. Maps of the underground workings existed at the time of the previous USBM workin 1957 (Farnhamand others, 1961, p. 169). Maps were most likely owned at that time byGrover Marsteller, Nogales, AZ, who purchased the mining claims in the 1940's and ownedthem until at least 1957. Current ownership is not known byUSBM. A search for these oldmaps would permit ready assessment of the area that may experience future mine subsidence.2 Tonnage would be reclassified in 1994 as measured, subeconomic resources.A52IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIISample nos. PA343-344 Fig. 34, 37Bender Mine (originally Fernando property)GEOLOGY.This manganese deposit occurs in cherty, fractured, altered Concha Limestone (partof the Permian-age Naco Group) and is along the contact of Triassic- to Jurassic-age volcanics(Farnham and others, 1961, p. 167; Simons, 1974, map). Manganese has been mined fromthe surface to a depth of 140-ft in the metallized rock; a sublevel (fig. 37) indicates that somemanganese occurs even deeper in the deposit, but that depth is not known. Undergroundworkings were caved at the time of 1990 USBM examination. Manganese occurs in theminerals pyrolusite and wad; a composite, 350-1b sample assay is 17.3% Mn (Farnham andothers, 1961, p. 167). Alternate banding of quartz and manganese oxides was observed(Moores, 1972, p. 75).Observing spatial relationships, it is quite possible that this site is metalliferous leakagealong fractures, and that the metals originated with the Hardshell manto mineralizing event.Moores (1972, p. 75) observed that metallization is irregular but confined to a N.-trendingnormal fault that dips steeply E. Mapping by Simons (1974, map) shows this fault continuouswith the Hardshell Incline Mine.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The site was mined for silver as early as 1880 (Farnham and others, 1961, p. 165) andapproximately 50 st of average 20 oz Ag/st was produced during the late 1880's and in 1937(Keith, 1975, p. 56). During Federal purchase programs of WWI and WWII, the site wasworked, and approximately 2,100 It (long tons) of manganese ores was produced,extrapolating data from Keith (1975, p. 56) and Farnham and others (1961, p. 165). In 1941,the USBM and U.S. Geological Survey mapped and investigated the site during the FederalGovernment's efforts to accelerate manganese production (Farnham and others, 1961, p.165). Bender Mine was idle during 1944 to 1952. Two producers shipped 3,892 It of 20.1%Mn ore during 1952 to early 1955. The ores went to the Federal purchasing facility inDeming, NM. By 1957, the property was idle and mining equipment was removed (Farnhamand others, 1961, p. 166). The property was thought to be abandoned for "some time" andthe dump was overgrown, according to Moores (1972, p. 75).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.The only resource estimates available are "sizeable, but extremely irregular, mineralizedareas containing 10 to 20 percent manganese were indicated". They contain 1 oz to 5 ozAg/st (Farnham and others, 1961, p. 165-166). Lack of any structural data precludes anyfurther analysis. The fact that surface exposures of the manganiferous zone are good allowsthat the site could readily be investigated further, even though the underground workings arecaved.Previous USBM testing of the ores for amenability to concentration by flotation andnodulizing was not successful, because a concentrate of acceptably high Mn levels could notbe made. But leaching with SO2 obtained favorable Mn extraction levels (Farnham and others,1961, p. 167-168).If resource tonnage data are documented at this site through future field work, thedocumented resource tonnage at this site could be considered part of emergency supply ofA53

IIIIIIIII,~i: ~'/i j;!: -Sample nos. PA346-351 Fig. 46, 60Mary Cane adit (origin of name not known by author) &Unnamed prospect PA351GEOLOGY.Hosted in Tertiary-age rhyolite like the workings at the Trench Camp area, but this siteis on the western slope of the Patagonia Mountains. A hydrothermally altered fault gougezone there, of limited strike length (about 60-ft) (PA347-349), contains no anomalously highmetal concentrations.Shaft PA351 was sunk in breccia along the contact with older intrusive rocks.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.No information available that would suggest any resources are present at this site.i!=1 'A55

Samplenos. PA352-367,479-506 Fig. 59-62Metallized structures in Precambrian complex rocks and/or granitic Jurassic-age rocksIncludes:Native Silver prospect PA352-353 (fig. 60);Big Stick prospect PA354-355 (fig. 60);Ledge prospect (no samples; location uncertain) (fig. 60);Domino Mine group (includes Lookout claims; aka Old Chief Mine) PA356-360 (fig. 60);Cox Gulch (lower) prospects PA361-367 (fig. 60-61);Denver Mine and nearby prospects PA479-489 (fig. 62);Sonoita Mine PA490-492 (fig. 59);Robert E. Lee Mine (or Bob Lee Mine) PA493-496 (fig. 59);Palmetto Mine (later included in Tres de Mayo group) PA497-502 (fig. 59);Jarilla Mine PA503-504 (fig. 59);Old Timer Mine PA505-506 (fig. 59).GEOLOGY.Native Silver and Big Stick prospects: metallized shears and fractures in blocks ofTriassic-age sedimentary rocks that are encompassed in the Jurassic-age granitic intrusive.No data on extent of fractures on strike or down dip.Domino Mine group (Lookout claims) (possibly PA356 or PA357 or PA358-359): aneast-west fracture with argentiferous galena occurs at contact of diorite and granitic rocks ofthe Precambrian complex. Oxidized surface zones worked down to 80-ft depth.Ledge prospect: site location not known for certain; comprised of several pits in thegeneral area shown on fig. 60. A 1,000-ft-long silicified "ledge" that has been shearedcontains copper and iron sulfides. May originate from a Jurassic-age granite porphyry(Schrader, 1915, p. 291).Cox Gulch (lower) prospects: along the contact of Precambrian igneous rocks andJurassic granitic rock are siliceous veinlets with copper and iron sulfides. Some disseminationof metal sulfides. Other workings discussed by Schrader (1915, p. 291 ) under the label "CoxGulch prospects", 1-1/2 mi to the SE. at the head of the Cox Gulch (PA467-474), are coveredin this appendix in a later section (p. A73).Denver Mine and nearby prospects: two long, NE.-trending quartz veins in Precambriancomplex rocks. Only one examined; it appears to be too narrow to mine for the containedmetals. Argentiferous lead, some elevated copper (sulfide) and a few ppm gold.Sonoita, Robert E. Lee, Palmetto, Jarilla, and Old Timer mines: quartz-rich fissure veinswith argentiferous galena and with chalcopyrite deposited in Precambrian-age intrusive ormetamorphic rocks and sometimes at the contacts of Precambrian- and Jurassic-age rocks.The Jurassic rocks are granitic. Some veins exhibit banding of the quartz and metal sulfides;others exhibit post-depositional crushing. The veins have high grades, such as double-digitoz/st of silver and double-digit percentages of lead, but the low tonnages produced (500 st,maximum at any one mine) suggest that they are very narrow veins (Schrader, 191 5, p. 288-291; Keith, 175, p. 73-74). USBM samples show economic levels of lead and silver, andsometimes high, but subeconomic levels of copper and manganese; gold is present, but atconcentrations less than 1 ppm Au (appendix C, D). Lead vanadate and lead molybdate arereported at the Tres de Mayo group (USBM file data, no date).A56IIIIIIIIIIIIIIIIIII

i!,,IIIIIIIIIIIIIIIIFor all these localities, the metallization source is likely the Laramide Patagoniabatholith, which may underlie this area at depth, or at least, is only a mile or two to the east.[See mapping by Simons (1974, map) and geology history by Graybeal (1984).]HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Data very sparse.Native Silver prospect was an old abandoned site by the time of Schrader's work(1915, p. 291).Domino Mine group (Lookout claims). Schrader (1915, p. 291 ) documents the DominoMine. It was formerly called the Old Chief Mine. Located in 1881 by A. J. Stockton, andworked via two shafts (83-ft and 62-ft), and stopes from drifts off the 83-ft shaft. Sold toDouglas Gray in 1885 [Mr. Gray probably was the namesake of Gray Camp (see fig. 60), themining camp used for these prospects and the Three-R Mine], who owned it until at least1915. Keith (1975, p. 73) introduces the name "Domino Mine group", and estimates minelifeproduction of 350 st of 56 oz Ag/st, 39% Pb, 1% Cu, and minor Au. The mine operatedbetween 1881 and 1937. The 1880's mining accounted for 250 st of the total ore produced.Modern topographic maps have added the name "Lookout Mine" to certain workingsin the area. Different maps place the name on different mine workings; some of them DominoMine workings, and some of them at other sites to the north. The Lookout claim group,comprised of at least two mining claims, dates from the late 1950's (AGDC, 1958, map).Jarilla Mine (name changed to Jarillas in newer literature) is apparently one of theoldest sites where this type of ore was mined. It was mined by Mexicans prior to 1880; thenopened by a 125-ft-deep shaft by A. J. Stockton of Patagonia, AZ. A few tons wereproduced then, and the site was abandoned by 1886. Further mining ensued over 5 monthsin 1904 and 1905. An abode smelter was used, with very limited success, for part of themine's history (Schrader, 1915, p. 288-289). The smelter, built in 1880, was probably about500 ft SW. of sample site PA504. No slag remains (1994). Keith (1975, p. 73) estimatestotal production at 100 st of 190 oz Ag/st, 37% Pb, 0.1 oz Au/t, and minor Cu; this site waslast mined in 1924.Tres de Mayo group, which encompasses the older Palmetto Mine, is made up ofmining claims (Big Five, Little Giant, Tres de Mayo, and Mayflower) staked along the N. 62 °W. trend of a fissure vein (USBM file data, no date). The site was worked mainly between1910 and 1942, producing approximately 200 st of 70 oz Ag/st, 25% Pb, minor Cu and Au(Keith, 1975, p. 74); Keith's tonnage includes that of the Robert E. Lee Mine, but otherworkers do not consider Robert E. Lee as a part of the Tres de Mayo group. No separateproduction tonnage estimate for the Robert E. Lee Mine is known by USBM. Palmetto Minewas located in 1880 by A. J. Stockton, but there were already old shafts at the site, dug byMexicans, at that time (Schrader, 1915, p. 290).The most recent description of the Tres de Mayo group main workings is that of a 542-ft-deep shaft (likely site PA498-501, fig. 59) with at least four levels. The fourth level (depthunknown) contains 420-ft of drifts and cross cuts and is the most extensively developed level.The shaft was flooded at a depth of 90-ft in 1947 (USBM file data, circa 1947). Shaft in useas a well in 1994; evidence of a former mill site here.Sonoita Mine, located in 1879 by William Keegan, who worked it until 1888 (Schrader,1915, p. 290). From 1916 to 1918, there was more mining. Attempts were made during1966 to find a faulted part of the mined quartz vein on the 125-ft level, reached by a lone,southward-inclined shaft (Moger, 1969, p. 50-51). Life-of-mine production is estimated at500 st of 8% Cu, 11 oz Ag/st, and minor Au, Pb (Keith, 1975, p. 74).A57

ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Ordered by sample number.Native Silver prospect and Big Stick prospect PA352-355 (fig. 60)Examination in 1994 detected no evidence of economically significant metallization.Native Silver site has been reclaimed (C. E. Ellis, USBM, written commun., 1994).Domino Mine group (Lookout Mine) PA356-359 and Ledge prospect (no samples)Sparse field data collected do not permit detailed assessment. The area warrantsfurther examination in the field based on three items: 1) the richness and depth of the silverleadzone at Domino Mine could be of economic interest tithe zone is of considerable width;width is not known; 2) the disseminated copper sulfides condition at the Ledge prospectshould be examined to determine the area of dissemination; USBM field crews examined noneof the prospects there; and 3) the possible long strike length of mineralization if the Ledge andDomino sites are indeed on strike with each other (see fig. 60). Near-surface (40-ft-deep)stoping at Domino Mine (possibly shaft PA359) could result in some surface subsidencehazards.Cox Gulch (lower) prospects PA361-367 (fig. 60-61)Sparse field data collected do not permit a detailed assessment. The metallized quartzstructures themselves, as described in the literature (Schrader, 1915, p. 291-292) do notsuggest economic interest. However, the area should be examined with the idea of notingtype and extent of alteration in the host rocks; possible continuity of alteration and dispersionof metal sulfides between Cox Gulch and the Ledge prospect; and degree of dissemination ofthe copper sulfides, if any.Denver Mine and nearby prospects PA479-489 (fig. 62)Two very narrow, discontinuous quartz veins through the Precambrian complex rockswere mined or prospected at the Denver Mine and other nearby prospects (PA479-485). Thenorthwestern vein, which is continuous between sites PA482 and PA483 and possiblycontinuous as far south as PA484-485, could be 1,200 ft long. USBM samples containsignificant!y elevated silver, lead, and copper concentrations: silver (Ag) was detected in therange of 7 oz/st to over 40 oz/st; lead (Pb) was encountered in the range of 2% to over 20%;copper (Cu) was detected in the range of 2% to over 6%; gold (Au) is present in loweramounts (1 to 5 ppm) (appendix C, D). However, most of the samples are high-grades fromthe dumps, and the lone in-place sample of this vein is devoid of economically significantmetal concentrations.Because the vein is so poorly exposed, no other width measurements are availablebesides PA479. If no more than 1.5-ft-wide, this vein has no economic possibilities. Moger(1969, p. 53) reports several fractures inside adit PA479-481 that are metallized with pyrite,chalcopyrite, sphalerite, and galena, but which are very narrow (8-in.- to 2-ft-wide).The other vein mapped in the Denver Mine area is about 1,000 ft to the SE. (fig. 62).This vein is about 3,000 ft along strike, according to mapping by Simons (1974, map). Twoshafts on this southeastern vein, identified by Simons (1974, map), fall outside the boundaryof fig. 62, and are shown on pl. 1. Data in Moger (1969, p. 35, 53) suggests this vein maybe only 1-ft- to 2-ft-wide, though it is possible that Moger refers instead to the PA482-484vein, which is farther W. If it is so narrow, the vein is of no economic consequence.A58IIIIIIIIIIIIIIIIIII

I!IIIIIIIIIIIIIIIIOverall, the sulfide mineralization in both Denver Mine veins is very sparse (C. E. Ellis,USBM, written commun., 1994).At other prospects to the south (PA486-489, fig. 62), additional silicified fractureswere excavated. USBM field crews did not record their extent along strike, making itimpossible to accurately assess their resource possibilities. The veins have diminished metalconcentrations; none are worth noting beside 2 oz to 3 oz Ag/st and some elevated lead, sothey probably are of no economic consequence. Gold was elevated in sample PA487 (4 ppmAu); this is not unusual in quartz veins in granitic terrane.Sonoita Mine vein PA490-492 (fig. 59)Historical data, commodities present, their grades, and life-of-mine production do notsuggest this site is a viable exploration target. It probably contains only copper and silver inrecoverable amounts. Literature is conflicting as to the metallized trend. Schrader (1915, p.290) reports a N.-S. trend; Simons (1974, map) shows a NW.-trending vein through the mineshaft; Moger (1969, p. 50) reports a vertical, N.-NE.-striking vein at the shaft that follows aquartz monzonite/diorite contact and which is metallized where intersected by a NW.-trendingfracture. C. E. Ellis (USBM, 1994, written commun.) reports a shear zone at the site. Theprobable narrowness of the structure and the low gold content does not encourage furtherexamination of the site. It is highly unlikely that a narrow vein could be worked economicallyfor just silver and copper. Gold content was noted as minor by another investigator (Moger,1969, p. 50-51).Robert E. Lee Mine faults and veins PA493-496 (fig. 59)Metallization at this site is in fracture zones in granitic intrusive rocks 3 as well somequartz fissure fillings (J. R. Thompson, USBM, written commun., 1993). Extent of themetallized structures is not known. Moger (1969, p. 51)reports that there are two mainveins at this mine. These are apparently the veins sampled at sites PA493-494 (fig. 59).USBM sample data suggest the veins are even narrower than the 2-ft- to 5-ft widths reportedby Moger (1969, p. 51). Absence of strike length data prevents a complete assessment ofthe site. However, the facts that no measured structure at the site is over 1.5-ft-wide(appendix B, samples PA493-496) and the recoverable metal concentrations are confined tosilver and lead, with byproduct levels of manganese (appendix C, D) suggest that this site isnot a viable exploration target: The structures are apparently too narrow to mine for thecommodities noted. Gold content was noted as minor (Moger, 1969, p. 51}.Palmetto Mine (later Tres de Mayo group workings) PA497-502 (fig. 59]Schrader (1915, p. 290) notes two mined veins, 300-ft apart, at the Palmetto Mine,and numerous shafts and pits on the structures. These may have been around site PA498or PA502. A later report focuses on a N.62 ° to N. 80 ° W. vein that dips steeply S. (USBMfile data, circa 1947). The largest structure in the area, from Simons (1974, map), is the9,200-ft-long fault that terminates at site PA502. It is clear that this structure is not themined vein of the Tres de Mayo group, but it is interesting that an intersection of the Tres deMayo vein and the 9,200-ft-long fault was projected to exist approximately 600 ft NW. of themain shaft (probably shaft PA498-501) (USBM file data, circa 1947). Such vein-faultintersections can contain wider and/or more heavily metallized zones. It is not known if that3 Moger (1969, p. 51] reports that the host lithologies are the quartz monzonite and diorite complex of the area.A59

intersection was ever encountered by underground excavations of the mine. An opencut withvanadinite and lead molybdate is reportedly on the main Tres de Mayo vein; the opencut is250-ft W. of the shaft (probably shaft PA498-501) (USBM file data, circa 1947).No structure is visible at shaft PA498-502, collared in soil. Few of the otherexcavations noted by Schrader (1915, p. 290) expose any rock (C. E. Ellis, USBM, writtencommun., 1994). The only structural width data are from old USBM file data, reporting thatthe vein is 2-ft- to 30-ft-wide 4. Computation of average vein width and estimation ofcontained tonnage is impossible. The USBM sample PA502 contains slightly over 1 oz/stAg,and over 53% manganese (as Mn). The manganese content might have suggested economicinterest for that metal and byproduct silver, but it has been significantly high-graded. Further,Keith (1975, p. 74) characterized the metallization in this fault as weak and oxidized. Onlysilver, lead, and copper have been noted as economic metals at the site (Moger, 1969, p. 52).The most likely situation is that the USBM sample was collected from an oxidized zonedisplaying significant secondary enrichment. The site probably does not represent aviableexploration target, a conclusion concurred with by an older assessment that is based on lowore tonnage encountered through the composite workings (USBM file data, circa 1947).Jarilla Mine vein PA503-504 (fig. 59)The location of the mined quartz-fissure vein, which trends N. 65 ° E., is reportedlycontrolled by a diorite dike. Banded quartz bearing copper and lead sulfides and minor silverwas the economic target (Moger, 1969, p. 52). The mined vein, partially mapped by Schrader(1915, p. 289) is at least 235-ft-long along strike; crucial data on vein width is lacking.Several shallow shafts on the vein, SW. of PA503 (see fig. 59, pl. 1) contain no evidence ofany economically significant metallization (C. E. Ellis, USBM, written commun., 1994). Theera of mining, the very high grades of silver reported in the mined ores, and the fact that lifeof-mineproduction was only 100 st strongly suggest three things: 1) only oxidized zoneswere economic; 2) the vein is probably very thin (too thin to mine under current conditions);and 3) the vein may have had only spotty metallization.Old Timer Mine vein PA505-506 (fig. 59)Simons (1974, map) mapping of the Old Timer vein shows a 3,000-ft strike length.USBM sample assays from the vein (appendix C, D) suggest that the vein metallization is verysimilar to others in this area: economic silver and lead concentrations, and elevated, but noneconomiclevels of copper and manganese; gold present but not at levels of economic interest.Unless this Old Timer vein is considerably wider than others in the vicinity, it is not a viableexploration target for the future. C. E. Ellis (USBM, written commun., 1994) found noevidence of economic metallization at the site in a spring of 1994 visit.4 Moger (1969, p. 52) notes this structure, which he refers to as the "front range fault"; more importantly, Moger reportedthat fractures oriented N. 60 ° E. control location of metallization, in part, at this mine area.A60IIIIIIIIIIiIIIIIIii

IIIIIIIIIIIIIIIIISample nos. PA368-428 Fig. 3-6Three R Mine group"Three R" name taken from the initials of R. R. Richardson, an early owner andoperator of the mine (Pierce, 1956, p. 1).Includes:Three R Mine, PA382-427 (fig. 3-6);West Side Mine, PA368-381 (fig. 3, 6);Blue Rock No. 8 claim, PA428 (fig. 3).GEOLOGY.Host rock is the Jurassic-age granite of Simons (1974, map), which is porphyriticaround the mined areas, and has been pyritized and undergone argillic-type hydrothermalalteration (Schrader, 1915, p. 284). Mined copper-sulfide metallization is within shear zonesin the host granite. Primary metallization at the Three R Mine group is cupriferous pyrite withminor chalcopyrite, bornite, and lead and zinc sulfides. Important ores formed from thesupergene enrichment minerals chalcocite and covellite, which significantly enhanced the oretenor (Keith, 1975, p. 74).The Three R Mine shear, which is the most extensively explored, is oriented N.-S., anddips steeply W., about 75 ° (Schrader, 1915, p. 284)° It is metallized for 700-ft to 800-ftdowndip and for at least 600 ft and perhaps 800 ft along strike to the north of the Colossusadit, site of samples PA382-421. The adit is 600-ft-long; the shear is 23,000-ft-long(Handverger, 1963, pl. 1 ), extending 13,000 ft beyond the Colossus adit portal to the north,and another 10,000-ft to the south.Another, subparallel shear was mined at the West Side Mine's Gray adit (fig. 3, 6,samples PA368-376). Schrader (1915, p. 287) notes that this structure was up to 30-ftwide,with average metal concentrations of 8% Cu, 8 oz Ag/st, and $4 in Au/st [which isprobably about 1/4 oz,Aulst]. Simons (1974, map) shows a vein-type structure passingthrough the Gray adit on a N. 13 ° E.-bearing, and extending for 1,700-ft along strike, including700-ft to the N. of the adit, and 1,000 ft to the S. Handverger (1963, pl. 1 ) maps this samestructure as 11,050 ft long, extending 3,050-ft N. of the West Side Mine's Gray adit, and8,000 ft to the So The southern extension is intersected by the haulage adit of the Three RMine. It is not significantly metallized there (fig. 4). The disparity concerning strike lengthis unresolved.The Blue Rock No. 8 claim is located on a similar type shear as the Three R Mine, onlythis shear is oriented E.-W. (Schrader, 1915, p. 284). USBM field crews mapped nostructures at the site, so shear width and strike length are completely unknown.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Three R Mine group (PA368-428) was so named by Keith (1975, p. 74) to include theThree R Mine (PA382-427), the West Side Mine (PA368-379), and probably the Blue RockNo. 8 claim (PA428). Only the Colossus adit (fig. 5) was evaluated by USBM. Maps fromHandverger (1963) provided other data (fig. 4). Another adit which was not examined by theUSBM field crews may be a part of the Blue Rock No. 8 claims. As located by Simons (1974,map), it is 800 ft SE. of shaft PA428 (see fig. 3).A61

Copper at the Three R Mine group was discovered in 1897, and developed with severalhundred ft of underground workings between the early 1900'sand 1907. In 1907 or 1908,another 1,600-ft of workings were excavated, and some amount of that was at the Blue RockNo. 8 claim (shaft PA428, or possibly the unsampled adit that is 800-ft to the SE.).Production, in 1908 or 1909, amounted to 4 carloads of ore. Anothe~ 4 carloads wereshipped in 1911, the year in which a wagon road to the site was completed (pack animalswere used previously, which may have been a limiting factor to production). A new operator,N. L. Amster, took over in April 1912, and the first significant production from the mineensued. Amstershipped 30,000 st of ore with 9% Cu (gross value over $1 million in 191 2-1914 dollars) between October 1912, and August 1914. The Colossus adit (PA382-421, fig.4-5) was excavated sometime during 1912. The shaftW, of the Colossus adit portal (fig. 3,4) was 375-ft-deep and of double-compartment design by 1912 S. Amster relinquished hisinterest in the site in October 1914 (Schrader, 1915, p. 282-283, 285) clue to an economicdispute, apparently over royalties (Handverger, 1963, p. 45).A significant amount of mining took place under the direction of the "Harrisoninterests", Houston, TX. Starting date is unknown. Mining rate was as much as 700stpd,through 1918, when operations ceased. The Harrison interests built a 60-st "semifletation"mill on the site to work 3% to 5% Cu ores during their tenure (Handverger, 1963, p. 45). Theproduction tonnage is not documented.The Patagonia-Superior Co. (apparently a Magma Copper Co. subsidiary) took an optionand conducted assessment that resulted in the delineation of 10,000 st of 2% Cu to 3% Cu(Handverger, 1963, p. 45). Magma Copper Co. conducted diamond drilling, undergrounddevelopment, mining, and built a mill on the site in the 1920's. A severe copper price dropled to shutdown (Pierce, 1956, p. 1). Date of the shutdown was not reported, but historyshows a sharp decline in the price of copper in mid-1931; by 1932, many of Arizona's majorcopper operations were closed due to low commodity price (Julihn and Meyer, 1934, p. 54,63). Production over the years following 1914 is only loosely documented. Chapman's data(1944, p. 2) suggests approximately 4,500 st were mined from the time Amster ceasedoperations in 1914, until 1944. This production came from Harrison interest work, fromMagma's operations of the 1920's, and from Duane Bird and C. E. Pierce, who conductedpillar trimming and other scavenger mining early in WWll (Pierce, 1956, p. 2). Mills were setup on the site on two other occasions besides the Magma operation; all had been-dismantledby 1944 (Chapman, 1944, p. 1).The search for a disseminated, high-tonnage copper deposit was initiated in 1950 byKennecott Copper Corp., which conducted a brief examination. Consolidated Copper MinesCo. followed with a comprehensive surface and underground sampling program in 1951,including 5 diamond drill holes. That firm found copper concentrations above the cutoff targetin only the fracture zones, not in bulk-minable zones of rock. Two other lease operationsfollowed in the time up to 1956. They focused on the known, previously mined fracturezones that held copper, and removed the lower-grade ores described by Schrader (1915, p.285) from existing workings. Production of only about 1,100 st is documented. High aluminain the ores caused smelter problems. (See Pierce, 1956, p. 2.)In 1959 and again in 1962, McFarland and Hullinger leased the site and conductedgeologic assessment. They sold their lease rights to the Anaconda Co. in 1963. AnacondaCo. staked many mining claims around the patents and explored for 9 years. Anaconda Co,b The shaft was still open in 1989, to an estimated depth of 200 ft (D. K. Marjaniemi, USBM, written commun., 1989).A62IIIIIIIIIIIIIIIIIII

:IIIIIIIIIIIIIIIIand ASARCO, Inc. began a joint exploration venture in 1972, which ran until at least 1979(Pierce, 1979, p. 1 ). Anaconda Co. conducted a drilling program for copper porphyry duringthis time (J. R. Thompson, USBM, written commun., 1993, data source not documented byUSBM researcher). In the 1960's, ASARCO, Inc., had drilled the West Side Mine area,exploring for a concealed copper porphyry (S. R. Davis, USBM, oral commun., 1994). Acopper porphyry deposit discovery was made (Three R copper porphyry) (Long, 1992, p. 4).Details of its discovery are not known by USBM.Life-of-mine combined production of the Three R Mine group, from 1908 to 1956, wasreported by Keith (1975, p. 74) to be 130,000 st of average 4% Cu with minor Ag, Pb, Zn,and Au. The water table was at the 600 level in 1963 and all levels below that werecompletely flooded (Handverger, 1963, p. 54).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Mine workings except PA380 (fig. 3) are on a mineral patent group (see pl. 1 ). Thereare too many gaps in the field data gathered to permit a complete assessment of mineralresource possibilities for the mine group. The three main shear zones (West Side, Three R,and Blue Rock) were not mapped by USBM field crews. The thesis by Handverger (1963)does not substantially close these data gaps. It is assumed, from USBM sample assays, thatno copper resources are in the shear through the West Side Mine. No resources can bequantified at the Blue Rock no. 8 claim, though the area warrants more complete datagathering. Only the known, historically mined zone in the Three R Mine itself (fig. 4) has beensufficiently documented to allow resource assessment.Literature concerning the Three R Mine provides data from which three somewhatconflicting resource scenarios can be derived. Metallized rock of the Three R Mine that wasconsidered "good" but low-grade copper ore (less that 10% Cu) was reported in the mine inthe amount of 300,000 st (Schrader, 1915, p. 285). This ore is probably equivalent totoday's (1994) measured, subeeonomic resources category; it is mainly down dip and belowthe Colossus adit (fig. 4-5). Comparing life-of-mine production from Keith (1975, p. 74),130,000 st, and recognizing that: 1 ) at least some part of that 130,000 st life-of-mine totalproduction came from the West Side Mine and the Blue Rock No. 8 claim; and 2) over 30,000st had already been mined when the 300,000 st resource estimate was made, it can be seenthat as much as 2_00,000 st of Schrader's (1915, p. 285) "good, lower-grade ore" mightremain in the mine, mostly below the Colossus adit. Chapman (1944, p. 2) estimatedbetween 90,000 st and 127,000 st of indicated reserves of 2.7% Cu in the Three R Mine.Incomplete historical data does not clarify whether these tons were mined out later. The mostrecent assessment of the mine (Pierce, 1979, p. 1 ) described the site such that it appears theblocks of 2% + Cu-bearing rock remaining in the mine are small and perhaps discontinuous.The fact that most of the monetary return from the life of this mine came from just 40,000st of ores (Handverger, 1963, p. 45) indicates that, for the most part, only very high-graderock was mined. With such conditions, coupled with the tonnage uncertainties, no reasonableresource estimates can be made for an underground mining scenario.In-situ recovery of copper from the site may be a viable concept. Favorable factorsare: 1) rather high-grade remaining blocks of copper-bearing rocks (2% Cu) in a wide fracturezone (5-ft to 40-ft in width) (Pierce, 1979, p. 1 ; Chapman, 1944, p. 2); 2) high-gradewallrock(1% Cu) and significant width of Cu metallization into the wallrock (100 ft) (Handverger,1963, p. 46; Pierce, 1979, p. 1); 3) significant plumbing through past mining and drilling(10,000 ft of old excavations) (Chapman, 1944, p. 2); and 4) a possible large area that canA63

e leached. The USBM model for development of this zone through in-situ leaching isdescribed below.Geologic assumptions relative to the in-situ leach model.Resource block dimensions: 700-ft along strike and about 700-ft to 800-ft down dip (basedon data in fig. 4 and descriptions in Schrader (1915). A combined width of 40 ft,comprised of 10-ft of the historically mined ore zoneand another 30-ft for metallizedwallrock (which is conservative) [see Schrader's (1915, p. 284) and Chapman's (1944,p. 2) descriptions]. This is about 2_1 million ft 3 of rock.Tonnage factor: 12 ft3/st.Total tons in resource block: 1.6 million st (1.75 million st minus about 0.1 million st of pastproduction from the Three R Mine.Grade: 1.25% Cu, a conservative estimate, not quantified through assays.Amount of resource block accessible for in-situ mining: rock below the sill of the 400 leveland above the back of the 800 level, a down-dip distance of 380-ft. The 900 level isassumed to be too short in length to act as a leachate collection sump, so the nexthigher drift level is the greatest depth to which leachate can be collected usingavailable old workings. This leaves an in-situ mining resource block that is 700-ft-long,380-ft-deep, and40-ft-wide: 10.64 million ft 3 or 890,000 st. Another 20% of theseresources could be inaccessible; the USBM model assumes that the 700 level driftingcurrently extends for 200-ft to the S. and for 165-ft to the N. of the extents shownon the pre-1919 era longitudinal section map (fig. 4).Total in-place copper in the in-situ mining resource block: 22.25 million Ib Cu (1.25% of890,000 st).In-situ mining andleach plant recovery factor: 35% of total Cu present.Recoverable Cu (via in-situ leaching): 7.8 million lb.Permeability to leach solution: Untested but assumed to be high based on report of openfractures (Handverger, 1963, p. 46) and the shear-zone structure of the overallresource zone.Precipitate forming potential: Untested but certainly moderate to high, based on the presenceof a high percentage of pyrite in the ores (quantity not measured), which will form ajarosite precipitate as the in-situ leaching process proceeds, and destroy permeabilityto the leachate. Carbonate content is low; gypsum formation unlikely.Leachate containment capabilities: Unknown, untested; assumed to be favorable because ofnature of wallrock (granite).Mine and mill modelsIn-situ leach mine life: 2 years (short due to presumed loss of permeability after 2 yearsoperation).Mine development method: Drill fan pattern of 6 holes from a station downward to within 10ft of the next lower level, avoiding old stopes. Space stations 50 ft apart. Build bulkheadsthat will block off the main shaft and old stopes and use the barricaded old drifts as sumpsfor leachate collection. Deliver the acid leach solution to the resource blocks via gravity feedthrough the fan-pattern hole sets. Pump pregnant leach solution (pls) to the surface.Drill fan-pattern hole sets at 9 stations inside the 400 level (see fig. 4) and one station at the400 level, but outside the mine on the topographic surface, about 60-ft S. of the Colossusadit portal. Combined drilling of 7,365 ft in 59 holes. Maximum hole depth will be 180-ft.There are 165 ft between the 400 level and 600 level. This will leach the copper resourceA64IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIbetween the 400 level and the 600 level. Build and utilize sump on the 600 level. Then, drillfan-pattern hole sets at 14 stations on the 600 level. Maximum hole depth will be lO0-ft.There are 100 ft between the 600 and 700 levels. Combined drilling of 7,025 ft in 81 holes.This will leach the copper resource between the 600 level and 700 level. Build and utilizesump on the 700 level. Drill fan-pattern hole sets at 12 stations inside the 700 level.Combined drilling of 6,450 ft in 72 holes. Maximum hole depth l O0-ft. There are 93 ftbetween the 70 and 800 levels. This will leach the copper resource between the 700 and800 levels. Build and utilize sump on the 800 level.Utilize waters which currently flood the mine for their copper content and re-utilize forin-situ leach process. Handverger (1963, p. 54) reported flooding had reached the 600 level,but it was still accessible. A 1989 USBM visit noted the shaft was open to 200-ft in depth,which is a point between the 600 and 700 levels. The water table may have fallen.Construct two gravity dams from existing mine waste on the property and clay. Pump theflood waters from the mine, channeling them over collections of scrap iron to precipitatecopper cement. Then store the waters in the constructed reservoir for further use in the insituleaching process.Production grade: targeted at 1.0 g/I (leachate grade minus raffinate grade).Production rate: 1,335 gal/min in first year and 445 gal/min in second year. This allows fordecrease in permeability over time due to deleterious chemical precipitates resulting from bothunwanted chemical reactions and biological leaching in the resource zone during the in-situoperation. The rates are calculated on the formula of: no. grams recoverable copper/yrdivided by the product of (1 g/I) (3.785 I/gal) (365 days/year) (24 hours/day) (60minutes/hour). The total number of grams of recoverable copper from the deposit 3.54 billion.Mill method: SX-EW (solvent extraction-electrowinning). Build an SW-EX plant on site torecover the leached copper.Mine capital costsCosts1). Gravity dams (2), bentonite core, each retaining 15 acre-ft of water;covered with old mine dump material; one dam 400 ft wide and one200-ft-wide; for surface impoundment of mine waters (10.2 million gal total).Dollars150,000'2). Refurbish 165 ft of main shaft between 600 and 800 levels;assume 50% needs refurbishing; rate is calculated at $1,170.51/ft. 97,00023). Refurbish 2,415 ft of drifts on 600, 700, and 800 levels.Part 1, clearing drifts (10% of the total drifts, or 240 ft)Part 2, roof bolting at 36 intersections (7 bolts/intersection)252 bolts at $3.18 per bolt & $0.40 resin/bolt; laborrate $13.00/hour; assume bolts installed at rate of 2/hour.4) Roof bolter, used (calculated at 75% of new price).5). Ten bulkheads to convert existing drifts into pls collection sumps(8-ft by 6-ft, 12-in.-thick, steel-reinforced bulkheads built by contractor;(rates: $5.09fft ~ for all materials; 0.2 hours labor/ft2; contractor overheadand other fees at 50% of labor; totalling $570/bulkhead).6). Mine hoist (capacity 6 st; maximum height of lift 1,000-ft);calculated at 50% of the price of a new hoist; cost includes installation.7). TransformerA6528,00032,500469,00045,700 s645,0004included with mill capital cost

8). Dewatering pump (required capacity 9.7 gal/min over 380 ft maximum head);quoted cost is tor 10 gal/min pump at 440-ft head; 12 HP.9). Hose for dewatering (2,000 ft, diameter: 3-in.);(calculated at price of 3-in. PVC irrigation hose, $2.41/ft.10}. Distribution system for barren leach solution2,600 ft of 1-in. diameter PVC irrigation pipe,in-part perforated; distributed via sump system;(calculated at $2/ft}.11). Reagents12). Sump pumps (2); required capacity (combined) is668 gal/min over 380-ft maximum head (vertical);quoted cost is for 400 gpm pump at 400-ft head (60 HP)which uses 2-in. diameter output pipe.13). Stainless steel piping, 2-in. diameter, fordrawing pls up the shaft via the 2 sump branches;380-ft/sump branch, 40S, calculated at $1,523.93/100 ft,installed.14). PVDF piping, 2-in. diameter, to move pls fromshaft collar to plant; mounted on pipe rack, installed;1,600ft for each of 2sump branches. Quoted at$2,190/100 ft materials and 105.96/100 ft installation charge,15). Contract drilling for 20,870 ft of leach holes(212 holes, 2 3/8-in. diameter); rate of $25/ft.16}. PVC casing for the upper 20 ft of each leach hole(2 3/8-in. diameter); 4,240 ft, total at $2.40/ft.17). Scrap iron (already on property}.18). Water (use mine flood water present on the site).Mine operating costs.1). Operation of dewatering pumps; it is assumed these costsare covered by revenue from recovered cement copper presentin mine flood waters.2}. Operation of sumps (life-of-mine} based on:first year costs of $51,168 for electric power ($5.26/hour) 8 andcombined other operation costs in the first year of $852,786 ($97.35/hour)7;then $11,167 ($1.15/hour) e for electric power in the second year and$367,570 ($41.96/hour) 7 for combined other operation costs in the second year.A66Total mine capital costTotal mine operation cost6,00044,80045,2004included with mill costs14,400511,600 ~73,500 ~522,000110,20041.64 million0001.28 million1.28 millionIIIIIIIIIIIIIIIIIII

Mill capital costs.1 ). SX (solvent extraction) plant, 1,335 gal/min capacity.2). EW (electrowinning) plant, 5.85 million lb Cu annual capacity.Total mill capital cost4.12 million 72.17 million 76.29 millionMill operating costs.1 ). SX plant (life-of-mine)based on $2,906/day ($1,035,000/yr) or $0.177/Ib Cu through first year of mine life.This cost rate per Ib Cu assumed to be same during the second year of operation,resulting in costs of $345,000 over the second year of operation.2). EW plant {life-of-mine)based on $2,597/day ($925,000/yr) or $0.158/Ib Cu through first year of mine life.This cost rate per Ib Cu assumed to be same during the second year of operation,resulting in costs of $308,000 over the second year of operation.Total mill operation costTotal calculated expenditures1,380,00071,233,00072.61 million11.82 millionOther costs, not calculated.1 ). Environmental impact Statement preparation and process2). Mining permits3). Hydrologic study4). Permeability studies5). Test leach panel6). Aquifer protection monitoring wells7). TaxesRevenues1 ). Copper, total 7.8 million Ib, price of $0.90/Ib.2). Salvagea). SX plant, based on 92.8% of thecapital cost as "equipment", andsale of that equipment at 75% ofthe purchase (new) price;b). EW plant, based on 72.5% of thecapital cost as "equipment", andsale of that equipment at 75% ofthe purchase {new) price.c). Hoist, 50% of purchase (used) price.7.02 million2.87 million 71.18 miUion 7322,000A67

d). Roof bolter, 75% of purchase (used) price.e). Sumps, 50% of purchase (new) price.f). Dewatering pump, 50% of purchase (new) price.Total revenueFootnotes:Rates from Mike Gobla. USBM. 1994. oral commun. Costs in 1994 dollars.2From Stebbins (1992}, Costs in 1992 dollars.SFrom Stebbins [1990), Costs in 1990 dollars.From Western Mine Engineering, Inc. (1993). Costs in 1993 dollars.From Richardson Engineering Services, inc. (1994). Costs in 1994 dollars.BBasedon formulae and constants from USBM CES (Cost Estimation System} on Lotus 123. Costs in 1993 dollars.Based on USBM regression analysis formulae for solvent extraction and electrowinning plant models Costs in 1993 dollarsaFrom U.S. Bureau of Mines (1987a, p. 352-353]. Costs in 1985 dollars,52,0007,0003,00011.4 millionConclusion. Estimated revenue over the mine life would be exceeded by the projected costsestimated above. Other cost categories listed above, for which specific costs were notcalculated, would negatively impact the property economics even further.Other copper resources. Historical references to the structure at the Blue Rock No. 8 claim(fig. 3), coupled with the USBM observation of a very deep excavation there (see descriptionof sample PA428) suggests that structural data should be gathered at the site to see if it maybe of a size that would warrant leaching.Mill railings and mine waste. There are "less than 6,000 st" of mill tailings (C. E. Ellis, USBM,1994, oral commun.) at site PA422-427 (fig. 3). The direct-shipping or direct-flotation natureof the ores and their low gangue content accounts well for the fact that there is very little atthe Three R Mine area in the way of mine dump. USBM field crews made no estimates of thedump's tonnage. Dumps are scattered and no composite estimate was calculated by USBMfield crews. Photographs taken during more recent work in the area (1994) suggest no morethan about 30,000 st of dump material is in vicinity of the Three R mine group.Environmental issues. Placement of the tailings and mine dump in the drainage bottom ofuppermost Three R Canyon has resulted in solution, migration downstream, and precipitationof copper-bearing chemical compounds in the stream bed of Three R Canyon for somedistance downstream of the Three R Mine's tailings and mine dump. Both dump and tailingshave been heavily eroded by stream action over the years, which enhanced movement ofcopper and acid into the Three R Canyon stream environment.The physical evidence is a distinctive blue chemical coating along the stream bed. Thisis quite to be expected, for several reasons. The high pyrite content of the original ores willallow for a high pyrite content in both tails and dump accumulations. Pyrite readily forms acidwaters when it comes in contact with the oxygen in air; pulses of acidic water wouldtherefore be common during wet seasons. The acidic product from the pyrite will readilydissolve copper and put it into solution. The supergene (or secondary) nature of much of thecopper in the ores mined (chalcocite) allows that it will be even more readily dissolved thanif it had remained in its initial form (in pyrite, or as bornite or chalcopyrite). The blue color onthe stream bottom is most certainly one form of copper sulfate mineral, which reacted withother minerals or chemical compounds in the water or on the stream bed, and came out ofsolution and back into a visible, solid form.A68IIIIIIIIIIIIIiIIIIi

IIIIiThis process will continue until such a time as: 1) all the copper is removed from thedump and tailings by natural erosion, weathering, and dissolution processes; 2) the railingsand dump are isolated from air and water (containment and burial, an expensive proposition);or 3) the material is removed from the site to be "remined" or reprocessed to recover theremaining copper as a mineral resource. Grades encountered in sampling of the tailings(PA422-427) average at least 0.6 or 0.7% Cu, two samples exceed 1% Cu, but were notreassayed at higher detection limits to determine their exact copper content (appendix C, D).Some design of heap-leach of the tailings could reduce copper levels significantly, but theremaining material, which would be of about the same tonnage as now, would still have tobe removed or buried/isolated from the environment.:'HiA69

Sample nos. PA430-454 Fig. 3, 10European Mine groupGEOLOGY.Narrow faults and quartz veins are hosted in Jurassic-age granitic rocks that containdisseminated pyrite. Copper concentrations reach several percent in a few samples, but mostare far below 1% Cu; silver is erratically distributed, not exceeding a few oz Ag/st. Thosemetals are confined to the westernmost workings of the mine group. Metal concentrationstail off considerably in the eastern and southern workings.Metallization is related to the intrusion of the underlying Ventura copper-porphyrydeposit and the nearbyVentura copper-moly breccia pipe deposit. Emanation of copper andsilver outward from those large deposits is to be expected.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Keith (1975, p. 73) reports the sites were worked sporadically between 1913 and1929 for 320 st of average 10% Cu, 4 oz Ag/st, 0.1 oz Au/st.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Areas of disseminated pyritic metallization do not contain significant concentrationsof economic metals. Metallized quartz veins and fractures are too narrow, with too lowtonnages to consider for mineral exploration or development.A70IIIIIIIIIIIIIIIIIII

iiIIIIIIIISample nos. PA455-463 Fig. 3, 8Unnamed prospect in breccia pipeGEOLOGY.A breccia pipe (fig. 8) hosted in Jurassic-age granitic rock was intersected by aprospect adit. Numerous breccia pipes are present in this area and upper Cox Gulch, whichis on the other side (SW.) of the ridge line. No significant metal concentrations wereencountered with USBM samples. The nearby Ventura copper-moly breccia pipe deposit (fig.3) contains much higher (though subeconomic) concentrations of copper and molybdenum.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Although USBM sampling of the breccia pipe is limited, there are no indications thatadditional examination is warranted. Even if copper or molybdenum concentrations increasewith depth, the size of this breccia pipe is small; other breccia pipes in the immediate vicinityrepresent more viable exploration targets because of their larger size and potential tonnage.'~1 ....i!1 .¸~, ~;~,~i! ~-i I ~ ~/?~111~ii~ ¸ !! ~A71

Sample nos. PA464-466 Fig. 3Ventura MineGEOLOGY.Drifting was undertaken in Triassic-age volcanic rocks of intermediate composition(Payne, 1977, map); intrusive rocks were noted at site PA464-466 (J. R. Thompson, USBM,written commun., 1993). The very limited look at the Ventura Mine workings shows veryhigh concentrations of silver, lead, and zinc, and some copper in both vein quartz and inpyritic stockwork through acid intrusive rock. All these samples are from rock on the dumpof the small adit (appendix C, D).Metallization is a distal relation to the intrusion of the underlying Ventura copperporphyrydeposit and the nearby Ventura copper-moly breccia pipe deposit (fig. 3). Emanationof lead, zinc, silver, and copper outward from those large deposits is to be expected.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The Ventura Mine itself (fig. 3) consists of over 800-ft of underground workingsbetween the adit that is about 500 ft SW. of adit PA464-466 and the unsampled shaft at thehead of Cox Gulch (Payne, 1977, map). Flooded adit PA464-466 (fig. 3) was open for 150ftin 1977, at which point theadit had caved (Payne, 1977, map). By 1994, the mainaditof the Ventura Mine (unsampled) had also flooded. The dump outside that adit contains107,000 ft 3 of rock, or about 5,500 st (C. E. Ellis, USBM, written commun., 1994).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.No assessment is possible because the major structures of the mine are inaccessibledue to flooding. Metallization is significantly elevated in the lone dump that was sampled.Economic significance of that metallization will be based entirely on width of the metallizedzone (be it vein or disseminated through intrusive rock) and overall tonnage. It is unlikely thatvein-type deposits are present here with large enough tonnages to warrant mineral explorationor development. However, the main part of the Ventura Mine must be examined in order tomake that statement conclusively.A72IIIIIIIIIIIIIIIIIII

IIIIIIIiISample nos. PA467-474 Fig. 3, 11Cox Gulch (upper) prospectsGEOLOGY.Narrow faults and quartz veins are hosted in Jurassic-age, acid, intrusive rocks thatcontain pyritic stockwork. Copper concentrations reach several percent in a few vein quartzsamples, but most are below 1% Cu; silver is erratically distributed, but some samples contain5 oz to 25 oz Ag/st (appendix D). Gold content is also slightly elevated, relative to the region;a few samples contain 1 ppm Au.Metallization is related to the intrusion of the underlying Ventura copper-porphyrydeposit and the nearby Ventura copper-moly breccia pipe deposit. Emanation of copper andsilver outward from those large deposits is to be expected.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Description of the workings in Schrader (1915, p. 291-292) suggests no production,and no large-tonnage veins.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.These metallized quartz veins and fractures are far too narrow, with far too lowtonnages to consider for mineral exploration or development. No vein over 4-ft-wide wasfound. Their greatest value has been realized: they are indicators of a copper-porphyryenvironment at depth; that deposit has been discovered (Ventura copper porphyry, fig. 3).i::!~ ¸ mm|).A73

Sample nos. PA475-478 Fig. 3Zinc Adit groupGEOLOGY.Three adits were driven in Jurassic-age granite (Simons, 1974, map) with disseminatedpyrite, and quartz veins with abundant pyrite, galena, sphalerite, and arsenopyrite. Two ofthe adits were examined by USBM and those workings were inaccessible. No mapping of theveins or metallizedzones was attempted on the surface. The few samples collected at thesite reveal elevated silver, lead, and zinc, with over 3 ppm gold in places (appendix C, D). Allsamples were collected from dump material.Metallization is related to the intrusion of the underlying Ventura copper porphyrydeposit and the nearby Ventura copper-moly breccia pipe deposit. Emanation of silver, lead,and zinc outward from those large deposits is to be expected.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Adits excavated sometime prior to 1977 (Payne, 1977, map).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.No assessment is possible without data concerning the width or extent along strike ofthe metallized veins and areas of disseminated metallization. Contained metal values are veryhigh in dump material. Economic significance of that metallization will be based entirely onwidth of the metallized zone (be it vein or disseminated through intrusive rock) and overalltonnage. It is unlikely that vein-type deposits are present here with large enough tonnagesto warrant mineral exploration or development. However, that statement cannot be madeconclusively with the sparse data collected on the structures.A74IIIIIIIIIIIIIIIIIII

IIIDATA FOR SAMPLES PA479-506ARE ON PAGES A56-A60 OF THIS APPENDIXiii,i; i I ~iJ-ii!~ ¸ ,ii- '" :, '~i :''~~ i',,~!lA75

Sample nos.PA507-529 GPA564-6017PA628-7078PA716-718Fig. 29, 47-58Metallized structures in granodiorite of Patagonia batholithIncludes:O'Mara Mine vein and associated prospects PA507-514 (fig. 57-58);Unnamed fault PA515 (fig. 50);Unnamed quartz vein PA516-517 (fig. 50);Homestake Mine vein PA518-519 (fig. 50);Jackalo-Paymaster quartz vein PA520-528, 564-581 (fig. 50, 52), including Enterprise Mine(fig. 51), Paymaster Mine (fig. 50), and Jackalo Mine (fig. 53);Guajolote Mine vein PA529 (fig. 50);Unnamed structure PA579 (fig. 52);Pronto Mine vein PA582-589 (fig. 52);Gladstone Mine vein PA590-596 (fig. 52);Gross prospect PA597-598 (fig. 52);Marche prospect, no samples (pl. 1);Minnesota Mine vein PA599-601 (fig. 52, 54);Big Lead Mine vein PA628-632 (fig. 55);Golden Rose Mine vein PA633-635 (fig. 55);Specularite prospect fault PA636-637 (fig. 55);Bennett Mine vein PA638-641 (fig. 55, 56);Buena Vista Mine-King Mine vein PA642-707 (fig. 47-49)Edna Mine group (in part) PA716-718 (fig. 29, & pl. 1)Unexamined localities (see p. A83).GEOLOGY.O'Mara Mine vein: east-trending quartz vein, as much as 5-ft-thick, in local quartzmonzonitephase of the granodiorite of the Patagonia batholith (Schrader, 191 5, p. 308-309;Simons, 1974, map), containing copper, silver, and gold concentrations in chalcopyrite,bornite, and pyrite. The sulfides also impregnate the granitic wallrock.Buena Vista, Homestake, Gladstone, Guajolote, Marche, Gross prospect, Pronto,Jackalo-Paymaster, unnamed PA579, unnamed PA515, unnamed PA516-517: northeasttrendingfaults, some with quartz vein fillings, many with alteration along the fault (probablyhydrothermal). All structures dip to the southeast. Narrow veins, usually less than 3-ft-wide,with extensive strike lengths (1,000 ft to 10,000 ft, where mapped). Ores were metal sulfideminerals.Big Lead, Bennett, Golden Rose, Specularite: vein-quartz filled fractures in contactareas of granitic, diorite, and porphyritic phases of the Patagonia batholith. Fractures trendN. 70 ° E. to east-west. Base-metal sulfide minerals.6 Descriptions of sites PA530-563 follow on p. A84-A91.7 Descriptions of sites PA602-621, 624-627 follow on p. A92-A94.8 Descriptions of sites PA708-715 follow on p. A92-A94.A76IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIiIIEdna Mine group PAT16-718: fault zones, some silicified, through quartz monzonitephase of the Patagonia batholith (Simons, 1974, map) are mineralized with scheelite. Theoccurrence is described as sporadic and pockety, with molybdenite and copper carbonates.Vein quartz and gouge are oriented along a N. 30 ° W., NE. 34 ° trend. Scheelite formedpreferentially where a shear (N. 73 ° E., NW. 78 ° ) intersects the northwest-trendingfault/quartz vein. Continuity along strike is reportedly "considerable" (Dale and others, 1960,p. 120-122).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Data very sparse.O'Mara Mine and prospects (PA507-514), originally the Old Soldier Mine, was workedbeginning in 1888, and was idle in 1909. It contained 2,000 ft of underground developmentsin 1915, some of which are shown on the mine map (fig. 58) (Schrader, 1915, p. 308). Nodata are known after 1909. The site is erroneously referred to as the O'Maras Mine onmodern topographic maps.Gladstone Mine (PA593-594) was the largest producer from vein deposits in thePatagonia batholith. Between the early 1900's and 1951,2,000 st were mined, with average8% Cu, 3 oz Ag/st, 0.1 oz Au/st, minor Pb in irregular vein with spotty chalcopyrite, oxidizedcopper minerals, minor galena and sphalerite (Keith, 1975, p. 80).Marche prospect (no samples; see pl. 1 ) was noted by Schrader (1915, p. 316). Twoadits were driven on a 2-ft-wide, crushed quartz vein and gouge zone with malachite andazurite, and an absence of sulfide minerals. These workings were not examined by USBMfield crews. The site is about 0.5 mi SW. of the Minnesota Mine (fig. 52).Buena Vista Mine (PA646-706) produced 850 st of 3% Cu, 1 oz Ag/st, minor Au andPb from irregular quartz-calcite veins and mineralized shear zone granodiorite. Mineralsincluded pyrite, chalcopyrite, bornite, minor molybdenite, and some covellite and galena at thesurface. Intermittent mining from late 1800's to 1958 (Keith, 1975, p. 75). Most of theproduction was in 1897 to 1898, when 524 st were produced (Schrader, 1915, p. 314).King Mine (PA642-645) data are mostly lacking; mining had taken place by 1915(Schrader, 1915, p. 316). Highly pyritic material excavated from shaft (C. E. Ellis, USBM,written commun., 1994).Pronto Mine(PA582-586) produced 1,200 st of 8% Cu, 3 oz Ag/st, minor Pb, Au fromquartz vein in shear, with spotty chalcopyrite, pyrite, minor galena. Mined beginning in early1900's (Keith, 1975, p. 81).Paymaster Mine (PA527-528) produced 130 st of 7% Cu, 8 oz Ag/st, minor Au fromquartz vein in shear with chalcopyrite, bornite, pyrite, arsenopyrite, galena, sphalerite. Somesupergene enrichment at surface (Keith, 1975, p. 81). Mining era unknown.Guajolote Mine (Quajolote, Bacon) produced 300 st of 2% Cu, 3 oz Ag/st, 0.2 oz Au/stfrom quartz vein with chalcopyrite, pyrite, copper carbonates between late 1930's and early1940's (Keith, 1975, p. 80).Big Lead Mine was developed by 1915 (Schrader, 1915, p. 312).Golden Rose Mine was developed by 1915 (Schrader, 1915, p. 313).Bennett Mine was developed by a 200-ft-deep shaft by 1915 (Schrader, 1915, p.313).Specularite prospect was opened by 1915, and considered then as a source of silicaflux for smelting processes (Schrader, 1915, p. 312).Edna Mine group (name is from Keith, 1975, p. 76) was only partially examined byUSBM field crews. Workings PA716-718 are only part of the total mine workings. OtherA77

sites are shown on pl. 1 to the NE. and S. of fig. 29 boundary. The area consisted of 160tungsten mining claims owned by Coronado Mines, Inc., in the 1950's. Previously, they hadbeen staked bya prospector simply known as "Julio". A few units of tungsten productionwere mined prior to 1914. Other production took place in 1968 to 1971, when 240 tons(long tons?) of 1.3% WO3 were mined (Dale and others, 1960, p. 122; Keith, 1975, p. 76).The Martha Washington claim, one of the 160 claims that comprised the group, is in NE. 1/4,sec. 12, T. 24S.,R. 15 E. It was examined forscheelite (Dale, 1960, p. 120-122). USBMfield crews studying the Coronado National Forest in 1990-1991 did not visit that claim.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Ordered by sample number.O'Mara Mine and nearby prospects PA507-514 (fig. 57-58)The O'Mara Mine vein occurs in a granodiorite phase of a quartz-monzonite part of thePatagonia batholith (Simons, 1974, map; Schrader, 1915, p. 308-309). Rock on the hillwithin 1,000 ft to the NE. has been intruded by numerous aplite structures. Rock immediatelysouth has been altered(Simons, 1974, map). Simons' mapped alteration area (fig. 57) mostlikely represents a high-pyrite area, and therefore a hydrothermal alteration zone.The 5-ft-wide O'Mara Mine quartz vein, apparently striking slightly north of east (fig.57), dips SE. 70 ° (Schrader, 1915, p. 308). It was excavated down dip for 250-ft at theO'Mara Mine (PA507-510, fig. 57, 58), and field data indicate that the strike length is at least1,350-ft, though no mapping of the vein was undertaken either west of site PA507 or eastof site PA513 (see fig. 57). Vein thickness is apparently consistent at 5-ft, between sitesPA507 and PA513 (Schrader, 1915, p. 309). These dimensions allow an estimate of140,000 st in the known part of the vein. This vein consists of bands of quartz with sulfideminerals (pyrite, chalcopyrite, bornite), and there are intergrowths of pyrite and the quartz,from which copper, silver, and gold were recovered (Schrader, 1915, p. 309).USBM samples from the O'Mara Mine vein do not contain enough metal concentrationsin copper, silver, or gold to warrant further economic interest. Most of the samples are select,and therefore probably are high-grade, yet the maximum copper concentration detected is0.7% Cu. Some samples contain about 1 oz to 2.5 oz Ag/st, and as much as 1.5 ppm Au.Underground vein mining for metal concentrations this low is not economic. The sample froma fracture zone in granodiorite (PA51 2) contains over 1% Pb and about 1.5 oz Ag/st, but nodata were collected concerning the extent of this fracture. If it is of no greater width thansample PA51 2 (3 ft), it does not have any economic potential for development.A complete assessment of the area should include other workings located by Simons(1974, map). Those which may actually be roadcuts or may be obliterated by recent roadcutsare not shown on fig. 57. Two adits mapped by Simons (1974, map) to the south of theinset map containing the O'Mara Mine are shown on pl. 1.Unnamed fault PA515 (fig. 50)Width, extent of fault unknown; assessment not possible.Unnamed quartz vein PA516-517 (fig. 50}Width, extent of quartz vein unknown; assessment not possible.A78IIIIIIIIIIIIIIIIIII

nIIIIIIIIIIIIIIIIHomestake Mine vein PA518-519 (fig. 50)Quartz vein is at least 250-ft-long, based on locations of the two samples, but veinwidth unknown; assessment not possible..Jackalo-Paymaster quartz vein PA520-528, 564-581 (fig. 50, 52), including Enterprise Mine(fig. 51), Paymaster Mine (fig. 50), and Jackalo Mine (fig. 53)A small part of this 10,000-ft-long quartz vein was sampled by USBM, primarily alonga 1,150-ft-long segment at and near the Jackalo Mine. The vein is very narrow and has lowCu (0.9%) and Au ( 1.2% Cu andtwo of the eight containing > 2% Cu. However, the samples are mostly select, and thereforeprobably high-graded. Gold content is low, not exceeding 0.2 ppm Au, and can be eliminatedas an economic consideration. Keith's (1975, p. 81) note that mineralization is spotty is notencouraging. Only. 1,200 st were mined;from this vein.What is known about the vein's low tonnage, narrowness, and low gold content wouldeliminate its possibility for development as a copper resource.Gladstone Mine vein PA590-596 (fig. 52)Mapped as an 2,400-ft-long quartz vein (Simons, 1974, map). USBM sampled onlythe northern end. Sample PA592 is the only measured vein width (3 ft). Down dip extentis 450 ft, based on examination of the ends of the vein in relation o the topographic surface.These dimensions allow estimation of an inferred tonnage of 270,000 st (using 166.5 Ib/ft 3• for the vein density).Grade of copper is variable, with < 1% Cu in four of seven samples, but > 3% Cu inthe other three samples. Samples are nearly all select type, allowing only a rough estimationof average grade in the range of .1.5% Cu. The gold content is too low for economicconsideration, at 0.2 ppm, maximum. Silver is present in concentrations of 1 oz Ag/st ormore in most samples. Keith's (1975, p. 80 note that mineralization is spotty is notencouraging. Only 2,000 st were mined from this vein.A79

What is known about the vein's low tonnage, narrowness, and low gold content wouldeliminate its development for copper/silver resources.Gross prospect PA597-598 (fig. 52)Width, extent of this quartz vein, which parallels the Minnesota Mine vein, is unknown;assessment not possible.Minnesota Mine vein PA599-601 (fig. 52, 54)Mapped as an 1,800-ft-long quartz vein (Simons, 1974, map), but USBM sampled onlythe northern end. In addition, there are three 500-ft-long, subparallel segments of this veinto the west (Simons, 1974, map) that were not examined by the USBM. Sample PA599 isthe only measured vein width (3 ft). Down dip extent is 370 ft, based on examination of theends of the vein in relation to the topographic surface. These dimensions allow estimationof an inferred tonnage of 166,000 st (using 166.5 Ib/ft 3 for the vein density).Grade of copper is high, and variable, with 1.3% to 13.3% Cu in the three samples,but the samples are nearly all select type, and therefore probably high-grade, and they are avery limited look at the strike length of the vein. The gold and silver content are negligible.What is known about the vein's low tonnage, narrowness, and low precious metalscontent would eliminate its development for copper/silver resources, but it cannot becompletely ruled out as an exploration target, mainly because so much of its length was notexamined by USBM.Big Lead Mine vein PA628-632 {fig. 55)This mine was worked for a 25-ft-wide lode comprised of a N. 75 ° E-trending, vertical,shear zone with a 3.5-ft-wide quartz vein. The zone includes a granite porphyry dike and thehost rock was described as diorite. Sulfide minerals identified in the lode include galena andchalcopyrite, from which silver and gold were sought (Schrader, 1915, p. 312). Surficialgeologic mapping plots this site in Jurassic-age granitic rocks near the contact with thePatagonia batholith, but the data from the mine (Schrader, 1915, p. 312)indicate that thehost is a dioritic phase of the Patagonia batholith. The structure has been mapped along strikefor 4,200 ft and shown to post-date the Jurassic rocks (Simons, 1974, map). Data do notexist to demonstrate down-dip extent. High-grade samples show very high levels of lead,silver, and copper, and enough gold for consideration as a byproduct. However, thecontinuity of vein width, and continuity of metal concentrations to the east is not known. Noassessment is possible with the sparse field and historical data. Further examination of thestructure may be of value, because the vein, although thin, may have enough silver to still beof interest to modern mining concerns. Proving continuity of the metallization on strike anddown dip is essential for any complete evaluation of this structure.Golden Rose Mine PA633-635 {fig. 55}A 16-ft- to 20-ft-wide silicified zone, oriented N. 70 ° E., SE. 70 °, occurs at the contactof diorite and granite porphyry. The zone contains chalcopyrite, galena, and stephanite in analteration zone. Ore shoots that were worked averaged 3-ft-wide, and reached 12-ft in width(Schrader, 1915, p. 313). The described wall rock alteration and leached quartz structuresstrongly suggest a hydrothermal alteration zone around this structure. The site may be at thecontact of Jurassic rocks and a dioritic phase of the Patagonia batholith (Simons, 1974, map).A USBM sample (PA633) of in-place fault gouge at the caved adit portal did not revealappreciable metal concentrations, but high-grade samples of material previously excavatedA80IIIIIIIIIIIIIIIIIII

iiIIIIIIIIIIIiIIIIfrom the shaft (PA634-635) have high lead, silver, and copper concentrations, and gold inamounts that elicit byproduct considerations (appendix C, D).Extent of this structure along strike is not known; assessment therefore, is notpossible. The high metal concentrations are interesting, but key data that would have to bedetermined are: 1) extent of the structure along strike and down dip; 2) the amount of that.structure already removed by mining; 3) the degree to which the high-grade metallizationcontinues along this structure.Specularite prospect PA636-637 (fig. 55)This fault zone with quartz veining in a dioritic phase of the Patagonia batholith wasexplored by two adits. Available data leave uncertainties about the full width of the metallizedpart of this fault, and whether the fault zone wall rock or the quartz veining, or both carry themetallization. Extent of the zone along strike is unknown, precluding assessment.Appreciable metal concentrations (other than iron) were not detected.Bennett Mine vein PA638-640 (fig. 55-56)Original development by a 200-ft-deep shaft on an east-trending fracture zone inintrusive granodiorite and quartz monzonite rocks (Schrader, 1915, p. 313); this metallizationis presumed to be part of the Patagonia batholith, based on reported lithologies. Data fromthe inclined adit (fig. 56, PA638-640), combined with a description of the site during themining era from Schrader (1915, p. 313) lead to the conclusion that a base-metal sulfide zoneof pyrite and chalcopyrite occurs over a zone rather than in a narrowly defined vein.Supergene minerals are evidenced by the presence of malachite (J. R. Thompson, writtencommun., 1993). It is not certain whether the samples collected in adit PA638-640 are oforiginal mining target.Field data collected do not clearly delineate any particular structural width, and thereis no record of the on-strike continuity of this quartz-sulfide filled fracture zone. Assessment,therefore, is not possible with the collected data. Interesting among the assays is that an inplacesample contains 1.47% Cu and over 2.5 oz Ag/st (PA640). However, silver is notelevated in the other samples, running less than 1 oz/st, and there is no appreciable quantityof gold or other base metals. The site is unlikely to be developed for copper alone.Buena Vista Mine-King Mine vein PA642-707= (fig. 47-49)Estimates of the tonnage of inferred subeconomic resources at the site were based ona strike length of 2,690 ft between site PA642 (an outcrop) and PA707 (a shaft on the vein).Width of 2.65 ft was determined from 54 samples (PA642, 644-661,663-670, 674-676,682-706) where measured chip samples were collected. Select samples were not used.Samples of some of the subparallel veins of short or unknown strike length (PA662, 671-673,677-681) were not used. Down dip extension (380 ft) is based on elevations of the ends ofthe vein in relation to the topographic surface, between sites PA642 and PA707. A weightedaverage grade of copper concentration (1.2%) was derived from the same 54 samples usedto determine average width (see above). A copper price of $0.97/Ib Cu was used.There are obviously two veins that were mined in the lower level adit of the BuenaVista Mine (fig. 48), but only one at the upper level (fig. 49). One NE.-trending vein wasworked at the King Mine. For the purposes of modeling the deposit and estimating tonnage,only one vein was assumed, since the majority of the deposit has only one that wasminedfor any considerable strike length. However, data from both veins in the lower level of theBuena Vista were included with data from the upper level vein and the King Mine part of theA81

vein to more accurately approximate overall vein width and overall vein copper concentration,between sites PA642 and PA707. A field observation is considered in which it is noted thatthe northeast-trending vein is not exposed in the vicinity of the King Mine shaft (PA643, fig.47). A NW.-trending vein is exposed at that shaft collar (C. E. Ellis, USBM, written commun.,1994) (apparently sample PA643). This is either a cross structure ora fault-offset segmentof the Buena Vista Mine-King Mine vein. The N. 30 ° E. trend of the vein reappears to the N.at site PA642, although there may be some offset to the W. at that site. The vein is provento be continuous between the Buena Vista Mine portals (fig. 47-49) and a point about 125ft SW. of the King Mine shaft (PA643). It was therefore modeled as one continuous veinthroughout the resource zone.The discussed dimensions allow estimation of an indicated resource tonnage of225,000 st (using 166.5 Ib/ft 3 for the vein density). About 810 ft of the strike length of thisvein has not been examined by USBM [Simons (1974, map) shows total strike length as3,500 ft], and nearly all of that is southwest of sample site PA707 (fig. 47). This unexaminedsegment of the overall structure could contain another 16,000 st of vein quartz, if the averagewidth is the same as the parts examined by USBM. At least some of that amount has alreadybeen removed at workings numbered PA642-PA707 (fig. 47).Copper is the only metal with appreciable concentrations, averaging over 1.2% Cu in54 samples. Gold concentrations are low: samplePA697, in the Buena Vista Mine (fig. 48),contains 0.7 ppm Au, and nearby sample PA699 contains 0.4 ppm Au, but no other samplefrom the veins contains even as much as 0.01 ppm Au (0.0003 oz/st). It is not economicalto attempt to recover gold at these concentrations from such a thin structure. Silver contentwas also high in sample PA697 (10.7 oz Ag/st), but no other sample from the structurecontained even 1 oz/st of silver. No resources of the metal were estimated due to its lowconcentrations, overall.The site will not be mined in the foreseeable future due to the narrowness of the veinand the absence of appreciable metal concentrations other than copper. A vein this narrowcould cost $100 to $150/st to mine, but the contained metal value of copper, at early 1994prices, is only $23/st. Mining losses and actual recoveries in the beneficiation processeswould increase this disparity further.A prospect adit in the south side of Providencia Canyon, NW. 1/4, NE. 1/4., sec. 36,T. 23 S., R. 15 E. (see pl. 1 ) may be driven on a northeast extension of the Buena Vista Mine-King Mine vein, or a structure. The site, noted in Simons (1974, map), was not examined byUSBM.Edna Mine group PA716-718 (fig. 29, pl. 1)Silicified fracture zones in Patagonia batholith do not have metal concentrations ofeconomic interest. Site PA718 has somewhat elevated copper content (0.3% Cu, appendixC), but extent of the fracture there is negligible.Two other prospect pits in this same host rock, a quartz-monzonite phase of thePatagonia batholith, were noted nearby (Simons, 1974, map). One is approximately 375 ftsouth-southeast of site PA717; the other is about 900 ft northeast of site PA718. Both sitesare shown on plate 1. Neither was examined by USBM.The main tungsten-bearing part of the mine group was not examined by USBM fieldcrews, making assessment impossible. Data that are available from literature suggest theoccurrence is a small one, and thus unlikely to see future development for tungsten. The U.S.relies on tungsten imports for essentially all mine product consumed annually. This is a factorof price, mainly. U.S. deposits cannot be mined competitively in 1994.A82IIIIIIIIIIIIIIIIIII

illIIIIIOther unexamined localities (sec. 25, T. 23 S., R 15 E.)Simons (1974, map) shows a west-trending adit, and three prospect pits (two arealong the western margin of fig. 52, this report) in granodiorite of the Patagonia batholith.The USDA, Forest Service "visitor's" map of the Patagonia Mountains (1:126,720-scale)shows a shaft symbol in the NE. 1/4 of this same section. Hosts rocks there would also begranodiorite of the Patagonia batholith. None of the sites (shown on pl. 1) were examined byUSBM. They most likely expose thin, low-tonnage metallized veins and/or faults, similar tothose of the Bennett Mine or Minnesota Mine, but this cannot be verified without fieldexamination.,iii'~]!:!11: ,i,!i!iiiiiii!: • ,A83

Samplenos. PA530-533 PI. 1 onlyHaist MineName from U.S. Geological Survey topographic map.GEOLOGY.In unit mapped as Cretaceous-age Bisbee Group rocks (Simons, 1974, map); at minesite the bedrock is fine-grained, highly siliceous, white igneous rock. A breccia pipe(dimensions unknown) intersects the siliceous igneous unit at the site of a prospect pit(PA530-531). Minor amounts of tourmaline, copper sulfides, hematite, pyrite have beenintroduced there. At the adit (PA532-533), a black, aphanitic, E.-W. trending dike(dimensions unknown) was excavated; it intrudes the siliceous igneous bedrock. This dikecontains economic concentrations of copper and silver, and geochemically anomalous levelsof zinc and lead. It appears to the main metal host at the Haist Mine. The Laramide-agePatagonia batholith is the most likely metallizing agent.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data. Production unlikely.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.No data are available that would allow analysis of mineral resources at this site. Thehigh levels of copper and silver (Ag as much as 46 oz/st) suggest that revisiting this site iswarranted to collect needed geologic data. Molybdenum concentrations are not elevated,suggesting that the breccia pipe is distal from the Patagonia batholith and probably is of smallsize and therefore low tonnage.A84IIIIIIIIIIIIIIIIIII

!1i|:i'ii~:'lIIIIIIII|I,!!'IrSample nos. PA534-535 PI. 1 onlyOlive MineName from U.S. Geological Survey topographic map.GEOLOGY.On the Harshaw Creek Fault at the contact of Precambrian igneous rock unit that alsooccurs immediately S. of the Mowry Mine, and rocks of the Cretaceous-age Bisbee Group(Simons, 1974, map). The same Laramide-age diorite that is the metallizing agent at MowryMine occurs at the Olive Mine (Smith, 1956, pl. 1 ). Thus, the Patagonia batholith is the mostlikely source of metals at this site.The northern shaft (PA534) dump contains skarn material and the diorite. Thesouthern sl~aft dump (PA535) contains pyritic rhyolite that bears slightly elevated coppercontent (0.17% Cu).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data. Production unlikely.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Poor rock exposure, sparse field data preclude analysis. Known metal concentrationsdo not encourage additional exploration.A85

Samplenos. PA536-538 PI. 1 onlyUnnamed prospectMine map in USBM files; not reproduced in this report.GEOLOGY.In siliceous Triassic- to Jurassic-age rhyolite, near contact with quartzite (Simons,1974, map). Rhyolite has been impregnated with pyrite and hematite stockwork veinlets.All have undergone heavy argillic alteration. Minor copper carbonates. That suggestslimestone blocks nearby in the volcanic pile.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data. Production unlikely.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Extent of the argillic alteration and pyritization is unknown, precluding economicanalysis. No appreciable copper content; minor silver enrichment in one sample (see appendixC, D).A86IIIIIIgIIIIIIiIIIII

iIIIIIIIIIIIII1Sample nos. PA539-541Winifred MinePI. 1 onlyGEOLOGY.Simons (1974, map) mapped a NE.-trending vein that extends between the twoWinifred Mine workings sampled by USBM (PA539-540 and PA541 ) and no farther. The hostis blocks of quartzite and shale enveloped by Triassic- to Jurassic-age rhyolite. An intrusivediorite(?) was also noted (Schrader, 1915, p. 321). These reported field relationships fromthe literature suggest the Patagonia batholith as the mineralizing agent at this site and suggestthat the NE.-trending fracture localized metallization. The ore produced came from a flat, bedlikezone of limonitic material with malachite, azurite, cuprite, and banded quartz gangue. Theworking from which ore was mined could not be found by a USBM search of the area; it issomewhere NW. of adit PA539-540 and its dimensions were not recorded in the literature.Working PA539-540 explores a E.-W. trending fracture through rhyolite very near a quartzitecontact; it is not heavily metallized. (See Schrader, 1915, p. 321 .)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Developed by George Gross in 1904 or earlier. He shipped one carload of 80% Cu orein 1904. By 1915, when the site was owned by the Four Metals Mining Co., there were1,000 ft of underground excavations, mostly on the lower level (apparently site PA539-540),and including drifts and stopes. The caved PA539-540 adit was driven for 415-ft to the S.and had 175-ft of composite drifts off of it and a 30-ft-deep winze. Other workings, 200-fthigher than PA539-540 and a short distance to the NW., could not be found during the 1990USBM field examination.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Since no dimensions are known concerning the high-grade zone from which ores wereproduced, no economic analysis can be made. Low historical production, the thinness of thehost vein (PA541), and elevated levels of only Cu and Pb suggest that this property will notbe explored further (see appendix C, D).A87

Sample nos. PA542-563 Fig. 23-26Four Metals Hill (Red Hill) copper porphyry depositOther names: Four Metals Mine; also Presidential Group [after the mining claim group inwhich individual claims were named after several past U.S. presidents (Shepard, no date)[.Also called Red Mountain copper deposit and Red Mountain Mine in the 1940's and 1950's(Farnham, 1953; Shepard, no date; Elsing and Griswold, 1951, p. 1).The Red Mountain term comes from the distinct color imparted by oxidized pyrite tothe siliceous breccia which caps this deposit. The USBM now avoids using the term RedMountain, because there is another, larger "Red Mountain" copper-porphyry deposit farthernorth in the Patagonia Mountains (pl. 1; fig. 14).GEOLOGY.General structure, orientation, and mineralo.qy (fig. 23). The area is mainly composedof a Tertiary-age granodiorite or quartz monzonite of the Patagonia batholith. Four Metals Hill(Red Hill) is composed of quartz monzonite breccia, which is silicified, and contains low-grade,disseminated and stockwork chalcopyrite and considerable disseminated and stockwork pyrite.Drill cuttings of the breccia (circa 1954) were interpreted to demonstrate that the brecciaclasts are granodiorite (or quartz monzonite) of the Patagonia batholith, surrounded by amatrix of quartz and metalliferous sulfides (AGDC, 1954?, doc. 8040). (See also Simons,1974, map; Schrader, 1915, p. 3t 8-219.)The quartz monzonite breccia, which occupies the entire upper mass of Four MetalsHill, is an inclined, non-uniformly oval-shaped structure with the longer axis trending eastwest;its footwall contact with the granodiorite intrusion dips north at 45 ° (fig. 24). Thiscontact may in part be a fault zone at depth (4,830-ft elevation), and is certainly heavilysheared near the face of the 5260 level adit (Farnham, 1953, fig. 9; Schrader, 1915, p. 319).The quartz monzonite breccia ends abruptly near the portal of the 5400 level adit, wherealaskite crops out. The alaskite-breccia contact is at least in part igneous in nature, and it dipssouthward at 80 ° or is vertical and extends to a depth of nearly 1,100 ft below the top ofFour Metals Hill (or to a elevation of 4,705 ft). This alaskite is a significant delimiting factoron the size of the Copper-porphyry deposit.The copper-porphyry deposit. Uppermost Four Metals Hill itself is the deposit's leachedcap (fig. 24); below this, in the upper northern part of the quartz monzonite breccia, is an areaof supergene copper enrichment, as evidenced by chalcocite (AGDC, no date, map, doc.8047). Hypogene (primary) copper, occurring as chalcopyrite in disseminated and stockworkveinlet forms, is within the quartz monzonite breccia (AGDC, 1954?) on the footwall side ofthe breccia, in a 200-ft-thick zone (fig. 24). The cross sectional area of this copperconcentrationzone is considerably less at depth and it may not be present at all at themaximum depth of the quartz monzonite breccia (4,705 ft elevation) (Farnham, 1953, fig. 8-11). Width of this zone is estimated at about 500 ft (USBM file data, Denver, CO). Thehighest copper concentration in this footwall zone in the breccia is immediately along thegranodiorite and quartz monzonite breccia contact (Farnham, 1953, p. 1 ). This material canreach copper concentrations of 1.47% Cu, but rarely exceeds 1.0% Cu (Elsing and Griswold,1951, p. 11). A second, and separate zone of hypogene copper concentration in the quartzmonzonite breccia is on the northern side of the deposit; this near-vertical zone is near thealaskite and quartz monzonite breccia contact (Farnham, 1953, fig. 9) (see fig. 24, this report).A88IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIAlteration. Hydrothermal alteration of the deposit has been recognized for many years(Schrader, 1915, p. 320). However, very little detail has been reported about specifichydrothermal alteration zones that characterize copper porphyry deposits. The quartzmonzonite breccia is bordered by a quartz-pyrite-sericite assemblage (AGDC, 1954?), whichis suggestive of a phyllic alteration zone. Inside this zone, at the granodiorite intrusion-quartzmonzonite breccia contact, are the highest copper grades known in the deposit. It is thereforepossible that the majority of copper mineralization is in the potassic alteration zone andespecially at the potassic-phyllic interface. The presence of available calcium in the systemis proven by gypsum on the walls of the 5400 level adit. The upper north part of Four MetalsHill may therefore be a part of a propylitic alteration zone. No evidence for an argillicalteration zone is known.Trace metals. USBM samples from the deposit usually contain no silver. Molybdenumranges from about 100 ppm to 200 ppm. Gold is usually present, but in low amounts (lessthan 1 ppm).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The presence of silver and gold at the site was discovered in the 1860's or earlier andnamed the "Gaujolote lode", because of the adjoining physiographic feature, Gaujolote Flat.Silver in sulfide form, with trace gold was found in 1-ft to 6-ft-wide zones on the surface; a60-ft-deep shaft (location not known any longer) was sunk on one 3-ft-wide metalliferouszone. At some later date, George Gross owned the property, selling in 1904 to the FourMetals Mining Co., Mowry, AZ. The new ownership conducted the initial mine developmentwork in 1905, with over 2,000 ft of workings (fig. 25-26), and the next year a shipment ofcopper-silver-gold ore was made (quantity unknown). The 5260 level adit was undertakenin 1907, and "several thousand tons" (st) of low-grade ore was placed on the dump outsidethe portal at that time. The period of 1908-1909 apparently was the last period of extensivedevelopment work, when 80 men were employed at the site. Intermittent, small-scale worktook place from 1909 to 1915, by which time the drifts and raises totalled 3,000 ft; thisincluded the 5400 (fig. 26) and 5260 levels, and their interconnecting raise (Schrader, 1915,p. 317-318).King Copper Co. acquired the mine in the early 1920"s, and apparently undertookdriving of the lowest adit on the property (5090 level), which increased the total minedevelopment to over 4,000 ft. Inspiration Consolidated Copper Co. apparently participatedin examination of the property, 1921-1923 (Freshman, 1947, p. 4; Elsing and Griswold,1951, p. iv, 3; Farnham, 1953, p. 8). Diamond drilling of the property was undertaken in1929-1930 by Paul Billingsley, who completed 3 holes to about 1,000 ft in depth (collaredin the gully below and due north of the 5400 level portal, and one from the northernmost faceof the 5090 level (Farnham, 1953, fig. 3).Coronado Mines, Inc., Tulsa, OK, took over the property in 1942. American Smeltingand Refining Co. sampled the existing mine workings in 1950-1951, possibly on a lease oroption. Coronado Mines, Inc., in 1951, applied for a Federal Government Copper ProductionLoan to develop the mine further and produce ore; this led to an examination by USBMengineers (Elsing and Griswold, 1951, p. i, iv, v, 1, 3). No loan was granted. In 1953, themine was not active; the USBM by that time had acquired the drill data and assays of PaulBillingsley work of over two decades earlier, and re-examined the site (Farnham, 1953). In1954, Duval Sulfur and Potash Co. drilled the property, verifying the main structuralinterpretations made in previous explorations, and quantifying the chalcocite blanketA89

(secondary enrichment zone) (AGDC, 19547). No information is known about the mine'shistory for the next 18 years. Exploration by the Noranda Mines, Ltd., Canada, subsidiaryWest Range Co. included extensive diamond drilling and coring; work took place between1963 and at least 1965 (Johnson, 1963, p. 1; Penny, 1965, p. 1). Those drilling data arenot available to the USBM.Another hiatus in data ended with the early 1990's action by Metallic Ventures, Inc.Tucson, AZ, which began seeking permits to open pit mine the deposit (J. R. Thompson,USBM, 1992, written commun.). Data about exploration by that firm is not known by theUSBM.It appears then, that there has been no ore production from this mine other than theunquantified amount in a 1906 shipment.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.This USBM analysis is based on data no more recent than Penny (1965). The onlyunderground working that was significantly accessible to the USBM in its 1991 CoronadoNational Forest study field investigation was the 5400 level (fig. 26). The 5090 level (FIG.25) was completely caved. The 5260 level was badly deteriorated due to collapse of theback, and it was flooded by thick, deep mud, so it could be examined for only the outermost200 ft. Metallic Ventures, Inc., of Tucson, AZ, initiated the permitting process in the early1990's, with the intention of open-pit mining this copper porphyry deposit. Newer explorationdata for the site which Metallic Ventures certainly would have, was not available to the USBMfor this assessment and economic evaluation. Such data could refine the shape of thedeposit, more closely quantify resource zones, and better verify grade. The USBM has notenough data to support estimation of reserves at the deposit. However, the general size,orientation, and grade of the deposit have been known for many years, and it was on thosedata that the USBM completed its analysis. Nevertheless, it should be remembered that theassessment by Metallic Ventures cannot be accepted or rejected, based solely on this USBManalysis.Prefeasibility-level economic analysis of the property found no development scenariothat would make the property economically viable, based on data known by the USBM. Lowgrade, low tonnage, and copper price are the controlling factors. A mine model of open-pitdevelopment of the supergene enrichment zone [5 million st at 0.61% Cu, according to AGDC(1954?)], the inclined hypogene copper zone down to a depth of 900 ft [8.4 million st at0.47% Cu according to Penny (1965, p. 2)], and the small, near-vertical hypogene copperzone on the north side of the deposit (USBM estimate of 60,000 st, grade confidential)resulted in the following estimates of economic viability. USBM's PREVAL modeling and costestimation program was used to calculate these results.A small open pit mine, operating at 4,100 st/day ore and 6,100 st/day waste willrequire $18 million capital investment. A one-product flotation mill, operating at capacitywould require $19.3 million in capital investment. The mine would operate for 12 years, after2 pre-production years. Ore could be mined for $3.90/st and milled for $7.80/st. The NPVis -$76.3 million. Increasing the mining rate would significantly increase the capitalinvestment required, making the mine even less economical.Mining just the supergene enrichment blanket by a small open pit mine, operating at2,000 st ore/day will require $12.1 million capital investment. A one-product flotation mill,operating at capacity, will require $12 million capital investment. The mine would operate for9 years, after 2 pre-production years. Ore could be mined for $4.80/st and milled for$10.30/st. The NPV is -$47 million.A90IIIIIIIIIIIIIIIIIII

II!IIIIII!II!!!!Mining the entire inclined hypogene copper zone (8.6 million st of 0.47% Cu) byunderground methods (stoping) would consist of a mine operating at 3,000 st ore/day,requiring a $9.6 million capital investment. A one-product flotation mill, operating at capacity,will require a $15.8 million capital investment. The mine would operate for 11 years, after3 pre-production years. Ore could be mined for $9.90/st and milled for $8.70/st. The NPVis -$70 million.Dump material.--Reported representative sampling of the rock from the mine's 5260 leveldump revealed a higher copper grade than is found in the inclined hypogene copper resourcezone: 0.68% Cu (Freshman, 1947, p. 4). This higher-grade material probably came from thelow-tonnage zones of very high copper concentration that were first intersected many yearsago on that level. This material could be readily processed in conjunction with new miningon the property, but is far too low in tonnage to be mined by itself. The 5260 level dumpcontains about 5,500 st of rock, much of which is heavily pyritized (C. E. Ellis, USBM, writtencommun, 1994). Freshman (1947, p. 4) also reported a representative sample from the 5090level dump with 0.86% Cu. USBM field observations (1994) are that this dump containsabout 6,400 st of largely barren rock (C. E. Ellis, USBM, written commun., 1994). EitherFreshman's sample was a select of the most metallized rock, or driving of haulages in barrenrock was done after Freshman's visit and the waste rock buried the metallized rock thatFreshman reported. The 5400 level dump was sampled by the USBM in the 1950's; itcontains low copper concentration (0.15% Cu) (Farnham, 1953, p. 9). Size of that dump isunknown.!!iiiIA91

Sample nos.PA603-621PA624-6279PA708-715Fig. 29, 55, 63-64Metallized structures in granitic, Jurassic-age rocks, near Patagonia batholith contactIncludes:National Mine PA603-605 (fig. 55);Isabella Mine PA606-607 (fig. 55, 63);Shamrock Mine veins PA608-621 (fig. 55, 64);Jabalina prospect vein PA624-627 (fig. 55);Unnamed prospect veins PA708-71 5 (fig. 29).GEOLOGY.Jabalina, Shamrock, Isabella, National: quartz veins along the contact of Jurassic-agegranite porphyry and diorite, associated with faulting and brecciation (Schrader, 1915, p. 310-312; Simons, 1974, map). Metallizing source is most probably the Patagonia batholith.Unnamed prospect veins PA708-71 5: thin quartz veins in Jurassic-age granitic rocks,some near the contact with the Precambrian-age, hornblende-rich complex (Simons, 1974,map)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Data very sparse.National Mine shipped "six carloads" of lead-silver ore in 1907, and was developed bya 200-ft-deep shaft with 400 ft of horizontal drifting by that time (Schrader, 1915, p. 310-311).Isabella Mine was located in 1904, and was developed by 1915 with a 50-ft-deepshaft(Schrader, 1915, p. 311). Two adits noted at the site in 1994; the shaft could not befound (C. E. Ellis, USBM, written commun., 1994).Shamrock Mine, also called the Gross Gold Vein prospect when owned by GeorgeGross, was developed by 1915 with a 140-ft-long adit and a 40-ft-deep shaft (Schrader,1915, p. 311).Jabalina prospect was developed by 1915 (Schrader, 1915, p. 312).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Ordered by sample number.National Mine vein PA603-605 {fig. 55)Schrader (1915, p. 310-311) describes a metallized, south-dipping lead-silver veinalong the contact of diorite and quartz monzonite. Those rocks are Jurassic-age (Simons,1974, map), but the metallization is younger, probably originating from the Patagoniabatholith. Another siliceous, lead-silver vein, south dipping, and occupying a breccia zone,was excavated south of the National Mine main shaft (PA604-605), on the opposite side ofthe Canada de la Paloma wash. Those workings include at 90-ft-long adit that lead to a 90-ft-Descriptions of samples PA628-707 are on preceding pages (p. A76-A83).A92IIIIIIIIIIIIIIIIIII

i!1!!!!!!!II!!!!!!!!long inclined winze, and revealed some quartz breccia with 65% lead and 60 oz Ag/st(Schrader, 1915, p. 311)o That adit, called the National No. 4 prospect, could not be foundby USBM field crews (C. E. Ellis, USBM, written commun., 1994). The most importantconsideration is that the deposit exhibits metal zonation: lead-silver veins at the surface arereportedly copper-rich at depth (site PA604-605) (Schrader, 1915, p. 311).Dimensions are not known for either vein of the National property. Only high-graderock from the dumps was collected. An assessment cannot be done for this property withoutdimensional data on the vein and some uniform sampling of it. The fault zone mapped bySimons (1974, map) encompasses both the National and the Isabella mines (fig. 55). Anyfurther exploration of this area should focus on that structure and the ways in which themined veins may be affected by it.Isabella Mine vein PA606-607 (fig. 55, 63)Shown on some modern topographic maps as the Serenata Mine. Adit that wasexamined was near collapse in January 1991. Schrader (1915, p. 311) describes an eastwest,vertical, 2.5-ft-wide quartz vein at the site, traceable for nearly 0.5 mi along strike.Minerals identified by Schrader include drusy, banded quartz with limonite, psilomelane, andlead carbonate(?), and galena at the shaft area (Victor claim, in the west part of the property).USBM field crews did map the vein that Schrader described, or find the shaft thatSchrader described, or find any vein quartz in place. It would be preferable to have resultsof more sampling of the vein and examination of the rest of the mine workings while makingan assessment. Sample PA607, vein quartz, from the dump of an adit (fig. 63) containseconomic concentrations of silver and lead, but it is important to note that the sample is highgrade.Schrader's dimensions of the vein suggest that it probably would be too narrow tomine for just silver and lead.Shamrock Mine veins PA608-621 (fig. 55, 64)Schrader (1915, p. 311~) describes a SE. 60°-dipping quartz vein along the contact ofgranite porphyry and diorite. These rocks are Jurassic-age (Simons, 1974, map). Schrader'snotation of alteration suggests hydrothermal alteration along the structure. The site was ofinterest for its supergene enrichment of gold and silver at the topographic surface (Schrader,1915, p. 311).Simons' mapping (1974, map) shows the vein excavated by shaft PA618 is about 700-ft-long along strike (see fig. 55), and USBM sampling shows it is 4-ft-wide. Metalconcentrations in one sample from this vein (PA618) are too low to be of economic interest(appendix B, C). Two other veins were sampled on the property (PA610, 619); their widthsand extents along strike were not recorded. Assessment is not possible with the omitted fieldobservations. Collected samples show no evidence that surficial enrichment zones with goldwere overlooked by past miners.Jabalina prospect vein PA624-627 (fig. 55)Schrader (1915, p. 312) described a 9-ft-wide, SE.-dipping vein that extends east fromthe prospect for 0.25 + mi, and contains manganese staining and pyromorphite. A 25-ft-deepshaft in this vein observed by Schrader "near the top of the hill" was not noted by USBM fieldcrews. The site is called the Gross Mine on newer maps (Simons, 1974, map).Mapping of this vein is not available. Only select, high-grade samples from the dumpof the caved prospect adit are available. Assessment, therefore, is not possible. Positiveconsiderations for this structure are the very high concentrations of lead, silver, manganese,A93

and copper, and the appreciable amounts of gold detected in high-grade samples, and thereported long strike length and large width of the vein. Negative aspects are that there areno data on continuity of the vein down dip, or consistency in its metals content or width.These data would have to be gathered for a complete assessment.Unnamed prospect veins PA709-715 (fig. 29)USBM samples contain elevated silver and lead concentrations (appendix C, D), but notat levels of economic interest. Extent of these four quartz veins is not known but the veinwidths recorded show that they are only about 1-ft-wide. For the metals encountered, at theconcentrations encountered, these veins will not be developed and do not representexploration targets for base or precious metals.A94IIIIIIIIIIIIIIIIIIi

!11 ~ i ! /~!i:i~ ,~i! ~IIII!iIIDESCRIPTIONS OF SITES PA716-718ARE ON PRECEDING PAGES (A76-A83)~i';i~ ~illii Iii!i,~A95

Sample nos. PA719-752 Fig. 30-33Washington Camp/Duquesne Camp base-metal skarn and replacement depositsNamed after the mining camp that was built to support ore development in the 1880's. Other names:the southern third of the area is known as the Duquesne area, after Duquesne Camp. The DuquesneMining and Reduction Co., Pittsburgh, PA, was the principle operator in this mining area in the 1915 era(Schrader, 1915, p. 321).GEOLOGY.General. Geology, unless noted otherwise, is from Schrader (1915, p. 332-333,336-337, 339). Overall geology is dominated by the intrusion of the Laramide-age Patagoniabatholith (Lehman, 1978, p. 163), a granodiorite, into calcareous sedimentary rocks and lesseramounts of Mesozoic volcanic rocks. The intrusive rock is also of quartz-monzonite or granite(porphyry) composition in places. Lehman (1978, fig. 4) recognizes a Washington Campgranodiorite as distinct from the Patagonia batholith. Its significance is that Pocahontas Mineis the only metallized site in the Washington Campgranodiorite. Base-metal sulfide bearingreplacement zones and skarns formed at or near the intrusive-limestone contacts, along faults,or along intrusive-volcanic contacts. Limestone replacement deposits are the most importantof the economic deposits in the area (Lehman, 1978, p. 131). Purest limestones werepreferentially metallized and siliceous limestones were not metallized. In places, faults mademore favorable loci for metallization. Metallizing dike offshoots from the main granodioriteintrusive have been traced back to the batholith's main part, strongly indicating the batholithas the mineralizing agent.Individual zones of ore on the properties can host 1,000 st to 10,000 st deposits,which can be tabular, lenticular, or pipe-like; the most massive are 20-ft in width, but average5-ft in width. Along strike, the average pod of ore is continuous for 50-ft to 250-ft, thoughsome of the best are continuous for 2,000-ft. They often pinch out along strike into thinseams of pyrite and pyrrhotite. Extent of the ore zones down-dip can be considerable. In theoverall area, ore-grade metallization was found through 1,500-ft of vertical extent, asevidenced by ores by Lime Peak as the upper extent, and ores on the 500 level of theBonanza Mine as the lower extent. (See Lehman, 1978, p. 129-130.)Several major trends of metallization are in the area. Some are major fracture zonesand some are localized skarns. Workings of the Texas Mine, Smuggler Mine, Double StandardMine, and the Arroyo Incline are excavated on the northeast-trending Texas fault, which isover 6,000-ft-long on strike (fig. 30). The Texas fault cuts the Paleozoic sedimentary section.Workings of the Pride-of-the-West, Dave Allen, and Arizona mines, and prospects SE. of theHappy Thought Mine are excavated into the northeast-trending Central fault (fig. 30), whichcuts the Paleozoic sedimentary section (Lehman, 1978, fig. 4). The Duquesne Mine is on aE-SE. trending fault of about 800-ft in length (fig. 30). (See Lehman, 1978, fig. 4.)There are three major north-trending fault zones along which metallization and miningare found in the Washington Camp/Duquesne Camp area. The Pride fault is 5,200-ft long,intersects rocks of the Paleozoic-sedimentary section, and is excavated at the Pride-of-the-West Mine, unnamed workings 1,500-ft to the N., and the North Belmont Mine (fig. 30). Atthe Pride-of-the-West Mine, a Tertiary-age dike parallels the fault zone (see detail on Pride-ofthe-WestMine, below). The coincident intersection of both the Pride fault and the Centralfault at the Pride-of-the-West Mine probably bears direct relation to the fact that the mineproduced more ore than any other in this mining area. Bonanza fault is north-trending forA96IIIIiIIII!I|IIiiiII

iIIII1IItIIIIIIiIabout 2,300-ft of its strike length (fig. 30), where it is excavated at the Bonanza Mine,unnamed workings to the No of that mine, the Illinois Mine, Estelle Mine, and Louise Mine.The fault tend changes to SW. at its southern extent, and is explored there by ManzanitaMine. Lime Peak Fault is host toa north-trending skarnzone where the fault separates thePaleozoic sedimentary section on the E. from Mesozoic volcanic rocks on the W. side. Theskarn has been mined along a distance of 5,000 ft (fig. 30) at sites including the Indiana Mineon the north end, the Maine and Happy Thought mines, and several unnamed workings to theS, (See Lehman, 1978, fig. 4.)Skarns that lack a connection to significantly large fault trends have also been mined.The largest skarn of this type is explored by the workings of the Silver Bell Mine and SouthBelmont Mine (fig. 30). Annie Mine is on a much smaller, linear, N.-trending skarn zone. (SeeLehman, 1978, fig. 4.)Geology of specific mine sites. Pride-of-the-West Mine, the main mine in the area, iscoarse, contact-metamorphic, calcite-garnet-quartz skarn formed along the contact of aquartz-monzonite dike and pure, coarsely crystalline limestone. The quartz-monzonite dike is60-ft to 250-ft-wide, and over 1/4-mi in length, extending from the northwestern part ofWashington Camp, southward to the Pride of the West Mine and continuing for another 500ft south of the Giroux shaft. There, the dike joins the late Laramide-age granodiorite intrusive(Keith, 1975, p. 21) that forms the core of the Patagonia range (Patagonia batholith). Thedike strikes N. 17 ° W. and dips, at most, 50 ° SW. West of the quartz-monzonite dike arebeds of siliceous limestone, which apparently is not an ore host. The calcite-garnet ganguecontains sphalerite, chalcopyrite, pyrite, pyrrhotite, and minor magnetite. Zinc concentrationsreach 18% to 20%.At the Bonanza Mine, another major producer in this area, the same type of skarnfound at Pride-of-the-West Mine is metallized by chalcopyrite and sphalerite; chalcopyrite oreswere the highest grade. The pure, coarsely crystalline limestone is west of an intrudinggranite porphyry. Extent of the contact is not known.Similarities in skarn type and metallization were noted in both the Holland Mine (fig.30) and Pride-of-the-West Mine; both are considered to be on the same quartz monzonitelimestonecontact (Schrader, 1915, p. 339).Geology of most of the other mine sites not specifically detailed here bears spatialassociation with the contact of Laramide intrusive rock (granodiorite or quartz monzonite) andlimestone.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.History, development, ownership, and production is summarized in Schrader (1915,p. 321-325) and Keith (1975, p. 21-23). Some sporadic mining took place as recently as1966. Total production estimates for the area vary: 1 ) 350,000 st of ores at average gradesof 6% Zn, 3% Pb, 3% Cu, 6 oz Ag/st, minor gold (Keith, 1975, p. 76); 2) 463,000+ st,produced between 1872 and 1959 (Lehman, 1978, p. 127). Data on some individual minesfollows. Sampled sites are discussed first, and are ordered by sample numbers. Unsampled,unexamined sites are discussed second, ordered alphabetically.Kansas Mine (samples PA719-723). Location on fig. 30. No mine map.** Skarn in crystalline limestone, 200 ft from limestone-quartz monzonite contact; contains pyrite,galena, chalcopyrite, sphalerite. High-tonnage, low-grade. Developed by 200-ft inclined shaftand "several hundred ft" of drifts (as of 1915) (Schrader, 1915, p. 342-343).A97

Produced 40,000 st of ore from late 1870's to 1959, that averaged 6% Zn, 4% Pb, 3% Cu, 4ozAg/st, minor Au (Keith, 1975, p. 78). Over half of the production was mined between 1945and 1957 (20,120 st of 2.66 oz Ag/st, 3.52% Pb, 2.55% Cu, and 9.28% Zn) (Lehman, 1978,p. 127).New York Mine {PA724 725). Location on fig. 30. A partial mine map of that part of the mine later re namedSimplot Mine is published in Lehman (1978, p. 133); it was NOT reproduced in this USBM report.** Not all of the property examined by USBM.** Skarn with chalcopyrite and sphalerite, extending NE. from the mine site; weaker garnetduvelopment, compared to other mines in the area (Schrader, 1915, p. 342). Hosted inlimestone; dikes of Laramide granodiorite nearby. Mined in 1870's and 1880's, but mostproduction from 1900's: 20,000 st ore averaging 9% Pb, 4% Zn, 2% Cu, 7 oz Ag/st (Keith,1975, p. 79). Production in 1945 was 1,570 st (Lehman, 1978, p. 127~.** Some of western workings apparently re-named Simplot Mine; one of eastern workingsapparently re-named Deerwater shaft (Lehman, 1978, fig. 4}; no details of recr:nt history known.** Partial mine map (Lehman, 1978, p. 133) is apparently of the level workings {200 level)intersected through shaft PA725 (fig. 30). At least 850-ft of drifts were excavated there.Indiana Mine (samples PA726-728). Location on fig. 30. No mine map.** Base-metal sulfides along Lime Peak fault contact of limestone and volcanics, with sphalerite,chalcopyrite, galena, pyrite; oxidized. Mined for 10,000 st, from 1940's to 1966. Oresaveraged 17% Zn, 3% Cu, 2% Pb, 4 oz Ag/st, minor Au (Keith, 1975, p. 78; Lehman, 1978,fig. 4). Mined for 850 st in 1956 and 1957 (Lehman, 1978, p. 127).MaineMine Isamples PA729-735). Location on fig. 30. No mine map.** Skarn in quartz monzonite, at least in part, withsphalerite, chalcopyrite, galena, pyrite. Minedfrom 1880's to 1965 for 4,000 st of average 8% Zn, 4% Cu, 35 Pb, 5 oz Ag/st, minor Au ores(Schrader, 1915, p. 343; Keith, 1975, p. 78). Nearly all the production was mined between1945 and 1957 (3,280 st with 3.57 oz Ag/st, 2.66% Pb, 2.65% Cu, and 12.48% Zn) (Lehman,1978, p. 127).** Same skarn trend as Indiana Mine (Lehman, 1978, fig. 4).Happy Thought Mine (samples PA737-744}. Location on fig. 30. Mine map, fig. 33.* * Northwest-trending skarn in limestone, with sporadic sulfide mineratizatiun along a limestonequartzitecontact; pyrite, chalcopyrite, sphalerite, galena. No resources exist here due to smallsize of the occurrence. No past production estimates were made. Part of the same skarn zoneas Indiana Mine and Maine Mine.Bonanza Mine (samples PA745-746). Location on fig. 30; plan and cross-sections, fig. 31, 32. Undergroundworkings not accessible.* * Located in early 1880's or before.* * As of 1915, mostly carbonates and rich oxide ores produced from upper levels, but developmentshaft was 635-ft deep and connects to about 7,000 ft of underground workings (Schrader,1915, p. 322, 335-337).** Later, sulfide ores were worked. Over the life of the mine, produced an estimated 55,000 st ofore, averaging 7% Zn, 3% Cu, 1% Pb, 4 oz Ag/st, minor gold. Most mining occurred duringearly 1900's-1921, 1941-1944, 1951-1957 (Keith, 1975, p. 76).** Some ore was mined between 1945 and 1957 {9,580 st) (Lehman, 1978, p. 127).** A 1940's-era cross-section map is in USBM files, Denver, CO, but the map is classified asconfidential data.Annie Mine (samples PA747-749). Location on fig. 30. No mine map.** Base-metal sulfides in calcic skarn with strong garnet development; sphalerite, galena,chalcopyrite. Mined oxides in late 1800's; for sulfides in early 1900's. Total production about500 st, which averaged 5% Zn, 0.5% Cu, 3% Pb, 5 oz Ag/st, trace Au (Keith, 1975, p. 76).A98IIIIIIIIIIIIIiIIIII

ill :''¸ ....IiIIIIItIIIIIIIIMined for 240 st of 4.59 oz Ag/st, 2.57% Pb, 0.52% Cu, and 8.36% Zn in 1951 and 1952(Lehman, 1978, p. 127).Holland Mine (sample PA751). Location on fig. 30.** Located about 1880; in 1915 was opened to a depth of 200 ft by 4 shafts, inclined steeply tothe west (Schrader, 1915, p. 338-339l.** Produced an estimated 80,000 st of ore, averaging 18% Zn, 10% Pb, 2% Cu, 12 oz Ag/st,minor Au (Keith, 1975, p. 77). During 1945 to 1957, over 1/3 of that ore was produced(24,180 st) (Lehman, 1978, p. 127).** Mine maps showing 3 levels off the main shaft (levels at lO0-ft, 200-ft, and 300-ft) are inLehman (1978, fig. 28). The maps were not reproduced in this USBM report. The shaft areais reclaimed (J. R. Thompson, USBM, 1993, written commun.). A 240-ft by 60-ft open cut areais 120-ft SE. of the shaft shown on fig. 30 (Lehman, 1978, fig. 28).Duquesne Mine (Sample PA752). Location on fig. 30. No mine map.** Not examined by USBM.* * Skarn with disseminated sphalerite, galena, chalcopyrite, pyrite; 20,000 st mined from 1940'sand 1950's averaged 8% Zn, 3% Pb, 1.5% Cu, 5 oz Ag/st, minor Au (Keith, 1975, p. 77).Arizona Mine (NO SAMPLES). Location on fig. 30. No mine map.** Not examined by USBM.** Name from USBM file data (1940's-era).** On Central fault.* * Part of Callahan Lead-Zinc Co.'s Duquesne Unit in the 1940's (USBM file data).Brooks prospect (NO SAMPLES). Prospect is not shown in this report on any map.Site was not found by USBM.Reported by Schrader (1915, p. 346) as a shear in quartz monzonite, trending N. 55 ° W., andbearing chalcopyrite, pyrite, chalcocite along small seams. Excavations consisted of a shaft andadit. No production is known. The site is reportedly 1 mi W. of Belmont Mine (South BelmontMine), beyond the margin of fig. 30. No metal occurrence or production was reported.California Mine (or California-Grasshopper mine group} (NO SAMPLES). Location on fig. 30. No mine map.** Skarn in limestone with galena, sphalerite, chalcopyrite, partially oxidized. Mined sporadicallyfrom early 1900's to 1951. Produced "a few hundred st" of ores, averaging 10% Pb, 5% Zn,4% Cu, 4 oz Ag/st, minor Au (Keith, 1975, p. 76). Documented production from 1949 to 1950is 100 st of 7.60 oz Ag//st, 4.82% Pb, 0.65% Cu, and 8.30% Zn (Lehman, 1978, p. 127).Dave Allen Mine (NO SAMPLES). Location on fig. 30. No mine map.Not examined by USBM.Skarn in limestone at contact with Laramide granodiorite; disseminated sphalerite, galena,chalcopyrite, partially oxidized. Shallow excavations produced about 100 st of ore, averaging7% Pb, 12% Zn, 0.7% Cu, 9 oz Ag/st (Keith, 1975, p. 76). In 1952, 70 st of that total weremined.Double Standard Mine (or Dudley-Standard Mine) (NO SAMPLES). Location on fig. 30. No mine map.Not examined by USBM.Two parallel zones of skarn (fault-controlled emplacement) in limestone near Laramidegranodiorite intrusion. Sphalerite, chalcopyrite, galena, partly oxidized. Mined intermittentlyfrom early 1900's to 1951. Production (300 st to 400 st total) averaged 6% Zn, 3% Cu, 2%Pb, 3 oz Ag/st, minor gold (Keith, 1975, p. 77). Over half the production (220 st) was between1951 and 1952; grades are 5.08 oz Ag/st, 2.93% Pb, 2.84% Cu, 8.49% Zn (Lehman, 1978,p. 127).Empire Mine (NO SAMPLES). Location on fig. 30. No mine map.** Not examined by USBM.A99

Estelle Mine (NOtOldest patent in the area, patented in 1874; Skarn in limestone near quartz monzon~te contact,contains galena, chalcopyrite, pyrite (Schrader, 1915, p. 341-342).Produced 8,000 st ore, with intermittent mining lrom the 1870's, which averaged 7% Zn, 4%Pb, 1% Cu, 7 oz Agtst, minor Au (Keith, 1975, p. 77). More than 3/4 of the production wasbetween 1945 and 1957 (6,020 st of 7.24% Ag/st, 4.21% Pb, 0.79% Cu, and 6.51% Zn)(Lehman, 1978, p. 127).SAMPLES). Location on fig. 30. No mine map.Not examined by USBM.Name changed to Estella_ Mine by Callahan Lead-Zinc Co. Site part of that company's Duque.sneUnit in the 1940's {USBM file data).Keith (1975, p. 77) combined this site with the Louise Mine in his synopsis of mine history in 1heregion. They are skarn deposits with fault control of metallization that occurs as sphalerite,galena, chalcopyrite, pyrite; 21,000 st mined from 1940 to 1963, averaging 9% Zn, 2% Pb, 2%cu, 40Z Ag/st, minorAu. Mining from 1945 to 1959 accounted for 3,510 st of the producl~ontotal (Lehman, 1978, p. 127).Illinois Mine (NO SAMPLES). Location on fig. 30. No mine map.Not examined by USBM.Base-metal sulfides along fault contact of limestone and volcanics, with spha[erite, chalcopynte,galena, pyrite; oxidized. Mined for 2,000 st, prior to 1900, and in the late 1950's. Oresaveraged 9% Zn, 4% Cu, 2% Pb, 4 oz Ag/st, (Keith, 1975, p. 78). Mining took place dunng1945 to 1957 (Lehman, 1978, p. 127).On same fault as Bonanza, Estelle, Louise, and Manzanita mines (Lehman, 1978, fig. 4).Indianapolis Mine (NO SAMPLES). Location on fig. 30.** Not examined by USBM.** Skarn in limestone along Laramide granodiorite intrusion contact. Galena, chalcopyrite, pyriteores mined for about 100 st, which averaged 11% Pb, 2% Cu, 6 oz Ag/st (Keith, 1975, p. 78).Mining from 1945 to 1957 (Lehman, 1978, p 1271.Louise Mine (NO SAMPLES). Location on fig. 30. No mine map.Not examined by USBM.Part of Callahan Lead-Zinc Co.'s Duquesne Unit in the 1940's (USBM file data).Keith (1975, p. 77) combined this site with the Estelle Mine in his synopsis of mine history in theregion. They are skarn deposits with fault control of metallization occurring as sphalerite, galena,chalcopyrite, pyrite; 21,000 st mined from 1940 to 1963, averaging 9% 7n, 2% Pb, 2% cu, 4ozAg/st, minorAu. Mining from 1945to 1959accounted for 3,510stof the production total(Lehman, 1978, p. 127).Manzanita Mine (NO SAMPLES). Location on fig. 30. NO mine map.Not examined by USBM.Skarn in limestone along Laramide granodiorite intrusion contact. Sphalerite, galena,chalcopyrite, pyrite ores mined for "several hundred" st, which averaged 7% Zn, 4% Pb, 1% Cu,9 oz Ag/st {Keith, 1975, p. 78). Lehman {1978, p. 127) tabulates 500 st of production between1945 and 1957.Mary Jane Mine (NO SAMPLES). Location on fig. 30. No mine map.Not examined by USBM.Base-metal sulfides in limestone; oxidation and supergene enrichment; sphalerite, galena,chalcopyrite, pyrite. Mined for about 800 st, mainly in 1950's. Ores averaged 7% Zn, 4 Pb, 1%Cu, 9 oz Ag/st (Keith, 1975, p. 79).North Belmont Mine (NO SAMPLES). Location on fig. 30. No mine map.** Not examined by USBM.AIO0IIIIIIIIIIIIIIIIIiI

~7 ~ :i!;IIIIIIIIIIIIIIIIMined for 2,500 st of 6 oz Ag/st, 3% Pb, 3% Cu, and 9% Zn from 1945 to 1957 (Lehman,1978, p. 127). Part of Callahan Lead-Zinc Co's Duquesne Unit in the 1940"s (USBM file data).On same north-trending fault as Pride-of-the-West Mine and Holland Mine.O'Conner prospect (NO SAMPLES). Prospect is not shown in this report on any map.** Site was not found by USBM.* * Reported by Schrader (1915, p. 346) as a group of claims owned by a Captain O'Conner, located1/4 mi west of the Belmont Mine (South Belmont Mine}, in heavily-fractured, intrusive, quartzmonzonite and granite porphyry that has been intruded by numerous, voluminous, dominantlyeast-trending, quartz veins and stringers "just west" of the limestone of Washington Camp. Theeast trend of fracturing is that which predates the plutonic activity and metallization in the area(Surles, 1978, p. 3). No metal occurrence or production was reported. The site should be withinthe boundaries of fig. 30.Pocahontas Mine (NO SAMPLES]. Location on fig. 30. No mine map.** Not examined by USBM.* * Located in 1880, and mined for "a very large amount" of argentiferous lead carbonate ore duringthat decade. Mined to a depth of 50 ft. Ore occurred at contact of limestone and graniteporphyry (Schrader, 1915, p. 343). No assays. No information since 1915.Pride-of-the-West Mine (NO SAMPLES], formerly Washington Mine (Schrader, 1915, pl. 323), and erroneouslyidentified on recent topographic maps as the "Pride Mine". Location on fig. 30.** On Forest surface; not examined by USBM.** Located about 1880.** Largest producer in this area.** 90,000 st ore produced by 1909; shipping "carload a day" of ore in 1912.** Property once held 50-st smelter, 100-st electric mill (probably comminution mill], andreverberatory-matte furnace.* * Worked by shafts, and interconnected drifts and inclines; shafts to 400-ft in depth. Maps (plan,cross-section, surficial geology) are in Schrader (1915, p. 322-333), but these were NOTreproduced in the USBM report. A newer cross section map, from July 1943, is in the USBMfiles, IFOC, Denver, CO, but is classified as confidential.** Historical data from Schrader (1915, p. 323-324).** Total production not known.** Mined between 1944 and 1945 for 4,000 st of 5.20 oz Ag/st, 3.21% Pb, 2.51% Cu, and10.99% Zn (Lehman, 1978, p. 127).San Antonio Mine (NO SAMPLES). Location on fig. 30. No mine map.Discovered in 1862 (Lehman, 1978, p. 126).Base-metal sulfides in limestone; oxidation and supergene enrichment; sphalerite, galena,chalcopyrite, pyrite. Mined for a "few hundred st" of ore, mostly since early 1900's, whichaveraged 7% Zn, 2% Cu, 6% Pb, 6 oz Ag/st (Keith, 1975, p. 79}. Documented productionbetween 1947 and 1957 is 320 st of 7.56 oz Ag/st, 5.69% Pb, 2.05% Cu, and 7.85% Zn(Lehman, 1978, p. 127).San Ramon Mine (NO SAMPLES). Precise location not known. No mine map.* * Listed as having produced 50 st of 6.16 oz Ag/st, 3.00%Pb, 0.86% Cu, and 4.20% Zn in 1951.It is definitely within the Washington Camp/Duquesne Camp area, but the precise location of theworkings was not reported (Lehman, 1978, p. 127).Silver Bell Mine (NO SAMPLES). Location on fig. 30. Mine maps of part of the underground workings (circa1940's} in USBM files, IFOC, Denver, CO. Maps classed as confidential.** Not examined by USBM.** Patented prior to 1889.** Name changed to Silver Bill Mine by Callahan Lead-Zinc Co. Part of that company's DuquesneUnit in the 1940's (USBM file data}.AI01

Base-metal sulfides, mostlychalcopyrite, in limestone-hosted garnet skarn (Schrader, 1915, p.341) near contact with Laramide granodiorite. Some mineralization control by faults (Keith,1975, p. 79). Oxidized ores at depths to 40ftwere mined (Schrader, 1915, p. 341). Miningmostly in late 1800's; some in 1900's. Production of about 500 st averaged 5% Zn, 1% Cu,4% Pb, 3 oz Ag/st (Keith, 1975, p. 79). Nearly 40% of the production {170 st) was mined in1953 and 1954; those ores averaged 3.30 oz Ag/st, 4.77% Pb, 1.23% Cu, and 5.20% Zn(Lehman, 1978, p. 127).Smuggler Mine (NO SAMPLES). Location on fig. 30. No mine map.** Not examined by USBM.** Keith(1975, p. 79) combined this mine with the Texas Mine in his historical synopsis. The sitescontain base-metal sulfides in limestone; oxidation and supergene enrichment; sphalerite,chalcopyrite, galena, pyrite. Combined, they were mined for about 1,000st in 1950's, whichaveraged 14% Zn, 3% Cu, 1% Pb, 3 oz Ag/st. Earlier production unquantified.South Belmont Mine (NO SAMPLES). Originally called Belmont Mine. Location on fig. 30. Mine mapsof part ofthe underground workings (circa 1940's)in USBM files, IFOC, Denver, CO. Maps classed as confidential.* * Not examined by USBM.** Discovered, opened prior to 1860. Included 2OO-ft-deep shaft as of 1915.** Base-metal sulfides along contact of limestone and diorite, withsphalerite, chalcopyrite. Gangueis garnet, silicated limestone, quartz, calcite, actinolite (Schrader, 1915, p. 340).* * Mining in the 1930's and 1940's; total production about 2,000 to 3,000 st, averaging 9% Zn,3% Cu, 3% Pb, 6 oz Ag/st, minor Au (Keith, 1975, p. 76).* * Part of Callahan Lead-Zinc Co's Duquesne Unit in the 1940's (USBM file data).Texas Mine (NO SAMPLES). Location on fig. 30. No mine map.Not examined by USBM.Keith (1975, p. 79) combined this mine with the Smuggler Mine in his historical synopsis. Thesites contain base-metal sulfides in limestone; oxidation and supergene enrichment; sphalerite,chalcopyrite, galena, pyrite. Combined, they were mined for about 1,000stin 1950's, whichaveraged 14% Zn, 3% Cu, 1% Pb, 3 oz Ag/st. Earlier production unquantified.Tibbetts Mine (NO SAMPLES). Location on fig. 30. Mine map (plan, cross-sections) in Schrader (1915, p. 345),was NOT reproduced in this USBM report.** Not examined by USBM.** Mined since 1884; opened to a depth of 200ft by 1915. Base-metal sulfides at contact ofgranite porphyry and limestone. At least some fault control of mineralization; galena, pyrite,chalcopyrite. Mined oxides in late 1800's; for sulfides in early 1900's. Minimum production1884 to 1909 was 162 st; some contained 18-20% Zn, 30% Pb, 20 oz Ag/st, minor copper andgold (Schrader, 1915, p. 344-345). No information after 1915.Unsampled, unexamined workings on Forest surface (pl. 1 ).** Nine excavations, most of them shafts, are about 1,500 ft NE. of the Kansas Mine. All areoutside the boundary of fig. 30. Metallization is associated with block faulting and the northtrendingKansas fault (Lehman, 1978, fig. 4).** The area was not examined by USBM.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.No base- or precious-metal skarn resources were estimated as a result of USBM datacollection. Washington Camp/Duquesne Camp is largely blanketed by mineral patents. TheUSBM was unable to obtain permission to examine over half of the area. The few sites thatwere visited were mostly caved shafts; no tracing of skarn zones was achieved.The absence of any large-scale exploitation of base-metal skarns from this area overthe past 40 years is typical of the region.The final large mining efforts were during WWII,and the early 1 950's, when Federal subsidy of copper production was in place. This suggestsA102IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIthat the base-metal skarn deposits are not economical to mine without supply crisis or pricesupport situations, or were mined-out, or both. Lehman (1978, p. 129-130) providesimportant observations relative to the possibilities of finding additional resources of thetraditional mined zones (replacement zones and skarn): mining depths at individual minesseldom exceeded 400-ft, but that was a factor largely of structural offset of metallized zonesand the economics of mining. Further, no metal-zonation evidence was found that suggestedto Lehman the ore zones pinch out at depth. Thus, it is likely that deep exploration (500-ft +)on or near the known deposits would encounter more metallization. It should be noted,however, that continuity does not equate to economic minability for such modest-tonnagedeposits.The future economic interest in Washington Camp probably will be related not to basemetalskarn deposits, but to the possibility of concealed copper-porphyry deposits there ornearby.Future exploration. The possibility of finding concealed copper-porphyry deposits below theWashington Camp/Duquesne Camp skarns was pointed out by Keith (1975, p. 23). It iscommon in the region to find copper-porphyry deposits associated with base-metal skarndeposits. Skarn-hosted ore deposits are significant because they contribute a significanttonnage to mine reserves (Einaudi, 1982, p. 144). One example is the Twin Buttes deposit(sec. 5, T. 18 S., R. 13 E., Pima County, AZ), where five mines in carbonate rocks over theeventually discovered copper porphyry produced 479,000 st of copper ores (4% Cu to 7%Cu) with byproduct silver (1 oz to 9 oz Ag/st). A small part of the tonnage also was lead andzinc ore (Titley, 1982, p. 403). At the San Xavier Mine, part of the Mission complex in thePima mining district, south of Tucson, AZ (centered approximately at sec. 31, T. 16 S., R. 12E., Pima County, AZ), 800,000 st of carbonate ores were mined (Titley, 1982, p. 403). TheMission deposit complex as a whole, which includes the San Xavier Mine, among others, isnearly all deposited in a carbonate-dominant sedimentary-rock sequence (Jansen, 1982, p.467). Esperanza deposit is another example; it was mined for about 2,000 st of carbonateores over 40 years before the chalcocite blanket part of the copper-porphyry deposit wasdiscovered (West and Aiken, 1982, p. 433). Skarn-hosted ore deposits are of additionalsignificance as a favorable geologic indicators. Copper-porphyry deposits associated withcarbonate ores have been shown to contain higher hypogene copper concentrations thancopper-porphyry deposits that lack any associated carbonate rock (Einaudi, 1982, p. 139,144; Barter and Kelly, 1982, p. 407-408).At Washington Camp/Duquesne Camp, USBM samples are concentrated in the northernpart of the area, and many are high-grade, select samples. Largely for those reasons, thesamples reveal no zoning of copper and lead-zinc, and no zoning of precious metals.Exploration designed around the major structures in the area may be beneficial. Lehman(1978, p. 163) describes the overall north-trending and north-plunging anticline emplaced onsedimentary rocks in the area by the intrusion of the pluton. Any primary coppermineralization may in part be controlled by this overall structure. Faults should be consideredalso. The north-trending fault set in the area predated the intrusion, and may have localizedany copper mineralization at depth (fig. 30). The post-intrusive set of faulting is east-trending;these normal and reverse faults may have prepared the ground for secondary enrichment(chalcocite blanket formation) should any copper-porphyry type primary copper metallizationbe present at depth.A103

Sample nos. PA753-758 Fig. 27-28Areas of southern Patagonia batholith with possibilities for copper porphyries with byproductmmolybdenumIncludes:Santo Nino Mine (fig, 28, no samples), not examined by USBM;Benton Mine (PA753-756, fig. 27);Line Boy Mine (PA757-758, fig. 27)GEOLOGY.Granodiorite phases of the Patagonia batholith with abundant molybdenum relative tothe overall Patagonia range. Copper content also is elevated. At the Santo Nino Mine, therehas been brecciation and feldspathic alteration of country rock to an aplite where metals weredeposited (Kupfer, 1965, p. E15). Copper, as chalcopyrite, is much more widely disseminatedin the mine than molybdenum (as molybdenite), though most of both metals is confined to aN.-S. joint set and a NE.-trending fracture set(Kupfer, 1965, p. E15-E16). Several structural,alteration, and metallization characteristics reported at the Line Boy Mine (fig. 27) arefavorable indicators of a copper porphyry environment. These characteristics include: 1)presence of small breccia pipes; 2) presence of kaolinization, silicification, introduction ofsecondary mica, and feldspathic replacement; and 3) disseminated copper values.Unfavorable characteristics include low pyrite amounts (except at the Line Boy Mine), Theoverall alteration area at Line Boy is about 150 ft in diameter (Brooke, 1965, p. 1,2). At theBenton Mine, a favorable lithologic mix, order of intrusion, mineral form, and mineralconcentration were noted. Low-grade copper and gold metallization (as pyrite andchalcopyrite), along with minor molybdenite, occur in a granite porphyry that has intruded theoverall granodiorite of the Patagonia batholith; further, the metallized zone is wide (60-ft)(Schrader and Hill, 1910, p. 161). The pyrite and chalcopyrite were noted as [very sparsely]disseminated in the granitic rock (J. R. Thompson, USBM, written commun., 1993).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Few data are available.Santo Nino Mine (no samples). Was mined in 1918-1931 and 1942-1943 for 20,000st averaging 7% to 8% Cu and about 1% molybdenum as MoS2 (Kupfer, 1965, p. E14);sometime later, dump material was processed for molybdenum (Brooke, 1965, p. 2). Theproduction reported by Keith, 1975, p. 82) probably is that from the dump: 200 st, whichwere concentrated into 16 st of MoS 2 concentrates. Mined out by the 1940's (Kupfer,1965, p. E16).Benton Mine (PA753-756). Was developed by a 165-ft-long adit, trending N. 20 ° W.,by 1915, and other workings; located in 1908. Mining target was granite porphyry withdisseminated chalcopyrite, and minor molybdenite that was as much as 50-ft-wide (Schrader,and Hill, 1910, p. 161; Schrader, 1915, p. 347). This porphyry dike apparently trended aboutN. 20 ° W. Its extent along strike is not known. Production was not recorded.Line Boy Mine (PA757-758). Developed to a depth of 80-ft by 1910, via three shaftsand a 120-ft-long (or 65-ft-long) adit. Sulfides of copper and molybdenum (chalcopyrite,pyrite, molybdenite, born~te) are disseminated in granitic rock [probably the PatagoniaA104IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIbatholith granodiorite], but were worked along a 6-ft-wide fracture zone that included somethin quartz veins and stringers (Schrader and Hill, 1910, p. 160-161; Schrader, 1915, p. 348)The two shafts at the top of the hill, each 50-ft-deep (Schrader, 1915, p. 348), were notexamined; they are in Mexico. Strike length of the mined fracture zone is not known.Production was not recorded.Staked claims in the 1960's were called the Rubarb group. There was activeexploration, including drilling of 36 holes and an IP survey, by Bear Creek, around 1965.Continental Materials Corp. (location unknown) examined the property at that time (Brooke,1965, p. 1-2).Justice(?) mineral patent (no samples; not examined by USBM). Probable name fromBrooke (1965, p. 2); was apparently worked for small amounts of high-grade coppermetallization, and may have contained high-grade molybdenite, which was not recovered(Brooke, 1965, p. 2). An adit is shown on modern topographic maps at this site.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Resource assessment of copper-moly porphyry deposition in the southern part of thePatagonia batholith is inherently incomplete. Few data are available and most of the alterationzones in this area were not sampled or examined in any way by USBM field crews studyingthe Coronado National Forest. The Santo Nino Mine could not be examined as patent ownersdid not grant permission for entry. Extent and size of the structures at Line Boy Mine andBenton Mine are not known. No data are available concerning the adit on the Justice(?)patent, or the shaft shown on the Forest Service 1982 "visitor's map" in NW 1/4. NE. 1/4.,sec. 15, T. 24 S., R. 16 E. (see pl. 1). USBM samples were collected from dumps of mineand prospect workings only, at the Line Boy and Benton properties. Data on the Santo Ninoproperty is strictly from literature. The samples collected have low molybdenum content (nomore than 0.2% Mo; see appendix C).No resources are suggested with available data. The lone molybdenum producer,Santo Nino Mine, is mined out; the productive zones were not disseminated in porphyries(Kupfer, 1965, p. E15-E16). However, resource possibilities for copper porphyries withbyproduct molybdenum must remain open ended until more of the alteration zones and brecciapipes are examined in the field and sampled.Future exploration. Some exploration has been undertaken at specific mine sites, and resultswere not encouraging. Exploration at the Santo Nino and Line Boy sites failed to locate eitherextensions of known ore trends or zones of larger tonnage, disseminated copper ormolybdenum. This work included 500 ft of exploratory drifting in the Santo Nino Mine(Kupfer, 1965, p. E16). At the Line Boy Mine, at least 36 exploratory drill holes werecompleted, magnetometer surveys were conducted, and I P surveys (induced potential) weredone (Brooke, 1965, p. 1, 2).Other exploration, which could consist simply of field examinations and sampling, isstill warranted. The three mines sites are characterized by some brecciation, a NE. trend tomineralization, and some dissemination of metals in a two-phase granitic Laramide intrusive.Mapping by Simons (1974, map) shows several NE-trending linear alteration zones in thegranodioritic phase of the southern part of the Patagonia batholith, along with several brecciapipes and circular alteration zones (fig. 2). Several of the circular alteration zones coincidewith the mine locations (Line Boy and Benton mines; a shaft in NW. 1/4, NE. 1/4, sec. 14, T.23 S., R. 16 E.; an adit on the Justice (?) mineral patent; the shaft on the southern end of theA105

Santo Nino patent group). The dioritic phase of the Patagonia batholith, which is on thewestern slope of the southern Patagonia Mountains also contains breccia pipes, and numerouslinear alteration zones (Simons, 1974, map), though they trend to the northwest in this partof the batholith (fig. 2),During exploration, it should be remembered sampling of surficial outcrops may not beconclusive and may not reveal molybdenum. At the Santo Nino Mine, no molybdenum wasdetected at the surface, or at depths less than 100 ft below the surface, a phenomenon thatcould be related to leaching of the outcrops (Kupfer, 1965, p. E16).A106IIIIIIIIIIIIIIIIIII

IIIIIIIIIII|'Sample nos. PA759-762 PI. 1Unnamed manganese prospectsGEOLOGY.Several shallow pits and a trench expose manganese-oxide veinlets in a rhyodacite ofTertiary or Cretaceous age. Data are very sparse. The most extensive area with veinlets isapparently site PA759, which is 50-ft-long on strike, and 30-ft-wide. See sampledescriptions, appendix B.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.No data.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Although these excavations reveal very small, low-tonnage occurrences of manganeseoxides, it is favorable to note the proximity of other loci of breccia-hosted manganese-oxidemineralization in the Canelo Hills (Blue Bird claims, p. All 1; R. L. McKenney prospect, p.A1 22-123). In themselves, these manganese occurrences represent no target for economicinterest because of very low tonnages available. However, collectively, the severalmanganese occurrences in fairly close proximity in this part of the Canelo Hills suggest thepossibility of a concealed Hardshell manto-like source, and perhaps a Hardshell manto-likedeposit at depth in the Canelo Hills, below the general area of these prospects. While theexposed rocks and geologic materials here are alluvium and volcanics, the other key lithologiesthat allowed the Hardshell manto to form, limestone and intrusive rock, very likely occur inthis area, under the volcanic and alluvial covers. This area could be considered a futureexploration target for manganese minerals, but only in the case of manganese supplyemergency. The Hardshell manto, Hardshell Incline, and Mowry manto areas are all morefavorable sites and would certainly be investigated prior to this roughly defined Canelo Hillsarea.I!~ ~i!i!i, I~I.! 'A107

i:~,? ....IIIIIIIIIIIIIIISample nos. NONE COLLECTED Fig. 3American MineApparently on a mineral patent, according to Forest Serviceadministrative maps. Modern USGS topographic map location,2,000 ft in the N. 32 ° Eo direction from the point where this mineis plotted on fig. 3, is not correct. Site not visited by USBM fieldcrews. Data are from literature.GEOLOGY.Metallization is in a vein along the contact of a Paleozoic-age limestone xenolith andrhyolite. The vein trend is W.-NW., dip to the N., strike length is 1 50-ft at a minimum, veinwidth is average 3-ft and as much as 10-ft underground. The vein has replaced rhyolite andis composed of quartz stained by manganese and iron oxides. The ore zone is a swelling ofthe vein, 75-ft-long, and 14-ft-wide. Smelter receipts from El Paso, TX, indicate about 4 ozAg/st, 1.2% Cu, 4% Fe, "some" Zn in the mined ore. Ore minerals are cerargyrite, argentite,chalcopyrite, pyrite, sphalerite, and galena. Gold is reportedly present also. (See Schrader,1915, p. 277-278.)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The site was discovered in 1880. Location of the shaft workings is approximate (fig.3). There was production prior to 1915 and efforts to reopen the mine were underway during1915. Intermittent mining between 1880 and 1943 accounted for 7,800 st with average 21oz Ag/st, 2% Pb, and minor Cu, Au, oxidized Zn (Schrader, 1915, p. 277; Keith, 1975, p.56).Workings in 1915 consisted of three 90-ft-deep shafts, spaced out along 150-ft ofstrike length of the vein, and exploring it, width-wise, for 50 ft. All the shafts wereconnected by a drift at the 90-ft level. Total drifting off the shafts was 150 ft. At somepoint, a winze opened the vein to the 112-ft depth (Schrader, 1915, p. 277-278). Since thattime, an adit was driven on the patent, southeastward towards the original workings (Simons,1974, map). No data on this adit is known. It is just above Harshaw Creek on the E. side.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Historical ore grade and reported extent of the structure do not suggest this site iseconomical to mine under 1994 market conditions. Field data would have to be gathered inorder to verify this.Mine safety issues. Reported stoping at the 90-ft level (Moores, 1972, p. 74), which is a veryshallow depth, suggests high probability of some surface subsidence problems developing inthe future due to stope caving. Keith's (1975, p. 56) report of a "glory hole" may beevidence that such subsidence has already occurred and broken through to the surface.A109

Samplenos. NONE COLLECTED Fig. 34-Black RoseSite on Federal surface. Not examined during 1990-1991 USBM Coronado fieldstudy. Data from existing literature, as cited, used in this economic analysis.GEOLOGY.A fracture (N. 15 ° W., steep NE. dip) through Triassic- to Jurassic-age rhyolite hostsa lenticular zone of manganese oxide minerals. This zone is 2-ft to 8-ft-wide and extends for20-ftalong strike. Overburden coverage prevents further tracing of the extent of the zone.Bulldozer work that was "recent" in 1957 exposed only irregular manganese-oxide stringers(Farnham and others, 1961, p. 174).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The claim name comes from a notice of relocation dated April 1954. The largest piton the main lenticular manganiferous zone, sloughed and 8-ft across, 10-ft-deep, in 1957, had"a few tens of tons" of hand sorted manganese material beside it with an estimated 15% to20%Mn. No production is known. Most of the excavations are much older than the 1950's.(Farnham and others, 1961, p. 174).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.There is no mapped, extensive fracture system in the area of this claim. The small sizeof the known occurrence does not encourage further exploration. The site is not likely to befurther explored or to be developed in the future, even in emergency conditions, due to theprobable very small total tonnage.Al10IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIISample nos. NONE COLLECTED PI. 1, in SE. Canelo HillsBlue Bird claimsSite is 2 mining claims on Federal surface. Not examined by USBM. Data fromexisting literature, as cited, used in this economic analysis.GEOLOGY.A shear and breccia zone in volcanic (probably acidic) rocks contains irregular, small,lenticular deposits of psilomelane and pyrolusite. The zone (N. 60 ° E, vertical) is metallizedfor 160 ft along strike, and down dip for at least 18 ft. Manganiferous lenses are 6-in.- to 20-in.-wide. In-place grade is 20% to 30% Mn(Farnham, 1957b, p. 1).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The claims were owned by Avelino de la Ossa in 1957. Their location is onlyapproximate, having been listed as in the SE. 1/4 of the section where they are plotted on pl.1 (Farnham, 1957b, p. 1), and also in the center of that same section (Keith, 1975, p. 82).Workings included (as of July 1957) an 18-ft-deep vertical shaft with 25-ft of downhole drilling and an open cut, 50-ft long and 8-ft-deep. One-hundred ft NE. is a 10-ft-longadit. Claims were idle in 1957. Production was 42 long tons of hand-sorted, 42% Mnconcentrate over 1952 and 1953, which was shipped to the GSA (Federal Government)purchasing depot in Deming, NM (Farnham, 1957b, p. 1). Production attributed to this siteby Keith (1975, p. 82), dating from the WWl era, is apparently erroneous, and resulted fromconfusion of the Blue Bird claims with the Carico claims, which are about 4 mi. SW. ofPatagonia, AZ. and are outside of the Coronado National Forest.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Famham (1957b, p. 1) stated that "The deposit seems to be too small to be of muchimportance," after estimating resources of "a few tons of indicated ore and several hundredtons of inferred material."The small size of the known occurrence does not encourage further exploration, unlessin emergency conditions. The likely proximity of the R. L. McKenney prospect is positiveinformation, because it suggests that several loci of manganiferous metallization may exist ina few mi 2 area. Development of larger manganiferous deposits in the Patagonia Mountains,such as Hardshell manto, would certainly be favored over these narrow structures. Drillingshould locate a buried paleo topographic surface below the volcanic rocks, as at the Hardshellmanto deposit. At such a geologic interface, precipitation of manganese minerals might befavored, but, as in the case of the Hardshell manto deposit, some highly specific geologicconditions must be present for favorable manganese grades to be deposited.The fact remains that such a manto deposit could exist here and be as yetundiscovered simply due to a lack of exploration drilling. There is no indication, based on thenature of the other manganese deposits on the Patagonia Mountains area, that such a depositwould be economic to mine. It would be logical, however, to reconsider this area forexploration in the event of some future manganese supply disruption.jA111

Sample nos. NONE COLLECTED Fig. 3Blue Eagle MineWorkings labelled "Blue Eagle Mine" on modern USGS topographic maps (seefig. 3) may or may not be the true locality of the mine. Many of theunsampledworkings to the NW. could also be the mine site (fig. 3); they were notexamined by USBM field crews. Schrader's (1915, p. 257-258) location of themine is clearly in Alum Gulch, and suggests workings at site PA132 or possiblyPA127 may be the true mine site. Too little is known about the workings inAlum Gulch and Flux Canyon that are N. of the Flux Mine and the HampsonMine to untangle the history of these sites.GEOLOGY.A vertical, 2.5-ft-wide quartz vein hosts the metals. The vein is within rhyoliteporphyry and contains the sulfide minerals bornite, pyrite, chalcopyrite, in quartz gangue.Argentite also is identified (Schrader, 1915, p. 258). Trend and extent of the vein are notknown.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Little is known. Discovered in 1897, and worked in 1901 to about 1902, thesitewasmined for 60 st of hand-sorted copper-silver-gold ore, which was shipped to the smelter inDouglas, AZ. By 1915, workings consisted of a 240-ft adit on the ore vein with 90 ft ofcrosscuts, raises, and winzes. Keith (1975, p. 56) cites total mine production as 130 st ofaverage 10% Cu, 11 oz Ag/st, and minor Pb, Zn, Au, which was produced between the early1900's and 1956.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.No data gathered by USBM field crews. There is too much uncertainty about the truemine location to infer relationships from Simons' (1974, map) geologic map of the area.A112IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIISamplenos. NONE COLLECTED Fig. 34-36Hardshell Incline MineSite is on mineral patent group controlled by ASARCO, Inc. No field datacollected during 1990-1991 USBM Coronado field study. Data from existingliterature, as cited, used in this economic analysis.GEOLOGY.Metallization at the Hardshell Incline Mine is in the form of oxidized lead-silver andmanganese minerals that have replaced tuffs along an en echelon shear zone. Within theshear zone, the ore bodies are best visualized as a series of stratiform, north dipping (25 ° to40 °) zones 10-ft to 60-ft-thick, with limited lateral extents, aligned on a NE. plunge (about N.60 ° E.). On a larger scale, though, the overall fracture control trends NW. A NEo-dippingshear zone that parallels the ore-hosting shear zone of the Hardshell Incline Mine limits themetallization lateral extent to the NE. Ore-grade metallization has been found down plungefor over 600 ft (250-ft vertical distance) over a 250-ft-long lateral extent (fig. 35-36). Bedsof Paleozoic-age quartzite and silicified limestone noted may be xenoliths in a volcanic series.(See Jones and Ransome, 1920, p. 176; Farnham and others, 1961, p. 170-171; Simons,1974, map; Koutz, 1984, p. 205.)Several ore minerals are identified. The manganiferous minerals are pyrolusite,psilomelane, and braunite in hard, siliceous, irregular, lenticular zones on the rhyolite footwallof the ore zone. Lead and zinc content is elevated. Hangingwall ores are limited in theirvertical extent by a white, impervious fault gouge. The hangingwall ores are lead-silver richand manganese-zinc poor, consisting of cerussite, and minor anglesite, galena, andpyromorphite-mimetite. Sulfide content increases with depth, as does zinc content. (SeeFarnham and others, 1961, p. 170-171; Moores, 1972, p. 80, 82; Koutz, 1984, p. 205.)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Ore-zone float in the wash below the present site of the Hardshell Incline Mine led tothe discovery and claim staking in 1879 by David Hardshell and Jose Andrade. More in-depthprospecting followed in 1880 to 1889 by R. R. Richardson, one of the early developers of theThree R Mine, who purchased the claims. A 230-ft shaft sunk in 1895 near the present siteof the Hardshell Incline adit portal finally led to intersection of the main Hardshell Inclineorebody. The Incline was sunk to 400 ft (all distances are given as along the dip slope) in1896 by lessee Empire Mining and Milling Co (later Columbia Co.), and 4,000 st of ore wasproduced in 1896 and 1897.R. R. Richardson operated the site from 1899 to 1901, producing 15,000 st of ore.He built a 50-ton concentrator on the site to beneficiate these ores. Another lessee, Mr.Henley of Tucson, AZ, leased the site in 1905, and began development in 1906 and 1907which opened the Incline to the 500-ft level, and included some cross cutting, and sinking themain winze on the 325-ft level. Production was not tabulated, but was apparently limited tomaterial removed from the winze on the 325-ft level. The mine was operated on a small scaleuntil at least 1915. The production during this early history of the mine was mainly for silver,but some lead ores were produced. (See Schrader, 1915, p. 265-266.) All the lead-silverores were manganiferous. About 5 million Ib lead and 250,000 oz Ag were recovered(Farnham and others, 1961, p. 170) from the ore.Al13

A hiatus in mining ensued until the time of WWI, when the site was reopened toevaluate its manganese potential. The manganese ore production traditionally attributed tothe Hardshell Incline Mine during this time (500 st of ore and 500 st of concentrates, bothwith over 40% Mn) (Farnham and others, 1961, p. 170; Jones and Ransome, 1920, p. 176-177; Wilson and Butler, 1930, p. 93-94) actually came from the early Salvador Mine workings(fig. 34).In 1920, the Welch shaft, N. of the Hardshell Incline Mine adit (fig. 34), was sunk to420-ft depth in search of a NE. extension of the Hardshell lncline deposit. Some sparse signsof the same minerals and metallization were encountered, but heavy flooding problems in theshaft stopped the work at 420 ft. The shaft did, however, provide a much-needed supply ofwater to the Trench Mill from 1939 to 1964. Minor production of lead-silver ore resumedfrom 1943 to 1948, when 2,500 st were produced. American Smelting and Refining Co. tooka lease in 1944 and began diamond drilling in search of sulfide ores; this work continued untilthe early 1950's. The search was not successful for sulfides, but led to discovery of theHardshell Mn-Ag manto deposit, below the Hardshell Incline Mine. The final mining episodewas by lessee McFarland, in 1963 to 1964, when 2,900 st of Pb-Ag ore were produced(average 6% Pb, 8 oz Ag/st), mainly below the 500-ft level (Farnham and others, 1961, p.170; Koutz, 1984, p. 205, 212). There are over 3,000 ft of underground workings.Average grades of the life-of-mine production is estimated by Keith (1975, p. 58) as6% Pb, 8 oz Ag/st, 0.5% Cu, and minor Zn and Au.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.The important data for addressing mineral resources at the Hardshell Incline Mine arethe tenor of metallization and continuity at the deepest part of the inclined shaft, where thelast stages of mining probably took place in the 1960's. USBM field crews that entered themine in 1989 did not gather data on the extent of the metallization; they were unable topenetrate the main inclined shaft to even the 325-ftlevel, duetolow oxygen content. It isdoubtful that any data could be gathered from the depths of the inclined shaft due to flooding.Natural water level in the mine had flooded the 500-ft level in 1915 (Schrader, 1915, p. 267),but the mine has been opened to even deeper levels (fig. 36).The most probable resource scenario for this site is that the lead-silver metallization,if it continues at depth, is not economic to mine under 1994 market conditions. Themanganese tenor is not known for certain. By itself, the site would probably not be minedfor manganese. Development of the underlying Hardshell manto for manganese by open-pitmethods would allow for recovery of manganese at the Hardshell Incline Mine during strippingof overburden.Al14IIIIIiIIIIIIIIIIIII

IIIIIIIIIIIIIIIISample nos. NONE COLLECTED Fig. 34Hardshell manganese-silver mantoSite is on mineral patent group controlled by ASARCO, Inc.; mostly notexamined by USBM during 1990-1991 Coronado National Forest field study.Data from existing literature, as cited, used in this economic analysis.GEOLOGY.The Hardshell manto, or stratiform-like deposit, is a shallow, oxidized, low-grademanganese deposit with appreciable silver content (fig. 34). Emplaced during the Tertiaryage, the manto is hosted primarily in Mesozoic-age rhyolite tuffs along the north-dipping (20 °)contact between those tuffs and Permian-age limestone below. Fault conduits from anintrusive below the deposit permitted metals to migrate. They are particularly concentratedunder a massive siliceous rock that essentially forms a cap to the deposit. Land immediatelyS. and SE. of the Hardshell Incline adit contains the thickest accumulations of manganiferousrock. Some lower-grade manganese and silver metallization also occurs in the clay zoneabove the manto deposit and in the carbonate rock below.The metals probably originated in the Laramide Patagonia batholith. Data used tocontour the perimeter of the manto are limited (see fig. 34 footnotes). However, the area inwhich resources have been delineated is a 2,000-ft by up to 1,000-ft area that is apparentlyimmediately S. and SE. of the Hardshell Incline Mine adit. The exact perimeters of thisresource zone are not known by USBM. The metallization dissipates to the N., S., and W.peripheries of the manto; the deposit is truncated by the American fault along its SE. margin.Hardshell manto is 100-ft to 400-ft-thick, and averages about 200-ft-thick. Depths rangefrom a few tens of ft deep around the Salvador Mine to a maximum of 450-ft-deep under theHardshell Incline adit portal. There are related deposits of manganese, silver, and base metalsin the immediate vicinity (fig. 34). The Hardshell Incline Mine is essentially a miniature versionof the Hardshell manto, but it is about 200-ft above; further, the Hardshell Incline depositdemonstrates strong control by a NW.-trending shear. (See Koutz, 1984, p. 199,204, 206-208; Jones and Ransome, 1920, p. 120.) That shear control probably limited the overall sizeof the Hardshell Incline deposit, as solutions were not able to migrate laterally to the extentpossible in the lower. Hardshell manto. Salvador and Hermosa mines are on are truer vein-typedeposits of the same metallization, though they contain more sulfides. They occur along E.-W. fracturing and are above the manto (Koutz, 1984, p. 212).The Hardshell manto deposit was initially deposited as metal sulfides, as evidenced bystaining of the siliceous caprock by products of decomposing sulfides and signs of relictsulfide minerals in the manganiferous manto. Hardshell manto was oxidized in place, withonly minimal supergene enrichment of silver and manganese at the top. Metals are zoned inthe mantoo Manganese and lead dominate the upper part and Mn-Zn dominate the lowersections. Copper is elevated in the root zones at the contact with limestones. Dozens ofminerals have been identified in the manto and related fault-hosted deposits (see above).Primary minerals in the Hardshell manto deposit are manganese-and-silver oxides 1° andmanganese oxide (pyrolusite) (Koutz, 1984, p. 199,202, 204).lo These minerals aremainly of the cryptomelane-coronadite, romanechite, and todorokite groups, chalcophanite, and nsutite.Al15

Grades and tonnage published in Koutz (1984, p. 199) are 6 million st of 15% MnO~,5 oz Ag/st, several total percent Pb and Zn, and minor Au (less than 0.O1 oz Au/st). Theseare in the category of measured, subeconomic resources. That tonnage is confined to the2,000-ft by 1,000-ft area, below and immediately S. and SE. of the Hardshell Incline Mineadit, which is only part of the manto delineated on fig. 34. Total tonnage of the overallmanto, therefore, could be three times the published 6 million st resource figure. Grades ofthe additional tonnage are not knowh, but are certainly low (less than 15% MnQ2).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The deposit has not been mined. The true nature of the manto was discovered in the1940's and 1950's during exploration drilling around the Hardshell Incline Mine in search ofsulfide ores. The mantowas delineated by further drilling in 1967 and 1968 (Koutz, 1984,p. 205).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Manganese grades of the Hardshell manto do not approach the concentrations requiredto be considered manganese ores [35% to 54% Mn (Jones, 1992, p. 108)], but have beenshown to be recoverable in USBM laboratory testing. The status of the U.S. as 100%dependent on foreign sources for manganese supply allows for strategic itnportance of thisdeposit. However, it is unlikely to be developed in the foreseeable future, unless some typeof emergency situation develops. In fact, theU.S. Government (National Materials AdvisoryBoard) has recommended that no land-based domestic resources of manganese be developedunder circumstances other than dire emergency (U.S. Bureau of Mines, 1977).The USBM model constructed to simulate hypothetical mining of the Hardshell mantois based on open-pit mining followed by beneficiation and recovery of manganese through thedithionate process of sulfur-dioxide (90~) leaching. Subsequent recovery of silver throughcyanidation is also considered. Preference for the dithionate process of manganese recoveryis based on its long-term establishmentl~; selectivity of SO2 leaching for manganese overiron and other impurities (Wyman and Ravitz, 1947); proven high manganese recovery ofabout 96% (Farnham and others, 1961, p. 165); and formation of a product that is pureenough to be used in the steel-making process.Thedithionate process. Thedithionate process of SO21eaching, as described in Rampacekand others (1959) is a multi-step operation. Qre is crushed and blended, then ground tominus 65-mesh size so that it can be suspended in a solution of calcium dithionate (CAS206).The suspension is subjected to about 3% SO2 gas. Manganese oxide is leached (dissolved)in the presence of SO 2 gas as manganous dithionate and sulfate. Agitation of the suspensiongives better results. After leaching is complete, the leach solution is oxidized through aerationto convert both excess SO2 and ferrous iron to more suitable compounds. Approximately 2.5Ib to 3.5 Ib of SO2 and 1.1 Ib to 1.5 Ib CaO are consumed in the process for each Ib ofmanganese that is leached (Romslo and Ravitz, 1947, p. 11).A purification step involves addition of lime slurry to raise the pH to 5.5 and forceprecipitation of dissolved impurities such as alumina, silica, iron, phosphorous, zinc, and~ USBM experimentation with various uses of S% as alixiviant has been on-going for over 60 years. (See Dean and others,1934.) During WWlI, when supply of overseas sources of manganese was in jeopardy, the USBM built a pilot-scale dithionateleachplant for the recovery of manganese from domestic ores. (See Rampacek and others, 1959.)Al16IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIothers. It is possible that silver is removed here also, but the path silver takes has not beenreported. In a second purification step, the remaining pregnant leach solution is flocculatedwith a substance such as guar gum, and then filtered.Precipitation of a manganese-hydroxide slurry from the pregnant leach solution is thenext step. It is initiated by the addition of dry, pulverized quick lime to the solution. Drumfiltering produces a 53% solids filter cake. The final step is sintering this filter cake with cokeand water to pelletize the fine manganese precipitate. The pelletized product is dried to12.5% moisture content and is ready to ship for direct use in steel mills.Economics. Only the rudiments of the economics are presented here because the mining andrecovery of manganese, or manganese and silver, from this deposit are so far from beingeconomical. Low manganese content in the manto and low price of manganese available fromforeign sources are the major contributing factors to the negative economic situation.Contained manganese value of the manto resource is $10.32/st 12, based on early 1994 priceof ore available on the international market (Jones, 1994, p. 108), down 41% from theprevious year. Expected losses of about 4% in the dithionate process (Farnham and others,1961, p. 165) reduce this value to about $9.90/st. Costs open-pit mining, beneficiating thatmine product through the dithionate process, and sintering the filtered leachate precipitate areover 21 times that amount 13. These are operating costs only; capital costs of the mineinfrastructure would be $22.4 million, according to PREVAL modeling. Under these prohibitiveeconomic circumstances it is presumed illogical to expend capital in building an on-site milland sintering plant, so hypothetical costs of those investments were not estimated here. Itis assumed any production from this deposit would be shipped as raw mine product to an offsitelocation for the crushing, blending, and grinding needed to make a dithionate mill feed;for the dithionate process of S% leaching; and for the follow-up sintering.Silver recovery. No direct testing of silver recovery from Hardshell manto rock is known byUSBM, but manganiferous samples from the Salvador Mine were subjected to cyanidationsilver recovery laboratory tests by USBM over 50 years ago (Romslo and Ravitz, 1947, p. 12).It is assumed for the purposes of this discussion that the results of tests on Salvador Minerock are comparable to Hardshell manto rock due to like genesis and very close temporal andspatial relationships between the two deposits.About 85% to 86% of the silver in Salvador Mine ore can be recovered throughcyanidation; the cyanidation feed, however, was a product of flotation milling, not a productof the dithionate process of SO 2 leaching. It has been reported that the dithionate processpicks up little of the silver (Romslo and Ravitz, 1947, p. 11), but precisely where the silverresides after implementation of the dithionate process has not been reported. Silver mayreside in the product formed in the lime-slurry step of the dithionate process, which isdesigned to remove zinc, iron, and others impurities from the pregnant, manganiferous leachsolution. (See process described in Rampacek and others, 1959.) No testing is known that12 Even this value is probably inflated, because it is based on the price of 46% to 48% Mn in metallurgical-grade ores, whichare more valuable than the low-grade rock in the Hardshell manta.13 Costs are only approximate, being derived by the following methods. Costs of the C'lhionate process as described inRampacek and others (1959) were once estimated by USBM, using CES (Cost Estimation System); estimates are reported inJanuary 1979 dollars {USBM files). By the method of indexing alone, those old cost estimates were updated to January 1994dollars, which accounts for inflation and approximates other economic changes, but incorporates some inaccuracies as well.Al17

has attempted to recover silver through cyanidation from such a slurry product and the 85%to 86% cyanidation silver recovery reported by Romslo and Ravitz (1947, p. 12) may not bepossible from such a chemical compound. If such high recovery of silver were shown to bepossible, it would supply revenue of only an additional $24/st, based on the grade of silverin the Hardshell manto and a silver price of $5.00/oz. That is a small amount of revenuecompared to the projected mine and mill operational losses reported above. Silver may alsoreside in the leach residue of the dithionate process, from which it probably could berecovered at a high percentage rate under the proper pH conditions.All8IIIIIIIIIIIIIIIIIIi

IIIIIIIIIIISample nos. NONE COLLECTED PI. 1Harshaw district gold placersOutside of the National Forest; not examined by USBM field crews during1990-1991 Coronado National Forest study. Data are from literature, as cited.GEOLOGY.The roughly 1-mi 2 area delineated on pl. 1 is approximately the area described bySchrader (1915, p. 279) as hosting recoverable, auriferous, placer gravels on a mesa-likepediment surface. Gravels also contain lead. No estimate of the thickness or amount ofgravels on this pediment surface, or grade, is known. The site was not examined by USBMas it is about one-half mi outside the National Forest boundary. Likely sources of the gold arethe metallized structures at the Trench Camp area and the Flux Mine (fig. 3).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.These placers apparently were workable only during times when water was available.One of the area's pioneer miners, A. J. Stockton, and others, operated jigging equipment inthe area. Stockton's hardrock mining in the region was documented in 1880and 1881,soit was probably about that time when placering was done.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Data concerning the tonnage and grade of the gravels are lacking, which prevents anassessment. Proximity to water in Alum Gulch and Sonoita Creek makes these placers themost likely to be worked of all the placer sites in the Patagonia Mountains-Canelo Hills Unit,but qualification of placer size and grade would have to be established prior to a resourceestimation, which should be done prior to planning any new mining operations.q,,JAl19

Sample nos. NONE COLLECTED Fig. 34Hermosa MineSite is on mineral patent group controlled by ASARCO, Inc, Not examinedduring 1990-1991 USBM Coronado field study. Data from existing literature,as cited, used in this economic analysis.GEOLOGY.The Hermosa Mine lode is a fault breccia, in part vein-like, 1-ft- to 20-ft wide, hostedin rhyolite that is of Triassic- or Jurassic-age; the lode dips N. 33 ° and apparently strikes E.-W.A second, subparallel vein (called the North vein) of steeper dip occurs 50-ft N. of the mainlode on the surface. North vein is not as heavilymetallized. The two lodes intersect at someunspecified depth below the Tunnel Level. The lode is continuous to at least 500 ft down dip.Cerargyrite is the ore mineral, and occurs in a gangue of quartz with hematite, psilomelane,and limonitic material. This is a low-grade deposit, averaging 5 oz Ag/st overall. Sulfideminerals were not found, but relict pyrite molds were noted. (See Schrader, 1915, p. 273-274; Simons, 1974, map; Koutz, 1984, p. 212.)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The mining camp of Harshaw, AZ, was created due to the mining of this vein deposit,which was located in 1877. The mine was sold about 1878 or 1879 to Hermosa Mining Co.,of New York, a firm that later became Prietus Mines Co. of Sonora, Mexico. That companymined silver chloride minerals from Oct. 1880 to Nov. 1881, beneficiating the ores at a 20-tonstamp mill in Harshaw, amalgamating the crushed rock directly on the ground to produce ashipping-grade bullion. Population of Harshaw reached 2,000 during this time, but theeconomic bust soon arrived when the mine shut down in 1882 due to exhaustion of highgradematerial; Harshaw had only 70 people at the end of 1882. One-million dollars worthof silver had been produced from ore averaging $95/st in silver. {See Schrader, 1915, p. 272;Moores, 1972, p. 77.) Extrapolation allows that about 10,500 st of ore were mined duringthat time.The idle mine was put back in operation in 1890 by James Finley of Tucson, AZ, whopurchased the property. Finley opened surface excavations above existing stopes. Briefperiods of mining followed through 1903. Small mills at Harshaw and at the mine site wereused. These were probably stamp mills. In 1902or 1903, Hermosa Mining Co. of Guthrie,OK drove a 900-ft-long adit to undercut existing stope areas, and went broke before reachingthe ore zones. Silver's decline in 1903andthe death of Finley led to the mine's shutdown.Some mining took place in 1908, and again in 1949-1950. Total life-of-mine production isestimated at 70,000 st of average 20 oz Ag/st, making this the largest silver mine in theHardshell area. Most of production tonnage was used as smelter flux. (See Schrader, 1915,p. 272-273; Moores, 1972, p. 77; Keith, 1975, p. 58.)Mine workings are very extensive, totalling 7,000 ft by 1915. They are on fivedifferent levels, named (top to bottom) First, Second, Third, Tunnel, and Fourth levels.Assuming the Fourth level is at a depth of 500 ft, the Tunnel level is at 330 ft; the Third levelat 280 ft; the Second level at 230 ft; the First level at 180 ft. On the Tunnel level, a 600-ftlongN.-S. crosscut has been excavated completely through the E.-W. trending topographicridge on which the mine is situated. (SeeSchrader, 1915, p. 273.) A composite sketch ofsurface and underground workings published by Koutz (1984, p. 206) shows undergroundHermosa Mine workings over a 1,725-ft by 775-ft area, with the long axis oriented E.-W.A120IIIIIIIIIIIIIIIIIII

I',iIIIIIIIIIISome levels extend slightly W. of the North Hermosa workings (fig. 34). It is not possible todistinguish individual levels in Koutz's sketch, so no attempt was made to include HermosaMine maps in this report. Moores(1972, p. 77) reported active caving in the mine workings.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.No data are available to support continuity of the quartz-silver lode at depth or alongstrike. Schrader (1915, p. 274) reports an underlying limestone would be intersected in lessthan 500 ft below existing workings. The fact that material was used a smelter flux indicatesit is highly siliceous and probab!y has little in metal content besides silver. The irregular widthof the vein is a negative factor.The most probable resource scenario, based on sparse data, is that remaining resourcesin this thin, sporadic silver-bearing structure, if any, would not be economic to mine under1994 market conditions. There is no evidence in available literature that this site was everconsidered as a potential manganese source. That content is unknown and assumed to beinsignificant.Possible mine hazards. Moores (1972, p. 77) noted that existing workings were not availablefor safe examination, were actively caving, and that minor surface subsidence resulting fromthe caving was evident on the property. Stoping was used to mine this deposit, and theuppermost level is only 180-ft deep, at the maximum. This is a shallow depth. Future surfacesubsidence and possibly opening of caving stopes to the surface might be expected along themain E-W. trend of the mine.!~iii ......~!iiiiiili~ ....... ,•ii~i ~ ~ ~!ii ....A121

Sample nos. NONE COLLECTED See Blue Bird claims on pl. 1 for general areaR. L. McKenney prospectNot examined.analysis.Data from existing literature, as cited, used in this economicGEOLOGY.Two breccia zones through rhyolite contain manganese oxides, principally psilomelane.The eastern breccia of the two (N. 50 ° E., NW. 85 ° ) is metallized for 210 ft along strike, is1.5-ft-to2-ft-wide, and was mined to 25-ftdepth. Past production came from this breccia.The western of the two breccias (N.-S. strike, dips E. 75 ° ) is continuous at least 180-ft alongstrike, where it is then covered by overburden. Width is 4-ft and it has been excavated toonly 4-ft-depth. Metallization is weal

!!would be economic to mine. It would be logical, however, to reconsider this area forexploration in the event of some future manganese supply disruption.ili;I: :4A123

Sample nos. NONE COLLECTED Fig. 38-39Mowry Mine (originally Patagonia Mine);North Mowry (O1£t Mowry) Mine, later known as Bullwacker deposits;Beyerle pit (manganese)Sites are on mineral patent group; USBM unable to obtain permission toexamine the site, so all data are from existing literature, as cited.Alternate names: NorthMowry(OId Mowry) Mine is on the Golden Gate mineral patent. Thissite was later worked for manganese under the name Bullwacker deposits (Farnham andothers, 1961, p. 162; Keith, 1975, p. 80).GEOLOGY.Replacement of limestones by lead-silver-manganese sulfides allowed formation of theMowry Mine deposits. The NE.-trending Mowry fault (fig. 38), which is at least 5,500-ft-long,acted as a conduit for metallizing solutions. The fault is truncated on its SW. end by theHarshaw fault, and is lost in alluvial materials to the NE. (Simons, 1974, map). All ore bodiesreportedly have been found within 100 ft to the N. of the NW. 80°-dipping fault plane (Smith,1956, p. 34). Precambrian quartz-monzonite rocks occupy the Mowry fault footwall, andPaleozoic limestones occupy the hangingwall (Schrader, 1915, p. 300-301). The probablemineralizing agent is a gabbro, locally dike-like, which is apparently of Laramide age (Simons,1974, map),and most likely is part of the Patagonia batholith. Thegabbro crops out SW. ofthe mine (Smith, 1956, pl. 1) (see fig. 38), showing that it is an extensive rock unit; it hasundergone kaolinization and epidotization (Schrader, 1915, p. 301).Metallization, which has been found for 600 ft along strike and 500 ft down dip,occurs both as large lenses that parallel the Mowry fault and as mantos, following limestonebedding. The latter is present at the North Mowry Mine (Schrader, 1915, p. 302-303; Smith,1956, p. 33). This manto-type development also appears to be responsible for the formationof the extensive, main part of the Mowry Mine No. 1 ore body, as exposed uy the No. 4 shaft(fig. 39). The quartz-poor ores are composed of argentiferous cerussite, galena, anglesite, andbindheimite. Pyrite and other sulfides are not major components until the 400-ft level isreached. The layered gangue is hematite, pyrolusite and psilomelane (Schrader, 1915, p. 302-303), which was eventually worked as manganese ores at the Beyerle pit, to the NE. (fig. 38).Deep oxidation (down to 300-ft level) and the segregated layering of iron-andmanganesegangue appear to be major contributors to the historical economic viability of thisore deposit.Additional metallization along bedding planes and subparallel faults is found at theNorth (Old) Mowry Mine, also known as the main Bullwacker deposit (fig. 38). The mainBullwacker deposit consists of discontinuous fracturing in limestone that bears manganeseoxides. This zone is 100-ft-wide and trends N. 45 °w. for over 500 ft along strike to the SE.The deposit is composed of small, widely spaced fractures. The mined zone, which is at theBullwacker main shaft, is 10-ft-wide, extends for 60-ft along strike, and is oriented N. 60 ° W.,NE. 40 ° . It is characterized by erratic distribution of higher-grade zones among low-gradezones. The shaft workings are inclined (probably to the NE.) and expose the deposit downdip for 130 ft. About 40 ft NE. of the Bullwacker main shaft is a 100-ft+-deepshaft witha level and drifting at 35 ft. It follows manganese oxides on a N. 30 ° E., steeply NW.-dipping,narrow fracture. Another 100 ft to the NE. is a 40-ft-deep inclined shaft on an 8-ft-wideA124Ii!IIIIIIIIiIIiIIiI

iili¸IIIII-IIIIIIIIIIImanganiferous fracture (N. 40 ° W., NE. 60 ° ) with 3% Mn. (See Farnham and others, 1961,p. 163-164.)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Mowry Mine. Mining for lead-silver ores at this overall area began approximately in thelate 1600's, and was continued later (pre-1850's) by Mexicans. After the 1853 GadsdenPurchase, prospectors from the U.S. became involved, staking claim to the Mowry Mine in1858. U.S. Army Lieutenant Sylvester Mowry purchased the claims in 1859, named the siteafter himself, and began a lucrative mining operation for oxidized, rich, lead-silver ores thatlasted from about 1859 to 1862. At that time, Mowry was arrested and the mine was seizedby the U.S. Government on the grounds that the Lieutenant was supplying lead forammunition to troops of the Confederate States of America. Mowry was jailed for two years,beginning in 1864, while the mine was high-graded and gophered by claim jumpers, cavingworkings and ruining reserve blocks (Schrader, 1915, p. 296; Smith, 1956, p. 2).Total mine production of lead-silver ores, since the Mowry Mine was added to U.S.territories, is estimated at 200,000 st of average 4% Pb, 3 oz Ag/st, and minor Cu, Zn, Au.This production was between about 1859 and 1952, but production since 1909 has beenminor and very sporadic (Smith, 1956, p. 2; Keith, 1975, p. 81). Mowry Mine was thesecond-leading lead producer in Arizona in the very early 1900's, following Tombstone, AZ(Schrader, 1915, p. 297).Composite workings are considerable. By 1915, there were 12,000 ft of workings atMowry Mine on 13 levels, including 2,500 ft of shafts (see fig. 39) (Schrader, 1915, p. 297).In the next 40 years, little else was excavated, except for stoping and drifting in the upperand middle No. 2 ore body, and a SW. drift off the No. 2 shaft that runs under the WestEnd/No. 4 ore body workings (Smith, 1956, pl. 3). Most workings were inaccessible due tocaving at the time of Smith's (1956) work.Other outcropping manganiferous gangue along the Mowry fault was mined at theBeyerle pit (fig. 38), with totals of 7,500 long tons of 25% Mn produced during WWl andWWII (Keith, 1975, p. 81). In 1955, 10,000 tons [It?] of ore was produced from the BeyerlePit (fig. 38) (Smith, 1956, p. 2, 37). The 100-ft-deep shaft, with drifting, located at the W.end of the Beyerle pit, and the 40-ft-long adit E. of Reyerle pit were opened for manganesedevelopment; limited (unquantified) production came from the shaft, which caved by 1957.At East End shaft (fig. 38), which is at least 160-ft-deep (Smith, 1956, pl. 1) with threelevels 14, manganiferous lead-silver ores were mined, historically, for their lead and silvercontent. Rehabilitation of the shaft and further excavation by Southwest MetallurgicalIndustries, an affiliate of Ventures, Ltd., Canada, took place in 1954 and 1955. Noproduction is known, but data are limited. (See Farnham and others, 1961, p. 1623 ThisEast End shaft may have originally been part of the North (Old) Mowry Mine (see below).North (Old) Mowry Mine and the Bullwacker deposits. Manganiferous mineralizationat the Bullwacker deposits (fig. 38) was mined at three different times when the FederalGovernment was supporting manganese prices. In the WWI era, 5 carloads of approximately40% Mn were shipped from the site; the grade was achieved through hand sorting. A USBMmanganese appraisal program of 1941 included mapping and sampling of the workings (maps14 Drifts off the shaft extend W. for at least 150 ft along the manganiferous fault/contact zone (Farnham and others, 1961,p. 162).A125

not found by the author), and resulted in a determination of grade ranging from "a few percent" Mn to 28% Mn (in 56 samples), and 0.8 oz Ag/st to 7.4 oz Ag/st (in 15 of the 56samples). Mining byH. Woodruff, tessee, in 1942, resulted in several carloads of manganeseores being shipped to the Deming, NM facilities of the Metals Reserve Co. (grades, tonnagesnot recorded). Athird episode of mining came in 1952, as Karl Peterson purchased the siteform A. S. Henderson's estate and shipped 200 It of 18.9% Mn ore to the U.S. Governmentpurchasing depot in Deming, NM. Part of this ore failed the Government specifications foramenability to beneficiation via flotation, and Peterson was notified that no additionalshipments would be accepted. The operations closed and there was no activity during thelast USBM visit in June 1957. (SeeFarnham and others, 1961, p. 163.)Initially, the North (Old) Mowry Mine (fig. 38) was worked for lead carbonate in agangue manganese and iron oxides. Its deepest working in 1915 was a 120-ft-deep shaft(Schrader, 1915, p. 305-306). That site was likely the main Bullwacker shaft or the shaft tothe NE. (fig. 38). Another report is that the site was worked for silver as early as 1880(Farnham and others, 1961, p. 162).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Manganese at the Bullwacker and Beyerle sites. The metal most recently of economic interestin this area, manganese, has not been of interest since Ventures Ltd., of Canada, sankexploratory drill holes along the Mowry fault in 1955 and 1956, to find more manganese orelike that mined at Beyerle pit. The exploration was not successful (Smith, 1956, p. 2, 38).The presence of manganese in the concentrations that were mined is significant, eventhough past exploration did not find additional economic concentrations. Few data concerningthis exploration are known byUSBM. The site could be considered an exploration target fordomestic manganese that might be needed for future emergencies. The U.S. is essentially100% dependent on foreign sources of supply for this critical and strategic metal.USBM testing (late 1950's) of the Bullwacker manganese-oxide deposits NE. of MowryMine (Farnham and others, 1961, p. 164-165) determined the following. A composite, 350-1bsample from mine dumps assayed 15.7% Mn, 42.3% CaCO 3, 0.03% Cu, and is composedof fine-grained intergrowth of calcite, wad, pyrolusite, and traces of lead, zinc, and barium.Bench-scale experimentation for beneficiation of this material was attempted.. Sink-floatbeneficiation failed, because to material could be upgraded to only 25% Mn.Another USBM test was grinding to -100 mesh and -200 mesh, and attempting bulkand selective flotation with oil emulsion. Manganese recovery was 77.6%, but the flotationfroth contained only 34.4% Mn. Problems were attributed to dilution of the froth by calciteand silicates, and inherent low grade of the manganese wad. The grinding costs would nodoubt be prohibitive in a commercial operation.Sulfur-dioxide leaching by USBM was more successful, allowing recovery of 87% ofthe Mn from minus 1/4-in. fragments and 70% of the Mn from minus 1/2-in. particles.However, the high calcite content of the ores led to excessive sulfur dioxide consumption.Available data suggest that calcite content of the ore and the low tonnage of thedeposits are major negative factors in the economics of the Bullwacker manganese deposits.Low silver content, coupled with low tonnage and sporadic nature of the metallization suggestthat no silver resource is present here either.Manganese at the Mowry Mine. More testing of the manganese-oxidegangueattheMowryMine very likely will reveal higher tonnages than those at the Bullwacker site and possibly thanA126IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIat the Beyerle site, based on Schrader's (1915) description of the lead-silver ore gangue.However, little is known about the manganese grade, and the high-calcite problemencountered at the Bullwacker deposits should be suspected to occur at the Mowry Mine also.Much of the Mowry Mine manganese gangue may be unminable due to historical lead-silverore stoping on the metallized zone and deterioration and caving of the old workings.While much more field data are needed to characterize the Mowry Mine depositspecifically for manganese, it is certain to be uneconomic under present market conditions dueto overall manganese grade. It is however, even with the current data gap, a futureexploration target for the emergency supply of domestic manganese. The Hardshell Inclineand Hardshell manto deposits are more likely to be developed first, though, because of morefavorable metallurgical characteristics and higher tonnages. A more rigorous search intoliterature or company exploration files that would define the true nature, size, andconcentration of the manganiferous deposits at Mowry Mine would be the logical first stepin further quantification of this site.Lead-silver, copper, and gold. The lead-silver ores rapidly pinch out at depth in the fourknown ore bodies of Mowry Mine (Schrader, 1915, p. 297-298; Smith, 1956, p. 34). Zincis relatively rare. The resource situation for copper and gold may be much more favorable.The vertical metal zonation in the mined zone shows that a pyritiferous copper zone was justbeginning to be exposed in the 400-ft level off the No. 3 shaft, at the greatest depths ofdevelopment. Higher grades of copper were encountered in the SW. drift off the No. 2 shaftthat runs below the No. 4 ore body. In between, at the bottom of the No. 2 shaft, goldconcentrations of 0.15 oz Au/st to 0.60 oz Au/st were encountered. These increases incopper and gold content coincide with increased silicification (Smith, 1956, p. 34, pl. 3;Schrader, 1915, p. 297).Drilling below the old workings at 500-ft-plus depths may be judicious to evaluatewhether copper and gold concentrations continue increase to amounts that would warranteconomic interest under 1994 market conditions. Examination of two subparallel fault zonesthat are 1,400-ft and 2,500-ft N. of the Mowry fault (Simons, 1974, map) may revealadditional metallization, though nothing could be speculated about its tenor.Milling and mine waste, mine subsidence.A smelting and reduction plant was on the site in the Lt. Mowry years, consisting of12 adobe smelters. Mowry Mines Co. installed a concentrator and 100 stpd smelter about1904 to produce lead-silver bullion. By 1907, crude ores were being shipped. Theconcentrator and blast-furnace type smelter were still on the property in 1914, but theconcentrator was destroyed by a lightening-induced fire in Sept. 1914 (Schrader, 1915, p.296-298). An old photograph in Schrader (1915, pl. 22) shows extensive mine dumps andpossibly mill tailings and smelter residues by the main part of the mine workings and at theadjoining mill and smelter sites.Smith (1956, p. 33; pl. 3) points out surface or near surface mine subsidence fromcaving of old workings at the Mowry Mine. Underground levels at the Bullwacker deposit asshallow as 35-ft suggests the possibility for surface subsidence there if underground driftseventually cave.A127

Samplenos. NONE COLLECTED PI. 1Paradise Canyon Mine[aka Sunshine Mine, and D. D. Walsh propertyNot examined.owners name)]GEOLOGY.Shaft excavated through placer gravels in intermittently flowing stream channel in anattempt to reach the gravel-bedrock interface and explore that interface for placer gold. Nomapping of the gravels was done. Source of the gold, if any is present, is the WashingtonCamp/Duquesne Camp metallized area (see fig. 30).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The claim apparently first attracted the mineral exploration interest of D. D. Walsh in1961. By 1976, the owner-operator was Ray Parent. By November 1983, the shaft hadflooded. It is not known if the shaft was completed or if any gold was found or mined. Datafrom ADMMR files, 1976, Phoenix, AZ. Property also listed in USBM MILS database (propertyno. 0040230312).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.None possible with the absence of data. Size of the placer, presence or absence ofgold in it, gold concentration must be known to complete an assessment. Quantity of waterthat flows in the canyon is another major consideration. The amount of water is likely muchless than ideal for placering. Harshaw district placers are more likely to see future work,based solely on the proximity of water.A128IIIIIIIIIIIIIIIIIII

IIIIIIIlI!IilSample nos. NONE COLLECTED PI. 1Parker Canyon workingsSite on Federal surface. Not examined. Data from existing literature, as cited.GEOLOGY.The area is described as having vein and/or replacement deposits of lead, silver, andcopper, with a small amount of gold. These were deposited possibly in late-Cretaceous time(Keith and others, 1983, map 18).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Mining took place in 1933, when less than 100 st of ore was produced. Recoveredmetals amount to 500 Ib Pb, 200 Ib Cu, 100 oz Ag, an un-specified quantity of gold (less than100 oz Au). Type, size, and number of mine workings are not reported (Keith and others,1983, map 18). The 1-mi by 1.5-mi area in which metallization is inferred to occur or to bepossible (Keith and others, 1983, map 18) is reproduced in this USBM report on pl. 1. Theprecise locations of workings within that area were not reported by Keith and others (1983,map 18).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Sparse available data suggest that this site is a minor occurrence that would not beeconomical to mine further under 1994 economic conditions, though it would be judicious toexamine the site before completely eliminating it from further consideration as a mineralresource site. Location of the site within the Parker Canyon caldera (fig. 2) and the tentativeage assigned by Keith and others (1983, map 18) suggest the metallization is geneticallyrelated to the Parker Canyon caldera. Finding-small, metalliferous, base-and-precious metalvein deposits associated with calderas is not unusual. Few deposits of this type, except thosewith high gold content, are economical to mine under 1994 economic conditions; thetonnages available are just too low. There is no evidence to date of appreciable goldconcentration the Parker Canyon workings.lA129

Sample nos. NONE COLLECTED PI. 1Patagonia or Mowry gold placersNot examined.Data are from literature, as cited.GEOLOGY.No mapping of the placer deposits is known by USBM and locations are imprecise.Amounts of gravels present are not known. The possible sources of the placer gold are theJackalo-Paymaster vein (fig. 50, 52) or other veins on Guajolote flat, and possibly themetallized part of Mowry fault (fig. 38).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.Most of the individual placer workings in the Patagonia Mountains area are consideredto be in one placer group: the Patagonia or Mowry placers, which comprise four or fiveindividual sites south of Mowry camp, between Guajolote flat on the west and points onMowry Wash about 1.25 misoutheast of Mowry camp. Four of the sites are approximatedon pl. 1 (Schrader, 1915, p. 348); the fifth site is described as "on Guajolote Wash,downstream from the old Mowry smelter" (Wilson, 1961, p. 83). No "Guajolote Wash"appears on any modern topographic maps. The use of the old Mowry camp smelter as areference point suggests that Guajolote Wash and Mowry Wash are one-and-the-same. If so,this Guajolote Wash placering site is approximately central to the other four placer sites thatare shown on pl. 1. Scarcity of water in the area isa problem, forcing some dry washing tobe attempted (Schrader, 1915, p. 348; Wilson, 1961, p. 83); this always reduces goldrecovery.Production history concerning the four sites shown on pl. 1 (about 1 mi. S., SE., andSW. oftheMowry patent group) is sparse. Work in 1906 was driven by unemployment dueto closing of the Mowry Mine; $200 worth of gold was produced that year from the placers(Schrader, 1915, p. 348). Based on the average gold price of that time, $20.67/oz gold(Roberts, 1904, p. 129; McCaskey and Dunlop, 1919, p. 679), cumulative production in 1906was less than 10 oz gold. The placers were worked on a small scale in 1909 by Mexicanminers, returning $0.75/day per worker, on the average (Schrader, 1915, p. 348). Thus theaverage worker was collecting less than 0.04ozgold per day. No cumulative production forthe placer group is known for 1909. The site just east of Guajolote flat (pl. 1) is describedin the most detail. The 5-ft-thick placer gravel beds at the site were worked by dry-washingfor a cumulative 1909 production of 2 oz gold. The Guajolote Wash site mentioned abovewas worked in 1933 by a five-man rocker operation, returning on the average less than $0.50per worker per day (less 0.25 oz gold per day per worker, based on $20.67/oz gold). Thisis the only site for which the recovered placer gold is described: nuggets were found, thelargest at 2 oz, but most of the gold is angular particles, less than 0.1-in in diameter,occurring in abundant black sand (Wilson, 1961, p. 83), which is probably composed ofmagnetite and some hematite.The last recorded gold production from the Patagonia placers is $878 in value that wasmined between 1934 and 1940 (Wilson, 1961, p. 83); that amounts to a total of 25 oz gold[gold price had increased to $35/oz during that time period (Koschmann and Bergenthal,1968, p. 6)]. Location of the sites worked is very imprecise: "claims 12 miles by roadsoutheast of Patagonia" [AZ] (Wilson, 1961, p. 83). It is possible that these claims also arewithin the area encompassed by the other Patagonia/Mowry placers sites shown on pl. 1.A130IIIIIIIIIIIIIIIIIIII

III!IIECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.The Patagonia Mountains area is not rich in primary gold mineralization. Compositeproduction, which was derived mainly from byproduct gold recovery through smelting basemetalores, is less than 12,000 oz gold over the more than 350-year history of mining in themountain range. At least three of the times in which placering was attempted historicallywere driven by unusual economic conditions. The 1906 work at the Patagonia placers wasdriven by loss of the Iocalhardrock mine at Mowry. Mining in 1933 was likely driven by theGreat Depression, as was most U.S. gold mining during that time. The increase of the priceof gold to $35/oz in 1934 caused a significant increase in gold production, nation-wide(Koschmannand Bergenthal, 1968, p. 6). The late 1970's work at Paradise Canyon placerswas likely motivated by unprecedented increases in the price of gold during high inflationaryyears. These geologic and historical economic circumstances suggest that no rich placershave been mined to date or are present in the area.Key data that are lacking for economic assessment are estimates of the thickness andtonnage of gravels available, and the grade of the placers. Gold in the amount of $3.50 to$4.00/ cu yd of gravels is, in general, required for placer mines to be profitable. Goldconcentration at the Patagonia/Mowry placers may be near the economic break-even point,but the lack of water seriously complicates the situation. No complete assessment can bemade with the lack of data on tonnage and grade. It would appear, however, that theHarshaw district placers, outside the National Forest, would be preferable mining targetscompared to the Patagonia/Mowry placers due to the presence of larger and more constantwater sources in Sonoita Creek and Alum Gulch.IIA131

Sample nos.Phoenix claimsNONE COLLECTEDPI. 1, SE, of Mowry Mine areaSite on Federal surface. Not examined. Data that can be cited are fromexisting USBM file data.GEOLOGY.All data classified as confidential (USBM files, IFOC, Denver, CO)HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The claims apparently were valid during the 1940's. No other data are known byUSBM (USBM file data, IFOC, Denver, CO). Location of prospect pits shown on p]. 1.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION,None permissible. Data are classified as confidential (USBM file data, IFOC, Denver,CO). As in the case of allmanganiferous sites in the Patagonia Mountains-Canelo Hill Unit,future exploration or development is unlikely unless emergency supply conditions arise.A132IIIIIIIIIIIIIIIIIII

iiIIIIIIIiISample nos. NONE COLLECTED PI. 1, S. of Mowry Mine areaPollywog claims(formerly J & E claims)Site on Federal surface. Not examined. Data from existing literature, as cited,used in this economic analysis.GEOLOGY.At the N. end of the property (three mining claims), a N.-trending, vertical fracturehosts soft manganese oxides that replace limestone. Overburden obscuring is severe, so thatonly 12-ft of strike length is exposed on this structure. Overburden and slough conceals theother workings. A USBM sample from 1957(?) contains 21% Mn and 8.4% Fe (Farnham andothers, 1961, p. 174).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The claim name comes from a notice of relocation dated April 1953; original claimswere staked in 1941. No production is known (Farnham and others, 1961, p. 174).ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.None possible with absence of additional field data. There is a mapped, NW.-strikingfracture in the area of the claims (Simons, 1974, map). The small size of the knownoccurrence does not encourage further exploration, unless in emergency conditions.I;~!i/t ~;!iA133

Samplenos. NONE COLLECTED Fig. 14, pl. 1Red Mountain copper-porphyry/breccia pipe depositNot to be confused with the Four Metals Hill (Red Hill) copper-porphyrydeposits, which, in the 1940's and 1950's was sometimes referred to as the"Red Mountain" deposit.GEOLOGY.A Tertiary-age (Laramide) copper-porphyry deposit has intruded Tertiary and Mesozoicvolcanic rocks and volcanic sediments (see fig. 14)(Corn, 1975, p. 1,439). Highest gradesof primary (hypogene) metallization are within the potassic alteration zone, at depths of3,000-ft to 5,000-ft below the surface. Other, lower grade, disseminated primary coppermetallization (about 0.10% Cu), in the form of enargite occurs about 2,500 ft above thehighest grade zone (fig. 14). At one time, supergene processes developed a classic, nearhorizontal copper-porphyry type chalcocite blanket by natural leaching from this disseminated,lower-grade, enargitezone. Drilling results have suggested that this chalcocite blanket mayhave contained 0.60% Cuto 1.00% Cu through a few hundred ft of thickness. However, thechalcocite blanket has been leached and partly destroyed by subsequent supergene processesthat followed late-Tertiary uplift of the Patagonia Mountains, and in its present form does notrepresenta resource. The most recently leached copper has not re-concentrated in any areaconcise enough or concentrated enough to form another chalcocite blanket resource (Corn,1975, p. 1,445).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The site has never been mined. An exploration program by Kerr-McGee Corp. begunin 1961 focused first on the chalcocite blanket (fig. 14). Realizing that the blanket wasdeteriorated by additional, later downward migration of copper, a deeper drilling program wasinitiated to find a "redeposited" chalcocite blanket. That drilling led to discovery of thehighest-grade hypogene (primary) copper mineralization (Corn, 1975, p. 1,438-1,439), andeventually, the delineation of the 250 million st resource.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.Mining of the zones of the highest grade, disseminated, hypogene copper, and copperin the breccia pipe (fig. 14), under 1994 market conditions and copper price would not beeconomic, primarily due to depth to deposit. The deposit has a rather high grade, comparedto other copper-porphyry type deposits, but economic viability of such deposits is linked veryclosely to the economies of open-pit mining. Those economies are lost on a deposit as deepas Red Mountain.The USBM PREVAL economic model for this deposit, which represents the results ofits hypothetical mining, based on data available to the USBM, results in the following.Commodity price used: Copper, $0.90/Ib.Resource tonnage, grade, type: 250 million st, 0.72% Cu, hypogene sulfide copper.Mining and milling methods, rates, and costs: Sublevel stope, 37,600 stpd ($6.50/st);Flotation milling, 28,000 stpd, ($4.30/st).Recoveries: 85% (mine), with 15% dilution. 91% of the Cu at the flotation mill.Mine life: 25 years with 3 pre-production years.A134IIIIIIIIIIIIIIIIIII

I!Capitalization costs: mine, $40 million; mill, $85.4 million.Transportation: Flotation mill on site; truck concentrates to Nogales, AZ (16 mi); railconcentrates to Cananea, Mexico (125 mi).NPV: -$369 million at 15% ROR.!ii,•!i! I ~ ~i ~II! ~, ~j'I:mI !A135

Samplenos. NONE COLLECTED PI. 1San Antonio Canyon gold placerNot examined.GEOLOGY.Placer gravels in intermittently flowing stream channel of San Antonio Canyon. Nomapping of the gravels is known. Source of the gold is the Washington Camp/DuquesneCamp metallized area, which is in part drained by San Antonio Canyon (see fig. 30).HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The site was reportedly active in 1990 (J. R. Thompson, USBM, 1990, writtencommun.), but no documentation of that information was recorded. No other data are known.ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.None possible with the absence of data. Size of the placer, presence or absence ofgold in it, gold concentration must be known to complete an assessment. Quantity of waterthat flows in the canyon is another major consideration. The amount of water is likely muchless than ideal for placering. Harshaw district placers are more likely to see future work,based solely on the proximity of water.A136IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIISample nos. NONE COLLECTED Fig. 3Ventura copper-moly breccia pipe depositNot to be confused with the Ventura Mine (fig. 3), which is not underlain by theVentura breccia pipe deposit.GEOLOGY.This breccia pipe, of probable Tertiary-age (Laramide), intrudes Mesozoic-age graniticand monzonitic rocks (Simons, 1 974, map); it is exposed at the surface (AGDC, 1967, map)and extends to a depth of 2,600 ft (Win. Lundby, former Noranda geologist, oral commun.,1993). Other data which characterize the deposit (Davis, 1977, p. 2) are the following.Drilling the steeply-inclined breccia pipe led to resource assessments of 3.6 million st ofaverage 0.402% Mo and 0.25% Cu. These tonnages were derived through a 32-hole drillingprogram by Noranda Mines, Ltd., in 1965. Molybdenum content decreases with depth.HISTORY, DEVELOPMENT, OWNERSHIP, PRODUCTION.The site hasnever been mined. Exploration work by Noranda Mines, Ltd., andASARCO, Inc., from 1965 to 1976 delineated this deposit. (See Davis, 1977.)ECONOMIC ANALYSIS AND ENGINEERING DOCUMENTATION.A USBM model of hypothetical mining and economics of development of the Venturabreccia pipe deposit, constructed with the PREVAL estimation program, indicates the depositis not economical to mine under early 1994 economic conditions. It is unlikely that thisbreccia pipe deposit ever would be developed alone because of low tonnage and grade. Codevelopmentwith the Ventura copper-porphyry deposit, discussed below, may be feasible.The USBM PREVAL economic model for this deposit, which represents the results ofits hypothetical mining, based on data available to the USBM, results in the following.Commodity price used: Copper, $0.90/Ib; molybdenum sulfide (MoS2), $3.35/Ib.Resource tonnage, grade, type: 6.3 million st, 0.26% Cu, hypogene sulfide copper; 0.28%MoSpMining and milling methods, rates, and costs: Sublevel stope, 2,400 stpd ($10.00/st);Flotation milling, 1,800 stpd, ($10.O0/st).Recoveries: 85% (mine), with 15% dilution. 91% of the Cu and 63% of the molybdenumat the mill.Capitalization costs: mine, $8.4 million; mill, $15.6 million.A137

IIIIIIIIIIIIIIIiAPPENDIX BSample descriptions,Patagonia Mountains/Canelo Hills Unit, Coronado National Forest, AZBackground dataData collection. All field notes have been reviewed for descriptions of geologic, structural,and environmental characteristics at mine and sample sites, including host rock, structuralorientations and extent, relative and specific positions of mine workings, and size andcomposition of mine dumps. All such data are included in this appendix if they were collectedin the field.Sampling methods. All samples collected and assayed during this study were composed ofrock chips. The rock samples were most often collected from mineralized structures observedin the National Forest. Wherever possible, these samples were taken as continuous or semicontinuouschips perpendicular to the strike of the mineralized structure, thus representing across section through the structure. Samples represent reconnaissance-level sampling (i.e.low density of sample sites). Each rock-chip sample was 3 Ib to 10 Ib in weight. Sample typedefinitions are as follows. Chip samples are a regular series of rock chips taken in acontinuous (or semi-continuous) line across a mineralized zone or other exposure, and usuallyacross the entire width or thickness of that exposure. Grid and grab samples are frommine/prospect dumps. The grid type are taken systematically over an area to convey possiblemineral value distributed in a dump. The grab type are taken unsystematically, usually as abackground check, where no specific mineral zone is known or expected. In some cases, grabsamples may be collected from an outcrop, for similar reasons. Select samples are often froma mine/prospect dump and are select chips of a specific rock type; select samples can alsobe collected from an in-place mineral structure to convey assays for the specific zone.Samples noted as "high-grade" are select samples collected from the most intenselymineralized (usually metallized) rock available in dumps, outcrops, or other exposed mineralzones.Sample preparation procedures (for assay). The rock samples were prepared for assay asfollows. The entire sample was crushed to -20 mesh in size, with no sieving, via a jawcrusher and cone crusher, and then the entire crushed output was homogenized in a rifflesplitter. A 200 gram to 300 gram split was segregated and pulverized in a shatterboxpulverizer to -125 mesh or smaller, with no sieving. The pulverized pulp was divided equallyinto two kraft paper envelopes, producing two 100-gram to 150-gram pulp splits. One pulpspilt was stored as an archive. The other was sent to laboratories for assay procedures.B1

Appendix B--Sample descriptions, Patagonia Mountains/Canelo Hills Unit,CoronadoNational Forest, AZSampleNumber Type Length RemarksPAlPA2PA3PA4PA5PA6PA7PA8PA9PAl0ChipChipChipChipSelectSelectChipChipChipChip30 ft15 ft7.0 ft45 ftXXXXI .0 ft3.0 ft2.0 ft0.5 ftOutcrop of highly fractured zone (N. 10 ° W., vertical)in andesite with stockwork hematite and limoniteveinlets, pyrite casts. See pl. 1.Outcrop of highly altered fractures (N. 45 ° W.,vertical) in friable, porphyritic andesite with abundantlimonite. Only the most heavily altered part of zonewas sampled. See pl. 1.Wallrock adjacent to (NW. of) sample PA4;weathered andesite, sparse malachite. See pl. 1.Silicified fracture zone (N. 70 ° E., NW. 55 °} throughandesite, contains sparse malachite, hematite,manganese oxides. Zone drifted on by an 8-ft-longprospect adit (not mapped). Sample across aditportal. Seepl. 1.Sansimon Mine, flooded shaft, sunk in Laramideandesite, conceals perhaps 75-ft of undergroundexcavations, estimated from dump size. Sample:quartz with galena and sphalerite, from dump. Seefig. 22.Sansimon Mine, dump PAS. A second select samplefrom the dump: vein quartz, pyrite, sparse galenaand sphalerite. See fig. 22.Sansimon Mine, shaft PA5-6; fault (N. 53 ° E-, 83°NW.) at shaft collar. Sample: altered andesite,gouge. See fig. 22.Sansimon Mine, 25-ft-long adit, driven NW. on fault(N. 5 ° W., 55 ° NE.) in Laramide andesite. Sample:altered andesite, hematite, gouge (full width of fault).See fig. 22. Adit not mapped.Sansimon Mine area, prospect pit excavated on fault(N. 68° E., vertical) in Tertiary-age rhyolite. Sample:rhyolite, disseminated pyrite, hematite, gouge. Seefig. 22.Sansimon Mine, adit PA10-13. Sample: fault,abundant hematite, quartz, sparse sphalerite andgalena. Cuts fault PAl1-13. See fig. 22.B2IIIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIPAllPAl2PAl3PAl4PAl5PAl6.ChipChipChipChipChipSelect1.5 ft2.0 ftSansimon Mine, adit PA10-13. Sample: fault PAll-13, rhyolite porphyry, limonite, disseminated pyrite.See fig. 22.Sansimon Mine, aditPA10-13. Sample: fault PAll-13, quartz, gouge, pyrite, sparse galena andsphalerite. See fig. 22.2.5 ft Sansimon Mine, adit PA10-13. Sample: fault PAll-13, rhyolite porphyry, limonite. See fig. 22.1.0 ft4.0 ftXXSansimon Mine, caved adit, apparently crosscutsfault (N. 83 ° W., 75 ° NE.) at portal. Sample:quartz, disseminated pyrite. Estimated to concealonly 50 ft of underground workings, based on dumpsize. See fig: 22.Sansimon Mine area, flooded prospect adit, probablyonly 4-ft to 10-ft-long. Intersects fault (N. 80° W.,85 ° SW.) in andesite, apparently at portal. Sample:andesite, gouge, hematite. See fig. 22.Unnamed prospect adit PA16-17, driven S. 45 ° W.for about 45 ft on a quartz vein (N. 45 ° E., 80 °NW.) with 10% sulfides that cuts through diorite.Sample: diorite, vein quartz, disseminatedchalcopyrite, sphalerite, from dump. See pl. 1.PAl 7 Select XX Prospect PAl 6; cupriferous breccia with chalcocite,from dump. See PAl6; pl. 1.IIPAl8 Select i XX ' Outcrop; silicified conglomerate, manganese oxide,hematite. See fig. 20.IPAl9 Select XX Outcrop; quartzite, fault (N. 65 ° E., 55 ° NW.},manganese and hematite stains. See fig. 20.,,- IPA20 Chip 10 ft Outcrop; siliceous zone, strikes W., unknown dip,hematite. See fig. 20.IPA21 Chip 2.0 ftPA22SelectXXCaved adit, dump washed away; shear zone (N. 65 oW., vertical). Sample: trachyte porphyry, quartz,hematite, gouge. See fig. 20.Outcrop; highly altered volcanic rock, abundanthematite stockwork. See fig. 20.B3

Appendix B -(Patagonia Mountains Canelo Hills Unit)- contin.SampleNumber Type Length RemarksPA23PA24PA25PA26PA27PA28PA29SelectSelectSelectSelectSelectChipChipXXXXXXXXXX30 ft3.0 ftFrisco Fair claims, pit (10-ft by 4-ft and 4-ft-deep)and trench (20-ft by 1-ft and 1-ft-deep), sloughed,both in Laramide volcanic rock (Keith, 1975, p. 82).Sample: brecciatedrhyolite, abundant hematite,argillicalteration. No structure visible. See fig. 20.Frisco Fair claims, shaft, about 150-ft-deep, on vein(N. 80 ° E., vertical) in Laramide andesite (Keith,1975, p. 82). Sample: vein quartz, disseminatedpyrite from 4,500 ft 3dump (about 200 st). Veincontinuous between shaft of PA24-25 and pitsPA26-27. See fig. 20.Frisco Fair claims, same shaft dump as PA24. Asecond select sample from the dump: sugary quartz,disseminated galena. See fig. 20.Frisco Fair claims, trench (35-ft by 2-ft and 12-ftdeep),sloughed, about 100 ft NE. from PA24-25.Sample: gossan, galena, abundant hematite, fromdump. Dump size not recorded. Apparently in samehost rock as PA24-25. Same metallized structure asPA24-25. Individual working not visible at scale offig. 20.Frisco Fair claims, prospect pit (5-ft by 6-ft and 3-ftdeep),about 100 ft NE. of trench PA26. InLaramide andesite (Keith 1975, p. 82) on samefracture zone as PA24-25 and PA26. Sample:aphanitic, acidic igneous rock with abundanthematite stockwork. See fig. 20.Frisco Fair claims, flooded shaft sunk on fault (N.50 ° E., 56 ° SE.) in Laramide andesite (Keith, 1975,p. 82). Sample: andesite, quartz, pyrite, azurite,malachite, manganese oxide, hematite. Faultcontinues to NE. (site PA29). See fig. 20; mine map,fig. 21.Frisco Fair claims, flooded shaft sunk on fault (N.50 ° E., vertical). Sample: silicified, gougy andesite[Laramide (Keith, 1975, p. 82)] with hematite. Samefault as PA28. See fig. 20; mine map, fig. 21.B4IIIIIIIiIIIIIIIIIII

!, ,~%.Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIPA30PA31PA32PA33PA34PA35PA36PA37PA38ChipChipChipChipChipChipChipChipChip2.0 ft4.0 ft2.0 ft2.0 ft20 ft4.0 ft2.0 ft1.0 ft1.0 ftFrisco Fair claims, prospect adit PA30-31, partiallycaved, driven on fault (N. 80 ° E., 60 ° NW.) inLaramide andesite (Keith, 1975, p. 82). Sample:fault zone (same as PA31), with manganese oxidesand abundant hematite staining. See fig. 20; minemap, fig. 21.Frisco Fair claims, prospect adit PA30-31, fault zonePA30. Sample: slightly silicified fault zone materialwith minor oxidized copper minerals. See fig. 20;mine map, fig. 21.Frisco Fair claims, prospect adit PA32-33, 40-ft-long,trending S. 60°W. along a fault (N. 60 ° E., 65 °NW.) in Laramide andesite (Keith, 1975, p. 82).Mine map in USBM files, Denver; not included withthis report. Sample: fault zone approximately 15-ftin from portal; andesite with argillic alteration,breccia, gouge, hematite, manganese oxides. Seefig. 20.Frisco Fair claims, adit PA32-33. Sample (from aditface): andesite with argillic alteration, quartz, pyrite,gouge, hematite. See PA32; fig. 20.Outcrop of altered acid, porphyritic rock on eitherside of siliceous fracture (N. 75 ° W., vertical) withabundant hematite. See fig. 20.15-ft-long prospect adit intersects fault (N. 85 o W.,56 ° NE.) through Laramide andesite (Keith, 1975, p.82). Sample: abundant gouge; andesite, hematite,at adit face. See fig. 20.Prospect adit PA36-38, driven along faults inLaramide andesite (Keith, 1975, p. 82). Sample:andesite, gouge, hematite. See fig. 20; mine map,fig. 21.Prospect adit PA36-38. Sample: fault zone,andesite breccia, gouge, hematite. See fig. 20; minemap, fig. 21.Prospect adit PA36-38. Sample: fault gouge,hematite, rare pyrite. See fig. 20; mine map, fig. 21.B5

Appendix B--(Patagonia Mountains Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA39PA40PA41PA42PA43PA44PA45SelectSelectChipChipChipChipChipXXXX2.0 ft2.0 ft2.5 ft3.5 ft8.0 ftDepression in brecciated bedrock, possibly is aprospect pit; no dump. Dump may have been erodedinto RedrockCanyon wash. Sample: andesitebreccia, gouge, clay matrix, hematite. See fig. 20.Sloughed prospect pit (6-ft by 5-ft and 2-ft-deep) onpyritic quartz vein (E.-W. strike, dip 65 ° N.) withsparse galena. Sample is from dump. See fig. 20.Prospect adit PA41-44, crosscuts faults in Laramideandesite (Keith, 1975, p. 82). Sample: brecciatedandesite, gouge, quartz veinlets in footwall. See fig.20; mine map, fig. 21.Prospect adit PA41-44. Sample: altered andesite,disseminated pyrite. See PA40; fig. 20; mine map,fig. 21.Prospect adit PA41-44. Fault gouge, disseminatedpyrite, rare malachite. See PA40; fig. 20" mine map,fig. 21.Prospect adit PA41-44. Altered andesite, stockworkhematite, rare pyrite and malachite. See PA40; fig.20; mine map, fig. 21.Prospect trench PA45-46 (40-ft by 6-ft and 8-ftdeep),trends N.-S. Crosscuts fault (E.-W. strike, dip75 ° N.) in Laramide andesite (Keith, 1975, p. 82).Sample: hanging wall, fractured andesite, abundanthematite. Mine map in USBM files, Denver; notincluded with this report. See fig. 20.PA46 Chip 6.0 ft Same trench and fault as PA45. Sample: footwall,quartz, hematite, sparse pyrite. See PA45; fig. 20.PA47 Select XXPA48Chip3.0 ftShaft, about 100-ft-deep, sunk on 4-ft-wide quartzvein (N. 85 ° W., dips 84 ° NE.) in Laramide andesite(Keith, 1975, p. 82) Sample: vein quartz,disseminated pyrite, barite, sparse galena from 7,200ft 3 dump (about 400 st). See fig. 20.Prospect adit PA48-54, driven in acid Laramidevolcanic rocks (Keith, 1975, p. 82); apparently drivento intersect vein PA47. Sample: altered trachyte,abundant hematite, sparse pyrite. See fig. 20; minemap, fig. 21.B6IIIIIIIIIIIIIIIIIII

ii!ililii!Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA49PA50PA51PA52PA53PA54PA55PA56PA57PA58ChipChipChipChipChipChipSelectChipSelectSelect3.0 ft2.0 ft2.0 ft2.5 ft1.5 ft4.0 ftXX3.5 ftXXXXProspect adit PA48-54; altered trachyte, stockworkhematite, disseminated pyrite. See PA48; fig. 20;mine map, fig. 21.Prospect adit PA48-54; altered trachyte, stockworkpyrite, hematite. See PA48; fig. 20; mine map, fig.21.Prospect adit PA48-54; fault footwall, alteredtrachyte, disseminated chalcopyrite. See PA48; fig.20; mine map, fig. 21.Prospect adit PA48-54; fault hanging wall, alteredtrachyte, disseminated pyrite, rare malachite. SeePA48; fig. 20, mine map, fig. 21.Prospect adit PA48-54; fault, altered trachyte,disseminated pyrite. See PA48; fig. 20; mine map,fig. 21.Prospect adit PA48-54; fault, disseminated pyrite.See PA48; fig. 20; mine map, fig. 21.Prospect pit, 10-ft-deep, on 4-ft-wide fault (N. 65 °E., vertical) through Laramide andesite (Keith, 1975,p. 82). Sample: quartz, disseminated pyrite fromdump. See fig. 20.Prospect adit, 5-ft-long (not mapped) driven onsilicified, pyritized fault (N. 75 o E., vertical) inLaramide andesite (Keith, 1975, p. 82). Sample offull width of fault. See fig. 20.Caved shaft (was about 35-ft-deep, based on dumpsize) sunk 6-ft-wide fault (E.-W. strike, dip 80 ° N.) inLaramide andesite (Keith, 1975, p. 82). Sample:leached, pyritic, slightly silicified andesite, raregalena; sphalerite, barite, from dump. See fig. 20.Shaft, sloughed in below 20-ft-depth. Sunk on 2.5-ft-wide silicified zone (N. 60 ° E., 52 ° NW.). Sample:quartz, disseminated pyrite and galena from dump.See fig. 20.B7

Appendix B--(Patagonia Mountains Canelo Hills Unit)contin.SampleNumber Type Length RemarksPA59PA60PA61PA62PA63PA64SelectSelectSelectSelectSelectChipXXXXXXXXXX2.0 ftShaft, sloughed in below 30-ft-depth. Sunk on fault{N. 65 ° E., vertical), in Laramide rhyolite or andesite(Keith, 1975, p. 82). Sample: quartz, calcite, barite,disseminated galena, from 300 ft 3 dump (about 20st). See fig. 20.New York (Jensen) Mine, flooded shaft on 2-ft-widesilicified zone (N. 20 ° E., 70 ° NW.), in Laramideandesite (Keith, 1975, p. 82). Sample: silicifiedandesite with fine, disseminated pyrite in quartzgrains. Dump described as indicative ofa 50-ft-deepshaft. See fig. 20.New York (Jensen) Mine, bulldozer scraping, 20 ftbelow shaft PA60 in hydrothermally altered acidvolcanic rock with stockwork hematite and limonite,rareazurite. Sample high-graded for copper. See fig.20.New York (Jensen) Mine, caved adit. Sample: veinquartz, disseminated pyrite, from remaining 600 ft 3dump (about 30 st). Crosscut to shaft PA63-64.Dump material has been moved by bulldozer, andsome has been removed by erosion. See fig. 20.Part of the main mine workings (see Schrader, 1915,p. 242).New York (Jensen) Mine, shaft, caved at 25-ft depth;sunk on 2.5-ft-wide quartz vein (N. 20 ° E., vertical).Sample: quartz, pyrite, arsenopyrite, hematite fromremains of dump. See fig. 20. Probably part of themain mine workings, but sample is not of originalmining target, which trends NW. (See Schrader,1915, p. 242).New York (Jensen) Mine. Quartz vein PA63,apparently from shaft collar or nearby; abundanthematite, barite, rare malachite. See fig. 20.B8IIIIIIIlIlIIIIlIIlI

i~ ¸ ~i ! •IIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA65PA66PA67PA68PA69PA70PA71PA72SelectChipChipChipGrabSelectSelectSelectXXXXLampshire Mine, shaft, sloughed in at 30-ft depth.Sunk on fault {N. 20 ° E., 75 ° NW.), in Laramideandesite (Keith, 1975, p. 82). High-grade of coppercarbonatestained calcite with rare disseminatedchalcopyrite, from dump. Field notes are unclear--possibly an adit at this site also. Much of dump hassloughed into the shaft. See fig. 20.Lampshire Mine; a second select sample from thePA65 dump: calcite, smithsonite(?), hematite. Seefig. 20.10 ft Prospect pit; altered trachyte, alunite.9.0 ftRandomXXXXXXSulphide prospect, caved adit, driven on 9-ft-wideshear (N. 65 ° E., vertical). Sample: breccia,hematite, malachite from remains of dump. Dumphas been removed for road fill. Schrader (1915, p.244) reports a 2-ft metallized width of the vein, andthat the dip is SE. 75°; further, the host rock isgranitic porphyry. See pl. 1.Sulphide prospect. A second select sample fromdump PA68: aphanitic volcanic rock, rich inmanganese oxides; hematite, sparse malachite. Seepl. 1.La Plata Mine, caved adit, driven to NE. on silicified,manganese-oxide enriched zone throughconglomerate. Andesite dike also present;relationship unknown. Sample. all lithologies,abundant psilomelane, some hematite. See fig. 19.La Plata Mine, 55-ft-deep shaft sunk on andesite-dikefilled shear (N. 68 ° E., 80 ° SE.) throughconglomerate. Sample: mafic zone in dike rock,enriched in hornblende, actinolite, from dump.Extent of shear, dike, to SW. unknown. Dikeextends NE. to site PA73-74. See fig. 19.La Plata Mine, shaft PA71. From high-gradestockpile: highly silicified, sheared conglomerate,psilomelane, calcite. Stockpile size not recorded byUSBM field crews. See fig. 19.B9

Appendix B--(Patagonia Mountains Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA73PA74PA75PA76PA77PA78PA79SelectSelectSelectSelectSelectSelectSelectXXXXXXXXXXXXXXLa Plata Mine, 30-ft-deep shaft sunk on NE.extension of PA71 dike. Sample: hydrothermallyalteredandesite dike, abundant calcite, from dump.Zone (not mapped) likely extends to unsampled,caved adittothe NE. See fig. 19. Dump size notrecorded.La Plata Mine, shaft PA73. A second select samplefrom dump: argillicallyalteredandesitedike withabundant psilomelane. SeePA73; fig. 19.La Plata Mine, 35-ft-deep shaft sunk on silicified zone(N. 65 ° E., vertical) with manganese-oxide veinlets.Sample: conglomerate, psilomelane veinlets,hematite, limonite, from dump. See fig. 19.La Plata Mine, adit, entry blocked by 2 rattlesnakesin 1990. Driven on fault/hydrothermal alterationzone (N. 42 ° W., 78 ° SW.) through conglomerate.Sample: high-grade of stockwork enriched inmanganese oxides (psilomelane), some barite, fromdump. Likely a small adit (less than 50-ft-long). Seefig. 19. Fault extends NW. to within a few tens of ftof site PA75, but apparently does not extend to SE.Hale #3 prospect, partly caved adit PA77-78 (notentered), driven along linear skarn zone (N. 65 ° E.,SE. 70°). Sample: high grade from gossan stockpile;abundant hematite, rare malachite. See fig. 19.Skarn apparently formed by local andesite dike (seePA78-79).Hale #3 prospect, adit PA77-78. Altered andesitedike, abundant hematite, psilomelane, chrysocolla,from dump. This dike apparently formed skarnPA77. See fig. 19.Hale #3 prospect, 30-ft-deep shaft on poorly exposedandesite dike (N. 25 ° W., vertical(?)) throughlimestone. Sample: skarn with calcite, garnet,abundant hematite; from dike/limestone contact. Seefig. 19. Same skarn as PA77. Large rattlesnakeinhabited dump during 1990 field visit.B10IIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA80SelectXXHale #3 prospect, 30-ft-deep shaft sunk on 2-ftwide,andesite dike (N.-S. strike, vertical) throughlimestone and lesser amounts of quartzite. Sample:dike with abundant hematite, psilomelane, raremalachite, from dump. See fig. 19.PA81SelectXXHale #3 prospect, shaft PA80. A second selectsample from the dump: gossan material, composedof goethite, hematite, psilomelane. See fig. 19.PA82 Select XXPA83 Select XXPA84 Chip 2.5 ftHale #3 prospect, adit, entry blocked by rattlesnakein 1990, driven N. 10 ° E. in silicated limestone whereintersected by andesitic, copper-carbonate staineddike (N. 35 ° W.?). Sample: andesite dike, rarechalcopyrite, malachite, from remains of dump.Dump repositioned extensively by bulldozer; noestimate of size. Adit thought to be small (50-ft-longor less). See fig. 19.Hale #3 prospect, adit PA82-83. Skarn from dump:garnet, epidote, rare chalcopyrite. See fig. 19.Hale #3 prospect, pit (10-ft by 4-ft and 4-ft-deep) onlinear silicated zone (N. 60 ° W., vertical). Sample:skarn, garnet, epidote, hematite, rare malachite,apparently full width of structure. See fig. 19.PA85SelectXXHale #3 prospect, sloughed pit (8-ft by 8-ft, 4 ftdeep)on 2-ft-wide gossan zone (N. 10 ° W., dipcannot be determined) in quartzite. Probably aweathered silicated zone. Sample: gossan, quartz,abundant hematite, rare azurite, from dump. See fig.19.PA86Chip2.0 ftHale #3 prospect, pit (dimensions not recorded) onfracture (N. 55 ° W., vertical) in andesite. See fig.19.PA87Chip4.0 ftMeadow Valley Mine, caved shaft sunk on 2-ft-widefault (N. 25 ° W., 42 ° SW.) in aphanitic volcanicrock. Sample: fault zone and hangingwall; abundanthematite, rare malachite. Dump has been flattenedby bulldozer (drill pad?). See fig. 19. Reportedly thesite of a 70-ft-deep shaft with a 30-ft-long incline atthe bottom (Schrader, 1915, p. 243).Bll

Appendix B (Patagonia Mountains Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA88PA89PA90PA91PA92PA93SelectSelectChipSelectChipSelectXXXX4.0 ftXX3.0 ftXXHomestake prospect, shaft, flooded at 10-ft-depth,sunk on quartz breccia through andesite. Sample:quartz breccia, andesite, calcite from dump. Dump is"small", suggesting 40-ft-deep shaft. See fig. 19.Schrader's reported 160-ft-deep shaft with a 40-ftlongcrosscut at the bottom is either this site or sitePA89.Homestake prospect, shaft, flooded at 6-ft-depth,sunk on fault (N. 65 ° E., 80 ° SE.) with brecciathrough andesite. Sample: quartz breccia, abundanthematite, calcite, from dump. Shaft depth estimatedat 20ft, based on dump size. See fig. 19.Prospect adit and open cut, possibly of ChristmasGift or Elevation mines. Both workings trend S. 30 °W.; 25-ft-long open cut is likely just caved, formerportal area of adit. Adit, 20-ft-long, intersects fault(N. 65 ° W., 76 ° SW.) within 5 ft of portal. Sampleof fault from SE. rib: rhyolite breccia, hematite,limonite, disseminated pyrite. A 60-ft-deep winzesunk on PA90 fault against NW. rib. Mine map inUSBM files, Denver; not included in this report. Seefig. 18.High-grade stockpile (tonnage not recorded) outsideadit PA90; barite, quartz, limonite, pyrite. See fig.18. Mine map in USBM files, Denver; not included inthis report.Shaft, 12-ft-deep, possibly part of Christmas Gift orElevation mines, sunk on fault (N. 65 ° W., vertical) inrhyolite of Red Mountain. Sample: silicified rhyolite,hematite, from dump. See fig. 18.Christmas Gift Mine, shaft sunk on Laramide,porphyritic andesite. Sample: altered andesite,disseminated pyrite, from dump. Estimated 300 ft ofunderground workings, based on dump size (11,000ft 3,orabout 550 st). See fig. 18.B12IIIIIIIIIIIIIIIIIII

i.IIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA94PA95PA96PA97PA98PA99PAl00PAl01SelectSelectChipChipChipChipChipChipXXXX5.0 ft4.0 ft3.0 ft4.0 ft3.5 ft3.0 ftChristmas Gift Mine, caved shaft sunk on Laramideporphyritic andesite and aphanitic rock. Sample:porphyritic andesite, hematite stringers, from dump.Shaft was timbered, lO0-ft-deep in 1915 (Schrader,1915, p. 265). See figo 18.Christmas Gift Mine, timbered shaft sunk onLaramide andesite with disseminated pyrite. Sample:andesite, disseminated pyrite, sparse barite andgalena, sparse malachite, from dump. Shaftestimated to conceal 500 ft of workings, based ondump size (7,000 ft 3, or about 400 st). Shaft opento 40-ft-depth in 1990. See fig. 18.Prospect pit at Christmas Gift Mine excavated onfault (N. 54 ° W., 80 o SW.) in Laramide andesite.Sample: altered andesite, breccia, gouge, hematite.See fig. 18.Prospect pit, 10-ft by 4-ft and 10-ft-deep, excavatedin horizontal rhyolite flows. Part of Christmas Gift orElevation mines. Sample: rhyolite, abundanthematite. See fig. 18.Prospect adit, 30-ft-long, driven NW. along fault (N.65 ° W., 67 ° SW.) in Laramide andesite. Sample:altered andesite, hematite, limonite, disseminatedpyrite, collected at adit face. Mine map in USBMfiles, Denver; map not included with this report. Seefig. 18. Part of Christmas or Elevation mines.Prospect pit on fault (N. 83 ° W., vertical) in Laramideandesite. Sample: full width of fault; alteredandesite, hematite, disseminated pyrite. See fig. 18.Part of Christmas or Elevation mines.Prospect pit on fault (N. 36 ° E., vertical) in Laramideandesite. Sample: altered andesite, quartz,hematite, limonite. See fig. 18. Part of Christmas orElevation mines.Prospect adit of Elevation Mine group, trends N. 23 °W. for 20 ft, following siliceous zone throughporphyritic rhyolite of Red Mountain. Sample:rhyolite, disseminated pyrite, hematite in siliceouszone at adit face. No mine map made. See fig. 18.B13

Appendix B--(Patagonia Mounla,ns Canelo Hills Unit) conlm.SampleNumber Type Length RemarksPAl02PAl03PAl04PAl05PAl06PAl07PAl08PAl09SelectSelectSelectSelectChipChipChipSelectXXXXXXXX6 ft4.5 ft5.0 ftXXElevation Mine group. Shaft, 70-ft-deep, excavatedon shear (N. 70 ° E., 70 ° SE.) in leached, baked,sericitizedzone. Sample: leached, baked rock,pyritic, with disseminated chalcocite(?), sparsegalena, from dump (3,600 ft 3, or about 180 st).Shaft may intersectadit PAl04. See fig. 18.Elevation Mine group; same shaft dump as PA102.Sample" breccia, hematite, cerussite. Breccia notexposed; extent unknown. See fig. 18.Elevation Mine group, caved adit, trends N. 45 ° W.through leached, pyritic, sericitized rock like that ofPAl02. No structure found. Sample: pyrite, barite,hematite, rare chalcopyrite, from dump. Estimated200-ft of underground workings, based on dump size(21,000 ft 3,orabout 1,100 st). See fig. 18.Main crosscut adit of Elevation Mine group, caved500-ft in from portal. Driven through pyritic rocks,both rhyolite of Red Mountain, and Laramideandesite. Adit was 600-ft-long in 1915, intersectingE.-W. trending, vertical, 5-ft-wide breccia and faultzone with pyrite, chalcopyrite and galena, 450-ft infrom portal. Fracture hosted in andesite (Schrader,1915, p. 264), USBM field crews intended to returnto site later and map, sample, but did not; no minemap made. Dump size: 29,000 ft 3, or about 1,500st. See fig. 18.Prospect pit excavated on fault (N. 78 ° E., 46 °NW.), rhyolite breccia, hematite. See fig. 17.Prospect pit excavated on fault (N. 68 ° E., 75 ° SE.),rhyolite, hematite. See fig. 17.Adit, sealed with boards; estimated 150 ft ofunderground workings from size of dump. Sample:agglomerate, hematite. See fig. 17.Adit, caved, estimated to conceal about 50 ft ofunderground workings, based on dump size. Sample:rhyolite, hematite veinlets. See fig. 17.PAl 10 Chip 4.0 ft Prospect pit; rhyolite porphyry, silicified. See fig, 17.B14IIIIIIIIIIIIIIIiIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPAll1PAl12PAl13PAl14PAl15PAl16PAl17PAll8PAl 19PA 120ChipChipChipChipChipSelectChipChipChipChip1.5 ft3.5 ft2.0 ft1.0 ft3.0 ftXX4.0 ft6.0 ft5.0 ft3.0 ftAdit PAl 11-114, excavated in Laramide rhyolite.Fault (N. 25 ° E., 45 ° SE.) at portal. Sample: gouge,hematite. See fig. 17.Adit PA111-114, driven on siliceous zone. Sample:siliceous rhyolite, hematite, gypsum. See fig. 17.Adit PAl11-114. Sample of same zone as PAl12;rhyolite breccia, gypsum. See fig. 17.Adit PAll 1-114. Sample of same zone as PAl12-113; rhyolite breccia, chalcanthite, malachite. Seefig. 17.Adit, trends N. 80 ° W. for 35 ft. Intersects fault (N.18 ° W., 27 ° NE.) at portal. Sample: highly alteredrhyolite, hematite, limonite, disseminated pyrite.Mine map not included in this report, but is in USBMfiles, Denver. Deterioration of the prospect adit backas of March 1990 makes the site unsafe for samplingrocks inside the working. See fig. 17.Prospect pit; altered andesite, appears to be a 30-ftthickmanto of alunite. See pl. 1.Prospect adit, 49-ft-long, trending S. 5 ° W.;volcaniclastic rock, abundant hematite. Nostructures visible. Sample from within adit or atportal, but sample location not noted by USBM fieldcrews. No mine map made. See fig. 15.Prospect pit; altered rhyolite porphyry, hematitestockwork, sparse malachite, alunite. Alteration zoneis 400-ft long, apparently trends towards sitesPAl19-121. See fig. 15.Prospect pit, 50-ft by 15-ft and 6-ft-deep; alteredrhyolite, hematite and limonite stockwork, alunite.Apparently in same alteration zone as PAl 18. Seefig. 15.Outcrop beside drill pad; altered rhyolite, hematiteand limonite stockwork. Zone trends N. 79 ° W., SW.82 ° and apparently is same zone as PAl 18-119. Seefig. 15.B15

Appendix B--(Patagonia Mountains Canelo Hills Unit)- contin.SampleNumber Type Length RemarksPA121PA122PA123PA124PA125PA126PA127PAl 28GrabChipChipChipChipSelectSelectSelectXX0.6 ft4.0 ft .4.0 ft3.0 ftXXXXXXOpen pit, 30 ftx 30 ftx 20 ft. Alteration zonetrends N. 55 ° E. Sample: altered rhyolite porphyry,hematite and limonite stockwork, a grab of recentslough from pit highwall. See fig. 15.Prospect adit driven in rhyolite, crosscuts fault (N.30 ° E., 15 ° NW.). Sample: gouge, chrysocolla,hematite. See fig. 15.Adit PAl 22-123; rhyolite, disseminated pyrite,chrysocolla. See fig. 15.Aztec group, adit PA124-126. Sample" rhyoliteporphyry, pyrite stockwork. See fig. 15" mine map,fig. 16.Aztec group, adit PA124-126. Sample fault (N.85 ° E., 70 ° NW.), altered rhyolite, limonite andhematite stockwork. See fig. 15 mine map, fig. 16.Aztec group, adit PAl 24-126; rhyolite, pyritestockwork. See fig. 15; mine map, fig. 16.Flooded adit. Sample: vein quartz, abundant pyritefrom dump. See fig. 3. Possibly part of Blue EagleMine.Shaft; about 500 ft of workings; vein quartz,abundant pyrite, unidentified black mineral. See fig.3. Possibly part of Blue Eagle Mine.PAl 29 Select XX Shaft PAl 28; quartz, pyrite.PAl30 Chip 2.5 ft Adit; 30-ft-long; fault strikes N. 300 W., dips 15 °NE., fractured rhyolite, gouge, hematite. Apparentlyclose to shaft PA128-129. See fig. 3.PAl 31 Chip 3.0 ftPA132 Select XXTrench; fault strikes N. 50 ° W., dips 80 ° SW.,hanging wall gouge, rhyolite breccia, disseminatedpyrite. Apparently close to shaft PAl 28-129, andadit PA130. See fig. 3.Flooded adit, dump washed away; agglomerate,hematite, disseminated pyrite. See fig. 3. Possiblypart of Blue Eagle Mine.B16IIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit}--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA133PA134PAl 35PA136PA137PA138PA139PAl40PAl41PA142PAl 43.SelectChipChipChipSelectSelectSelectSelectSelectSelectSelectXX2.0 ft4.0 ft3.0 ftXXXXXXXXXXXXXXShaft and adit, about 100 ft of underground workingsestimated from dump size. Fault strikes N. 45 ° W.,dips 75° SW., silicified and pyritiferous rock. Seefig. 3.35-ft-long adit; quartz vein strikes N. 30°-55 ° W.,dips 25 o NE., pyritiferous volcanic rock, quartz,pyrite. See fig. 3.Adit PA135-136 with winze, 55-ft in from portal;fracture zone strikes N. 75° W., dips vertical,breccia, pyrite, quartz. See fig. 3. No mine mapmade.PAl 35-136 adit and fracture zone; siliceous volcanicrock, gouge, breccia. See PA135 and fig. 3.Dump of adit PA135-136; quartz, pyrite, hematite.Dump has been washed down the gully. See fig. 3.Shaft; about 150 ft of workings; fault strikes N. 60 °W., dips 85 ° NE., quartz, pyrite, hematite. Dumpsize: 7,100 ft 3, or about 400 st. See fig. 3.Shaft; about 50 ft of workings; quartz, pyrite, galena,chalcopyriteo Fig. 3.Flux Mine glory hole; gossan, hematite, limonite,manganese oxide. See fig. 3; mine map, fig 41.Flux Mine; skarn outcrop; galena, pyrite, sphalerite.See fig. 3; mine map, fig 41.Flux Mine; ore bin; pyrite, quartz, galena, sphalerite.Fig. 3.World's Fair Mine; dump; quartz, chalcopyrite, pyrite,galena, sphalerite. Dump is 50,000 to 60,000 st.See fig. 3.PA144 Select XX World's Fair Mine; a second select sample from dumpPA143: quartz, disseminated pyrite. See fig. 3.PA145 Select XX World's Fair Mine; same dump as PA143-144.Siliceous volcanic rock, pyrite, epidote. See fig. 3.B17

Appendix B- (Patagonia Mountains-Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA146PA147PA 148PA149PAl50PA151SelectSelectSelectSelectSelectSelectXXXXXXXXXXXXCrosscut adit of the Buffalo group, trends S. 30 ° W.for 210 ft through andesite porphyry, then caved.Sample: high-grade with greatest sulfide content;andesite porphyry with sericitic alteration, quartz,fine and disseminated pyrite, lesser amounts ofhematite, limonitic material, barite. See fig. 44. Aditmay have been driven to intersect the second of thetwo veins mined at Lead Queen Mine; they are 600 ftapart (Schrader, 1915, p. 276).Flooded adit, likely part of the Lead Queen Mine.Sample: quartz, barite, andesite porphyry withabundant barite and quartz, from dump. Aditestimated to conceal 2,000 ft of undergroundworkings, based on dump size. See fig. 44. Aditmay have been driven to intersect the second of thetwo veins mined at Lead Queen Mine; they are 600 ftapart (Schrader, 1915, p. 276).Same adit dumpfrom the dump:PA146; fig. 44.as PA147. Asecond select samplepyrite with some quartz. SeeSame adit dump as PA147. A third select from thedump: andesite porphyry, feldspars altered toalunite; weathering indicates fine, disseminated pyritemust be present. See PA146; fig. 44.Lead Queen Mine, shaft PA150-153, more than 100-ft-deep. Sample: select, to check the composition ofbarite with minor galena, from the dump. Onethousandft of underground workings estimated,based on dump size. See fig. 44. Most likely is sunkon the same vein as adit PA154-159 of the LeadQueen Mine. This working was apparently 166-ftdeepand included two levels undergrounddevelopment as of 1915 (Schrader, 1915, p. 277).Lead Queen Mine, shaft PA150-153. A secondselect sample from the dump: the most pyriticmaterial; altered, pyritic andesite with minor bariteand chalcocite(?). See PA150; fig. 44.B18IIIIIIIIIIIIIIIiIII

IIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA152PA153PA154PA155PA156PA157PA158PA159PAl60PAl61PAl 62SelectSelectChipChipChipChipChipChipSelectSelectSelectXXXX5.0 ft3.5 ft6.0 ft2.5 ft2.0 ft3.0 ftXXXXXXLead Queen Mine, shaft PA150-153. A third selectsample from the dump: silicified country rock[apparently andesite], with quartz grains and somepyrite. See PA150; fig. 44.Lead Queen Mine, shaft PA150-153. A fourth selectsample from the dump: sericitized andesite porphyry,with abundant hematite. See PA150; fig. 44.Lead Queen Mine, adit PAl 54-159; andesiteporphyry, abundant hematite. See fig. 44.Lead Queen Mine, adit PAl 54-159; altered andesiteporphyry, abundant hematite. See fig. 44.Lead Queen Mine, adit PAl 54-159; andesiteporphyry, hematite. See fig. 44.Lead Queen Mine, adit PAl 54-159; altered andesiteporphyry, azurite, limonite, from mined zone. Seefig. 44.Lead Queen Mine, adit PAl 54-159; altered andesiteporphyry, hematite stringers, azurite from same zoneas PA157. See fig. 44.Lead Queen Mine, adit PAl 54-159; altered andesiteporphyry, hematite stringers, azurite from same Zoneas PA157. See fig. 44.Basin No. 1 prospect, caved adit (was 188-ft-long in1915); driven in altered andesite porphyry withhematite, pyrite. Low per cent total sulfides. Selectfrom high-grade pile. See fig. 44.Basin No.1 prospect, same high-grade pile as PA160;a second select sample: hematite-rich replacement ofandesite, minor limonitic material. See PA160; fig.44.Basin No. 1 prospect, caved shaft (locationapproximated on fig. 44) sunk on 5-ft to 6-ft-wide,hematite-stained fault (N. 10 ° E., 15 o SE.) throughandesite porphyry; abundant pyrite. Site was plottedby author at location of prospect shown on modernpublished maps of the Harshaw 7.5-minutequadrangle.B19

Appendix B (Patagonia Mountains-Canelo Hills Uni[) -contin.SampleNumber Type Length RemarksPA163PA164PAl 65PA166PA167PA168PA169PAl70ChipChipSelectChipSelectSelectSelectChip2.0 ft3.0 ftXX0.8 ftXXXXXX2.0 ftGreat Silver Mine, sample of mined zone fromoutcrop near stope to surface; andesite porphyry,abundant hematite, manganese oxide, minor barite.See PA166 for probable orientation of mined zone.Haulage was from a 50-ft-long adit into the openstope (Schrader, 1915, p. 275). No dump or aditnoted; probably caved adit and dump washed awayby stream erosion. See fig. 44.Great Silver Mine, sample of mined zone fromoutcrop near stopeto surface: andesite porphyry,with heavy argillic alteration, limonite stringers. SeePA166 for probable orientation of mined zone. Seefig. 44.Great Silver Mine, high-grade pile by open stope;altered andesite porphyry, pyrite, galena, barite,siderite. See fig. 44.Great Silver Mine, sample of mined fault zone (N. 45 °W., NE. 70 ° ) from outcrop near stope to surface:gouge, hematite, limonite, barite, manganese oxide.See fig. 44.Red Rock(?) prospect, caved adit; altered andesite,abundant hematite, calcite from dump. Estimated toconceal 300 ft of underground excavations, based ondump size. See fig. 44.Red Rock(?) prospect, same dump as PA167. Highgradeof copper-rich rock: andesite porphyry, azurite,chrysocolla. See PA167; fig. 44.Caved adit of Chief Mine group in Triassic- orJurassic-age volcanics (Simons, 1974, map);estimated 150 ft of underground workings, based ondump size. Sample: rhyolite, quartz, disseminatedpyrite, from dump. See fig. 3.Prospect pit of Chief Mine group in 8-ft-wide(minimum) altered zone (N. 30 ° E., vertical),characterized by bleaching and limonitic stain. Extentof zone not reported. Host rock is 700-ft-longlimestone relict in Triassic- or Jurassic-age volcanics(Simons, 1974, map). Sample: rhyolite, hematite.See fig. 3.B20IIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA171PA172PA173PA174PA175PA176PA177PA178PA179PAl80PA181ChipChipChipChipChipChipChipChipChipChipChip3.0 ft4.0 ft2.5 ft2.0 ft3.0 ft2.0 ft3.0 ft1.0 ft3.0 ft1.0 ft3.5 ftAdit PA171-188 (part of Chief Mine group), driven inTriassic- to Jurassic-age volcanics (Simons, 1974,map). Sample: altered rhyolite porphyry, abundanthematite and limonite. See fig. 3; mine map, fig. 9.Adit PAl 71-188; fractured rhyolite, hematite,limonite. See PA171; fig. 3; mine map, fig. 9.Adit PAl 71-188; fractured and silicified zone,limonite, disseminated pyrite. See PA171; fig. 3;mine map, fig. 9.Adit PAl 71-188; fault zone, fractured rhyolite,pyrite, gouge, hematite. See PA171; fig. 3; minemap, fig. 9.Adit PAl 71-188; fault zone, fractured and silicifiedrhyolite porphyry, hematite. See PA171; fig. 3; minemap, fig. 9.Adit PAl 71-188; shear zone, disseminated pyrite,abundant hematite. See PA171; fig. 3; mine map,fig. 9.Adit PA171-188; breccia pipe, pyritiferous clasts.This breccia pipe (samples PA177-183) apparentlydoes not crop out at the topographic surface. Thereare, however, several breccia pipes in the immediatearea. See PA171; fig. 3; mine map, fig. 9.Adit PA171-188. Fault zone in breccia pipe 177-183. Sample: gouge, hematite, limonite. SeePA171, 177; fig. 3; mine map, fig. 9.Adit PA171-188. Siliceous zone in breccia pipePA177-183. Sample: fractured rhyolite, abundanthematite and limonite. See PA171, 177; fig. 3; minemap, fig. 9.Adit PA171-188. Fault in breccia pipe PA177-183.Sample: gouge, hematite. See PA171, 177; fig. 3;mine map, fig. 9.Adit PA171-188. Breccia pipe PA177-183. Sample:clasts, round, black, pyritiferous; pyritiferous matrixwith selenite. See PA171, 177; fig. 3; mine map,fig. 9.B21

Appendix B-(Patagonia Mountains Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA182PA183ChipChip0.8 ft2.0 ftAdit PA171-188. Fault in breccia pipe 177-183.Sample: gouge, selenite, pyrite. See PA171, 177;fig. 3; mine map, fig. 9.Adit PA171-188. Breccia pipe PA177-183. Sample:silicified and pyritized breccia pipe with quartz clasts.See PA171, 177; fig. 3; mine map, fig. 9.PA184 Chip 3.0 ft Adit PA171-188; silicified rhyolite, disseminatedpyrite. See PA171; fig. 3; mine map, fig. 9.PA185 Chip 3.0 ft Adit PA171-188; silicified rhyolite, disseminatedpyrite. See PA171; fig. 3; mine map, fig. 9.PA186 Chip 2.0 ft Adit PA171-188; fractured rhyolite, quartz, selenite.See PA171; fig. 3; mine map, fig. 9.PA187 Chip 2.0 ft Adit PA171-188; rhyolite porphyry, hematitestringers. SeePA171; fig. 3; mine map, fig. 9.PA188 Chip 4.0 ft Adit PA171-188; rhyolite porphyry, disseminatedpyrite, quartz. SeePA171; fig. 3; mine map, fig. 9.PAl 89 Select XXPAl90PA191PA192SelectSelectSelectXXXXXXChief Mine group, Kemp shaft, excavated in shearzone (N. 10 ° W., vertical) through a 700-ft-longlimestone relict in Triassic- or Jurassic-age volcanics(Simons, 1974, map). Shaft probably opened by1915, was about 50-ft-deep then (Schrader, 1915,p. 251); about 150-ft-deep in 1990. Sample:quartz, pyrite, hematite, from dump. See fig. 3.Chief Mine group, Kemp shaft (PAl 89); alteredrhyolite, abundant hematite, quartz, breccia, fromdump. See PA189; fig. 3.Chief Mine group, Kemp shaft (PA189); skarn,breccia, from dump. See PA189; fig. 3.Chief Mine caved shaft sunk on metallized zone(?) (N.60 ° E., vertical) in Triassic- to Jurassic-age volcanicrocks (Simons, 1974, map). Sample: galena, pyrite,sphalerite, from 54,000 ft 3 dump (about 2,800 st).See fig. 3. Either Main shaft (230-ft-deep duringmining) or Morrison shaft (130-ft-deep during mining)(Kartchner, 1944, p. 91). SeePA193.B22IIIIIIIIIIIIIIIIIII

. '~¸ ,Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIiIIIIIIIIIIIPA193PA194PA195PA196PA197PA198PA199PA200PA201PA202PA203SelectSelectSelectChipChipChipChipChipChipChipChipXXXXXX1.0 ft0.8 ft2.5 ft3.0 ft1.0 ft2.0 ft1.5 ft1.0 ftChief Mine, caved shaft, apparently 180 ft on N. 35 °W. bearing from shaft PA192, and 40-ft in elevationbelow shaft PA192; may conceal about 750 ft ofworkings, based on dump size. Sample: quartz,chalcocite, pyrite, tetrahedrite, tennantite, fromdump. See fig. 3. Either Main shaft or Morrisonshaft; see PA192.Chief Mine adit, caved in 1994, excavated on samestructure as PA192. Sample: quartz, pyrite,marcasite, from dump. See fig. 3.PA192 mine dump; quartz, galena, pyrite. SeePA192; fig. 3.Panama adit; fault zone; fractured rhyolite porphyry,gouge, disseminated pyrite, hematite, azurite. Seefig. 3; mine map, fig. 65. Host rocks are Tertiary- orCretaceous-age volcanics (Simons, 1974, map).Panama adit; siliceous zone, abundant pyrite, alteredrhyolite porphyry. See PA196; fig. 3; mine map, fig.65.Panama adit; altered rhyolite porphyry. See PA196;fig. 3; mine map, fig. 65.Panama adit, fault zone; gouge, hematite, limonite,azurite. Extent of fault beyond adit not recorded.See PA196; fig. 3; mine map, fig. 65.Panama adit, same fault as PAl 99; gouge, hematite,limonite. See PA196; fig. 3; mine map, fig. 65.Panama adit, fault zone; gouge, hematite, limonite.Extent of fault beyond adit not recorded. SeePA196; fig. 3; mine map, fig. 65.Panama adit, same fault zone as PA201; gouge,hematite, limonite. See PA196; fig. 3; mine map, fig.65.Panama adit, same fault zone as PA201-202; gouge,limonite, rhyolite breccia. See PA196; fig. 3; minemap, fig. 65.B23

Appendix B--(Patagonia Mountains Cane[o Hills Unit)- contm.SampleNumber Type Length RemarksPA204PA205ChipChip3.0 ft2.0 ftPanama adit; altered rhyolite porphyry, disseminatedpyrite. See PA196; fig. 3; mine map, fig. 65.Panama adit, fault; altered and siliceous rhyolite,disseminated pyrite, pyrite stringers. See PA196; fig.3; mine map, fig. 65.PA206 Chip 1.0 ft Panama adit, fault; gouge, hematite. See PA196;fig.3; mine map, fig. 65.PA207 Chip 3.0 ft Panama adit; altered rhyolite, stringers and blebs ofpyrite. SeePA196; fig. 3; mine map, fig. 65.PA208 Chip 4.5 ft Panama adit; altered rhyolite porphyry, disseminatedpyrite. See PA196; fig. 3; mine map, fig. 65.PA209 Chip 6.0 ft Bulldozer cut exposes fault (N. 65 ° E., 17 ° SE.) inaltered rhyolite with hematite. See fig. 3. Hostrocks are Tertiary- or Cretaceous-age volcanics(Simons, 1974, map).PA210 Select XX Bulldozer cut PA209; rhyolite, quartz, disseminatedpyrite. See PA209; fig. 3.PA211 Chip 4.0 ftPA21 2PA213PA21 4PA21 5ChipChipChipChip5.0 ft4.0 ft4.0 ft5.0 ftAdit PA211-223; siliceous rhyolite, breccia pipe,sparse disseminated pyrite. See fig. 3; mine map,fig. 7. Host rocks are Tertiary- or Cretaceous-agevolcanics; a small breccia pipe, mapped by Simons(1974, map).IIIIIIIB24 !Adit PA211-223; breccia pipe, rhyolite, hematite,disseminated pyrite. See PA211; fig. 3; mine map,fig. 7.Adit PA211-223; breccia pipe, rhyolite, hematite,disseminated pyrite. See PA211; fig. 3; mine map,fig. 7.Adit PA211-223; breccia pipe, rhyolite porphyry,abundant clay and hematite. See PA211; fig. 3;mine map, fig. 7.Adit PA211-223; andesite, breccia pipe, abundantdisseminated pyrite, chalcanthite. See PA211; fig. 3;mine map, fig. 7.IIIIIIIIIIIIII

I'¢" IIIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA216PA217PA218PA219PA220PA221PA222PA223PA224PA225PA226PA227ChipChipChipChipChipChipChipChipChipSelectChipChip5.0 ft5.0 ft4.0 ft4.0 ft5.0 ft4.0 ft0.5 ft6.0 ft12.0 ftXX5.0 ft4.0 ftAdit PA211-223; andesite, breccia pipe, abundantdisseminated pyrite, chalcanthite. See PA211; fig. 3;mine map, fig. 7.Adit PA211-223; andesite, breccia pipe, abundantdisseminated pyrite, chalcanthite. See PA211; fig. 3;mine map, fig. 7.Adit PA211-223; rhyolite, breccia pipe, disseminatedpyrite. See PA211; fig. 3; mine map, fig. 7.Adit PA211-223; rhyolite porphyry, hematite, clay.See PA211; fig. 3; mine map, fig. 7.Adit PA211-223; rhyolite, breccia pipe, disseminatedpyrite, hematite. See PA211; fig. 3; mine map, fig.7.Adit PA211-223; fracture zone, rhyolite, abundantpyrite, chalcanthite, hematite. See PA211 ; fig. 3;mine map, fig. 7.Adit PA211-223; siliceous hematite zone,chalcanthite. See PA211; fig. 3; mine map, fig. 7.Adit PA211-223; breccia pipe, rhyolite, disseminatedpyrite, hematite stockwork, chalcanthite. SeePA211; fig. 3; mine map, fig. 7.Outcrop; aphanitic volcanic rock, disseminated pyrite,malachite stains. See fig. 3. Host rocks are TriassicageMt. Wrightson Formation (Simons, 1974, map).Outcrop; silicious volcanic rock, disseminated, pyrite.See fig. 3. Host rocks are probably part of a silicifiedTertiary- or Cretaceous-age volcanic rock unitmapped by Simons (1974, map).Sunnyside Mine; rhyolite breccia, tuff, hematite. Seefig. 3; mine map, fig. 12. Host rocks are silicifiedpart of Tertiary- or Cretaceous-age volcanic rock unitmapped by Simons (1974, map).Sunnyside Mine; fault, rhyolite breccia, hematite,chalcanthite. See PA226; fig. 3; mine map, fig. 1 2.B25

Appendix B- (Patagonia Mountains-Canelo Hills Unit) -contin.SampleNumber Type Length RemarksPA228PA229PA230PA231PA232PA233PA234PA235PA236PA237PA238PA239PA240PA241ChipChipChipChipChipChipChipChipChipChipChipChipChipChip5.0 ft4.0 ft3.0 ft2.0 ft5.0 ft4.0 ft0.8 ft5.0 ft5.0 ft5.0 ft3.0 ft4.0 ft5.0 ft5.0 ftSunnyside Mine; porphyritic rhyolite breccia,hematite, chalcanthite. See PA226; fig. 3; minemap, fig. 12.Sunnyside Mine; porphyritic rhyolite breccia,hematite, rare manganese oxide. See PA226; fig. 3;mine map, fig. 12.Sunnyside Mine; fault, rhyolite breccia, gouge,hematite. See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; fault, abundant hematite, limonite,gouge, hematite stringers, rare chalcanthite. SeePA226; fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, disseminated pyrite,rarechalcanthite. See PA226; fig. 3; mine map, fig.12.Sunnyside Mine; rhyolite breccia, rare chalcanthite.See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; fault, gouge, hematite, limonite.See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, abundant clay andhematite. See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, hematite,chalcanthite along fractures. See PA226; fig. 3;mine map, fig. 12.Sunnyside Mine; rhyolite breccia, hematite. SeePA226; fig. 3; mine map, fig. 12.Sunnyside Mine; hanging wall of fault, rhyolitebreccia, hematite, manganese oxide. See PA226;fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, hematite,chalcanthite. See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, hematite,chalcanthite. See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; fault; rhyolite breccia, abundanthematite, limonite, manganese oxide. See PA226;fig. 3; mine map, fig. 12.B26PIIIiIIIIIIIIIiiIiIi

i:1IIIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA242PA243PA244PA245PA246PA247PA248PA249PA250PA251PA252PA253ChipChipChipChipChipChipChipChipChipChipChipChip8.0 ft5.0 ft4.0 ft5.0 ft5.0 ft5.0 ft5.0 ft5.0 ft5.0 ft5.0 ft5.0 ft4.0 ftSunnyside Mine; fault; gouge, clay, rhyolite breccia,hematite stringers. See PA226; fig. 3; mine map,fig. 12.Sunnyside Mine; rhyolite breccia. See PA226; fig. 3;mine map, fig. 12.Sunnyside Mine; fault; rhyolite breccia, hematite,gouge, clay, hematite stringers. See PA226; fig. 3;mine map, fig. 12.Sunnyside Mine; rhyolite breccia, abundant hematite,limonite, rare chalcanthite. See PA226; fig. 3; minemap, fig. 12.Sunnyside Mine; rhyolite breccia, abundantchalcanthite and limonite, some silicification. SeePA226; fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, hematite, limonite,abundant chalcanthite, disseminated pyrite, somesilicification. See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; silicified rhyolite breccia, fault,abundant hematite, disseminated pyrite. See PA226;fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, disseminated pyrite,hematite. See PA226; fig. 3; mine map, fig. 12.Sunnyside Mine; rhyolite breccia, abundantchalcanthite and limonite, hematite stringers.PA226; fig. 3; mine map, fig. 12.SeeSunnyside Mine; rhyolite breccia, abundant hematiteand chalcanthite. See PA226; fig. 3; mine map, fig.12.Sunnyside Mine; rhyolite breccia, sparsedisseminated pyrite. See PA226; fig. 3; mine map,fig. 12.Near inclined shaft above Sunnyside Mine adit; fault,rhyolite breccia, malachite stains. See PA226; fig. 3;mine map, fig. 12.B27

Appendix B (Patagonia Mountains Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA254PA255PA256PA257PA258PA259PA260PA261PA262PA263SelectChipSelectChipChipChipSelectSelectChipChipXX4.0 ftXX4.0 ft4.0 ft15.0 ftXXXX60.0 ft6.0 ftNear inclined shaft above Sunnyside Mine adit;silicified rhyolite breccia, disseminated pyrite,malachite stains. See PA226; fig. 3; mine map, fig.12.Inclined shaft above Sunnyside Mine; fault, silicifiedrhyolite breccia, abundant hematite, sparsemanganese oxide. Dump size: 54,000 ft 3, or about2,800 st. Possibly is same fault as PA253. SeePA226; fig. 3; mine map, fig. 12.Outcrop of 50-ft-wide quartz vein (N. 20 ° W., dipnot recorded); massive quartz, disseminated pyrite.Host rock is Triassic- or Jurassic-age monzonite(?)porphyry (Simons, 1974, map). See fig 3.Prospect adit, 43-ft-long (not mapped by USBM),driven in volcanics of Mt. Wrightson Formation(Simons, 1974, map). Sample: welded tuff,siliceous and glassy. See fig. 3.Prospect adit; tuff, abundant hematite veinlets,silicious. Apparently same site in adit as PA257.See fig. 3.Bulldozer cut, exposes shear zone (N. 60 ° W., 80 °NE.) through Mt. Wrightson Formation rocks (Simons,1974, map). Shear extent not recorded. Sample:gouge, silicified rhyolite, abundant hematite. See fig.3.Bulldozer cut exposes altered rhyolite porphyry,abundant hematite. Same host rock as PA259. Seefig. 3.Prospect adit, about 100-ft-long (not mapped byUSBM because it is infested with fleas). Sample:altered pyritized rhyolite, abundant disseminatedpyrite. No dump. See fig. 3.Bulldozer cut, lower level. Sample:rhyolite porphyry zone trends west.recorded. See fig. 3.pyritiferousZone extent notSame bulldozer cut as PA262, upper level; alteredzone on north side of above pyritiferous zone,disseminated hematite. See fig. 3.B28IIIIIIIIIIIIIIIIIII

!~i!-IiIIIiIIIIIIIIIIiAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA264PA265PA266PA267PA268PA269PA270PA271PA272PA273PA274PA275ChipChipChipChipChipChipChipChipChipChipChipChip1.0 ft3.0 ft3.0 ft0.8 ft3.0 ft3.0 ft3.5 ft2.0 ft4.0 ft3.0 ft3.0 ft2.0 ftProspect adit PA264-271, driven on hematite vein inrhyolite porphyry. Sample of vein. See fig. 3; minemap, fig. 13.Prospect adit PA264-271- rhyolite porphyry,abundant hematite stringers, disseminated hematite,siliceous. See fig. 3; mine map, fig. 13.Prospect adit PA264-271, rhyolite porphyry,disseminated pyrite, chalcanthite, gypsum, rarechalcopyrite. See fig. 3; mine map, fig. 13.Prospect adit PA264-271; hematite vein, limonite.See fig. 3; mine map, fig. 13.Prospect adit PA264-271; rhyolite porphyry,disseminated pyrite, hematite stringers, chalcanthite,gypsum. See fig. 3; mine map, fig. 13.Prospect adit PA264-271; rhyolite porphyry,abundant hematite stringers, disseminated hematite.See fig. 3; mine map, fig. 13.Prospect adit PA264-271; siliceous rhyolite porphyry,disseminated pyrite, hematite stringers, chalcanthite,gypsum. See fig. 3; mine map, fig. 13.Prospect adit PA264-271; hematite vein, gouge. Seefig. 3; mine map, fig. 13.Bulldozer cut in a Triassic- to Jurassic-agemonzonite(?) porphyry unit mapped by Simons(1974, map). Sample: quartz monzonite, hematite,disseminated pyrite. See fig. 3.Thunder prospect adit PA273-285; siliceous aphaniticvolcanic rock, selenite. Triassic- or Jurassic-age hostrock (Simons, 1974, map). See fig. 3; mine map, fig.13.Thunder prospect adit PA273-285; siliceous aphaniticvolcanic rock, hematite, rare chalcanthite. SeePA273; fig. 3; mine map, fig. 13.Thunder prospect adit PA273-285; 1.5 ft of siliceousrhyolite with chalcanthite; 0.5 ft of siliceous rhyolitewith hematite. See PA273; fig. 3; mine map, fig. 13.B29

Appendix B- (Patagonia Mountains-Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA276PA277PA278PA279PA280PA281PA282PA283PA284PA285PA286ChipChipChipChipChipChipChipChipChipChipChip4.0 ft3.0 ft2.0 ft4.0 ft4.0 ft4.0 ft4.0 ft5.0 ft3.0 ft3.0 ft8.0 ftThunder prospect adit PA273-285; siliceous rhyolite,limonite. See PA273; fig. 3; mine map, fig. 13.Thunder prospect adit PA273-285; siliceous rhyolite,chalcanthite, selenite. See PA273; fig. 3; mine map,fig. 13.Thunder prospect adit PA273-285; stringers ofchalcopyritein siliceous rhyolite. See PA273; fig. 3;mine map, fig. 13.Thunder prospect adit PA273-285; siliceous rhyolite,chalcanthite, selenite. See PA273; fig. 3 mine map,fig. 13.Thunder prospect adit PA273-285; siliceous rhyolite,chalcanthite, selenite. See PA273; fig. 3; mine map,fig. 13.Thunder prospect adit PA273-285; siliceous rhyolite,chalcanthite, selenite. See PA273; fig. 3; mine map,fig. 13.Thunder prospect adit PA273-285; altered rhyoliteporphyry, hematite, limonite, chalcanthite, selenite.See PA273; fig. 3; mine map, fig. 13.Thunder prospect adit PA273-285; altered rhyoliteporphyry, hematite, limonite, chalcanthite, selenite.See PA273; fig. 3; mine map, fig. 13.Thunder prospect adit PA273-285; siliceous rhyolite,disseminated pyrite. See PA273; fig. 3; mine map,fig. 13.Thunder prospect adit PA273-285; siliceous rhyolite,disseminated pyrite. See PA273; fig. 3; mine map,fig. 13.Outcrop; reportedly a 300-ft-wide altered zone insiliceous rhyolite with disseminated hematite (J. R.Thompson, USBM, written commun., 1993). Hostrocks are Triassic- or Jurassic-age (Simons, 1974,map). See fig. 3.B30IIIIIIIIIIIIIIIIIII

;"' ~i ~¸i IIIIIIIIIIIIIIIIlAppendix B--{Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA287PA288PA289PA290PA291PA292PA293PA294PA295ChipChipChipChipChipChipChipChipSelect10 ft12 ft2.5 ft2.5 ft3.5 ft0.9 ft0.9 ft2.5 ftXXOutcrop, same area as PA286; siliceous zone (N. 35°E., dip not recorded) in fractured rhyolite withdisseminated hematite. See PA286; fig. 3.Outcrop, same area as PA286-287; siliceous rhyolite,abundant hematite. See PA286; fig. 3.Adit PA289-291, possibly part of the Humbolt Mineworkings. Altered zone in Cretaceous- or Tertiaryagevolcanics (Simons, 1974, map). Sample:rhyolite breccia (clasts have disseminated pyrite),fault gouge, hematite. See fig. 3; mine map, fig. 45.Adit PA289-291; fault gouge, hematite, limonite,rhyolite breccia, quartz, malachite stains,disseminated pyrite. See PA289; fig. 3; mine map,fig. 45.Adit PA289-291; fault gouge, rhyolite porphyry,rhyolite breccia (siliceous and pyritiferous clasts)disseminated pyrite, hematite. See PA289; fig. 3;mine map, fig. 45.Adit PA292-293; fault gouge, abundant hematite,fractured rhyolite porphyry, disseminated pyrite.Probably same zone sampled in adit PA289-291;same host rocks. See PA289; fig. 3; mine map, fig.45.Adit PA292-293; fault gouge, disseminated pyrite,malachite stains. See PA289; fig. 3; mine map, fig.45.Humbolt Mine area, adit, trends S. 80 ° W. for 35-ft,then caved. Sample: fractured diorite, disseminatedpyrite, hematite. See fig. 3. Mine map in USBMfiles, Denver, CO, not included in this report.Humbolt Mine area, adit PA295-298, excavated insame host rock as the other Humbolt Mine workings.Sample: vein quartz, abundant pyrite, sphalerite, raregalena, from dump. Appears to be on the mainHumbolt Mine vein, according to mapping by Simons(1974, map). See fig. 3; mine map, fig. 45.B31

Appendix B--(Patagonia Mountains Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA296PA297PA298PA299PA300PA301PA302PA303PA304PA305ChipChipChipSelectSelectChipChipChipChipChip2.0 ft2.0 ft3.0 ftXXXX3.0 ft1.0 ft1.5 ft3.0 ft3.0 ftAdit PA295-298" fault gouge, altered rhyolite,disseminated pyrite, hematite, quartz. See PA295;fig. 3; mine map, fig. 45).Adit PA295-298; silicified rhyolite, disseminatedpyrite, rare malachite. See PA295; fig. 3; mine map,fig. 45).Adit PA295-298; fault gouge, altered rhyolite,disseminated pyrite, breccia, hematite, quartz.PA295; fig. 3; mine map, fig. 45.SeeHumboit Mine, shaft and adit, flooded and caved in1990. Sample: silicified rhyolite porphyry,disseminated pyrite, from dump. Combined dump ofthe workings: 4,300 ft 3, or about 230 st (theworkings have apparently caved and slumpedtogether). See fig. 3. Unsampled shaftapproximately 400-ft due E. is largest working, with71,000 ft 3, or about 3,700 st.Humbolt Mine, PA299 workings; a second selectsample from the dump: rhyolite breccia, abundanthematite. See fig. 3.Humbolt Mine, adit PA301-305, excavated in samehost rock as other Humbolt Mine workings. Sample:fault gouge, fractured rhyolite porphyry, malachite,disseminated pyrite, hematite. See fig. 3; mine map,fig. 45. This structure is S. of, and apparentlyparallel to the main Humbolt Mine structure.Humbolt Mine, adit PA301-305; fault gouge,hematite, limonite, malachite. See PA301; fig. 3;mine map, fig. 45.Humbolt Mine, adit PA301-305; intersecting faults,gouge, disseminated pyrite, limonite, malachite. SeePA301; fig. 3; mine map, fig. 45.Humbolt Mine, adit PA301-305; rhyolite breccia,disseminated pyrite. See PA301; fig. 3; mine map,fig. 45.Humbolt Mine, adit PA301-305; fault gouge, rhyoliteporphyry, disseminated pyrite, hematite. See PA301;fig. 3; mine map, fig. 45.B32IIIIIIIIIIIIIIIIIII

i!!Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA306PA307PA308PA309PA310PA311PA312PA313PA314PA315SelectSelectChipSelectSelectSelectChipChipChipChipXXXX5.0 ftXXXXXX2.5 ft2.0 ft1.0 ft5.0 ftUnnamed prospect: flooded shaft, estimated 30-ftdeep,based on dump size. Sample: rhyoliteporphyry breccia, disseminated pyrite, from dump.Dump size 300 ft 3 (about 15 st). Host rocks aresame volcanic series as the Humbolt Mine (Simons,1974, map). See fig. 3.Unnamed prospect: flooded adit, trends N. 15 ° E. insame volcanic series as the Humbolt Mine. Sample:altered andesite, rhyolite breccia, disseminated pyrite,from dump (100 ft 3, or about 5 st). See fig. 3.Prospect pit, exposes fault (N. 65 ° W., vertical) insame volcanic series as the Humbolt Mine. Sample:andesite, fault gouge, pyrite, epidote, hematite. Seefig. 3.Prospect adit, caved. Sample: andesite,disseminated pyrite, epidote, from dump. See fig. 3.Unnamed prospect, caved shaft which may conceal100 ft of underground workings, based on dumpsize. Sample: rhyolite breccia, hematite, pyrite, from7,100 ft 3 dump (about 400 st). Excavated inCretaceous-age volcanics (Simons, 1974, map). Seefig. 3.Same shaft as PA310; silicified rhyolite with minorquartz blasts; disseminated pyrite, from dump. Seefig. 3.Unnamed prospect adit PA312-317, excavated inquartztite, probably of the Bisbee Group (Simons,1974, map). Sample: fault gouge, quartzite,hematite, manganese oxide. Dump size: 3,600 ft 3,or about 200 st. See fig. 3; mine map, fig. 40.Prospect adit PA31 2-317; quartzite, disseminatedpyrite. See PA312; fig. 3; mine map, fig. 40.Prospect adit PA312-317; fault gouge, hematite,limonite, manganese oxide. See fig. 3; mine map,fig. 40.Prospect adit PA312-317; fault gouge, nodularquartzite, hematite. See fig. 3; mine map, fig. 40.B33

Appendix B (Patagonia Mountains-Canelo Hills Unit) -conlm.SampleNumber Type Length RemarksPA316PA317PA318PA319PA320PA321PA322PA323PA324ChipChipChipSelectSelectSelectSelectChipChip2.5 ft5.0 ft1.5 ftXXXXXXXX4.0 ft8.0 ftProspect adit PA312-317; fault gouge, nodularquartzite, hematite. See fig. 3; mine map, fig. 40.Prospect adit PA31 2-317; fractured quartzite,hematite, manganese oxide. See fig. 3; mine map,fig. 40.Blue Nose Mine, caved adit PA318-320, near centerof property; highly-fractured quartzite at portal.Relation to main mined structures not determined.See fig. 3. Another caved adit is about 200 ft NE.;no data was recorded for that site.Blue Nose Mine, adit PA318-320; quartzite, pyrite,psilomelane, from dump. Dump contains 14,000 ft 3of rock (about 700 st). See fig. 3.Blue Nose Mine, adit PA318-320; a second selectsample from dump PA319: vein quartz, abundanthematite, limonite. Of rock that is available, this isprobably most representative of the mined zone. Seefig. 3.Blue Nose Mine, shaft PA321-322, about 150 ft deepin 1990; was apparently as deep as 200-ft in 1915(Schrader, 1915, p. 279). Sample: quartzite,abundant galena, pyrite, sphalerite, from segregatedhigh-grade pile (size unknown). Relation to mainmined structures not determined. See fig. 3-Blue Nose Mine, shaft PA321-322; quartzite,psilomelane, disseminated pyrite from dump of shaft(and possibly adit that is 250 ft to the NE. also).Overall dump contains 250,000 ft 3 of rock (about13,000 st). See fig. 3.Blue Nose Mine tailings, which contain 26,000 ft 3(about 2,000 st) in total. Described as "sand fromlower section" by USBM field crews. Probably froma flotation mill. See fig. 3.Blue Nose Mine tailings, same tails as PA323;described as "sand from upper section" by USBMfield crews. See fig. 3.B34IIIIIIIIIIIIIIIIIII

IAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA325PA326PA327PA328PA32gPA330PA331PA332PA333PA334ChipChipSelectChipSelectSelectSelectSelectSelectSelect7.0 ft3.0 ftXX2.5 ftXXXXXXXXXXXXProspect pit; limestone/fractured felsite contactstrikes N. 5 ° E., dips 70 ° NW., abundant hematite,disseminated pyrite. Extent of zone, pit dimensions,not recorded. See fig. 3.Augusta Mine adit, crosscuts, then drifts on fault (N.75 ° E., 80 ° SE.). Sample: fault gouge, galena,sphalerite, chalcopyrite. Sulfides are on only 4-in.- to6-in.-wide footwall side of fault. See fig. 3, minemap, fig. 43.Augusta Mine, same material as PA326, from aditdump. See fig. 3; mine map, fig. 43.Endless Chain Mine, tailings pile (11,000 ft 3, or about550 st) by caved shaft. Sample: section throughtailings; highly pyritic; oxidized layers, gray clay. Theshaft is an inclined working, sunk prior to 1915(Schrader, 1915, po 308). See fig. 3. Acidic watersleaching from the pile dissolved aluminum trash atthe site.Endless Chain Mine, same site as PA328. Black,aphanitic, intrusive rock, possibly a sill; containsdisseminated pyrite. See fig. 3.Endless Chain Mine, caved adit. Sample: vuggyquartz, galena, pyrite, hematite, from 1,200 ft 3 dump(about 60 st). See fig. 3.Endless Chain Mine, caved adit; vuggy quartz,abundant pyrite from 320,000 ft 3 dump (about17,000 st). A high-grade sample. See fig. 3.Morning Glory Mine, caved shaft and inclined shaftconceal about 750-ft of workings, based on dumpsize. Sample: vuggy quartz, abundant pyrite, fromdump. See fig. 3.Morning Glory Mine; apparently a second selectsample from shaft dumps: specular hematite. Seefig. 3.Morning Glory Mine; apparently a third select samplefrom the shaft dumps: sphalerite, hematite, quartz,rare chalcopyrite. See fig. 3.B35

Appendix B -(Palagonia Mounlains Canelo Hills Unil) contin.SampleNumber Type Length RemarksPA335PA336PA337PA338PA339PA340PA341PA342PA343SelectSelectSelectSelectChipSelectChipSelectSelectXXXXXXXX1.4 ftXX2.5 ftXXXXAlta Mine, mine and dump are reclaimed; quartz,abundant galena, sphalerite, pyrite, hematite,apparently from remains of the dump. See fig. 34.Alta Mine; apparently a second select sample fromthe dump: brecciated rhyolite, limonite, manganeseoxide. See fig. 34.Alta Mine; apparently a third select sample from thedump: altered rhyolite, chrysocolla, manganeseoxide, hematite, azurite, malachite. See fig. 34.Alta Mine; apparently a fourth select sample from thedump: altered rhyolite, quartz, disseminated pyrite.See fig. 34.Salvador Mine area, caved adit, apparently 100-ftlongbased on dump size; apparently intersectsmanganiferous vein (N. 40 ° E., 65 ° SE.), limonite,altered rhyolite. See fig. 34.Black Eagle Mine, shaft, about 60-ft-deep;psilomelane, quartz, calcite. See fig. 34. Site of1953 Mn production (Farnham and others, 1961, p,1 69-170).Black Eagle Mine, inclined shaft, open to 80-ft depthin 1990; manganiferous zone (N. 70 ° E., 45 ° NW.),psilomelane, quartz (limestone on hanging wall andquartzite conglomerate on footwall). See fig. 34.This zone is main mined zone and continues on strikefor 100 ft; shaft originally sunk to 180-ft depth(Farnham and others, 1961, p. 169) and was inclinedto the E.Black Eagle Mine, caved adit driven on manganiferouszone (E. strike, dips 50 ° N.). Sample: psilomelane,calcite, hematite from dump. See fig. 34.Bender Mine, caved adit; limestone breccia, chert,psilomelane, hematite, quartz from dump. See fig.34; mine map, fig. 37.B36IIIIIIIIIIIIIIIiIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIPA344PA345PA346PA347PA348PA349PA350PA351PA352PA353SelectSelectChipChipChipChipChipSelectSelectSelectXXXX3.0 ft2.0 ft3.5 ft0.5 ft3.5 ftXXXXXXBender Mine, surface workings that connect to, andin part are caved into, underground workings at thesouthern part of the deposit. Sample: quartz,psilomelane, hematite from dump. See fig. 34; minemap, fig. 37.Shaft, about 80-ft-deep; fractured quartz monzonitezone trends east-west, dips 80 ° S., vuggy quartz,abundant pyrite.Mary Cane prospect adit, altered rhyolite porphyry.See fig. 60; mine map, fig. 46.Mary Cane prospect adit; fault breccia, sericite,hematite. See fig. 60, mine map; fig. 46.Mary Cane prospect adit; altered rhyolite, sericite,hematite veinlets. See fig. 60; mine map, fig. 46.Mary Cane prospect adit; fault gouge, quartz,hematite, manganese oxide. See fig. 60; mine map,fig. 46.Mary Cane prospect adit; altered rhyolite, quartz,sericite, hematite veinlets. See fig. 60; mine map,fig. 46.Unnamed prospect shaft, flooded; sunk on fault (N.40 ° E., 58 ° SE.). Sample: fault gouge, rhyolitebreccia, manganese oxide, hematite, sericite.Estimated 50-ft of underground workings, based ondump size. See fig. 60.Native Silver reclaimed (by 1994) shaft. Sample:abundant mafic rock with pyrite, chalcopyrite,sphalerite, from dump (removed since sampling tobackfill the shaft). This site was old and abandonedwhen Schrader (1915, p. 291) examined it;excavated on shear (N. 75 ° E., SE. 85 °) in graniteporphyry, which were not noted by USBM fieldcrews. See fig. 60.Shaft PA352; a second select sample from the dump:gossan, pyrite, chalcopyrite. See fig. 60.B37

Appendix B (Patagonia Mountains CaneJo Hills Unit}- contin.SampleNumber Type Length RemarksPA354PA355PA356PA357PA358PA359ChipChipSelectChipSelectSelect3.5 ft3.0 ftXX3.5 ftXXXXBig Stick prospect trench on fracture zone (N. 70 °E., 75 ° SE.) replaced by andesite with hematite,sericite, manganese oxide, malachite stains. See fig.60.Big Stick prospect, 20-ft-long adit; apparentlyexcavated on same felsite replacement zone asPA354. Altered felsitezone (N. 50 ° E., 41° NW.)sample: felsite, hematite, azurite, sericite,chalcocite. Total dump around the PA354-355 area:35,700 ft 3, or about 1,800st. See fig. 60.Part of Domino group or Lookout Mine. Shaft, about25-ft-deep, vertical, on altered zone or dike (N. 10 °E., dip not noted). Sample: altered gabbro,hematite, manganese oxide. See fig. 60.Part of Domino group or Lookout Mine. Adit, notmapped by USBM, 22-ft-long (trend not noted, likelyNE.). Sample: fault (N. 20 ° E., vertical) at portal,fractured felsite, abundant hematite, manganeseoxide. Host rock noted as "quartz-rich". See fig. 60.Domino Mine adit, locked gate, portalled in alluvium,but intersects hornblende, biotite-rich intrusive[probably Precambrian complex (Simons, 1974,map)]. Sample: granitic rock, chlorite, from dump.About 100 ft of workings estimated from dump size.See fig. 60.Domino Mine, reclaimed shaft and dump; quartz,limonite, hematite, cerussite, manganese oxide fromdump. See fig. 60. If this is the main shaft of theDomino Mine, it dates from 1881-1885, andconceals underground drifting and stoping, on 40-ftand 75-ft depths. Maximum depth was 83 ft in1885. Most stoping is shallow (40-ft-level), and wasundertaken for the first 75-ft to the W. of the shaft(Schrader, 1915, p. 287). Site could become asubsidence problem. Mining target was quartz-richshear with argentiferous lead.B38IIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIPA360PA361PA362PA363PA364PA365PA366PA367PA368SelectSelectChipChipChipChipChipChipChipXXXX3.0 ft3.0 ft3.0 ft1.5 ft3.0 ft3.0 ft1.5 ftDomino mine, caved shaft and overgrown, bulldozeddump. Sample: vein quartz, abundant hematite andlimonite, manganese oxide, granodiorite from dump.See fig. 60. If this is one of the original mine shafts,it dates from 1881-1885 and was 62-ft-deep(Schrader, 1915, p. 287).Cox Gulch (lower) prospects. Adit, not mapped, 20-ft-long, with 15-ft-deep underhand stoping at or nearface. Driven on fault (N. 60 ° E., 70 ° SE.). Sample:vein quartz, pyrite. Adit has rock slabs hanging fromthe back; unsafe for sample collection. See fig. 60.There is apparently another adit downslope by 25-ftin elevation (J. R. Thompson, written commun.,1993). Its position not recorded by USBM fieldcrews.Cox Gulch (lower) prospects. Adit PA362-366 (seemine map, fig. 61). Sample: fault gouge, alteredquartz monzonite, hematite, limonite. See fig. 60.Cox Gulch (lower) prospects. Adit PA362-366 (seemine map, fig. 61). Sample: fault gouge, alteredquartz monzonite, hematite, pyrite stringers, quartz.See fig. 60.Cox Gulch (lower) prospects. Adit PA362-366 (seemine map, fig. 61). Sample: fault gouge, alteredquartz monzonite, abundant hematite, pyrite. Seefig. 60.Cox Gulch (lower) prospects. Adit PA362-366 (seemine map, fig. 61). Sample: quartz vein, abundantdisseminated pyrite. See fig. 60.Cox Gulch (lower) prospects. Adit PA362-366 (seemine map, fig. 61). Sample: fault gouge, pyrite,hematite, limonite, disseminated pyrite, manganeseoxide. See fig. 60.Cox Gulch (lower) prospects. Adit (see mine map,fig. 61). Sample: altered quartz monzonite, clay,hematite, limonite from fault. See fig. 60.West Side Mine, Gray adit; fault gouge, disseminatedpyrite, malachite stains. See fig. 3; mine map, fig. 6.B39

Appendix B (Patagonia Mountains Caneto Hills Unit} contin.SampleNumber Type Length RemarksPA369PA370PA371PA372PA373PA374PA375PA376PA377PA378ChipChipChipChipChipChipChipChipSelectSelect3.5 ft4.0 ft4.0 ft2.0 ft2.0 ft3.0 ft5.0 ft3.5 ftXXXXWest Side Mine, Gray adit; granitic rock,disseminated pyrite, chalcanthite. See fig. 3; minemap, fig. 6.West Side Mine, Gray adit; granitic rock,disseminated pyrite, chalcanthite. See fig. 3; minemap, fig. 6.West Side Mine, Gray adit; fractured granitic rock,abundant hematite, sericite, clay. See fig. 3; minemap, fig. 6.West Side Mine, Gray adit; silicified fault zone,limonite, hematite, sericite, clay, pyrite. See fig. 3;mine map, fig. 6.West Side Mine, Gray adit; granitic rock, abundantpyrite, chalcopyrite. See fig. 3; mine map, fig. 6.West Side Mine, Gray adit; granitic rock, pyrite,chalcopyrite, chalcocite, hematite. See fig. 3; minemap, fig. 6.West Side Mine, Gray adit, stope; alaskite,disseminated pyrite, hematite, malachite (footwall).See fig. 3; mine map, fig. 6.West Side Mine, Gray adit, stope; alaskite, abundantpyrite, hematite, malachite (hanging wall). See fig.3; mine map, fig. 6.West Side Mine, caved adit, contains about 100 ft ofunderground workings, based on dump size. Sample:granitic rock, disseminated pyrite, from dump. Seefig. 3.West Side Mine, same caved adit as PA377.Sample: vuggy quartz, hematite, from dump. Nostructural data collected at site by USBM field crews.Mapping by Simons (1974, map) suggests that thissample is of a quartz-rich segment of a 1,700-ft-longvein that is intersected at the West Side Mine. Seefig. 3.B40IIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA379PA380PA381PA382PA383PA384PA385PA386PA387PA388PA389ChipSelectSelectChipChipChipChipChipChipChipChip2.5 ftXXXX0.4 ft4.0 ft1.5 ft3.0 ft5.0 ft4.0 ft3.0 ft2.0 ftWest Side Mine area, lO-ft-long prospect adit whichintersects fault (N. 73 ° E., NW. 46°). Sample:gouge, quartz monzonite, hematite, limonite,disseminated pyrite, collected at portal. See fig. 3.West Side Mine area, caved adit, conceals about 75-ft of underground workings, based on dump size.Sample: silicified granitic rock, disseminated pyrite,from dump. See fig. 3. Site apparently reclaimed.Shaft, about 25-ft-deep, exposes fracture zone (E.-W., dips S.) in granitic rock. Sample: granitic rockwith disseminated pyrite, sparse malachite, fromdump. See fig. 3.Three R Mine, Colossus adit; hematite vein, goethite.See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fault, footwall, graniteporphyry, hematite, chalcanthite. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit; fracture zone, graniteporphyry, hematite, chalcanthite. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit, same fracture zone asPA384; siliceous hematite, chalcocite, chalcanthite.See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fractured zone, graniteporphyry, sericite, hematite, limonite, disseminatedpyrite, chalcanthite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fault zone, graniteporphyry, sericite, disseminated pyrite, chalcanthite.See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; granite porphyry,quartz, hematite, chalcanthite. See fig. 3; mine map,fig. 5.Three R Mine, Colossus adit; granite porphyry,chalcocite veinlets, azurite and malachite stains. Seefig. 3; mine map, fig. 5.B41

Appendix B (Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA3g0PA391PA392PA393PA394PA395PA396PA3g7PA398PA399PA400PA401ChipChipChipChipChipChipChipChipChipChipChipChip4.0 ft3.5 ft0.5 ft2.5 ft3.5 ft2.5 ft2.5 ft7.0 ft3.5 ft3.0 ft3.0 ft2.5 ftThree R Mine, Colossus adit; altered graniteporphyry, sericite, disseminated pyrite, chalcanthite.See fig. 3, mine map, fig. 5.Three R Mine, Colossus adit; granite porphyry,hematite, disseminated pyrite, malachite stains.fig. 3; mine map, fig. 5.SeeThree R Mine, Colossus adit; fault zone, silicifiedhematite, manganese oxide, gouge. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit; granite porphyry,disseminated pyrite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fault, hematite, alteredgranite porphyry, disseminated malachite and azurite.See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fault, hematite,disseminated pyrite, chalcanthite. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit; fault, hematite,disseminated pyrite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; shear zone, hematite,silicified manganese oxide, disseminated azurite andmalachite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; granite porphyry,hematite, chalcanthite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fracture zone, graniteporphyry, gouge, hematite, chalcocite veinlets.Probably an extension of the PA394 fracture. Seefig. 3; mine map, fig. 5.Three R Mine, Colossus adit; andesite(?),disseminated chalcocite, malachite stains. See fig. 3;mine map, fig. 5.Three R Mine, Colossus adit; silicified graniteporphyry under andesite(?), hematite stockwork,abundant chalcanthite. See fig. 3; mine map, fig. 5.B42IIIIIIIIIIIIIIIIIII

=1'i~Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA402PA403PA404PA405PA406PA407PA408PA409PA410PA411PA412PA413ChipChipChipChipSelectChipChipChipChipChipChipChip3.0 ft1.0 ft2.5 ft4.0 ftXX1.5 ft2.5 ftThree R Mine, Colossus adit; fault, granite porphyry,hematite, disseminated pyrite, chalcanthite. See fig.3; mine map, fig. 5.Three R Mine, Colossus adit; breccia zone, abundantchalcocite, malachite, azurite, granite porphyry. Seefig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fracture zone, hematiteand manganese oxide veinlets, chalcanthite. See fig.3; mine map, fig. 5.Three R Mine, Colossus adit; fault zone, hematite,limonite, gouge, chalcanthite, granite porphyry. Seefig. 3; mine map, fig. 5.Three R Mine, Colossus adit; siliceous graniteporphyry from inclined winze, hematite, pyrite,chalcanthite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fractured graniteporphyry, disseminated limonite, chalcanthite. Seefig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fractured graniteporphyry, disseminated pyrite, chalcanthite. See fig.3; mine map, fig. 5.1.0 ft Three R Mine, Colossus adit; fault, gouge, abundanthematite. See fig. 3; mine map, fig. 5.1.5 ft Three R Mine, Colossus adit; altered fault, gouge,quartz, chalcanthite. See fig. 3; mine map, fig. 5.1.5 ft2.0 ft4.0 ftThree R Mine, Colossus adit; fractured and highlyaltered granite porphyry, abundant hematite andlimonite, manganese oxide veinlets. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit; fractured graniteporphyry, chalcanthite, hematite. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit; fault, gouge, hematite,goethite, malachite, chalcocite, manganese oxide.See fig. 3; mine map, fig. 5.B43

Appendix B (Patagonia Mountains Canelo Hills Unil) conlin.SampleNumber Type Length RemarksPA414PA415PA41 6PA417PA418PA419PA420PA421PA422PA423PA424ChipChipChipChipChipChipChipChipChipChipChip0.8 ft3.0 ft1.0 ft0.8 ft5.0 ft1.0 ft2.0 ft1.0 ft5.0 ftSelectSelectThree R Mine, Colossus adit; granite porphyry, pyritestringers, chalcanthite, hematite. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit; fault zone, alteredgranite porphyry, abundant hematite, manganeseoxide, chalcanthite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; fault zone, gouge,hematite and manganese oxide veinlets, silicifiedgouge, disseminated pyrite, chalcanthite. See fig. 3;mine map, fig. 5.Three R Mine, Colossus adit; pyrite vein,chalcopyrite, chrysocolla, hematite, chalcanthite.See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit; altered graniteporphyry, disseminated pyrite, chalcopyrite,chalcanthite. See fig. 3; mine map, fig. 5.Three R Mine, Colossus adit, pyrite vein,chalcopyrite, hematite, chalcanthite. See fig. 3; minemap, fig. 5.Three R Mine, Colossus adit; rhyolite porphyry,abundant hematite, sericite. See fig. 3; mine map,fig. 5.Three R Mine, Colossus adit; rhyolite porphyry,hematite, chalcanthite. See fig. 3; mine map, fig. 45Flotation mill tailings, Three R Mine. Part of a 4-sample, continuous, vertical channel sample throughthe tailings (see also PA425-427). Less than 6,000st present in total. Sample: lowest 5-ft layer in thetailings, oxidizing zone, composed of sand-sizeparticles with hematite stains. See fig. 3.Flotation mill tailings, Three R Mine; select of grayclay layers that weather blue-green in the PA425sample horizon. See fig. 3.Flotation mill tailings, Three R Mine; select of sandsizeparticles, described by USBM field crews merelyas "tan", in the PA425 sample horizon. See fig. 3.B44IIIIIIIIIIIIIIIIIII

IIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIiIIIIII!,PA425PA426PA427PA428PA429PA430PA431PA432ChipChipChipSelectSelectSelectSelectChip6.0 ft4.5 ft12 ftXXXXXXXX2.0 ftFlotation mill tailings, Three R Mine. Part of a 4-sample, continuous, vertical channel sample throughthe tailings; the 6-ft-thick layer immediately overlyingsample PA422. Described by USBM field crews as"mixed layers of sand and clay". See fig. 3.Flotation mill tailings, Three R Mine. Part of a 4-sample, continuous, vertical channel sample throughthe tailings; the 4.5-ft-thick layer immediatelyoverlying sample PA425. Sample described as"mixed layers of sand and clay". See fig. 3.Flotation mill tailings, Three R Mine. Part of a 4-sample, continuous, vertical channel sample throughthe tailings; the top-most 12-ft-thick layerimmediately overlying sample PA426. Described as"oxidizing layer of sand-size particles, yellow". Seefig. 3.Blue Rock No. 8 claim, shaft, covered with boards,described by USBM field crews as unusually deep[perhaps several hundred ft(?)]. Sample: granite,hematite, iimonite, manganese oxide, from dump.Shaft collar is sloughing in, suggesting that site mayneed to be investigated for a developing physicalhazard. Dump is potentially large, based on roughsize estimate of underground excavations. Fig. 3.Prospect pit (dimensions not recorded) in argillicallyalteredi fine-grained granitic rock. Joints trend N.60 ° E., SE. 70 °. Sample: granitic rock with slightmalachite stains, apparently from dump. Fig. 3.European Mine group, caved shaft in Jurassic-agegranodiorite (Simons, 1974, map). Sample:granodiorite with pyrite, from dump. Dump size:54,000 ft ~ (about 2,800 st). See fig. 3.European Mine group, shaft PA430. A second selectsample from the dump: granodiorite, pyrite,isphalerite. See fig. 3.European Mine group, adit PA432-434; fault(footwall), diorite, hematite. Dump with that of shaftPA430-431. See fig. 3; mine map, fig. 10.B45

Appendix B (Patagonia Mountains-Canelo Hills Unit)- contin.SampleNumber Type Length RemarksPA433PA434PA435PA436PA437PA438PA439PA440PA441PA442PA443ChipChipChipChipChipChipChipChipChipSelectChip1.0 ft1.5 ft0.5 ft1.0 ft0.5 ft1.0 ft5.0 ft3.0 ft4.0 ftXX3.5 ftEuropean Mine group, adit PA432-434; quartz vein,pyrite, hematite, limonite, chalcanthite. See fig. 3;mine map, fig. 10.European Mine group, adit PA432-434; quartz vein,pyrite, hematite, limonite, chalcanthite. See fig. 3,mine map, fig. 10.European Mine group, adit PA435-441; quartz vein,chalcocite, pyrite, malachite, azurite. Dump size:43,000 ft 3, or about 2,200 st. See fig. 3; mine map,fig. 10.European Mine group, adit PA435-441; alteredgranodiorite, quartz vein, chalcocite, pyrite, malachite(same structure as PA435). See fig. 3; mine map,fig. 10.European Mine group, adit PA435-441" quartz vein,pyrite, chalcocite, chalcanthite. See fig. 3; minemap, fig. 10.European Mine group, adit PA435-441; fault, gouge,pyrite veinlets, chalcanthite. See fig. 3; mine map,fig. 10.European Mine group, adit PA435-441; fault (hangingwall), granodiorite, pyrite veinlets, chalcanthite (samestructure as PA438). See fig. 3; mine map, fig. 10.European Mine group, adit PA435-441; fine-grainedphase of the intrusive host rock, disseminated pyrite.See fig. 3, mine map, fig. 10.European Mine group, adit PA435-441; fractured andaltered granodiorite, pyrite stringers. See fig. 3; minemap, fig. 10.European Mine group, trench, 45 ft x 10 ft x 8 ft;apparently excavated parallel to the structure:fracture zone (strikes east, dips 59° S.). Sample:altered syenite, chalcocite, malachite. See fig. 3.European Mine group, Gingerbread adit; alteredquartz monzonite, abundant hematite. See fig. 3;mine map, fig. 10.B46IIIIIIiIIIIIIIIIIII

IIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA444PA445PA446PA447PA448PA449PA450PA451PA452PA453PA454ChipChipChipChipChipChipChipChipChipSelectSelect2.5 ft4.0 ft2.5 ft2.0 ft1.0 ft2.5 ft2.5 ft3.0 ft3.0 ftXXXXEuropean Mine group, Gingerbread adit; alteredquartz monzonite, disseminated pyrite, hematite.fig. 3, mine map, fig. 10.European Mine group, Gingerbread adit; alteredquartz monzonite, hematite. See fig. 3; mine map,fig. 10.European Mine group, Gingerbread adit; alteredquartz monzonite, hematite, rare malachite. See fig.3; mine map, fig. 10.European Mine group, Gingerbread adit; fault, quartzmonzonite, abundant pyrite, chrysocolla. See fig. 3;mine map, fig. 10.European Mine group, Gingerbread adit; fault(footwall), altered quartz monzonite, disseminatedmalachite, hematite, pyrite. See fig. 3; mine map,fig. 10.European Mine group, Gingerbread adit; fault(hanging wall), andesite, disseminated pyrite, quartz,hematite. See fig. 3; mine map, fig. 10.European Mine group, Gingerbread adit; quartzmonzonite. See fig. 3; mine map, fig. 10.European Mine group, Gingerbread adit; fracturezone, abundant hematite, altered quartz monzonite.See fig. 3; mine map, fig. 10.European Mine group, Gingerbread adit; fault, alteredquartz monzonite, abundant hematite. See fig. 3;mine map, fig. 10.European Mine group adit PA453-454, flooded.Sample: quartz, veinlets and stringers of anunidentified black mineral, from dump. A high-'gradesample. Dump size: 3,600 ft 3 (about 200 st). Seefig. 3. Two nearby shafts (to the W.) were notexamined by USBM field crews.European Mine group adit PA453-454; quartzmonzonite, disseminated pyrite from dump. Arepresentative sample of the host rock. See fig. 3.SeeB47

Appendix B (Pa[agonia Mounlains Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA455PA456PA457PA458PA459PA460PA461PA462ChipChipChipChipChipChipChipChip1.0 ft3.0 ft3.5 ft3.5 ft3.5 ft1.5 ft0.8 ft2.0 ftUnnamed adit PA455-463, excavated in Jurassic-agegranitic rock (Simons, 1974, map); fault, alteredgranitic rock, quartz pebbles, disseminated pyrite,chalcanthite. See fig. 3, mine map, fig. 8.Unnamed adit PA455-463; altered granitic rock,pyrite, chalcanthite. See PA455; fig. 3; mine map,fig. 8.Unnamed adit PA455-463; breccia pipe in same hostrock as PA455. Sample: pyrite, chalcanthite. SeePA455; fig. 3; mine map, fig. 8.Unnamed adit PA455-463; breccia pipe in same hostrock asPA455. Sample: brecciatedgranitic rock,pyrite, chalcanthite. See PA455; fig. 3; mine map,fig. 8.Unnamed adit PA455-463; same breccia pipe asPA457-458. Sample: brecciated granitic rock,quartz, abundant pyrite, chalcanthite, selenite. SeePA455; fig. 3, mine map, fig. 8.Unnamed adit PA455-463; same breccia pipe asPA457-458. Sample: brecciated granitic rock,abundant disseminated pyrite, hematite, limonite,manganese oxide. See PA455; fig. 3; mine map, fig.8.Unnamed adit PA455-463; fault breccia, gouge,abundant hematite, limonite, rare pyrite. See PA455;fig. 3, mine map, fig. 8.Unnamed adit PA455-463; granitic rock, brecciazone, abundant hematite. See PA455; fig. 3; minemap, fig. 8.PA463 Chip 1.5 ft Unnamed adit PA455-463; fault (footwall), abundanthematite. See PA455; fig. 3; mine map, fig. 8.PA464 Select XX Adit E. of Ventura Mine adit, flooded in 1991.Sample: vein quartz, abundant galena, sphalerite,pyrite, from dump. Represents any vein that may bepresent in the mine. Dump size: 4,600 ft ~ (about200 st). See fig. 3. NOTE: BAD ATMOSPHERE INADIT (possibly hydrogen sulfide).B48IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA465PA466PA467PA468PA469PA470PA471PA472PA473SelectSelectSelectSelectSelectChipChipChipChipXXXXXXXXXX4.0 ft0.4 ft0.8 ft0.5 ftSame adit as PA464; quartz monzonite, stockworkpyrite, from dump. Represents pyrite-rich zonationthat may be present in the mine. See fig. 3.Same adit as PA464; granodiorite, from dump.Represents un-metallized host rock from the mine.See fig. 3.Unnamed workings at the head of Cox Gulch, floodedadit. Sample: vein quartz, abundant pyrite,tetrahedrite, galena, from dump. Dump size: 4,800ft 3 (about 200 st). See fig. 3.Adit PA467; a second select sample of vein quartz,pyrite, from dump. See fig. 3.Unnamed workings at the head of Cox Gulch, adit,caved in 1991. Sample: quartz, pyrite stockwork,galena, from dump. Dump size: 9,600 ft 3 (about500 st). See fig. 3. Adit was accessible in 1977; itwas at least 225 ft long on a S. 64 ° W. bearing andhad a winze about 140 ft in from the portal. Thewinze was inclined SW. 70 °. Structures within theadit are notknown.Unnamed workings at the head of Cox Gulch, adit,partly caved in 1991, excavated on trend of quartzvein (N. 70 ° E., vertical); adit trends S. 70 ° W.. Aditwas in poor condition (hanging rock slabs from back)in 1991, and was determined unsafe to map.Sample: vein quartz, pyrite, chalcanthite, from aditrib, 75-ft inside portal. See fig. 3. Adit wasaccessible in 1977 and was mapped as no more than60-ft-long.Unnamed workings at the head of Cox Gulch, aditPA471-474; quartz vein, abundant disseminatedpyrite, hematite. See fig. 3; mine map, fig. 11.Adit PA471-474; quartz vein, abundant pyrite,chalcocite veinlets, malachite. See PA471; fig. 3;mine map, fig. 11.Adit PA471-474; fault gouge, disseminated pyrite,chalcanthite. See PA471 ; fig. 3; mine map, fig. 11.B49

Appendix B -(Patagonia Mountains Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA474PA475PA476PA477PA478PA479PA480ChipSelectSelectSelectSelectChipSelect1.5 ftXXXXXXXX1.5 ftXXAdit PA471-474; granite porphyry, stockwork ofunidentified black mineral inveinlets. See PA471fig. 3; mine map, fig. 11.Zinc Adit group of workings; adit, flooded in 1991,excavated in Jurassic-age granite. Sample: alteredgranite, disseminated pyrite, from dump. Dump size:120,000 ft 3 (about 6,200 st). Adit has large portal(about 12-ftin diameter). See fig. 3. Adit wasaccessible in 1977; trending S. 70 ° E. for 215 ft.Structures present are not known. Athird adit ofthis group of workings (to the NE.) was not examinedby USBM.Adit PA475; vein quartz, abundant pyrite and galena,sphalerite, arsenopyrite, from dump. See PA475; fig.3.Zinc Adit group of workings; adit PA477-478. Awasp nest at the portal prevents entry. Sample:vein quartz, abundant pyrite, galena, sphalerite, fromdump. Represents any vein that may be present inthe adit. Dump size: 6,300 ft 3 (about 300 st). Seefig. 3. Adit was accessible in 1977; it was 40-ftlong.Adit PA477-478; granodiorite, disseminated pyrite,from dump. Represents any disseminatedmetallization that may be present in the adit. See fig.3.Denver Mine, 490(+)-ft-long crosscut adit (notmapped by USBM), trends SE., excavated in graniteof Precambrian complex (Simons, 1974, map).Intersects fault (N. 46 ° E., 78 ° SE.) at caved raise indeepest accessible part of adit. Sample: (of faultmaterial) quartz, hematite, limonite, gouge. SitePA483 is the top of this raise. See fig. 62.Adit PA479. Sample: select from dump of veinquartz, galena, chalcopyrite, sphalerite, pyrite,unidentified black mineral. Dump size: 36,000 ft 3,or about 1,800 st. Sample probably mined fromsame structure as PA479. See fig. 62.B50IIIIIIIIIIIIIIIIIII

iillAppendix B--(Patagonia Mountains-Canelo Hills Unit}--contin.SampleNumber Type Length RemarksPA481SelectXXAdit PA479. A second select sample from the dump:quartz breccia, hematite, pyrite. See fig. 62.IIIIIIIIIIII|PA482PA483PA484PA485SelectSelectSelectSelectXXXXXXXXDenver Mine area, shaft, flooded at about 150-ftdepth, sunk on fault (N. 46 ° E., 65 ° SE.) inPrecambrian complex rocks which likely containssome vein quartz. Sample: quartz, abundant pyrite,galena, sphalerite from dump. This is most likely thesame vein as sample PA479-480. Dump size: 3,600ft 3, or about 200 st. Some dump material may havebeen removed, or this site is a raise driven to thesurface from some unknown drift in the PA479 adit.See fig. 62.Denver Mine area, caved shaft sunk on fault (N. 40 °E., 65 ° SE.) in granite of Precambrian complex rocks(Simons, 1974, map). Sample: vein quartz,malachite, galena, pyrite, hematite. About 150 ft ofunderground workings, based on dump size.Connects to adit PA479. Sample probably of samestructure as PA479 and PA480. See fig. 62.Denver Mine area, shaft sunk in Precambrian complexrocks (Simons, 1974, map). Sample: vein quartz,abundant galena, chalcopyrite, unidentified blackmineral from dump. Dump size: 1,400 ft 3, or about70 st. No in place structure seen. Probablyconnects to adit PA485. Possibly intersects thesame vein sampled at PA479, 483. See fig. 62.Shaft had caved by 1994.Denver Mine area adit, driven S. 25 ° E. for 110 ft,then caved at a raise. In granite of Precambriancomplex rocks. Sample: vein quartz, pyrite,chalcopyrite, galena, unidentified black mineral fromdump. Dump size: 54,000 ft 3, or about 2,800 st.• Probably connects to shaft PA484. Possiblyintersects the same vein sampled at PA479, 483.See fig. 62.IB51

Appendix B {Patagonia Mountains-Cane{o Hills Unit}- contin.SampleNumber Type Length RemarksPA486PA487PA488PA489PA490ChipSelectSelectChipSelect5.0 ftXXXX7.0 ftXXTrench (20-ft by 15-ft and 10-ft-deep) trends N. 50 °E. through Precambrian complex rocks (Simons,1974, map). Excavated on fracture zone (N. 50 ° E.,80 ° SE.). Sample: heavily fracturedgranodioritewith heavy iron staining, gouge, quartz. Dump:12,000 ft 3(about 600 st). See fig. 62.TrenchPA486. High-grade from 600 st dump: veinquartz, alteredgranodiorite, epidote. See fig. 62.Trench (50-ft by 12-ft and 2-ft-deep) trends N. 30 °W. through metamorphic rocks [Precambrian complex(Simons, 1974, map)]. Driven on massive quartzzone (extent not recorded). Sample: quartz withopen spaces, local galena and heavy iron-oxide stainhigh-graded from dump. See fig. 62.Trench (50-ft by 12-ft and 3-ft-deep) trends N. 80 ° E.to face of caved or backfilled adit. Driven on fracturezone in diorite with sparse, thin (1/2 in.) quartzveining [part of Precambrian complex rocks (Simons,1974, map)]. Sample: fractured diorite zone (N. 80 °E.) with quartz, hematite. Dump contains measured11,250 ft 3 of rock (about 600 st), suggesting cavedadit may contain another 250 ft of workings. Seefig. 62.Sonoita Mine, two 20-ft-deep shafts, apparently inclose proximity, sunk on quartz vein in Precambrianquartz monzonite. Schrader (1915, p. 290) reporteda N.-S. vein strike. Sample: vein quartz, galena,wulfenite, argentite, sphalerite, from dump. Dump:900 ft 3, or about 50 st, dispersed and overgrown.See fig. 59.PA491 Select XX Same dump as PA490; granodiorite, chlorite,actinolite from dump. See fig. 59.PA492 Chip 3.5 ft Prospect pit of Sonoita Mine area, exposes fault (N.65 ° W., 72 ° SW.) through Precambrian complexrocks. Sample: gouge, hematite, manganese oxide.Pit is 12-ft deep and 12-ft in diameter. See fig. 59.&52IIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIPA493Chip1.5 ftRobert E. Lee Mine area prospect pit (lO-ft by lO-ftand 6-ft-deep) which exposes fault (N. 32 ° W., 85 °SW.) through Precambrian complex rocks. Sample:quartz, gouge, abundant hematite, barite, granite.See fig. 59.IIIIIIIIIIIIPA494PA495PA496PA497PA498PA499ChipSelectSelectSelectSelectSelect1.0 ftXXXXXXXXXXRobert E. Lee Mine adit (inaccessible due hangingrock slabs in mine back), driven on fault (N. 32 ° W.,75 o SW.) through Precambrian complex rocks.Sample: altered granite, abundant galena and barite,manganese oxide. Probably parallels PA493 fault.Adit probably trends N. 32 ° W. See fig. 59.Robert E. Lee Mine caved shaft sunk on fault (N. 75 °W., vertical) in Precambrian complex rocks. Sample:quartz, abundant manganese oxide, vanadinite,mimetite, wulfenite. Estimated 100 ft ofunderground workings, based on amount of rock ondump. See fig. 59.Robert E. Lee Mine shaft, (20-ft-deep), sunk onfracture zone (N. 20 ° W., 75 ° NE.) alaskite (age,formation, uncertain). No visible metallics. Samplefrom dump. Fig. 59.Shaft (about 20-ft-deep), part of the Tres de Mayogroup, sunk in Precambrian quartz monzonite.Sample: granite, hematite, from dump. No visibleminable structure. Fig. 59.Palmetto Mine, shaft (about 200-ft-deep) sunk inPrecambrian complex rocks [primarily quartzmonzonite (Schrader, 1915, p. 290)] near contactwith Jurassic granitic rocks. Sample: quartz,psilomelane, hematite, barite, galena from dump.Workings follow vein (Schrader, 1915, p. 290).Dump size: 29,000 ft 3, or about 1,500 st. See fig.59. Schrader (1915, p. 290) noted two other shaftsand numerous pits around this area that expose themined vein.Same shaft as PA498. A second select sample fromthe dump: barite, hematite, limonite, manganeseoxide. See fig. 59.

Appendix B--(Patagonia Moun[ains Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA500PAS01PA502PA503PAS04SelectSelectSelectSelectSelectXXXXXXXXXXSame shaft as PA498. Athird select sample fromthe dump: quartz, galena, psilomelane, wulfenite,hematite, malachite. See fig. 59.Same shaft as PA498. A fourth select sample fromthe dump: quartz, molybdenite. See fig. 59.Tres de Mayo group, caved adit driven near northernterminus of fault zone between Precambrian complexrocks and Jurassic granite (Simons, 1974, map).Sample: manganese-oxide vein (N. 45 ° W., 55 °SW.) in fault zone, psilomelane; high-graded from an"ore" pile. Fault zone extends for 9,200 ft to the SE.of sample site and for 100 ft to the NW. (Simons,1974, map) but was not sampled beyond PA502 byUSBM field crews. There is a pit, 600-ft SW. on thesame structure (Simons, 1974, map) (not examined).See fig. 59.Jarilla Mine, caved shaft, which was 125-ft-deep in1915, sunk on quartz vein (N. 60 ° E., SE. 80 ° ) alongPrecambrian diorite and quartz monzonite contact(Schrader, 1915, p. 288-289). Sample: vein quartz,hematite, manganese oxide. Dump size: 14,000 ft 3,or about 700 st. Schrader (1915, p. 289) mappedvein for at least 235 ft on strike and noted 4 othershallow excavations on this vein, on strike, within150 ft to the SW. of PA503. USBM noted fault (N.2 ° W., 65 ° NE.) between diorite and granitic rock.See fig. 59.Jarilla Mine shafts sunk in Jurassic granitic rock(Simons, 1974, map); PA504 is about 150-ft-deep,based on dump size and the other (not sampled) is200 ft to N., caved, possibly 100-ft-deep. One ofthese shafts was sunk to at least 70-ft depth by1915 (Schrader, 1915, p. 288-289) and the other isnewer. Sample: vein quartz, abundant manganeseoxide, hematite, malachite, barite, calcite from dump.Dump overgrown, inhabited by snakes. See fig. 59.This shaft and the one 200-ft to N. probably weresunk to intersect quartz vein PA503 down dip andthus sample PAS04 is probably from PA503 vein.These shafts do not intersect vein PA503 on thesurface.B54IIIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIiIIIIIPA505PA506PA507PA508PA509SelectSelectSelectSelectSelectXXXXXXXXXXOld Timer Mine caved shaft (20-ft-deep), sunk onfault (N. 55 ° W., 80 ° NE.) in Precambrian complexrocks. Sample: altered diorite, abundant manganeseoxide, hematite, limonite, malachite from dump.Structure, 8-ft-wide here, has vein filling in part andis 3,000-ft-long on strike (Simons, 1974, map). Seefig. 59.Old Timer Mine caved shaft (about 75-ft ofunderground workings, based on dump size) sunk onalteration zone (N. 55 ° W., 73 ° NE.) in Precambriancomplex rocks; probably same fault as PA505according to mapping by Simons (1974, map).Sample: abundant manganese oxide, barite, galena,vanadinite, wulfenite from dump. Dump size: 3,600ft 3, or about 200 st; contains quality mineralspecimens. See fig. 59.O'Mara Mine, inclined shaft which exposes the majorquartz vein on the property. Open to 50-ft depth in1991, but was originally 140-ft-deep (Schrader,1915, p. 309); 8-ft-wide quartz vein (N. 50 ° E., 72 °SE.) was exposed at this locality, down to the 80-ftlevel in the shaft. Sample: vein quartz, pyrite, raretetrahedrite, from dump. See fig. 57; mine map, fig.58.O'Mara Mine, same shaft as PA507. Wallrock fromthe dump: sugary quartz monzonite, disseminatedpyrite. See fig. 57; mine map, fig. 58.O'Mara Mine, main (lower) shaft, open to about 60-ftdepth in 1991, but was 180-ft-deep when miningtook place (Schrader, 1915, p. 309). Exposes quartzvein (N. 55 ° E., vertical, at this locality). Sample(from dump): vein quartz, unidentified, black,siliceous mineral with radiating crystal form. Asecond select sample of vein PA507. See fig. 57;mine map, fig. 58).B55

Appendix B--(Patagonia Mountains Canclo Hills Unit)--contin.SampleNumber Type Length RemarksPA510PA511SelectChipXX1.0 ftO'Mara Mine, same shaft, same vein as PA509.Sample (from dump): vein quartz, abundant pyrite.A third select sample of the quartz vein on thisproperty. Schrader (1915, p. 309) noted 80 st of oreon the two dumps (PA507-508 and PA509-510).See fig. 57; mine map, fig. 58.O'Mara Mine, caved adit with about 30-ft ofworkings, based on amount of rock on the dump.Exposes vertical quartz vein (N. 30 ° E.) withdisseminated pyrite, hematite. Extent of vein norecorded; not same vein as PA507, 509-510.Sample apparently collected at or near portal. Seefig. 57.PA512 Chip 3.0 ft Prospect pit in fractured granodiorite (fracture N. 40 °E., 67 ° SE.); contains hematite. See fig. 57.PA513 Chip 2.0 ftPA51 4PA515PA516PA517SelectSelectSelectSelectXXXXXXXXCaved adit, about 30 ft long, based on amount ofexcavated rock on the dump; exposes O'Mara Minequartz vein (N. 25 ° E., 42 ° NW. at this locality).Vein contains disseminated pyrite, limonite,granodiorite. See fig. 57. Schrader notes 80-ft-deepshaft was sunk at this site on the Q'Mara Mine vein,which was 5-ft-wide here. Schrader's (1915, p.309) report of assays are 10% Cu, 21 oz Ag/st, and$2/st in gold.Trench, about 40 ft long (trend not recorded);exposes granite breccia, abundant disseminatedpyrite. Sample apparently from dump. See fig. 57.Caved shaft, excavated on fault (strikes N. 15° E.,dips 75 o SE.) through granodiorite of Patagoniabatholith; contains pyrite, galena (sparse). See fig.50.Prospect (bulldozer excavation) exposes quartz veinin vertical, north-trending-fault through granodioriteof Patagonia batholith; contains pyrite, chalcocite,tetrahedrite, galena. See fig. 50.Same prospect as PA516; vuggy vein quartz, pyrite,galena. See fig. 50.B56IIIIIIIIIIIIIIIIIIIi

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIIIIIIPA51 8PA519PA520PA521PA522PA523PA524PA525PA526PA527SelectSelectSelectSelectChipChipChip "ChipChipSelectXXXXXXXX0.5 ft4.0 ft1:0 ft5.0 ft1.5 ftXXHomestake Mine; caved shaft exposes vertical quartzvein (N. 50 ° E.)in granodiorite of Patagoniabatholith. Contains gray quartz, pyrite. See fig. 50.Homestake Mine; caved adit (trends S. 40 ° W.)driven on quartz vein (N. 50 ° E.) through granodioriteof Patagonia batholith. Same vein as sample PA518;contains abundant pyrite. Extent of driftingestimated at 300 ft to 500 ft from amount of dumpmaterial. See fig. 50.Caved, inclined shaft excavated on quartz vein (N.38 ° E., 50 ° SE.). Host rock probably granodiorite ofPatagonia batholith. Sample contains abundantpyrite. May be part of the Jackalo-Paymaster vein,or a sub-parallel vein of the same origin. See fig. 50.Jackalo-Paymaster vein, at Enterprise Mine; adit (fig.51) driven on NE.-striking quartz vein hosted byaltered (hydrothermal?) zone in Patagonia batholith.Sample, from dump, contains abundant pyrite,chalcopyrite, galena. See fig. 50.Enterprise Mine; same adit as sample PA521. Quartzvein, galena, pyrite, hematite, fault gouge. See fig.50-51.Enterprise Mine; same adit as sample PA521; granite,abundant disseminated pyrite. See fig. 50-51.Enterprise Mine; same adit as sample PA521; faultgouge, disseminated pyrite, hematite, altered granite.See fig. 50-51.Enterprise Mine; same adit as sample PA521 ; granite.See fig. 50-51,Enterprise Mine; same adit as sample PA521 ; faultgouge, hematite, quartz, altered granite. See fig. 50-51.Jackalo-Paymaster vein at Paymaster Mine; cavedshaft excavated on fault (N. 15 ° E., vertical).Contains sugary quartz, abundant disseminatedpyrite, unidentified black mineral. See fig. 50.B57

Appendix B--(Patagonia Mountains Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA528PA529PA530PA531PA532PA533PA534PA535PA536SelectSelectChipSelectSelectSelectSelectSelectSelectXXXX7.0 ftXXXXXXXXXXXXSame locality as PA527; vein quartz, disseminatedpyrite. See fig. 50.Shaft, 20-ft diameter, 12 ft deep; in fracturedgranodiorite of Patagonia batholith; contains quartz,pyrite, galena, sphalerite. See fig 50.Haist Mine (PA530-533), prospect pit, 12-ft by 12-ftand 10-ft-deep in siliceous breccia pipe (12-ft-wide,trends N. 65 ° E.). Extent of pipe not known.Sample, quartz, rare malachite. See pl. 1.Haist Mine (PA530-533), same pit as PA530.Sample: breccia, sub-angular clastsof quartzmonzonite, abundant malachite coating fractures,pyrite, from dump. See pt. 1.Haist Mine (PA530-533), adit, almost completelycaved at portal; winze at point of caving. Adit notentered. Sample: a high-grade of the metallized partof a black, aphanitic dike that was the mining targetat this adit; quartz, pyrite, chalcopyrite, black mineralfrom 1,200 ft 3dump (about 60 st). Seepl. 1.Haist Mine (PA530-533), adit PA532. A secondselect sample from dump that quantifies metallizationin black, aphanitic dike: chalcocite, tetrahedrite. Seepl. 1.Olive Mine, northern shaft, about 70 ft deep.Sample: skarn, abundant epidote, actinolite, quartzfrom 3,000 ft 3 dump (about 200 st). See pl. 1. OnHarshaw Creek fault zone (Smith, 1956, pl. 1).Olive Mine, southern shaft (covered, used as waterwell). About 300 ft S. 15 ° E. from shaft PA534,according to Smith (1956, pl. 1). Sample: rhyolite,abundant pyrite, from 64,000 ft 3 dump (about 3,300st). See pl. 1. About 200-ft W. of Harshaw Creekfault zone (Smith, 1956, pl. 1).Unnamed prospect PA536-538, shaft, caved, about35-ft-deep. Sample: sugary quartz, pyrite fromdump. In silicic, Triassic- to Jurassic-age volcanicrocks (Simons, 1974, map). See pl. 1.B58IIIIIIIIIIIIIIIIIII

IIiIIIIIIIIII1Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA537PA538PA539PA540PA541PA542PA543PA544PA545ChipChipSelectSelectSelectChipChipChipChip4.0 ft4.0 ftXXXXXX4.0 ft4.0 ft4.0 ft4.0 ftUnnamed prospect PA536-538; adit, 9 ft S. of shaftPA536, trends S. 85 ° W., 30-ft-long, intersects fault(N. 20 ° W., vertical) at portal. Sample: rhyolite,stockwork hematite veinlets, malachite stains. Minemap in USBM files; not reproduced in this report.See pl. 1.Unnamed prospect PA536-538, same adit as PA537.Sample: altered rhyolite, stockwork hematite, sugaryquartz, collected on NW. rib, 27 ft in from portal.Mine map in USBM files; not reproduced in thisreport. See pl. 1.Winifred Mine, adit, caved, S.-trending. Nearly 1,000ft of underground workings here by 1915 (Schrader,1915, p. 321). Sample: gray rhyolite porphyry,sparse hematite from remains of dump. Dump usedfor road fill, locally. See plo 1.Winifred Mine, adit PA539. Sample: "mafic finegraineddike rock, magnetite, hornblende" fromdump. This is probably Schrader's (1915, p. 322)diorite. See pl. 1.Winifred Mine, prospect pit exposes silicified, 8-in.-wide, fault (N. 35° E., 65° SE.). Sample: quartz,pyromorphite from dump. High-grade. Pit is 10-ft by12-ft and 6-ft-deep to water level. See pl. 1.Four Metals Mine, 5400 level; sheeted granite,.abundant hematite, limonite, sparse malachite.fig. 23; mine maps fig. 25-26.SeeFour Metals Mine, 5400 level; sheeted granite,sparse pyrite and malachite. See fig. 23; mine mapsfig. 25-26.Four Metals Mine, 5400 level; fractured granite,stockwork pyrite, chlorite. See fig. 23; mine mapsfig. 25-26.Four Metals Mine, 5400 level; fractured granite,chlorite, pyrite, rare chalcanthite. See fig. 23; minemaps fig. 25-26.B59

Appendix B--(Patagonia Mountains Canelo Hills Unit)- contin.SampleNumber Type Length RemarksPA546PA547PA548PA549PA550PA551PA552PA553PA554PA555PA556PA557PA558ChipChipChipChipChipChipChipChipChipChipChipSelectSelect4.0 ft4.0 ft4.0 ft4.0 ft4.0 ft4.0 ft4.0 ft4.0 ft4.0 ft4.0 ft4.0 ftXXXXFour Metals Mine, 5400 level; fractured granite,chlorite, granodiorite, pyrite. See fig. 23; mine mapsfig. 25-26.Four Metals Mine, 5400 level; fractured granite,chlorite, pyrite, granodiorite, chalcanthite. See fig.23; mine maps fig. 25-26.Four Metals Mine, 5400 level; chlorite is flow-bandedaround granite, chalcocite, pyrite, malachite. See fig.23; mine maps fig. 25-26.Four Metals Mine, 5400 level; granite, breccia,chlorite. See fig. 23; mine maps fig, 25-26.Four Metals Mine, 5400 level; fault gouge, alteredgranodiorite, pyrite, manganese oxide, rare malachite.See fig. 23; mine maps fig. 25-26.Four Metals Mine, 5400 level; granodiorite, abundantpyrite, chalcocite. See fig. 23; mine maps fig. 25-26.Four Metals Mine, 5400 level; granodiorite, pyrite.See fig. 23; mine maps fig. 25-26.Four Metals Mine, 5400 level; altered and fracturedgranodiorite, stockwork pyrite. See fig. 23; minemaps fig. 25-26.Four Metals Mine, 5400 level; altered granodiorite,marcasite. See fig. 23; mine maps fig. 25-26.Four Metals Mine, 5400 level; fractured granodiorite,disseminated pyrite. See fig. 23; mine maps fig. 25-26.Four Metals Mine, 5400 level; fractured granite,stockwork pyrite, chalcopyrite, malachite stains,sparse chalcocite. See fig. 23; mine maps fig. 25-26.Four Metals Mine, 5260 level; quartz, sphalerite. Seefig. 23; mine map, fig. 25.Four Metals Mine, 5260 level; quartz, abundantpyrite, rare molybdenite. See fig. 23; mine map, fig.25.B60IIIIIIIIIIIIIIII!II

!iiIIIIIIIIII!IAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA559PA560PA561PA562PA563PA564PA565PA566PA567PA568PA569SelectChipSelectSelectSelectChipChipChipChipChipSelectXX4.0 ftXXXXXX2.0 ft3.0 ft4.0 ft2.0 ft1.0 ftXXFour Metals Mine, 5260 level; quartz, barite,sphalerite, hematite, pyrite. See fig. 23; mine map,fig. 25.Four Metals Mine, 5260 level; altered granite. Seefig. 23; mine map, fig. 25.Four Metals Mine, 5090 level; granite, disseminatedpyrite, chalcopyrite stringers, molybdenite. See fig.23; mine map, fig. 25.Four Metals Mine, 5090 level; granodiorite, pyrite,chalcopyrite, rhodochrosite. See fig. 23; mine map,fig. 25.Four Metals Mine, 5090 level; granite, abundantchalcopyrite, bornite, pyrite. See fig. 23; mine map,fig. 25.Jackalo-Paymaster quartz vein (N. 15 ° E., 79 ° SE.)in outcrop; fractured, contains hematite. See fig. 52.Outcrop of diorite dike (N. 10 ° E., 85 ° SE.) that cutsgranodiorite of Patagonia batholith; containsabundant biotite, quartz, hematite. Apparently fromsame fracture zone that contains Jackalo-Paymastervein. See fig 52.Altered granitic rock (Patagonia batholith) fromoutcrop on hanging wall of Jackalo-Paymaster quartzvein (see sample PA565); contains fault gouge,hematite. See fig. 52.Jackalo-Paymaster quartz vein (N. 15 ° E., 80 ° SE.)from outcrop; fractured, abundant hematite. See fig.52.Mafic dike (N. 30 ° W., 62 ° NE.) from outcrop;contains abundant hematite. Apparently from samefracture zone that contains Jackalo-Paymaster vein.See fig. 52.Shaft (about 150 ft deep) on Jackalo-Paymasterquartz vein; sampled gray vein quartz, with abundantpyrite, bladed, unidentified black mineral from dump.See fig. 52.B61

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA570PA571PA572SelectChipChipXX2.0 ft2.0 ftA second select sample of vein quartz from PA569shaft; contains abundant pyrite, chalcopyrite,sphalerite, arsenopyrite. See fig. 52.Jackalo Mine; footwall of fault, abundant malachite,pyrite, chalcopyrite. See fig. 52; mine map, fig. 53.Jackalo Mine; intersecting faults, abundant hematiteand chalcopyrite, pyrite, quartz. See fig. 52; minemap, fig. 53.PA573 Chip 1.0 ft Jackalo Mine; pyritiferous joints in granite. See fig.52; mine map fig. 53.PA574 Chip 2.5 ftPA575PA576PA577PA578PA579PA580PA581ChipChipChipChipChipSelectSelect2.0 ft2.0 ft2.0 ft2.0 ft3.0 ftXXXXJackalo Mine; apparently fault-displaced segment ofJackalo-Paymaster quartz vein; sample of quartz,abundant hematite and gouge, pyrite. See fig. 52;mine map, fig. 53.Jackalo Mine; Jackalo-Paymaster quartz vein, faultgouge, malachite. See fig. 52; mine map, fig. 53.Jackalo Mine; Jackalo-Paymaster quartz vein, faultgouge, malachite. See fig. 52; mine map, fig. 53.Jackalo Mine; Jackalo-Paymaster quartz vein,silicified zone, abundant hematite and pyrite,arsenopyrite. See fig. 52; mine map, fig. 53.Outcrop of Jackalo-Paymaster quartz vein (N. 20 ° E.,dip unknown); fractured, abundant hematite, pyrite,chalcocite. See fig. 52.Prospect adit on Jackalo-Paymaster vein; sampledquartz vein (N. 48 ° E., 78 ° SE.), fault gouge,abundant hematite, malachite stains. Possibly part ofJackalo Mine workings. See fig. 52.Caved, flooded adit. Sample: vein quartz (Jackalo-Paymaster vein), abundant pyrite, chalcopyrite,arsenopyrite, apparently from dump. Possibly part ofJackalo Mine workings. See fig. 52.PA580 adit; mineralized wallrock, apparently fromdump: granite, disseminated pyrite, chalcocite,sparse arsenopyrite. See fig. 52.B62IIIIIIIIIIIIIIIIIIIII

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksIIIIIIIIIIiII!PA582PA583PA584PA585PA586PA587PA588PA589PA590SelectSelectSelectChipChipChipSelectSelectSelectXXXXXX4.0 ft2.0 ft3.0 ftXXXXXXShaft, 25 ft deep and caved, exposes quartz vein (N.20 ° E., 75 ° SE.) that parallels Jackalo-Paymastervein; abundant pyrite, chalcopyrite, malachite stains,arsenopyrite, sphalerite, galena. See fig. 52.Flooded adit with about 200 ft of workings, based onamount of excavated material; sample, apparentlyfrom dump, contains vein quartz, abundant pyrite,chalcopyrite, chalcocite. Probably a vein subparallelto Jackalo-Paymaster vein. See fig. 52.PA583 adit; apparently a second select sample fromdump. Contains quartz breccia, abundant pyrite,hematite, chalcopyrite, arsenopyrite. Vein widthunknown. See fig. 52.Prospect (bulldozer trench); exposes possibleextension of PA582 quartz vein (N. 20 ° E., 80 ° SE.);fractured, abundant hematite, malachite,disseminated chalcocite. See fig. 52.PA585 prospect; highly altered granite on footwallside of PA585 quartz vein; contains abundanthematite. See fig. 52.Caved adit, about 150 ft of workings, based onamount of excavated rock; driven on fractured,vertical quartz vein (N. 25 ° E.). Sample containsquartz breccia, granite, hematite, malachite stains.Probably a subparallel vein to the Jackalo-Paymastervein. See fig. 52.PA587 adit; vein quartz, apparently from dump,abundant chalcopyrite, pyrite, chalcocite, malachite,arsenopyrite, sparse bornite. See fig. 52.PA587 adit; gossan, apparently from dump, abundanthematite and limonite. See fig, 52.Caved adit, with about 250 ft of workings, based onamount of excavated rock; exposes subparallelquartz vein west of Jackalo-Paymaster vein. Sample,apparently from dump, contains vein quartz, pyrite,chalcopyrite, arsenopyrite, rare galena. See fig. 52.B63

Appendix B- (Patagonia Mountains Canelo Hills Unit) contin.SampleNumber Type Length RemarksPA591PA592PA5g3PA594PA595PA596PA597PA598ChipChipSelectSelectChipSelectSelectSelect5.0 ft3.0 ftXXXX8.0 ftXXXXXXProspect pit exposes shear zone (N. 40 ° E., 65 ° SE.)in Patagonia batholith that is probably same fracturezone that hosts vein PA590. Sample of alteredgranite, thin fine-grained dikes, hematite, malachitestains. See fig. 52.Glory hole type shaft excavated on quartz vein(N. 5 ° E., 48 ° SE.); hematite, fractured granite,malachite stains. Probably same vein as samplePA590. See fig. 52.Gladstone Mine (about 500 ft of workings, based onamount of excavated rock), driven on quartz vein thatis probably same vein as PA590-592. Sample: veinquartz, abundant pyrite, chaloopyrite, chalcocite.See fig. 52.Gladstone Mine (same site as PA593); sampledquartz monzonite with malachite stains, the probablewallrock of vein PA593. Sample apparently fromdump. See fig. 52.Prospect pit exposes fault (N. 18 ° E., 60 ° SE.)through altered (probably hydrothermally) quartzmonzonite of Patagonia batholith; sample hasabundant hematite (from footwall). Probably samefracture zone as that hosting PA590-594 veins andfractures. See fig. 52.Same prospect as PA595; vein quartz with pyrite,hematite, chalcocite, apparently from dump. See fig.52.Shaft, about 100 ft deep, excavated on quartz vein(N. 40 ° E., 55 ° SE.) in granodiorite of Patagoniabatholith; contains abundant hematite, sparsemalachite in sample, which was apparently from thedump. Apparently on strike with PA590-596 zone,and may be an extension of it. See fig. 52.PA597 shaft; apparently a second select sample fromthe dump: quartz, sericite, disseminated pyrite. Seefig. 52.B64III1111I1II11111III

I!ill ~ iIIIIIIIIII1IIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA599PA600PA601PA602PA603PA604PA605ChipSelectSelectSelectSelectSelectSelect3.0 ftXXXXXXXXXXXXMinnesota adit; shear zone through granodiorite ofPatagonia batholith. Sample" fault gouge, hematite,malachite stains. See fig. 52; mine map, fig. 54.Minnesota adit; vein quartz with disseminated pyrite,chalcopyrite, from dump. Apparently vein occupiesshear zone PA599. See fig. 52, mine map, fig. 54.Minnesota Mine, caved, flooded adit; sampled veinquartz with abundant chalcopyrite, chalcocite,tetrahedrite, apparently from dump. Part of a 1,800-ft-long vein mapped by Simons (1974, map) ingranodiorite of the Patagonia batholith. See fig. 52.Shaft, about 15 ft deep and flooded; quartzmonzonite, disseminated pyrite, hematite.National Mine, caved adit, with about 100 ft ofworkings estimated, based on amount of excavatedrock on dump. Sample: vein quartz, malachite stainsfrom dump. See fig. 55.National Mine, caved shaft. Was 200-ft-deep in1915, with 400-ft of drifts (Schrader, 1915, p. 310).Sample: vein quartz, abundant pyrite, hematite,galena, sphalerite from dump. Dump noted as large.See fig. 55.National Mine, same shaft as PA604. Quartzbreccia, wulfenite, vanadinite, sparse galena andsphalerite from dump. See fig. 55.PA606 Chip 3.0 ft Isabella Mine; fault gouge, highly altered granite,abundant hematite. See fig. 55; mine map, fig. 63.PA607 Select XX Isabella Mine; vein quartz, abundant galena, pyrite,sphalerite. See fig. 55; mine map, fig. 63.PA608 Select XXPA609SelectXXShamrock Mine, bulldozer trench. Sample: fromhigh-grade material pile with wulfenite, psilomelane.Possibly from PA610 vein. See fig. 55; mine mapfig. 64.Shamrock Mine, bulldozer trench. Apparently asecond select sample from high-grade pile PA608:quartz, psilomelane, hematite wulfenite. See fig. 55;mine map, fig. 64.B65I

Appendix B--(Patagonia Mountains Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA610PA611PA612PA61 3PA614PA615PA61 6PA617PA618PA619PA620SelectChipChipChipChipChipChipChipChipSelectChipXX3.0 ft3.0 ft0.8 ft2.0 ft2.5 ft3.0 ft4.0 ft4.0 ftXX1.5 ftShamrock Mine, bulldozer trench exposes vein:quartz, galena, pyrite. See fig. 55, mine map, fig.64.Shamrock Mine, caved adit, exposes fault (N. 75 ° E.,30 ° SE.): fault gouge, abundant hematite, alteredgranite. See fig. 55, mine map, fig. 64.Shamrock Mine, 30-ft-long adit exposes fault (N. 50 °E., 35 ° SE.). Sample: fault gouge, fractured granite,quartz, hematite. See fig. 55; mine map, fig. 64.Prospect adit of the Shamrock Mine. Fault. Sample:fault gouge, hematite, limonite, manganese oxide.See fig. 55; mine map, fig. 64. Adit inhabited byskunk in January 1991.Same adit as PA61 3; fractured diorite, hematite,manganese oxide. See fig. 55; mine map, fig. 64.Same adit as PA613; fault gouge, fractured diorite,abundant hematite and manganese oxide. See fig.55; mine map, fig. 64.Same adit as PA613; breccia zone between graniteand diorite, abundant hematite, manganese oxide.See fig. 55; mine map, fig. 64.Same adit as PA613; fractured granite, hematite,quartz, manganese oxide. See fig. 55; mine map, fig.64.Shamrock Mine, shaft, caved at about 15-ft depth;was 40-ft-deep in 1915 (Schrader, 1915, p. 311).Exposes shear zone (N. 55 ° E., 65 ° SE.), which wassampled: fractured granite, abundant hematite andmanganese oxide. See fig. 55.Prospect pit of Shamrock Mine exposes quartz vein(N. 85 ° W., vertical): quartz, abundant hematite andmanganese oxide. See fig. 55.Shamrock Mine, 40-ft-long trench exposes brecciatedquartz vein (N. 85 ° W., 54 ° SW.), hematite. Seefig. 55.B66IIIIIIIIIIIIIIIIIiI

iIiiIIIIIIIII!Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA621PA622ChipChip3.0 ft50 ftSame trench as PA620; altered granite on hangingwall, hematite, sericite. Sample site apparentlyadjoins site PA620. See fig. 55.Outcrop; fractured quartz monzonite, stockworkhematite, 0.5-ft-wide diorite dike, limonite. See fig.55.PA623 Chip 25 ft Outcrop; altered granite, abundant hematite, diorite.See fig. 55.PA624 Select XXPA625PA626PA627PA628PA629SelectSelectSelectSelectSelectXXXXXXXXXXJabalina prospect caved adit; estimated 300 ft ofworkings from amount of material on the dump.Sample: quartz breccia, abundant hematite andlimonite, manganese oxide, from dump. See fig. 55.Named "Gross Mine" on modern topographic maps.Jabalina prospect, same dump as sample site PA624.A second select sample of vein quartz material fromthe dump: vein quartz, abundant psilomelane,hematite, magnetite. See fig. 55.Jabalina prospect, same dump as sample site PA624.A third select sample of vein quartz material from thedump: quartz breccia, disseminated pyrite,chalcocite, malachite, galena, manganese oxide. Seefig. 55.Jabalina prospect, same dump as sample site PA624.A fourth select sample of vein quartz material fromthe dump: vein quartz, unidentified, black, bladedcrystals, hematite. See fig 55.Big Lead Mine, caved shaft; about 200 ft of workingsestimated from the amount of excavated material onthe dump. Schrader (1915, p. 312) reported theshaft was 75-ft-deep in 1915. Excavated onintersecting, vertical faults (N. 85 ° E. and N. 65 ° E.).Sample: quartz breccia, hematite from dump. Seefig. 55 for extent of the vein.Big Lead Mine, dump of same shaft as PA628; finegrainedmafic igneous'rock. See fig. 55.~1 ~ B67

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA630PA631PA632PA633PA634PA635PA636PA637PA638SelectSelectSelectChipSelectSelectSelectChipChipXXXXXX5.0 ftXXXXXX1.0 ft3.0 ftBig Lead Mine, caved adit, about 500 ft of workingsestimated from the amount of excavated material ondump. Sample: vein quartz, abundant pyrite; bothare abundant on the dump. See fig. 55.Big Lead Mine, sameaditas PA630. A second selectsample from dump: drusy vein quartz, rare pyrite.Fig. 55.Big Lead Mine, sameadit as PA630-631. A thirdselect sample from dump: vein quartz, bornite,pyrite, chalcopyrite, galena. Fig. 55.Golden Rose Mine, caved adit, shear zone (N. 66 ° E.,77 ° SE.) at portal with abundant hematite andlimonite. Dump is overgrown, composed mainly ofgranite. See fig. 55.Golden Rose Mine, shaft that is caved at 50-ft depth,and estimated to have been 100 ft deep in total.Sample: drusy vein quartz, hematite, limonite, fromhigh-grade of dump material. Historical data suggestthat this shaft explored the same structure asPA633, See fig. 55.Golden Rose Mine, same shaft as PA634; veinquartz, chalcopyrite, malachite, stephanite, galena.See fig. 55.Specularite prospect, caved adit. Containsapproximately 150 ft of workings, based on amountof dump material present. Sample (apparently fromdump): granodiorite, quartz, hematite, specularhematite. See fig. 55.Adit of Specularite prospect, 25-ft-long, excavatedon a fault (N. 85 ° E., 85 ° SE.), apparently with somequartz veining. Sample: fault gouge, hematite,quartz, specular hematite. See fig. 55.Bennett Mine adit, exposes quartz vein (N. 75 ° W.,30 ° SW.) in granodiorite of Patagonia batholith;sample of quartz, pyrite. Field crews noted thatsame zone was sampled at PA639, making this awide zone of quartz veining. See fig. 55; mine mapfig. 56.B68IIIIIIIIIIIIIiIIIII

IIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA639PA640ChipChip2.5 ft3.5 ft ,Bennett Mine; same quartz vein as sample PA638.'See fig. 55; mine map fig. 56.Bennett Mine adit exposes breccia zone (N. 20° E.,75 ° SE.); sample of pyrite, quartz, chaIcopyrite,malachite. See fig. 55; mine map fig. 56.'1IIIIIIIIIIIPA641PA642PA643PA644PA645PA646SelectChipSelectChipChipChipXX6.0 ftXX2.0 ft2.5 ft3.0 ftBennett Mine shaft, flooded at 100-ft depth;Schrader (1915, p. 313) reported this shaft was 200-ft-deep in 1915. Sample (apparently from dump):vein quartz, pyrite, chalcopyrite, chalcocite, raremolybdenite. See fig. 55; mine map, fig. 56.Outcrop of fault (N. 30 ° E., 75 ° SE.) throughPatagonia batholith; sampled fault gouge, quartz,altered granite, malachite, chrysocolla. Samefracture trend as Buena Vista Mine vein, althoughapparently offset to the NW. (see fig. 47).King Mine, caved shaft, about 50-ft-deep, excavatedon quartz vein (N. 68 ° W., NE. 80 °) (see fig. 47) withabundant disseminated pyrite, sparse chalcopyriteand molybdenite. The NE.-striking Buena Vista Minevein does not crop out at shaft PA643; vein PA643is either a cross structure or a fault-offset segment ofthe Buena Vista Mine vein, which is present as closeas 125-ft to the SW. (see fig. 49). The NE. strike ofthe vein is apparent again to the N. at site PA642,where an offset to the NW. is apparent. Outcrop ofthe vein is very poor in this area.Prospect pit (possibly part of King Mine), on fault (N.30 ° E, 72 ° SE.) through Patagonia batholith. Sample:granite, hematite, quartz, manganese oxide (fromhanging wall). See fig. 47.PA644 prospect; brecciated quartz vein, abundanthematite (from footwall). Same fault trend as BuenaVista Mine vein. See fig. 47.Buena Vista Mine, upper adit; shear zone in Patagoniabatholith, with altered granite, gouge, hematite,quartz, abundant hematite, malachite stains. See fig.47; mine map, fig. 49.B69

Appendix B (Patagonia Mountains Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA647PA648PA649PA650PA651PA652PA653PA654PA655PA656PA657ChipChipChipChipChipChipChipChipChipChipChip4.0 ft5.0 ft3.0 ft2.0 ft2.0 ft4.0 ft2.5 ft0.8 ft1.5 ft2.0 ft4.0 ftBuena Vista Mine, upper adit; altered shear zone,fault gouge, hematite, malachite, pyrite, quartz. Seefig. 47; mine map, fig. 49.Buena Vista Mine, upper adit; 1.5-ft of alteredgranite, 2.5-ft of fractured quartz vein, hematite,pyrite, malachite, 1.0-ft of fractured granite. See fig.47; mine map, fig. 49.Buena Vista Mine, upper adit; fractured quartz vein,pyrite, chalcopyrite, hematite, rare molybdenite. Seefig. 47; mine map, fig. 49.Buena Vista Mine, upper adit; quartz vein, abundantdisseminated pyrite. See fig. 47- mine map, fig. 49.Buena Vista Mine, upper adit; quartz vein, abundantchalcopyrite, altered granite, pyrite (hanging wall).See fig. 47; mine map, fig. 49.Buena Vista Mine, upper adit; fractured granite, veinquartz, disseminated pyrite and chalcopyrite. See fig.47; mine map, fig. 49.Buena Vista Mine, upper adit; fractured granite,disseminated pyrite, abundant pyrite, rarechalcopyr.ite and molybdenite. See fig. 47; minemap, fig. 49.Buena Vista Mine, upper adit; quartz vein, pyrite,hematite, malachite, fractured granite (footwall ofvein). See fig. 47; mine map, fig. 49.Buena Vista Mine, upper adit; granite, abundantpyrite, chalcopyrite, malachite (hanging wall of vein).See fig. 47; mine map, fig. 49.Buena Vista Mine, upper adit; fractured quartz vein,abundant hematite, pyrite, chalcopyrite, malachitestains. See fig. 47; mine map, fig. 49.Buena Vista Mine, upper adit; fractured granite,quartz, abundant hematite, malachite, azurite. Seefig. 47; mine map, fig. 49.B70IIIIIIIIIIIIIIIIIII

Iii|IIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA658PA659PA660PA661PA662PA663PA664PA665PA666PA667PA668ChipChipChipChipChipChipChipChipChipChipChip2.5 ft3.0 ft0.5 ft2.5 ft1.5 ft1.0 ft0.8 ft1.0 ft1.0 ft1.0 ft3.0 ftBuena Vista Mine, lower adit, main structure (fault);granite, fault gouge, calcite. Same structure/veinsampled at upper level of Buena Vista Mine; samehost rock (Patagonia batholith granodiorite). See fig.47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; granite,malachite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; fauffgouge, malachite, chrysocolla. See fig. 47; minemap, fig. 48.Buena Vista Mine, lower adit, main structure; quartzvein, pyrite, chalcopyrite, malachite, granite. See fig.47; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; granite, malachite, chalcanthite, pyrite,fault gouge. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; gran!te, pyrite, malachite. See fig. 47;mine map, fig. 48.Buena Vista Mine, lower adit, main structure; granite,abundant pyrite, malachite. See fig. 47; mine map,fig. 48.Buena Vista Mine, lower adit, main structure; granite,abundant pyrite, malachite, gray quartz. See fig. 47;mine map, fig. 48.Buena Vista Mine, lower adit, main structure; granite,pyrite, quartz, calcite, malachite. See fig. 47; minemap, fig. 48.Buena Vista Mine, lower adit, main structure; granite,quartz, pyrite, malachite, chrysocolla, molybdenite.See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; granite,quartz vein, pyrite, molybdenite, malachite,chrysocolla, hematite. See fig. 47; mine map, fig.48.B71

Appendix B {Patagonia Mountains-Canelo HillsUnit)--contin.SampleNumber Type Length RemarksPA669PA670PA671PA672PA673PA674PA675PA676PA677PA678ChipChipChipChipChipChipSelectChipChipChip3.5 ft3.0 ft1.0 ft4.5 ft1.4 ft2.0 ftXX0.8 ft1.5 ft1.0 ftBuena Vista Mine, lower adit, main structure; granite,quartz veins, pyrite, chalcopyrite, rare molybdenite.See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; alteredgranite, fault gouge, abundant pyrite, hematite,chalcopyrite, malachite. See fig. 47; mine map, fig.48.Buena Vista Mine, lower adit, zone that parallels mainstructure; quartz vein, pyrite, chalcopyrite, granite.See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; fractured quartz, fault gouge, pyrite,chalcopyrite, bornite, chlorite, rare molybdenite. Seefig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; quartz vein, altered granite, pyrite,chalcopyrite, bornite, molybdenite. See fig. 47; minemap, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; shear zone, quartz, fault gouge, abundantchalcopyrite, pyrite, hematite, altered granite. Seefig. 4.7; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; vein quartz, altered granite, abundantpyrite, chalcopyrite, fault gouge, malachite. See fig.47; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; quartz vein, abundant chalcopyrite, pyrite,molybdenite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; fault gouge, quartz stringers, chalcopyritepyrite, hematite, altered granite, malachite, selenite.See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; altered and fractured granite, hematite,chlorite, disseminated pyrite, selenite. See fig. 47;mine map, fig. 48.B72IIIIIIIIIIIIIIIIIII

III,IIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA679PA680PA681PA682PA683PA684PA685PA686PA687PA688ChipChipChipChipChipChipChipChipChipChip2.0 ft2.0 ft2.0 ft2.5 ft4.0 ft3.0 ft1.0 ft2.0 ft2.0 ft2.0 ftBuena Vista Mine, lower adit, zone that parallels mainstructure; fault gouge, altered granite, abundanthematite, quartz stringers. See fig. 47; mine map,fig. 48.Buena Vista Mine, lower adit, zone that parallels mainstructure; quartz stringers, chlorite, abundant pyriteand hematite, chalcopyrite, granite. See fig. 47;mine map, fig. 48.Buena Vista Mine, lower adit; granite, chlorite,epidote, stockwork calcite. See fig. 47; mine map,fig. 48.Buena Vista Mine, lower adit, main structure; faultgouge, altered granite, quartz vein, abundantchalcopyrite, pyrite, hematite, molybdenite. See fig.47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; alteredgranite, quartz stringers, chalcopyrite, pyrite,hematite, molybdenite. See fig. 47; mine map, fig.48.Buena Vista Mine, lower adit, main structure; faultgouge, pyrite, chalcopyrite, malachite, alteredgranite, molybdenite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; faultgouge, pyrite, chalcopyrite, malachite, alteredgranite, molybdenite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; alteredgranite, chlorite, malachite. See fig. 47; mine map,fig. 48.Buena Vista Mine, lower adit, main structure; faultgouge, quartz vein, chalcopyrite, pyrite, alteredgranite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, main structure; faultgouge, altered granite, quartz vein, pyrite. See fig.47; mine map, fig. 48.B73

Appendix B--(Patagonia Moun[ains-Canelo Hills Unit) -con[in.SampleNumber Type Length RemarksPA689PA690PA691PA692PA693PA694PA695PA696PA697PA698PA699ChipChipChipChipChipChipChipChipChipChipChip1.5 ft3.0 ft2.0 ft5.0 ft3.0 ft2.5 ft2.5 ft3.0 ft0.5 ft3.0 ft3.0 ftBuena Vista Mine, lower adit, main structure;intersecting faults, gouge, quartz vein, pyrite,chalcopyrite, hematite, altered granite. See fig. 47;mine map, fig. 48.Buena Vista Mine, lower adit, main structure; alteredgranite, hematite, fault gouge. See fig. 47; minemap, fig. 48.Buena Vista Mine, lower adit; altered granite, diorite,chlorite, hematite, fault gouge. See fig. 47; minemap, fig. 48.Buena Vista Mine, lower adit, from a quartz vein thatis W. of the main structure in the mine, and which is30-ft to 50-ft below the footwall of the mainstructure; quartz vein, chalcopyrite, pyrite, alteredgranite, hematite. Probably an extension of thePA674-676vein. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, same vein as PA692;quartz vein, pyrite, chalcopyrite, molybdenite, alteredgranite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, same vein as PA692;quartz vein, pyrite, chalcopyrite, molybdenite, alteredgranite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, same vein as PA692;quartz vein, pyrite, chalcopyrite, molybdenite, alteredgranite, rare bornite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, same vein as PA692;quartz veins, abundant chalcopyrite, molybdenite,rare bornite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, same vein as PA692;quartz veil1, chalcopyrite, pyrite, molybdenite,bornite. See fig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, same vein as PA692;quartz vein, altered granite, fault gouge, pyrite. Seefig. 47; mine map, fig. 48.Buena Vista Mine, lower adit, same vein as PA692;quartz vein, altered granite, fault gouge, pyrite. Seefig. 47; mine map, fig. 48.B74IIIIIIIIIIIIIIIIIII

IAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA700Chip2.5 ftBuena Vista Mine, lower adit, same vein as PA692;altered granite, quartz vein, fault gouge, pyrite,molybdenite. See fig. 47; mine map, fig. 48.PA701Chip4.0 ftBuena Vista Mine, lower adit, same vein as PA692;altered granite, quartz vein, fault gouge, pyrite,molybdenite, malachite. See fig. 47; mine map, fig.48.PA702Chip3.5 ftBuena Vista Mine, lower adit, same vein as PA692;highly altered granite, quartz vein, fault gouge,malachite. See fig. 47; mine map, fig. 48.PA703Chip4.0 ftBuena Vista Mine, lower adit, same vein as PA692;fault gouge, aItered granite, quartz, pyrite. See fig.47; mine map, fig. 48.PA704Chip4.0 ftBuena Vista Mine, lower adit, same vein as PA692;altered granite, quartz vein, pyrite, chalcopyrite,molybdenite. See fig. 47; mine map, fig. 48.PA705Chip2.0 ftBuena Vista Mine, lower adit, same vein as PA692;quartz vein, abundant chalcopyrite, molybdenite,pyrite. See fig. 47; mine map, fig. 48.PA706Chip6.0 ftBuena Vista Mine, lower adit; fractured granite,malachite stains, quartz stringers, abundant hematite,chalcopyrite. See fig. 47; mine map, fig. 48.PA707SelectXXShaft, about 70-ft-deep and flooded, excavated onmain quartz vein of Buena Vista and King Mines(N. 35 ° E., 75 ° SE.). Sample: vein quartz, abundantchalcopyrite, malachite, molybdenite. See fig. 47.PA708Chip1.0 ftProspect pit exposes quartz vein (N. 30 ° E., 75 °SE.), with galena, malachite; associated with maficdike, abundant hematite. Occurs near contact ofJurassic granitic rocks and Precambrian rocks. Seefig. 29.PA709Chip1.0 ftProspect adit in Jurassic granitic rock; driven onquartz vein. Sample: fractured andesite dike,epidote, chlorite. See fig. 29.PA710Chip1.5 ftSame prospect adit as PA709; quartz vein,chalcopyrite, sparse galena. See fig. 29.B75

Appendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA711PA712PA713PA? 14PA715PA716PA717PA718PA719PA720ChipChipChipChipSelectChipChipChipSelectSelect1.0 ft3.0 ft1.5 ft0.8 ftXX20 ft6.0 ft2.0 ftXXXXSame prospect adit as PA709; quartz vein,chalcopyrite, sparse galena. See fig. 29.Same prospect adit as PA709 fractured and alteredgranite, hematite (from hanging wall). See fig. 29.Same prospect adit as PA709; quartz vein, faultgouge, hematite, altered granite, chalcocite,malachite. See fig. 29.Same prospect adit as PA709" quartz vein, hematite,malachite. See fig. 29.Caved adit, driven in Jurassic granitic rock, on quartzvein; about 50 ft of workings estimated, based onamount of excavated rock on dump. Sample: veinquartz, abundant pyrite and hematite, galena,chalcopyrite, from dump. See fig. 29.Bulldozer trench exposes fractured granite, hematite,quartz stringers. Host rock is quartz monzonitephase of Patagonia batholith. See fig. 29.Prospect pit exposes granite/granodiorite contactoriented N. 55 ° W., 55 ° NE. Sample described as"quartz, granite is hanging wall". Apparently a quartzvein along lithologic contact. Host rock is quartzmonzonite phase of Patagonia batholith. See fig. 29.Prospect pit exposes fault zone (N. 55 ° E., 65 ° NW.)through granitic rock; malachite stains at sampledsite. Host rock is quartz monzonite phase ofPatagonia batholith. See fig. 29.Kansas Mine, caved shaft excavated on fault (N. 30 °W., vertical) with skarn, hematite, marble, malachite,manganese oxide. See fig. 30. Four shafts in thisimmediate area (Lehman, 1978, fig. 4); which onewas sampled not noted by USBM field crews.Kansas Mine, ore bin, apparently near site PA719.Sample: quartz, abundant pyrite, sphalerite,chalcopyrite, chalcocite, malachite, sparse galena.Sample represents an estimate of high-gradeconcentrations of Kansas Mine ores. See fig. 30.B76IIIIIIIIIIIIIIIIIII

IiilIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA721PA722PA723PA724PA725PA726PA727ChipChipChipSelectSelectSelectSelect6.0 ft5.0 ft2.0 ftXXXXXXXXKansas Mine, glory hole, excavated on fault (N. 12 °W., vertical) in "highly altered igneous rock withabundant hematite, skarn minerals, manganese oxide(from NE. side of fault)"; this igneous rock probablyis local Tertiary-age diorite (Lehman, 1978, fig. 4).See fig. 30.Kansas Mine, same fault as PA721. Sample:marble, limestone, abundant hematite, altered skarnminerals, manganese oxide (from SW. side of fault).Apparently adjacent to site PA721. See fig. 30.Kansas Mine fault zone (N. 85 ° W., 70 ° SW.) withabundant hematite, gouge, manganese oxide,malachite. See fig. 30.New York Mine (probably), flooded shaft excavatedon fault (N. 30 ° W., vertical) with calcite, abundanthematite, siderite, azurite, malachite, pyrite,chalcopyrite, manganese oxide, rare chalcocite. Seefig. 30. Site apparently re-named Deerwater Mine(Lehman, 1978, fig. 4). See fig. 30.New York Mine (probably), shaft with headframe,about 150 ft of workings; excavated on fault (N. 50 °E., 50 ° NW.) with calcite, abundant pyrite,chalcopyrite, chalcocite, sphalerite, galena, skarnminerals. See fig. 30. Site re-named Simplot Mine(Lehman, 1978, fig. 4). See fig. 30.Indiana Mine, trench on skarn zone (N. 15 ° E.,vertical); marble on SE. side of skarn zone and metaquartziteon NW. side. Sample: brecciated quartz,pyrite, chalcopyrite, galena, malachite, sphalerite,garnet. See fig. 30. Skarn trend is 5,000-ft-long(Lehman, 1978, fig. 4).Indiana Mine, main shaft, caved at about 50-ft depth.Sample: limestone, calcite, abundant sphalerite,galena, garnet, chalcopyrite, pyrite. Conceals about500-ft of underground workings, based on dumpsize. See PA726; fig. 30.B77

Appendix B--{Patagonia Mountains-Canelo Hills Unit) conlin.SampleNumber Type Length RemarksPA728PA729PA730PA731PA732PA733PA734PA735PA736SelectSelectSelectSelectSelectSelectChipSelectSelectXXXXXXXXXXXX6.0 ftXXXXIndiana Mine, caved shaft. Sample: skarn minerals,garnet, abundant chalcopyrite and sphalerite, quartz,calcite, pyrite, sparse galena. Conceals about 750-ftof underground workings, based on dump size; dumpsize not recorded. See PA726; fig. 30.Maine Mine, caved, inclined shaft. Sample: quartz,calcite, chalcopyrite, sphalerite, sparse galena.Conceals about 100-ft of underground workings,based on dump size. Acontinuation of the IndianaMine skarnzone (Lehman, 1978, fig. 4). See fig. 30.Maine Mine, flooded adit, excavated on fault (N. 30 °E., 30 ° SE.). Sample: quartz breccia, hematite.Conceals about 1,000-ft of underground workings,based on dump size. See PA729; fig. 30.Maine Mine, sameaditasPA730. Asecond selectsample of siliceous rock from the dump: sugaryquartz, pyrite. See PA729; fig. 30.Maine Mine, same adit as PA730-731. A third selectsample from the dump: quartz, calcite, abundantsphalerite, chalcopyrite, galena, chalcocite,malachite. See PA729; fig. 30.Maine Mine, inclined shaft with headframe, about100 ft of workings; Sample: quartz, sphalerite,chalcopyrite, pyrite, sparse galena. Extension ofsame skarn zone of the Indiana Mine. Concealsabout 100-ft of underground workings, based ondump size. See fig. 30.Maine Mine, shaft, about 100 ft deep. Sample:gossan zone, abundant hematite, limonite. SeePA733; fig. 30.Maine Mine, shaft to flooded level(s). Sample:quartz, sphalerite, chalcopyrite, sparse galena.PA733, fig. 30.SeeUnnamed adit, about 30-ft-long, excavated on pyriticzone (N. 70 ° E., 50 ° SE.) through granite withdisseminated pyrite. Adit unsafe to enter (hangingrock slabs). Hosted in Patagonia batholith (Lehman,1978, fig. 4). See fig. 30.B78IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA737PA738PA739PA740PA741PA742PA743PA744PA745PA746SelectChipChipChipSelectChipChipChipSelectSelectXX3.0 ft1.0 ft3.0 ftXX3.0 ft2.0 ft2.0 ftXXXXHappy Thought Mine, caved adit. Sample: quartzite,skarn minerals, pyrite, chalcopyrite, sphalerite,galena, unidentified black mineral. See fig. 30; minemap, fig. 33. Part of same skarn zone as IndianaMine and Maine Mine.Happy Thought Mine, adit PA738-741, excavated onfault zone (N. 80 ° W., 55 ° SW.). Sample: quartzbreccia, calcite, hematite, sparse malachite. SeePA737; fig. 30; mine map, fig. 33.Happy Thought Mine, adit PA738-741; skarn zone,abundant sphalerite, galena, pyrite, chalcopyrite,calcite, quartz. See PA737; fig. 30; mine map, fig.33.Happy Thought Mine, adit PA738-741 ; skarn zone,abundant pyrite, galena, sphalerite, chalcopyrite,quartz, calcite. See PA737; fig. 30; mine map, fig.33.Happy Thought Mine, adit PA738-741; skarn, garnet,quartz, hematite, pyrite. See PA737; fig. 30; minemap, fig. 33.Happy Thought Mine, adit PA742-744; skarn zone,quartz, garnet, hematite, calcite, malachite stains.See PA737; fig. 30; mine map, fig. 33.Happy Thought Mine, adit PA742-744; fracturedquartz, skarn minerals, hematite, malachite stains.See PA737; fig. 30; mine map, fig. 33.Happy Thought Mine, adit PA742-744; fracturedquartz, skarn minerals, pyrite, chalcopyrite, galena,hematite. See PA737; fig. 30; mine map, fig. 33.Bonanza Mine, caved shaft. Sample: calcite,abundant galena, pyrite, chalcopyrite, sphalerite,hematite, quartz from dump. Deposit within a faultzone, over 4,000-ft-long (Lehman, 1978, fig. 4). Seefig. 30; mine maps, fig. 31-32.Bonanza Mine, glory hole. Sample: quartz breccia,hematite, pyrite, malachite. See PA745, fig. 30;mine maps, fig. 31-32.B79~.!~i ¸ !,:

Appendix B--(Patagonia Mountains-Canelo Hills Unit)- contin.SampleNumber Type Length RemarksPA747PA748PA749PA750PA751PA752PA753PA754PA755SelectChipSelectSelectSelectSelectSelectSelectChipXX6.0 ftXXXXXXXXXXXX4.0 ftAnnie Mine open stope, flooded at 20-ft depth;intersectsskarn(N. 15 ° W., 68 ° SW.). Sample:pyrite, quartz, sphalerite, chalcopyrite, hematite,galena, malachite. See fig. 30.Annie Mine, 60-ft-long trench exposes skarn zone (N.40 ° W., dip unknown) with abundant garnet,manganese oxide, hematite, fractured quartz,malachite stains. See fig. 30.Annie Mine, flooded shaft, exposes skarn zone (N.25 ° W., vertical) with garnet, chalcopyrite, pyrite,hematite, manganese oxide, malachite. There aretwo shafts in close proximity here (Lehman, 1978,fig. 4). See fig. 30.Four prospect pits, mostly caved, expose skarn withepidote, quartz, chalcocite, malachite. See fig. 30.Holland Mine, reclaimed area of main shaft[connected to 3 underground levels (Lehman, 1978,fig. 28)]. Sample. quartz, garnet, pyrite, calcite,chalcopyrite, sphalerite, galena, unidentified blackmineral. See fig. 30.Duquesne Mine, flooded shaft. Sample: quartz,garnet, abundant chalcopyrite, pyrite, galena,sphalerite. Estimated 400-ft of undergroundworkings concealed here, based on dump size. Seefig. 30.Benton Mine, caved adit. Sample: granite,disseminated pyrite, magnetite, malachite. Dumpcontains 300 ft 3 of rock (about 20 st). An 8-ft-deeppit (not shown) is 20 ft away from adit portal. Seefig. 27.Benton Mine, two small caved adits, in closeproximity. Dumps total 200 ft 3 of rock (about 10 st).Sample: granite, malachite stains. No vein orstructure noted. See fig 27.Benton Mine, prospect pit exposes fault zone (N. 70°W., 65 ° SW.), with quartz stringers, stockwork-hematite. Fault cuts granite (on footwall) andandesite (on hanging wall). See fig. 27.B80IIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIAppendix B--(Patagonia Mountains-Canelo Hills Unit)--contin.SampleNumber Type Length RemarksPA756PA757PA758PA759PA760PA761PA762SelectSelectSelectSelectChipSelectChipXXXXXXXX6.0 ftXX2.0 ftBenton Mine, open adit, not entered by USBM fieldcrews. Dump contains 10,000 ft 3 of rock (about 500St): Sample: granite, quartz, pyrite, chalcopyrite.See fig. 27.Line Boy Mine, flooded adit, with 24,000 ft 3 of rockon dump (about 1,300 st). Adit was 65-ft-long in1915 (Schrader, 1915, p. 348); driven S. 25 ° W. onfractures and joints in granite. Sample: granite,pyrite, sparse chalcopyrite, from dump. See fig. 27.Line Boy Mine, shaft, 50-ft-deep, probably connectsto flooded adit PA757. Sample: granite, abundantmagnetite, pyrite, limonite, from shaft dump. Seefig. 27.Unnamed manganese prospect, 3 pits on trend ofmanganese-oxide veinlets (N. 85 ° W.); trend is 50-ftlong,30-ft-wide through unaltered rhyolite-quartzlatite. Sample: high-grade of rhyodacite withpsilomelane, rare rhodonite. See pl. 1.Unnamed manganese prospect, 4-ft by 5-ft, 2-ft-deeppit on same manganese-oxide veinlets as PA759.Sample: veinlets (psilomelane, rare rhodonite) inrhyodacite. Trend varies from PA759 (N. 15 ° W., dipnot recorded). See pl. 1.Unnamed manganese prospect, 10-ft by 4-ft, 3-ftdeeppit on breccia/manganese-oxide veinlet trend (N.60 ° W., dip not apparent) through rhyolite. Sample:rhyolite with psilomelane. See pl. 1.Unnamed manganese prospect; trench, 20-ft-long, 4-ft-wide, 3-ft-deep excavated on fracture zone (N. 75 oW., vertical) in rhyodacite with weak psilomelanemineralization in stringers as much as 0.5-in.-wide.See pl. 1.B81

iAPPENDIX CASSAYS OF RECONNAISSANCE ROCK-CHIP SAMPLES FROMPATAGONIA MOUNTAINS-CANELO HILLS UNIT,BY BONDAR-CLEGG AND CO., LTD.USING THE NEUTRON ACTIVATION METHODElementDetection limit [lower/upper (if applicable)]Ag (silver)5 ppm/-As (arsenic) 1 ppm/-Au (gold)5 ppb/-Ba (barium) 100 ppm/-Br (bromine) 1 ppm/-Cd (cadmium) 10 ppm/-Ce (cerium) 10 ppm/-Co (cobalt)10 ppm/-Cr (chromium) 50 ppm/-Cs (cesium) 1 ppm/-Eu (europium) 2 ppm/-Fe (iron) 0.5%/-Hf (hafnium) 2 ppm/-Ir (iridium)100 ppb/-La (lanthanum) 5 ppm/-Lu (lutetium) 0.5 ppm/-Mo (molybdenum)2 ppm/-Na (sodium) 0.05%/-Ni (nickel)20 ppm/-Rb (rubidium) 10 ppm/-Sb (antimony) 0.2 ppm/-Sc (scandium) 0.5 ppm/-Se (selenium) 10 ppm/-Sm (samarium) 0.2 ppm/-Sn (tin)200 ppm/-Ta (tantalum) 1 ppm/-Tb (terbium) 1 ppm/-Te (tellurium) 20 ppm/-Th (thorium) 0.5 ppm/-U (uranium) 0.5 ppm/-W (tungsten) 2 ppm/-Yb (ytterbium) 5 ppm/-Zn (zinc)200 ppm/30,000 ppmZr (zirconium) 500 ppmC1

Appendix C--Assays of reconnaissance rock-chip samples by Bondar-Clegg & Co., Ltd.using neutron activation analysis method (direct irradiation/INAA)(Patagonia Mountains-Canelo Hills Unit)[, greater than; opt, results re#orted i~troy ounces per short ton and also indicative of re-assay, by fire assay method, at higher detection limit; ---, equals "value not reported for this element".sample Ag AS AU Oa Br Cd Ce CO C~ CS EU fe Hf Ir La LU Mo Na Nt Rb Sb SC Se S~ sn fa rb re Th u ~b Zn Zrno. (ppm) Ippm) I~) (~) Ip~m?. I~m) (~m) ~ppm~ ipp~) Ippm) (ppm) t~t) ~p~) , (~b), pp~) (ppm) (pore) (pet) p~m) (ppm) (pp~) (po') (opm) (pp~) t~ ~) (opt) {p~') (op') (~pr) (p¢:~) tD~ ~) lop') (~pc) Ion-!PAO0I • S 9< S 1300 < I < lo 95 35 140 II ) 8.6 I < ioo35 < 0.5 < 2 0.41 20 200 l.O 21,01o 6.o zoo ¢ 1• 20 e.s 2,g < 2 < 5 , 2o0soopAOO2 < 6 7• s 880 < I ( I0 6z • IO 51 lO < 2 >I0,0 5 < i0032 < 0.5 < 2 o,52 2o 2oo o,~ 21.01o 4; 2o0 60 06?120 410 39 540 21 < IO 160 < I • 2 0.8 < 2 < IO0< o,s 17 4.?0so • Io 8as.o • o.slo o.s ~oo 2000OsooPAOO6 43 175ISO 12o0 5 79 30 < l0 250 6 • 2 1,9 • 2 < 100Ii o,g g 0.05so 2e 2~7,0 2.0io 1.~ 2O0• 40 3.0 a.o4 ; >200005oopAOOI 6 12546 6~0 ! • lo 90 < IO 100 31 • 2 4.4 • 2 < I0036 0,9 Is 0.0650 2£0 2F,6 IO.O< 20 19,0 ~o,osoop&ooe < 5 63< 5 640 < I • lo g~ 25 i20 21 < 2 4,0 4 < too43 2.~ 6 O,tl~o 6.~ ~oob < S ~005ooPAO09 ( 5 1815~ 910 4 • 10 22 • lO 180 13 < 2 3,2 • 2 < lOO22 l.l 8 O.O5so e6 lro.o 6.1:o 3.7 zoo< 20 :7.0 ll.o5 9805ooPA010 27 29693 290 4 • tO 26 < IO 360 34 • 2 5.3 < 2 < IOO26 < 0.s 12 0.O5SO ]90 ]12.0 7.Iio 3.7 ~002O 10,0 o.e6 5 ~JO000~ooPAOli • 5 659 ~o < t • 10 93 31 170 44 < 2 3.1 3 < 1o03~ 1.4 9 0.09SO Lgo ~1,3 9.1~o 5,2 • 200sooPAOI2 )3 13240 3100 3 19 53 18 220 3? < 2 S.l • 2 • IO020 I.I It 0.06so 13o ~4,0 ~.g• 20 7.8 11.0 5 < ~ ;4000soopAOI3 < 5 236 700 < I • IO 72 21 IIO 82 < 2 5.2 • 2 • IO033 1.1 < 2 o m 2o50 Z20 4,7 H,oIo S.8 • ~oo2o ~1.0 i0.0 s < 5 ~40sooPAO14 < S 112o~ 300 6 < 10 68 < l0 < 1~ 12 • 2 3.1 < 2 < lOO32 1,3 19 Om0950 1o 263.0 6.71o ?.~ , 200aS Is.o ;3,0 ~ to ~oPAOI5 • S ~016 510 3 < l0 z6 < 10 13o 35 < 2 5.3 3 < Ioo33 1,2 ? 0.0750 210 ~4.0 9.4to S.5 < 2O020 2~.0 11.o ~ < 5 ~ 20CsooP~Ot6tq83~ 1t70~ l 170 4~ < tO 150 4 < 2 1,5 4 < 100to ~.o < 20O20¢,6 ¢,0 < 2 • 5 >ZOO005ooPAOI7 12 1]22 530 • I • IO IlO < IO < 50 6 < 2 3.9 8 < I0050 < 0.5 )0 2.40 29 180 8,6 4.O1o s.~ < 2O0• 20 13.0 6.6 < 25 ~BO0sooPAOIB < 5 35< 5 700 c I • 1o 150 < Io ~ • I 3 >IO.O 9 < I0055 < 0.S 2 0.12 < 2o < to 3.2 22,0IO g.~ • 20O20 2~.0 S.s • 25 200sooP~019 < 5 179< s Iooo 4 < tO68 < Io 120 9 < 2 >lo,o a < I00 31 0,6 • 2 0.19 ~ 2o I00 8,5 20.020 5.8 ¢ 2005 ]80sooPA020 < 5 166II 350 Z < IO41 < I0 32O • l < 2 4.7 9 < IO0 24 < 0.5 l0 O.OS • 20 • 10 Io.o 8.8Io ~.1 • 20O20 B.6 4,4 s5 5205oopao21 • s 33< s 2200 < I • I0 60 < I0 • so2~ < ~ ~.o < 2 < Ioo 33 < O.S 2 O.IO 20 ~20 ro.o 4.5io s.¢ • 2o020 16,o ~.o 45 ano ~0oP~OZ2 < s 179 610 < ! • 10 120 • 10 < 502 • ~ 1.4 ~ • 100 50 • 0,S 9 0,o~ • 20 20 ~,5 8,4to 6.~ < ~oozo 50.7 lO.O 320OS~OPAO23 < 5 126 950 < I < IO llO • IO llOI < ~ I.I e • IOO ~4 < OmS ~ o,os < ~o I~ ~1.o 3.O~0 a,l < 200~o 31.o 7.7 4s 2oo sooPAO24 37 38990 < 400 02 • 40 go < lO < 3Z06 • F 2.F • F < 240 18 3.8 21 0.12 c SI IlO 1090.0 2,144 3.4 < 1600130 14.0 2.6 8s2 54o ~2oop~ozs ~z ?tss ~?o l~ < 1o I~ < to t~OI~ • Z lmS 3 < tO0 20 • O,S 13 O.OS < ~0 ~¢0 t~,o ~,~lO ~.5 , 7nozo qa s.t ~o.o < 2 < tOO 3~ < o.5 ~ o.o~ ( ~o 300 q1,6 ~.o)o 27.0 kO.O 5PAO2g 5g 240I~O 830 30 < 21 IOO 11 < 140~2 • 2 4.7 • R ( 100 ~ { l.O ~4 ( o,o~ ( 2o ~70 414.0 8,023 4.~ ~ glo68 26.O 14,0 to15 ~50o sooPA02g IF 64160 560 e < Io I1O < Io < SO43 < 2 4.4 6 < Ioo 37 < 0.5 ~3 O.O~ • 20 )eo ~l,m lo,oIo ~.~ • ~oo20 61.5 1~,o 16P~030 7 6~20 200 ~ < 10 67 < Io

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< 10 38 • 10 440 2 < 2 2.1 8 • 10040 • O,S 3 0,11 40 330 8.9 14.0 1241 20000 12 110 92 • 10 • 50 5 3 1.0 6 • 100 3~; • 0.5 20 • 0.05 • 20 ?5 140,093 >20000 10 < 10 58 < 10 300 3 < 2 3°5 < 2 < 100 27 1.0 11 < 0,12 41 • 22 351.023 18200 21 < 22 76 • 10 130 6 < 2 2*7 • 2 < 100 24 < O.S 11 < 0.18 • 20 93 539.0$4 SO00 57 < 45 eO < 10 < 200 3 < 8 1.6 < 3 < 300 22 < 2.0 < 12 < 0.40 70 < 60 1890.06.9 < I0 e,6 < 200 1 1 • 20 28.0 12.0 ? • s 1500 • soo4.4 c 10 6.4 < 520 < 1 • t • 43 19.0 8.2 3 • s >20oo0 • 5007.0 < 10 5.0 • 53O • 1 • 1 • 55 8.9 5,7 10 < s looo • Soo~.1 • 22 4.2 < 690 • 1 • 1 < 73 8.4 3.6 • 5 < 5 1300 < soo5.1 < 49 3.7 < 1600 < i • ; • 170 15.0 I2.0 • 0 28 340 • 1600PA061 < 5 176043 4700 20 < 25 52 < 10 < 150 9 < 2 4.2 • S < 100 35 < 1.0 9 < 0.16 • 20 42 410.07.0 • 26 ?.g • 800 • i • 1 • 07 16.0 15.0 5 16 • 200 • SO0pA002 78 3220~4 3300 73' • 0~ 110 < 10 < 400 3 < 10 3.4 < 12 ¢ 420 14 3,S < 19 0.58 < 00 • 78 2560.03.7 < 70 2,0 • 2200 < 1 • 1 < 240 • 4,0 4.3 ¢ 14 50 • 590 • 2200pA063 >100 5220 < 390 2900 404 < 360 $20 • 68 < 1800 < 12 < 43 < 3.9 < 53 o-- 25 ¢ 13.0 < 71 < ?.30 < 380 • 340 >sooo.o < 5.3 • 310 1.7 • 9500 • 8 • 5 100 2300 < 130 15600 140 < 120 210 < 33 < 7205 < 19 2.2 < 22 • 750 12 5.2 51 < 1.30 < 160 • 140 4860.0 3.5 • 130 3°0 • 4000 • 3 2 • 420 • 11.0 < 6.3 < 25 110 < 940 < 3700pAO~5 >100 169 140 13300 29 < 30 41 < 10 < 1~6 < 4 1.5 < S • 100 9 < 1.0 7 < 0.23 < 43 83 698.0 • 0.5 • 25 1.3 < 869 • 1 < 1 < 90 < 2.2 9.0 • 11 16 • 200 < llO0pAO~6 16 17 < S 240 3 < 10 70 < 10 73pAO~7 < 5 165 23 620 3 < 10 190 < 10 < $0PAOli • 5 1000 10 560 43 < 22 63 60 • 180PAOOg < 5 582 < S 1300 16 • 10 93 33 65PAO?O >100 333 55 2900 ?9 • 52 100 45 < 29018 < 2 1.6 4 • 100 37 < O.S 12 < 0.05 • 20 300 67.3 2.9 • 10 4.6 • 200 2 • 1 < 20 16.0 7.5 • 2 • 5 840 • 50027 < 2 2.2 3 ¢ 100 59 < OoS '~ 2 0.10 < 20 410 13.0 12,0 < I0 11,0 < 200 • I < I < 20 16.0 6.0 5 • S < 200 < 50031 8 4.5 < 4 • 100 37 1,1 24 0.07 < 20 230 359.0 11.0 < 24 7,1 < 820 • 1 < 1 < 70 17.0 7.5 10 < 13 260 < $0035 < 2 3.6 < 2 < 100 33 < 0.5 9 0.22 31 220 100.0 12.0 • 10 6,1 < 200 < 1 < I < 20 16.0 6.6 6 • 6 < 200 < $o017 12 0,9 < 0 < 310 32 < ;~.0 24 < 0.5l < 74 83 1770.0 ~,.0 < 50 4,3 < 1600 2 < 1 < 170 6.7 20.0 ~ ;3 47 900 < 1800P~071 • $ $0 < S 1400 • 1 • 10 95 28 140PAO?2 >100 725 < 130 3300 131 • 120 210 • 30 < 710PAO?3 >100 $11 < 110 < 940 106 • 100 170 • 24 < 590PA074 ,100 1020 • 150 5000 196 • 150 210 • 21 < 690PA075 49 105 18 2100 12 • 10 32 33 1900 < 2 5.6 6 < 100? 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. . . . . . . . . . . . . . . . . . . . .i I m ~ i ~II I ~ i ~ m¢*-Pata onla Nountalns*Canelo Htlls unlt-*contln.S. . . ./. .•J~p. .e. .n.d. l xCd . . . . PF ~ ~ Fe e . . . . . . pp~ . . . . . . . . . . . . ~ . . 6n . .Zn ZrPA466 • 5 2870 30~ 060 25 31 61 44 110 6 3 >10,0 • 3 • 100 41 1,1 • 2 0.16 • 59 I10 32,5 35.0 < I0 8.4 • 570 < I • I • 54 4.1 3,3 14 10 4500 • So0PA407 >100 4470 4060 250 43 26 46 10 350 I 2 0.7 • 5 • 190 5 0,5 11 0.07 • 53 35 133.o 3,9 • 21 0.9 • 800 • I • I < 76 l.S 1.5 5 5 1800 • SO0• • < • • • • • • • •PA~B8 91 5O9 IO20 100 24 • 21 • 3; < 10 220 1 • 2 ;,6 • 2 • 100 8 0,9 19 0.05 • 20 ~3 349,0 2,8 • 10 1.5 • 660 • 1 • L ¢ 61 < 1.2 1.7 6 5 980 • 500• •PA4B3 < 5 479 52 380 6 • 10 78 40 51 6 3 >10.0 0 • 100 38 • 0.5 • 2 2,10 < 43 130 27,1 44.0 • 10 8.5 • 200 < I • I < 20 3.5 1.4 5 ~ 2200 < 500PA490 >100 >20090 5O1 < 280 19 < 30 67 • 10 190 1 • 4 2.7 • 5 < 220 5 • 1.3 1960 < 0*20 100 25 609.0 0,5 < 10 1,1 • 890 • I • | 130 2.G 51.9 15 31 9100 1200• • • • • • 100 225 46 >2OO00 0 • 38 100 10 300 22 • 5 2.9 • 6 • 230 05 2.1 400 • 0.80 • 48 62 ~550.0 6.8 • 21 3.2 1000 • < J 150 2.6 6.8 14 42 660 1000• • • • • •PA4g5 >100 1370 83 760 • 303 < 100 35 • 10 710 5 • 4 4.2 • 2 • 280 25 • 1,1 484 • 0.05 < 20 45 2710.0 0.7 • 20 3.5 • 650 • • I • 90 < 1.5 • 4,3 • 11'O • 16 • 1300 • 500PA496 14 32 8 100 2 < 10 100 • 10 310 2 < 2 0.9 10 • IO0 84 0,8 • 2 5,02 • 20 22 42.1 7.3 < 10 14.0 • 200 Z • 20 17.0 2.1 < 2 7 • 200 • 500PA497 < 5 13 < 5 280 2 < 10 130 • 10 520 • I • 2 1,5 7 • 100 51 1ol 15 4,00 < 20 65 43,6 5.8 < 10 10.0 • 200 • 2 • 20 8,2 1,3 • 2 < 5 < 200 • 500PA498 >100 1960 656 4000 336 110 37 14 33O 5 < 4 >10.0 2 • 150 20 1,5 130 0,05 • 20 33 3450,0 5,8 • 21 2.6 • 690 • I 100 1.6 75.9 190 13 5700 • 500• • • • < • • • < 20000 < 5 • 26 61 10 310 2 < 2 6.9 • 4 • 100 6 1,2 58 • 0*51 • 20 < 10 814.0 2,5 • 10 < 0,7 • 690 • • 1 • 100 • 2,0 23.0 32 22 3000 • 5OO< •PASO0 >100 2160 1420 15300 368 130 42 < 10 23O 1 < 5 >10.0 • 4 • 220 50 1.0 110 • 0.05 • 42 • 35 3490,0 0*5 • 23 • 3.8 • 730 • 1 < lL0 • 1,7 155,0 5000.0 • 3,6 • 150 • 5.2 < 5000 • 8 < 4 < 850 • 12.8 • 52.0 • 2 • 120 < 2400 • 6400PA904 >100 1060 63 820 248 < 78 37 39 540 13 • 2 6,g • 2 • 110 23 1.1 46 < 0,06 • 20 42 2050.0 12.0 ¢ 10 4,9 • 460 • I • I • 72 • 1.1 • 3.3 ~40 • S 680 680< •PASO5 >100 5680 • 320 • 2300 • 1 < 300 130 • 50 • 460 < 25 • 19 5.3 • 13 • 100 • 85 • 3.9 • 53 • 0,05 < 120 • 170 >5000*0 15.0 • 73 • 4.4 • 2300 • 3 • I • 360 • 5,5 < 13.0 • 610 • 100 • 510 • 2~00PAS06 >100 1380 80 >20000 236 < 100 33 • 10 460 11 < 2 2.0 • 2 • 130 52 1.7 101OO • O.0S • 20 • 28 2850,0 • 0.5 < 10 4.1 < 570 • I • i • 88 • 1.4 • 4,3 6O6 25 • 200 < 500PAS07 >100 5300 1660 • 740 *-- < 510 < 98 < 22 < 3O0 3 • 20 >10.0 • 11 • 630 < 140 • 3.5 • 64 • 5.00 • 120 • 99 >0,0 • 1,4 • 45 < 2.7 • 1900 3 • 1 • 290 < 4,2 • 18,0 100 >10000 ~ 490 < 745 < 300 < 64 < 23 < 180 • I < 22 >10,0 • 7 • 540 • 54 • 4,0 • 73 < 5,00 • 69 • 56 >0.0 • 0.5 < 28 • 1,1 • 1100PAS17 >100 5;90 550 250 • 07 120 < 10 < 200 4 • 11 3,6 11 < 310 20 < 2,3 • 15 • 1.80 • 04 85 660.0 2.2 < 54 1,7 < 20003700 • • 5000.0 1.9 1|0 0.4 < 3300• < ¢ • • •PAS19 54 3720 929 < 750 99 • 80 140 • 10 • 480 4 < 32 0.0 < 14 • 500 • 5 5,7 < 17 < 1.10 • 120 < 97 2qoo.o < 1.6 • 04 1,2 ¢ 2600PA520 50 663 5440 • 240 55 • 32 • 56 68 84 • I • 5 >10.0 • $ • 100 • 5 • 1,0 46 • 0.34 • 43 < 32 60.0 • 0.5 • 25 0.4 • gLO• 10000 7600 < 1200 < 160 < 14(] 2:30 < 24 • 760 6 < 13 >10.0 < 21 • 000 • 5 • 4,5 < 28 < 0,03 • 190 < 120 2420.0 • 2.6 < ]30 < 1.0 < 3900 < 3 • 3 • 440 < 9.2 < 7.1 >2000 • 93 9200 • 4200PA528 • 5 8770 3690 < IOQ < 18 • 10 25 • 10 490 • 1 • 2 1.6 • 2 • 100 < 5 • 0.5 8 • 0,65 • S0 • 10 196.0 • 0,5 < 10 • 0,3 • 470 < I < I < 54 < 1,1 < 0,6 62 • 13 690 • SO0P~529 99 166 5580 < I00 0 19 < 29 < 10 610 • 1 • 2 6*8 20 • I00 7 < 0.5 100 • O.0S • 20 34 05,6 < 0.5 < 10 1.2 • 430 • I < I < 2O < 0.5 6,2 925 < 5 11006 < SCOPA530 6 23 < 5 960 < 1 • 10 77 < 10 76 24 • 2 1.6 4 < 100 36 0.9 4 0.13 • 20 310 17.0 6.9 • IO 6.6 • 200 1 • I < 2O 16.0 4.8 23 • 6 3400 c S00C13i i i!;iiill iii

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L 13.0 9e 14 S?0 • 5O0PA590 36 >10000 20O0 340 35 • 64 44 28 $60 • 1 • 2 2.4 • 2 • 100 < 5 < 1.0 56 • 0,28 47 38 13]O,0 < 0,5 < 10 0.8 < 600 < 1 < 1 < 79 • 1.3 • 2.2 < 36 24 4100 • 5OOP6591 25 39?0 440 • IO0 14 ¢ 10 25 • 10 360 g • 2 5,4 • 2 • 100 14 < 0,5 16 0,10 < 20 140 135,0 2,9 • 10 1,0 • 200 • 1 • 1 • 20 7.7 25.0 77 < 5 240 < 500PA592 >1OO 3600 310 < 100 lg • 10 10 < 10 290 ? • 2 5.0 • 2 • 100 15 • 0.5 33 O.O5 < 20 ;10 501,0 0.8 • 10 1.2 • 200 • 1 < 1 • 41 10.0 28.0 40 • 5 510 • ~O0• 1OOOO 3OO 3200 68 100 62 < 27 340 2 < 8 6.2 • ? • 330 19 < 2.0 69 < 5,60 • 6? 77 4850,0 1.2 < 36 • 2,0 1200 • I • 1 IBO 2.? 7,4 130 21 2500 16OO• • • < < • < • < < • •P6394 < 5 41 • 5 920 < I • 10 65 • 10 200 6 < 2 2.? 4 • 100 28 • 0.5 • 2 2,50 • 20 120 8.6 5.1 • 10 4.2 < 200 1 < 1 • 20 23.0 7.5 4 • 5 • 20O • SOOPAS95 10 6340 120 950 25 • 10 71 • 10 200 19 • 2 4,9 • 2 • 1OO 29 • 0.5 g 0.23 • 20 260 414.0 4,9 • 10 3.6 < 200 • 1 • 1 < 41 20,0 l?,o I00 • 5 • 2~ • 5o0P6596 64 2910 4O0 < 100 20 • 10 22 < 10 ?00 • I • 2 4.1 • 2 • 100 • 5 < 0,5 23 • O,05 • 20 • 10 393.0 • 0.5 < 10 0.4 • 200 < 1 • I < 20 3.0 6.? 939 • 5 440 • 500P6597 24 1660 250 < 100 25 < 10 31 < 10 400 $ • 2 >10,0 • 2 • 100 ? 0.5 I?0 • O,14 • 20 45 1000.0 1,2 < 10 • 0,7 < 500 < 1 • 1 • 57 8.3 16.o 9 11 < 200 • 5OoP6598 7 649 16 750 10 • 10 05 < 10 4?0 10 ( 2 2,6 ¢ 2 • 100 30 • 0.5 29 0.16 • 20 250 349.0 4,4 • 10 3.5 < 200 < 1 • 1 • 20 18,0 8,1 54 ( 5 • 200 • 500P6599 21 45? 3?0 510 12 • I0 27 < 10 240 27 • 2 6.5 ¢ 2 < 100 21 • 0.5 251 1,20 • 20 120 366.0 3,8 < 10 O.7 • 200 • 1 • 1 < 20 17.O 39,0 15 • 5 • 200 • 5ooPA6OO 8 2050 40 < 240 28 • 32 45 • 10 500 • 1 • 2 3.0 • 2 • 100 0 1.2 ?2 • 0.28 • 20 < 2? 1860,0 < o.s • 21 0.9 • 750 < 1 • 1 < 86 1.? • 2,4 • 9 • II 340 • 500PA561 67 3010 G100 2230 >IOOGG < 260 30? 120 10 • 10 630 3 6 6.4 • 2 • 210 44 2.0 323 0.05 20 • 32 3070.0 2,2 < 20 4.5 • 660 < 1 • L • 100 • 1.6 127.0 230 ~ 13 7300 • soo• • • • •PA564 >1OO 434 55OO • 200 9 110 42 ?1 710 1 4 >10.0 • 2 • 100 ? 1.0 65 < 0.72 • 20 • 10 1050.0 3,3 • |0 1,2 • 650 • 1 • I • 97 • 1,7 6,e < 9 20 >20000 < 5oo• • •P6605 >100 326 1910 I70 13 • 24 42 • IO 4?0 < t • 2 0,5 • 2 • 100 14 1,2 1130 < 0.59 • 20 43 942,0 12,0 22 1.8 • 630 • | • I • 93 2,3 14,0 23 20 7200 • 500P6606 • 5 23 35 750 • I • 10 110 16 110 199 2 6.1 • 2 • 100 54 1.3 31 0.32 • 20 190 50.9 26.0 • 1o 9.2 • 200 • 1 1 • 20 5.3 1.9 < 2 6 590 S~OPA607 >loo 232 1970 550 • ? • 33 62 10 620 < I 5 >10,0 • 5 • 100 11 1.3 13 0.79 • 43 23 ;300,0 4.9 < i0 4,4 • 820 • I I 120 2.! 171,0 23 29 5700 Soo• • < < < < < < < • • 5000.0 6.0 • 160 < 3,2 • 4900 • 4 • 3 < 560 43.0 136.0 • $1 < 260 • 1600 • 4800PA~ • 11 981 2030 • 5OO IO1 • 72 90 180 < 300 2 • 8 0,9 < 8 < 310 16 3,0 11300 3.00 120 • 52 3100.o 4.9 < 52 < 3.5 < 1600 < 1 I < 1 °*0 84.7 153.0 • 19 • $3 < 6OO • 23OOPA610 >109 160 1150 < 100 26 < 20 41 < 10 490 < 1 < 2 4.0 < 4 < 100 131.5 274 < o,12 • 20 < 24 1060.0 • o.5 < 26o.0 < 040 < I < I < 04 14.0 33.06 < 26 < 200 < 90oPA611 < 5 96130 < 100 11 < 10 30 < I0 310 2 < 2 8,4 < 2 < 100 25 1.059 0.1o < 20 IOO 423.0 I.l • IO2.8 < 200 ! • 1 • 20 17.0e.0 < 2 12 < 2OO < sooP6612 < 6 1597 320 6 < 10 63 < 10 310 6 < 2 2.0 < 2 < 100 26 0,856 0,19 < 20 200 0o,1 2.1 < lO3,0 < 200 I < 1 < 20 17.05.0 ~ < S < 2OO < 5OOP6613 < $ 2216 550 < 1 < 10 40 63 140 17 < 2 4.5 < 2 < 100 20 < 0.54 1.40 43 170 13.0 zo.o • IOS.2 < 200 < I < I < 20 6.33.7 ? < 5 020 < .~PA614 < 5 166 820 < I < 10 39 44 64 5 < 2 5.3 S < IO0 20 < 0.53 2,20 31 130 3,8 11.o • 1o5,0 < 200 < I < z < 20 6.62.0 < 2 < 5 45O < 5¢0PA615 8 2531 ?40 • 1 < 10 40 00 $6 24 < 2 6.4 2 < 100 19 ¢ 0.54 0.84 24 29o 6.0 9.4 < 106.1 • 2oo < I < 1 • 20 7.o6.2 1o ( 5 760 < 5ooP6616 < 5 9 5 550 • 1 • 10 61 75 ?3 11 • 2 5.2 3 < 100 24 • 0o52 2.60 26 10o 4.4 IO.O < 1o7.7 < 200 < 1 1 < 20 6.26,4 • 2 < 5 51o < 500PA617 < 6 5 8 710 < 1 • 10 46 IS 200 12 < 2 4.2 4 • IO0 20 0.?16 1.40 • 20 200 6,3 3.1 < IO4.2 < 200 4 < i < 20 so.o4,? ,2 < 5 610 < 5O0P6618 < S .S? 5.8 420 3 < 10 110 14 09 0 2 >10,0 2 • 100 54 0.0PA619 >100 110 2540 < 100 19 < 10 31 < 10 200 < 1 • 2 3,0 • 2 < 100 22 2.026 0.63 • 20 170 9fl.6 7.9 < 1o13 0.14 < 20 80 552.0 3.5 < 1o1.0 < 200 < z < Z < 20 19.0 23.0 9 < $ 480 < 5oo4.0 < 520 < I < z < 51 12,0 26.0 4 14 < 200 < 5ooPA620 < 5 91 IO0 < 100 S < 10 50 < IO 140 3 • 2 7.6 • 2 < 150 290.6 318 0.49 < 20 59 116.0 5.2 237.5 < 200 < I < l < 20 19.0 IS,o 6 < S 210 < 90oC15

Appendlx C-.P~ta onla ~ountain$-Ccnalo Hill~ unlt.-contin.no. (~) (f~) (P~) (~m) (~) (~)m) (Pp.) ( ) (~) (p~) Ip~) IPct) (ppm) (Ppb) ( ) (Pp) (ppm) ~Pct) ~pF~) (Ppm) Ipp~) (~p~) IPp~) (Ppp) Ipp~) ~pp~p (P~) Kpl~) Ip~) tP~) (p~) Ippm) ipp~) (~)PA621 ( S 20 75 6~0 2 • 1o 42 < 1o 19oI1 < 2 l.s 3 < 100 22 0,6 72 0,12 < 20 2Yo 61.3 s.5 10I ~ I < 2o 19.o 6.2 ) • 5 < 200 < 5-00PA622 < 5 11 < s 6)o l < lO 11 • lo 34olo • 2 2,9 2 • 1oo 39 • OmS e 1,2o 25 23o z.g 6,c toS9 < 2001 < I • 20 ~0.0 ~ I 6 < s • 200 < sooP~6~ < S tg 6 7~ 2 • to 3s 25 • 5Os • 2 >xo.o 5 < lc~ 19 • 0.5 ~ ~.~0 ~3 ~6 S.~ 2S.C xos,s< ~ooPAd~.4 • 5 132 J200 < 10o 15 < IO 37 < I0 28O¢ < 2 >1o,o • 2 < loo 21 1,o 563 0,14 43 ~S 627.0 3.9 LOy.o ~ 6001 ~ • 60 2~.0 le.o )3 IS 5tO < sooPA625 • 5 369 290 150 8 < lo lO 11 160IO < 2 >10.0 • 2 • ioo 12 1.I 18o o.o8 • 20 • Io 303.0 2.q 10).4 < ~ooI 2 < 20 1~,o l).c 5o Io 260 < sooPA626 >100 3S70 8030 < 2000 468 • 280 370 < 58 < [3008 < 31 5.8 • 33 < 100 29 • 7.6 190 < 0,0S < 270 • 200 >5000.0 • 3.7 2203.3 < 6600< 4 • 760 ls.o 133.c 94220 2200 • 8800PA627 9 36 46O 200 3 • 1o 1o 45 36O3 < z 5,6 • 2 • 10o 7 0.6 31 0.50 4~ 22 27,4 l~.C 1oz, I ~ 200< i < 20 1. I ~s.o 4S ZOO < SO0PA628 #6 88 6230 260 8 • 10 79 • 1o 3302 • 2 1o,o < 2 < 1oo 47 0,8 431 o,11 20 65 287.0 2.4 4L4. i < 200• I < ZO 15.0 s.oS 470 < soopad*29 • $ 11 22 1200 • l < lO 29 31 33OI0 • 2 7.2 2 • IOO 12 < o.5 7 1,1o Ioo 26 5.2 29.C Io~.~ < 2OO• : • ~0 1,z 2.4 lo,o < 2 < 100 < s < o.s 12 < 0.0S 2s < 10 26,7 < O.S 3eo.s < 200• I • 20 0.6 < 0.5 1oo ~rso ~2OO ~92 I~ ~20 66 750 s 15 s.o 20 < 7so s 5.5 ¢~2~ < 5.z0 170 130 >5~.0 2., x3o~t~ • • < • • < < • • •P~633 33 59S 430 270 8 • to 65 1o 280 9 < 2 >1o.o 3 < 100 37 0.5 10 0.40 < 20 1)0 146.0 29.0 • 1o< 10,o 2 < 130 $ 1.4 ]2 o.0s 45 52 1640.0 4.3 < 10PA634 42 >1oooo 653o 250 208 < 1oo< < 100 9910 5310 360 < 483 • |80< < < • • •S.2 ~ 200.5 ~ 000s.~ 200~,2 SSOI.S 9SO( L < 20 ii.o ~.o , 2s 200 • soo~o ~300 ~oo< ~ < ~60 9.o 3S.O + '>~•5 290 < 5OO< L • 2O 1.4 4.2 11• 912.4 I4m0 < 241 17 SF0 < 5,00• 150 2,2 • 12.0 LO,O < 2 < 100 14 < 0,5 14 0.45 • 20 170 69.8 11,0 < IO 3,2~OO• 203.4 3.1 la < S S40 • SO0PA63g • 5 3 18 9~0 • I < IO30 37 i00 6 < 2 5,3 3 < I00 17 < 0.5 23 2.00 < 20 130 1.2 13,o • IO 4.12oo• 203.S 3.6 5 < S 300 < 5OOPA639 < 5 5 42 720 • I • 1ot9 150 160 4 < 2 5,6 2 < I00 II • O.S 4 1.30 22 120 2,1 9.1 • 10 3.120n¢ 203.3 2,6 1o s < 200 < sooPA640 e 3 igo 73O < i < Io22 33 210 S < 2 6,3 2 < 100 13 • 0,5 78 1.60 26 100 1.4 1o,o • tO 3,2~0o• 203.0 2,2 6 s s9o < 5ooPA~I 70 19 400 200 < 1 25IO IOO 3504 < 2 6.6 < 2 < 100 7 < o.S 417 0.67 < 20 90 2e.7 6.g • I0 1.7< 2 ~.5 2 < |oo |~ < o,S 64 0,43 < 20 240 4,9 4.4 • 1o 2.8PA642 6 518 960 < I < IO 34 29 370< 2 5.9 ~ < I00 S < 0.S 35B 0.OS • 20 39 113.0 0.5 11 0.3PA643 |8 3794 II0 3 < IO IO IiO $I04 < • • •7 • 2 6.6 < 2 < I00 II 1.6 402 < o.os 47 74 198,0 2.2 I0 2.4pA~44 21 1289S < 220 6 < 1o 10 05 300•I < s S,2 • 6 < 220 8 1.6 1220 < 0.13 45 47 1300.0 1.0 • 37 0,6PAfi4S 22 46831 < Ioo 32 < 27 ~o < i0 420 • •2oo200z200i+4 ~.o l~ S 2000 < ~o20 20.0 10.0 I; 5 < 200 < SO020 l.g 2.4 ~ S < 200 < SOO20 4.6 60.I 64 S ( 200 < SO0X20 3,1 ISmO [6 39 < 200 ( isooPA646 32 3878~ 440 37 < 35 50 < 10 < |S0 12 < S 5,S < ~ < 100 12 < 1,3 455 < 0.46 66 200 1020.0 1.8 < 31 0.81oooI 11o II.o 21.o s~s izoo < Iooo61 t~O 3 < tO10 ~ 1~ 2~ < 2 $,4 < ~ < 100 1~ • 0,5 1130 • 0.05 < 2o ~0 73.B 2,7 < 10 1,6c i 20 ~s.o 37.0 ~)s Bgo • 500PA648 ~ 18]7 ~40 I < 10IO 22 180 9 < 2 2,7 3 < 100 10 < O.S 390 0.14 < 20 210 28.3 2.2 • 10 1,1c I 20 8.4 34.0 l)s 490 • sc~PA649 17 83SS < 100 8 2410 44 200 10 < 2 4,3 < 2 < 100 < 5 < 0,5 9~50 < 0.12 < 2 o B9 199.0 1+3 • 10 0.520Oc I 20 3.6 31.o Ios 530 < 5o0PA6)O 7 1713 3OO I • lOI0 25 210 9 < 2 1.8 • 2 • 100 7 < o.s 711 0.16 • 20 ISO 29.4 2.2 < 1o 0.9200s 200 • sooPA~SI 41 11110 800 • I 12Io 21 100 10 < 2 7,9 < 100 14 • o,s 463 0,32 26 2s0 s,6 2.5 29 ~,2200c 20 11.0 34.0 16s 260 < sooPA652 15 4430 Z?0 s < Io10 15 120 13 • 2 2,3 < • 1oo 1o < 0,5 746 • 0.11 • 20 260 144+0 2.3 • Io 1.2c 20 B,6 29.0 20s 4)0 < seoPA6S3 < s 921 660 < I • io27 < 1o 8o 12 • ~ 2.2 < < 1oo 13 < 0.5 g74 0.19 < 20 310 9.3 2,0 • io ~.qc 20 ll,O I0.0 ~zs 2o0 < s00PA6~4 15 18126 570 21 < 2S34 15 220 33 < 2 1,6 • < tO0 II • 0,5 170 • 0.27 3e 310 679.0 2,3 • 21 1.9< • 7o 14,o 1o.o 30&5 410 < IL00PA65S 17 7440 4so ~ < lo10 21 170 o < 2 4.0 < < 100 13 • 0,5 416 < 0,05 ~4 310 115.o 3.~ < I~ 1.5~on( 20 i].o i).0 )2s 2on • soop~6S6 Is ~1~ ~so 5 ¢ ~o Io t3 Ioo ~o < I 3.~ • < tc~PA657 • [5 4S97~ • ~40 74 < ~3 II0 • I0 < 4oo ~ • I0 2,9 < 12 < 420Is • 2.e 920 < 0.92 < (x) I~O 2430.0 < 13 < 6q1.5 ~0o< 240 i~.0 22.0 4)~l 3so 3oooPA&58 < S 7411 340 1o • 1o 45 Io < 50 29 < 2 2.S < < 10024 • o.s 2~ 0.64 < ~o 300 05.~ 4+S < LO).ocoo< 2o 16.o 1.9 1~s ~oo • sooPA6~9 < 5 23< 5 96o 4 • 10 56 22 • S0 9 2 2,9 3 < 10020 < 0.5 1~ 2.40 < 20 250 34.6 4.0 < [o1, l 200< 20 23.0 I~.o 3s 200 < sooPA660 18 42< 5 870 8 • IO 10 32 100 13 < ~ 1,9 < • I000 < o.s 2a~ 0.71 < 20 ~60 cs.o 2,~ • noo,~ ~0os 24o • 500PA661 14 516 970 2 < 10 10 20 200 6 < 2 2.2 < < 1007 < O*S 4~3 0.42 • 20 190 i4,0 1.1 • ioo.s• ~on< ~o 6.6 17,0 io5 S00 < sooPA662 7 6611 < 1oo 16 < IO 33 • to < 50 22 < 2 I.~ < 2 < I007 < O.S 160 0.08 ~1 1~o I26.0 1.5 []1.6 < ~oo• 20 ~.a 6o,~ i~s • 200 • ~opA~3 • S 156 ~eo < i • io so ~3 02 IO < ~ 3.1 < Ioo11 • o.5 27 2.10 < 20 260 to.0 4.6 < 10o.~ < 200< 2o i].o 20.0 4s < 200 + sooPA664 9 21< s ~o3 • I0 52 tl0 110 9 • 2 4.1 ¢ lO0 24 • 0.5 13 2,00 < 20 290 37.4 4.1 < io~.s , 200• ~o 15.0 12.n ins 34~ • sonpA~,~5 g 23s2< I00S I~ Io ~6 ~o IS < ~ ~.9 < • Ioo s • o.s 36 o.os < zo ~i ~.o o.~ isnn , ~ot,s LLO0 • SOOC16m mm m m m m mm m m m m m mmm m mmm m mmm mIll - -

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APPENDIX D¸¸'¸4ii .|ASSAYS OF RECONNAISSANCE ROCK-CHIP SAMPLES FROMPATAGONIA MOUNTAINS-CANELO HILLS UNITBY CHEMEX LABS, INC.USING THE INDUCTIVELY COUPLED PLASMA METHODi!i!~'J, 1, "ElementDetection limit [lower/upper (if applicable)]!i{ . ~i!ii! .....;iii~ I'Ag (silver)AI (aluminum)As (arsenic)Ba (barium)Be (beryllium)Bi (bismuth)Ca (calcium)Cd (cadmium)Co (cobalt)Cr (chromium)Cu (copper)Fe (iron)Ga (gallium)Hg (mercury)K (potassium)La (lanthanum)Mg (magnesium)Mn (manganese)Mo (molybdenum)Na (sodium)Ni (nickel)P (phosphorus)Pb (lead)Sb (antimony)Sc (scandium)Sr (strontium)Ti (titanium)TI (thallium)U (uranium)V (vanadium)W (tungsten)Zn (zinc)0.2 ppm/200 ppm0.01%/15.00%2 ppm/10,000 ppm10 ppm/10,000 ppm0.5 ppm/lO0.0 ppm2 ppm/10,O00 ppm0.01%/15.00%0.5 ppm/100 ppm1 ppm/10,000 ppm1 ppm/10,000 ppm1 ppm/10,000 ppm0.01%/15.00%10 ppm/10,000 ppm1 ppm/10,000 ppm0.01%/10.00%10 ppm/10,000 ppm0.01%/15.00%5 ppm/lO,000 ppm1 ppm/lO,000 ppm0.01%/5.00%1 ppm/10,000 ppm10 ppm/10,000 ppm2 ppm/10,000 ppm2 ppm/10,O00 ppm1 ppm/10,000 ppm1 ppm/10,000 ppm0.01%/5.00%10 ppm/10,000 ppm10 ppm/10,000 ppm1 ppm/10,000 ppm10 ppm/lO,000 ppm2 ppm/lO,O00 ppm!D1

Appendix D--Assays of reconnaissance rock-chip samples by Chemex Labs, Inc.using inductively coupled plasma-atomic emission spectroscopy method(Patagonia Mountains-Caneto Hills Unit)[, greater than;, underlined equals"samples re-assayed at higher detection limits": a) *, re-assay results in troy ounces per short ton (rerun by fire assay); b) %, re-assay results in percent (rerun by AAS).Samite Ag AI AI 84 Be B~ Ca Cd Co Cr Cu Fe Ga Hg K La MQ Mn Mo Na NI P Fb Sb Sc Sr "i3 T] U v W ZnN~er (ppm). (Pet) ()) (~) (;)) (pp~11) l~pct ) (P~}, (Ppm) (P~) (Pp~) (Pct) (~) (p~) (Pet) (ppnl) (pct) (pp~) (Pp~) (pet) (~) (pp~ (pp~) (~pm) (pp~) {p~) (Pet) (~) (PP~I (P~I (PP~) (~?PAOOI < O.2 3.17 • S 1120 < 0,5 < 2 O,30 < O.5 2;' 20 104 6.13 10 • 1 0.83 • IO 1.41 29OI 0.0627 850 16 < 5s s] 0.03 < ~0 < I0 sz)o 60PAOO2 0.2 2,13 < 5 2()0 • 0,5 < 2 0.05 0*S 5 7 191 8.76 10 < I 0.53 < IO 0.39 85PAOO3 < 0,2 2.01 • 5 2550 • 0,5 8 5.68 1,0 II 39 277 4.62 20 < 1 o,83 1o 0.21 11801 0,08I 0.038 < 10 I8 < 523 1430 36 3S3 25 o.oS < lo I0 e?e 151 0.05 < 10 • I0 1145o 5220 68PAO04 10.4 0.15 < 5 3620 • 0.5 < 2 0,48 1.0 • I 254 4157 I,OO • I0 • I o.o1 • IO o.oi 2O40PAOOS s. 48..~* 0.09 335 49O < o.s 2i~ 2.01 > ~.0~ .o9 97 2769 1.70 tO • t o,o3 20 0,¢5 ~3~01 0.019 < o.ol6 450 8 153 660 I~.I~L ~55I 60 o.oi < IO < Io3~ < 0.01 ¢ I0 ~oe 1o 26PA~ 61.0 0,14 00 1030 • 0,S 10 1,40 >I00* 0PAOO7 9.0 0.Ba 10 $40 < 0,5 < 2 0.30 9.5PAOO8 1,0 2.44 35 10o 0,5 IO 0.24 6.0) 142 676 2,o9 10 • I 0.07 20 0*45 10107 69 194 4.31 • 10 • 1 0*49 30 0,15 32037 33 216 3.63 io < I 0.42 40 1,3~ 29053 < 0.01 3 320 2.6~'~ t409 0.O2 II 570 3564 153 0,01 32 320 118 < 5I 64 < o.oi3 63 < o.oi4 19 < o.oilO I010 ~ 10I0 < I02 IZ0 6.571~o IO )a2e34 zo ~so4~oo9 ~.6 0.$* 120 e3,0 < o.5 6 0.06 2.~3 69 131 3.S~ tO < I 0.2~ 1o 0.03 9O65 < ~.o1~0 202~ ~o ~02PA010 30,4 0,49 205 200 1.5 < 2 0,6S 20,016 104 564 5.24 IO 1o 0.26 20 0.52 40?59 o.oz 28 sgo 0.96",'~ ?oI? < o.olI0 c I0PA011 3.0 0.41 35 ~90 1.0 8 0,1) 4.027 70 91 3,45 < 10 2 0.253O 0.10 SlO5 0.02 35 650 466 Io2 21 O.OII0< I0Is IO 608PA012 35.0 0,62 70 1510 • 0.5 B 4.99 49,521 122 233 5,30 1o $ 0,2630 2,85 9100S o,o2 2? 680 2.30¢ 352 ~3 0.01I0 2015 20 1,46~PAOI3 1.6 1.7S 5 ~.10 0.5 4 4,~S 1,5PAO14 8.8 1.28 50 32O < 0*S 2 0.14 2.0PAOI5 1.8 1.59 45 400 • 0.5 1o 0.F0 < 0,.~;~ ~5 126 4,79 2O 1 0,315 183 139 2,99 20 20 0.328 64 326 4,91 1o < I 0,3460 2,09 160010 0,12 24040 0.~8 2252 0.03 41 I0~o 504 to13 0.02 Ig 430 1436 1206 0,01 6 500 204 S9 50 0.02 ~ Io • I02 ~88 O.Ol 10 ~ I02 101 o.oz I0 < I0~o~ • Io a5635 < Io 44023 < I0 244PA016 12,6 O.85 45 • IOOOO < 0.5 < 2 2.59 >I00,O < 1 95 7640 1,18 < 10 < I 0,32IO o.1s 1o55 o 0.03I 200 • ioooo < sI 341 < o.olI0 < I0 l0 40 >10oooPA017 ~*~ 2.50 • S 250 • 0,5 < 2 1.45 3.5 < I 10 2037 2,74 10 • I 0.6130 0.9~ I~1O 31 0.04I 610 > 1oooo 1o1 317 < o.oi1o c lo 23 lo 3192PAOI0 < 0.2 2,71 80 430 • 0.5 • 2 0,03 < 0.S < 1 23 ISS 8.15 • 10 < I 0.10 • IO 0*035o 9 o.oil 10o 106 < 5: 125 0.07lO • 10 Z60 )o 76PA019 ( 0.2 2,75 260 740 • 0.5 19 0,16 2.S • I 71 152 >15.00 20 < 1 0,64 < 10 0.2820 ~ o,IoI ~I0 54~ IS4 )~2 < o.oi1o • IO ~49 so 370PA020 1,0 0.43 130 lgO • 0.5 < 2 0,O2 3,0 • I 117 140 3+79 < 10 < I ¢ o,o1 < 1o • O,Ol45 tO o.nli 330 3?6 ;oI ~5 < 0.011o < 1o zo < ~o )~2PA02~ 1,~ 1.94 ~5 2070 < 0,5 < 2 7,99 • 0,~ gPA022 2.0 1.83 40 450 < 0,5 10 0,05 • 0.5 1PA023 0,6 O.51 I0 1020 < 0,5 2 0,03 < 0.5 < IPA024 42.4 0,$3 300 260 • 0.5 < 2 0,51 3,~ SPA02~ 20.6 0.60 45 430 < 0.S • 2 0.Oe 1.0 3~) 60 2.53 40 ( I 0.64 50 0.2) 1935 1 0.0331 91 2.26 10 3 0.28 10 0.01 ~os 6 0.0320 46 1,24 < 1o 5 0.04 < 1o o.oi 215 8 0.0256 1963 3.13 • 1o o 0.35 < 1o o.14 240 17 0.0232 115 1+59 < lO • I 0,40 < 10 0,04 95 13 0.026 STO 3~0 ~0l ~90 iI~o s1 140 232 5I I~O 6326 e4s1o Ioo 2.141 553 190 0,01 < IOI 191 0.01 I0I 12 0.01 < lOI IS O.OI < SO: I~ o,oi < Io1o 27 io t)oio 46 Io 2oeto ~o < Io IsoIO II lo $16Io I~ 2o 234PA026 104.8 1.23 320 39O • 0,5 < 2 0,40 >100,0 24PA027 21,6 3.60 130 170 • o,$ < 2 0,20 • o,~ 1126 ~20 ~,17 < 10 I 0,59 IO o,31 2.~0'~, ~o 0.0339 315 >IS,00 20 6 1,13 20 0.73 2545 4 0,06t) 3eo 6.9~,._._~ 330~)o Zl~O 304 ~2 0.01 < ]oo ss 0.02 < ~oIo 2~ 60 I.~L.~XLo l~e < so [2SOPA02O 73,6 1.29 145 850 • o,s 6 0.52 14.S 19PA029 19,0 1.34 60 680 < 0.5 2 0.36 • o,S 32144 5.19 • 10 I 0,~0 I0 0.14 2930 49 0.037 880 3,24...~ 22511 322 4.04 10 < I o.g4 2o O.lS 340 ~3 o.o~ < I 940 1846 305 32 o.oi • Io2 43 o.ol < IOIo )~ 1o 2376IO 29 I0 ol2PAo30 I0.6 2.36 60 190 • 0.5 12 0,63 < O.S 1421 710 3.09 IO < I 0.96 10 0.33 640 45 0.03 1 730 7165s 22 o,oi < IO10 48 I0 774PAO)I 15.4 2,01 120 600 < 0.5 • 2 0,93 4*$ 3317 1056 S,06 10 2 0,91 30 0,53 1940 22 0.04 I1 1090 3144S5 42 o,oi < LO|0 49 :0 ]2)2PA032 IS,6 O*99 205 320 • 0.5 • 2 0,21 19.5 243 394 S,79 < 10 < I 0,47 20 0+17 I,SSY, 19 ¢),04 L4 700 ~970905 ~o o,oi < ioIo 3o zo 6450PA03) 22,0 1.33 225 410 • 0.5 < 2 0,18 19,0 3213 423 0.~5 < 10 < I 0,77 20 0,14 9225 12 ¢%06 6 860 9220509 53 o,oi < IoIO ~ 20 SOSOPA034 8,8 1.03 45 510 • 0,5 • 2 O,lO • 0,5 IPA035 10.o 1,63 45 1220 < 0,5 • 2 0.56 0*5 1561 17 2.00 < 1o < I 0.?I < to o,os 65 4 rl,03 < I 180 190$o 176 2.32 10 • I 0.78 < 1o o,27 1255 e O.04 < I ~50 878:05L 6t o.oL < ]oz 32 o,oi • loLO le 1o 454D2m m m m m m m m mm I_ n m m m m m m m

RImmmm Bm mm mAppendix D-Patagonia Mountains-Canelo Hills Unit -eontin.~8¢0~0 Ag AJ All Ba Be t~l Ca Cd CO Ct Cu Fa Ga Hg K La Mg Mn Mo Na Ni P Pb Sb S¢; Sr 11 TI U V W Zn(Pp~) (Pet) (Pp~) (Pp~) (Pp~) (PI~) (Pet) (Ppm) (Ppm| (Pp~) (Pp~) (PCtp (PF~ (Pp~) ~pet~ (Pp) (Pct~ (Pp~ ~ppm 1 IPctp ~Ppm~ IPpm) ~Ppm) ~Ppm) IPpm) ~Pp~) (PCt) (P~) (PP~) tP~) {~) (PP~)PAO~ 1.2 2,80 20 400 < O.S < 2 1,14 |.0 24 123 66 5.06 20 < 1 0,67 40 1.81 2370 2 0.09 51 1210 204 s s 56 < 0.01 < 10 < 10 72 LO 370PA032 4,0 2.77 35 030 < 0.5 < 2 3,67 < 0.5 IS 119 156 3,17 30 5 0,80 50 1,22 2350 5 0,05 42 1200 220 15 6 74 < 0.01 < 10 < 10 72 20 3O4PA030 46.4 1,31 295 1070 < 0,5 < 2 0,S3 16,0 30 39 489 6,24 10 < I 0,59 30 0.45 1,55"~ 0 0.02 56 ]26o 6986 85 4 49 < 0,01 < 10 < 10 29 10 4168PA039 2.4 1,49 35 870 1,5 < 2 >15,00 < 0,9 6 25 72 2,$6 70 < I 0,20 60 1.15 1530 3 0,03 3 400 24 10 3 125 0,01 < 1o < 10 54 30 820PA040 77,4 1.35 120 2270 < 0,5 < 2 0,03 < 0,5 5 62 240 5,76 10 1 O,OS < 10 • 0,01 15 1 0.02 9 140 978 100 1 624 < 0.01 • 10 < 10 20 < 10 144PA041 22.0 O,BO 190 1420 • 0,S 10 0,04 0,9 3 78 57 1.92 10 2 0.38 • 10 0,02 35 82 0.04 • I 420 1330 20 1 440 < 0.01 < 10 • 10 25 10 62PA042 5,0 0,56 25 620 < 0,9 4 0,04 • O.S S 116 )4 1,17 < 10 < 1 0.11 • 10 0,01 20 3 0,03 3 210 618 5 < I 120 • 0,01 • 10 < 10 6 • 10 46PA043 15.60.95 75 1270 < 0,6 < 2 0.09 7,3 7 46 1333 4.25 10 3 0.46 • 10 0.03 155 22 0.02 1 $00 2452 20 2 297 • 0,01 • 10 < 10 11 10 3648PA044 3,0 |o40 75 700 < O.S < 2 0,39 10.5 16 . 7 105 3.26 < 10 < 1 0.87 20 0.12 4670 9 0.02 3 IS30 1460 S 1 76 • 0.01 < 10 • 10 lO I0 3036PA04S 13,8 0.73 70 2210 < 0.5 • 2 0.05 < 0,5 ! 53 $0 1.fl3 < 10 5 0.29 < 20 0,04 145 4 0.03 < 1 200 672 S 1 117 < 0.01 < 10 < 10 20 < 10 80PA046 25.4 1.03 290 5900 < 0.5 IB 0,13 1.5 6 71 140 5,51 20 < 1 0,46 < 10 0,15 210 7 0.06 < I 410 1150 55 1 217 • 0.01 < 10 < 10 52 20 134PA047 9.05~ ~ 0,36 330 1190 < 0,5 42 0.05 22,5 6 98 1506 4,25 < 10 9 0.20 < 10 0.02 110 9 0.02 • I ZOO 1.761 1350 • 1 726 < 0.01 < 10 < 10 5 20 3940PA040 3.4 0.72 20 1350 < 0,5 6 0,06 O,S < 1 6 20 3.91 10 < 1 0,01 40 0.05 65 6 0*05 < I 9OO 1330 S 1 166 • 0.01 < 10 • 10 17 10 390pA049 10,2 0,93 25 6050 < 0,5 12 0,07 3,S 12 0 352 3,02 10 2 0.67 20 0.14 2100 2 0.06 8 500 2338 5 2 108 < 0,01 • 10 • 10 20 20 835PAO50 2*4 0,93 30 760 < 0,5 < 2 0,34 5,0 17 13 148 S,$7 10 1 0.66 20 0.12 720 | 0.03 22 1250 576 10 4 39 • 0,01 • 10 < 10 25 10 1426P6051 1,0 2,15 3O 980 < 0,5 < 2 2,00 2,0 27 36 103 $,07 30 < I 0.82 30 1,92 4280 < I 0.03 45 1400 310 5 7 54 • 0.01 < 10 < 10 97 20 1232PA052 13.8 h94 50 1110 < 0,5 6 0,$7 20.5 25 20 204 5,09 10 2 0,72 20 1,04 259O 3 0,03 52 980 2850 5 6 44 0.01 • 10 • 10 71 30 4256PAOS~ 13,2 1,75 40 3420 < 0,$ < 2 1,21 0,$ 27 21 206 4.5$ 10 4 0.07 10 0.61 2030 37 0.02 37 1230 3686 S 5 87 < 0,01 < 10 • 10 46 20 1700PAOS4 0.0 1,03 5 2660 < O,S < 2 1.00 11,S 25 19 274 5.74 10 < I 0,96 20 0,05 6425 15 0,04 54 1490 2306 10 5 02 < 0,01 < 10 < 10 46 20 3090PAOS$ 10,4 0,13 2$ 4170 • OoS 4 0,02 O.S 4 165 55 2.34 < 10 < 1~ 0.08 < 10 0,01 570 4 0.02 7 190 990 25 < I 74 < 0,01 • 10 • 10 4 l0 250PAOS$ 16.4 0,05 SO 7920 < 0,5 < 2 0,60 2,5 5 5 47 3,90 10 < 1 0.59 10 0,O9 105 2 0.03 < 1 760 2478 20 1 241 • 0.01 • 10 • 10 12 10 1768PAO$7 4S,4 0.49 |OS 2610 < 0.5 < 2 1,22 >190,0 6 30 151 2*52 10 0 0,25 10 0,53 2710 16 0.02 1 110 1.601 5 1 196 < 0,01 • 10 < 10 8 100 4,67~PA050 18,9 0.10 120 690 ¢ O.S 20 0,04 5,0 13 205 314 4,43 10 • I 0.90 < 10 < 0,01 25 8 0,01 27 O0 2318 260 • 1 193 • 0,01 • 10 < 10 5 < 10 1294PAOS9 119o0 0.73 275 1300 < 0,5 14 O.Q15,00 10,0 16 25 3945 5.07 70 < I 0,25 30 0.29 7,COY, 19 0.03 18 300 2.34% 2760 4 1079 < 0.01 • 10 50 238 < 10 718PA074 51,80-- 0,75 780 3280 < 0,5 • 2 4.58 11,0 66 27 9951 14.56 20 < 1 0,50 20 0.13 15.20¢ 14 O.OS 43 590 2,96% 4155 8 2579 • 0,01 • 10 110 78 • 10 1524P6079 32.2 0,45 170 2030 • O,S • 2 0.70 2.9 41 105 1043 0,70 • 10 < I 0.22 < 10 0,04 10.001 44 0,02 11 200 4.161 200 3 174 • 0.01 10 60 34 • 10 1732P6076 133,0 0,$6 199 > 10000 1.$ 72 2,15 $,0 54 40 445 14.03 10 < 1 0.36 10 0.16 16.201 57 0.03 25 200 6208 65 4 408 • 0.01 • 10 100 42 • 10 1782PA077 . 25,4 0,21 090 100 • 0,5 $4 0,34 46,0 11 41 4470 >15.90 < 10 < I 0.04 20 0,07 1085 65 0.01 0 630 5854 25 3 15 0.01 20 • 10 41 < 50 1.111P6070 72,4 0,73 70 40 1,0 • 20 O,BS >100,0 59 46 14,00111,83 20 < I < 0,01 110 4,49 6530 9 0.01 18 1200 1444 5 8 8 0.02 • 10 < 10 26 600 4.21~PA079 3,4 0,26 35 20 • O,S 24 >15.90 39.0 3 81 17~9 >15.00 60 < I < 0.01 50 0.10 15~0 5 0.02 6 190 46 5 2 23 0.01 • 10 • 10 13 50 244203

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1o 140PAl?S 4.0 0.29 3520 • O.S 1o 0.02 5,5 S 250 75 4.17 • lO 5 0,12 • 10 • 0,01 4514 0.0~ I~ I?0 1185 I 2g < o.olIOLO 21 I0 332PAl76 4,6 1,20 < 5~0 < o.s 6 0.02 19,5 17 Sl 24 5.58 < lO • I 0.69 • 10 0,01 4o3 0.02 is ~?o 21~5l 10 < 0,01 ~0]o 12 io 2S4PALT? 3.0 0.98 1o20 < 0.5 • 2 0.02 0.S 13 206 313 2.2? 10 1 0.51 < 10 < 0,01 400,02 l; go ~o~I 15 < 0.01 i0lo ~0 I0 lZZPAI?S 4.0 1,27 5PAI?9 3.6 0,13 4030 < 0.S 14 0,o2 2,0 19 143 642 3,20 • I0 2 0.58 < IO < o,oi 503O < 0.5 6 0,02 O.S 12 429 65 2,40 < 10 2 0,03 < 10 < 0.01 8020 0,03 L3 80 242L4 0.02 ]8 120 t685zoI 12 < 0.01 tOI 5 < o,oi ioIO Lb 1o 168to < ~ IO Z56PAISO 3.2 0,9~ 8040 < 0,5 30 0,02 3.0 21 129 257 4,90 10 • 1 0.44 < 10 < o.01 500,02 ]5 90 2865I ls < o,oi lo~o ~ 1o 234PAIOI 6,8 1.09 6S290 < 0.5 < 2 0.03 >100.0 17 233 80 3.08 1o 1 0.46 20 0,05 13512 o,o~ L7 440 1778SI 16 • o,ol ~oI0 13 • I0 3914PAIOZ 6,4 1,~ ~99o < 0,5 < 2 o,02 25.0 46 116 ~41 e.gs < to 3 0.52 I0 0,03 tlO• 6 0,02 I~ 11~ 30¢I 6 < o.ol 1o~o 6 < ~o 3o44PA183 1.9 1,09 12500 < 0.5 • 2 0,02 8,0 16 105 110 2.40 • 10 • 1 0,5? 20 o,0s 2158 0.03 13 Iio 266I ? < o.ol Io1o 7 < IO 2110PA184 4.0 1,42 42070 < 0,5 < 2 0,02 12,5 18 133 571 2,33 10 9 0.62 30 0,06 225; 0.03 le 270 Sses1 13 < o.ol~o ~o io < io 30~4pales 2,0 1.94 9030 0,5 • 2 0,02 11.0 20 119 211 1,81 |0 16 0.70 30 0.07 32O2 0,03 16 420 204S2 e < o.oi[o io ]~ < io ~446PAl86 1.2 2,22 3570 1.0 4 0,02 94.0 31 132 410 3,30 20 19 0.65 30 0.11 13056 0.03 12 670 3~42 15 < o.oi1o 60 13 • 1o 1766PA187 2.0 2.19 6090 0,$ < 2 0,02 2.0 14 102 192 ~,11 10 3 0,54 20 0,14 94555 0.03 4 610 8161oI 14 < o.oi10 lo 20 < I0 1366PA108 2.6 1.24 9S40 0,S 4 0.02 14,5 13 119 59 1,98 10 < I 0,50 20 0,08 4856 0.03 16 200 ?62SI 6 < o,oiIO IO e < Io 2d94PA18"9 6.4 0,46 20540 < 0,S 46 0.25 1.$ 14 257 3O43 >IS,00 • I0 3 < 0.Ol < 1o 0,12 ll?S16 0.02 5 300 3642 13 < 0.o1Io Io 34 2oo 1234PA190 15.0 0.53 3403O < 0.5 140 0,54 4.0 33 209 2.52% 11,47 < I0 < I O.01 < 10 0,10 2400is 0.02 21 400 7782SI 16 < o.oiIO IO 2] 40 2492P~|91 2.4 ~,30 < SSO < 0.5 ¢ 2 1,3r0 O,S 21 65 591 7,52 < IO < 1 0.11 20 2.~4 ~0000,O2 Io 750 116 s231 o,I?1o < 1o 29 < 1o ~6~PAl92 11,o0__.__~* 0,94 460110 < 0,5 1094 0.29 >100.0 161 160 4834 4,62 < 10 • I 0.o0 IO 0,69 36808 0,02 14 840 11.40% 10301oo.oiIo < IO io 240 20.20~cP~193 59,90.._...~ ~ 0.26 >10o0040 < 9.5 1340 0,06 >t00.0 17 116 t5,?0~>tS,00 < 1o 26? 0.07 < 10 0,04 1990L0 O,Q~ 15 • ~oo 6414 9,3~r,4 < 0,01L0 • to z~ < 50 2,16"~.PA194 113.~ 0.16 46520 < 0.S 62 0,05 10.0 14 350 2174 >15.00 • 10 5 < 0.01 • I0 0.03 19oII o,o2 19 So I,O~F, 15153 < o.o11o < IO 5 • so a13oPAl95 I0,~o.~" 0.06 920180 < O,S 119 O,OS >100.0 12 40 7739 2,77 • 10 10 0,01 • 10 0,o2 6103 0.02 5 280 69.30% 366S4 < O.OIIo < IO 2 120 6.0~#,PAl96 19,4 o.?~ 17o120 < 0.5 12 0,09 < 0,9 16 130 1774 3.00 < 10 6 0,40 < 10 0,0l 309 0.03 I~ ~0 94 2516 < O.Ot < I0 • 106 < IO 126PAI97 12.8 O.g3 05420 ¢ 0,5 2 0.02 < 0,5 19 230 324 0.71 < 1o 20 0.31 < 1o < o,oi 30e 0.03 zo 70 92 30~2 < o.oi < 1o < IO6 < Io 40PA190 2.e 1.89 s1oo < O,S 0 0.02 < 0.9 < I 153 4? o.g? lO 3 0.76 < I0 0,03 IS6 o, lz 10 40 94 SI~ < o.oi < Io < Ioio • IO I~PAI~9 8,2 1.11 1959PA2OO 2,0 0.5~ 116017o < o,5 < 2 0.02 < o,s 9 119 2969 6,26 < 10 • I 0,44 10 0+02 )050 < 0.S 4 0.02 < O.S 9 118 210 s.7s < 10 • 1 0.27 < 10 0.01 1515 O.OS 6 60 40 6920 0,03 < L ~o Io 70106 • 0.01 • lo < Io]~ < o,ol < io < IO21 ~ 1o 32PA20| 3,0 1.21 3770180 < o.5 1o 0.o2 < 0.S S 113 309 11.46 < 10 I 0.60 < IO 0.04 4044 O,O3 • I II0 3O 953? < o,ol < Io < IO45 • IO 32P~20~ 2.~ 1.~O 232OPA203 3.0 1.94 125PA204 I0.e L.23 390PA20$ 6,B 0,86 169170 • o.s o ~,o~ < o.s s 13u t~ ?.S~ < Io ~ O,eo • ~o o,~ soJ40 ¢ 0,5 16 0.02 < 0.5 • I 128 147 0,94 10 < I 0*82 • 10 0,04 40490 < 0,5 42 0,o2 < 0,5 ? 136 844 0,94 10 10 0,62 • 1o o,o? 600o < o,s 22 0.03 < o,s 12 2S6 390 2.69 < 10 s 0,19 < 10 0,01 3527 o.o~ < t 8~ s~ ~56 0,06 • I 50 98 1o4 0.03 ~ ro 54 ~0to 0.03 ~9 so 58 ~o24 < O,Ol < Io < Io21 < 0,01 < IO < lo44 < O.OI < LO ~ 1o31 ~ ~O ~616 < Io 12tl < 1o ~4PA20~ 2,8 1,39 6S70 40.S 2 0,02 • O,S IO 18o 125 1.14 1o 4 0.65 < 10 0.05 45s 0.05 6 ~o 62 s25 < O.OI < ZO < toIo ~ IO z2PA20? 10.4 0*66 200PA200 S.6 1.09 19SpA20O 0.2 1,o? 3910 < o.s 0 0.03 • 0,9 30 249 394 9,23 < 10 20 0.o9 < lO • o,ot 3060 < o.s 210 0.03 1.0 14 260 604 2*46 lO 9 0.24 10 • 0.01 4580 < 0.5 < 2 < O,Ol < 0.5 • 1 1 155 2,45 • 10 < 1 0.51 < 10 < 0,01 514 o.n2 I~ ~0 66 4s16 0,o5 1o ~9o L~6 60IO 0.02 < l 160 22 < 522 < o,ol < lo - in03 < o.ol < Io Io46 < O.Ol < ]o LO< to 30I0 • Io 42le < io bD6H H | | H | | H H i i i mini m i m

F---mm m ibm im mmm m mm m mm mmAppendix D-Patagonia Mountains-Canclo Hills Unit -contin.Sample Ag AI AI Ba Be BI Ca ca Co Cr Co Fe On HQ K La Mg Mn Mo NO NI P Pb Sb SC Sr 1] Tt O V W ZnNUt11Dep (Ppi11) (i~t) (Ppffi) (Ppl'~) (Pp111) I[ppm) (Pet) (P~el) (P~) (P~) (PI:~) J[P¢:t: ) J[Ppflt) J[Ppm) q[PCt ) (P~) (Pct.~ ~PF~I~ IP~ IPCtl ~Ppm~ (Pprn~ (PIpm~ lIPS) ~PDm) (Pp111) (PCt.) ~P~111 ) (Ppm) ~Pp~ (1~) ( P1D(111PA~I0 4.4 1,94 560 120 • 0,5 < 2' 0.02 < 0*S • 1 73 728 4.78 • IO • 1 0,72 • 10 0.023S 1~ 0.07 • I 14o238 45 1 50 < 0.o1 • 10 IO 16 40 32PA21I O.2 1.04 3705O • 0.S • 2 0,01 < 0.5 • 1 15 547 S,05 • 10 < 1 0.55 < 10 O.011o 12 0.04 < I 9060 30 ,,: i 2,0 < 0.01 < 10 < 10 2,7 < 10 4PA212 1.4 1.14 00SO < 0.S < 2 0.01 < 0.5 • 1 13 8'97 2.90 • 10 < I 0.59 • 10 • O,011o 8 0.04 < I 60102 15 • I 23 < 0.01 • IO < 10 IS < 10 6PA213 0.6 1.41 OSS40 • 0.5 < 2 0.01 < 0.5 2 10 673 5,38 • 10 • I 0.55 • IO • 0,015 7 0.02 • I 90150 SO < 1 35 < 0.01 2,0 10 39 10 4PA214 0,6 4.37 045110 < 0.5 • 2 O,02 • O.5 0 22 1951 12.92 10 • 1 0,54 • 10 0.021o 72 0.04 • I 2,1oIOO 55 2' 5~ < 0.01 • 1o < 1o $1 SO 12,PA215 0,0 1,23 3540 '< 0.5 • 2 • 0,01 < 0.5 • I 112 5950 2,73 • 10 • 1 0.55 < 10 • 0,0119 s 0.02 1 < 1o32 IS • I 2,3 • o.01 < 1o 1o 10 • IO 2PA215 0,4 1.46 3540 • 0,5 • 20 • 0.01 • O.S 28 80 >10000 4.68 • 10 • 1 0.57 • 10 < O.0120 e 0.03 0 < 20024 < 5 < 1 24 • 0.01 < 10 IO 7 < 50 2,PA212 2,0 " 1.32 12030 < O.5 • 20 < 0.01 < 0,5 14 117 >10000 4,37 • 10 < I 0,52, < 10 < O,Ol2,0 2 0.02 9 • 2,0020 15 • 1 2,2 • o,o1 • 1o • 10 5 • 50 • 2PA218 5.0 I,BO 23O40 • 0.5 • 2,0 0,01 < O.S 20 102 >10000 5o55 IO • I 0.64 • IO < 0,Ol2,0 13 0.03 5 < 2,00104 5 1 36 • 0.ol • ;o < 10 9 • 50 2PA219 0.6 1.24 15020 • 0,5 20 0,01 • 0.5 • I 177 913 4.73 • IO 2 0.32, < 10 • O.012,0 13 0.03 5 70122, 40 < z 48 • 0.01 < 10 30 14 30 2PA220 5.8 1,50 IS1030 • O,S 2,0 0,O1 < 0.5 IO 72 >1oooo 5.20 < IO 2, 0.52, < 10 • 0,0115 7 0.04 3 < 2,0030 9O 1 21 • 0.01 • tO 10 S • SO 6PA221 2.8 1.42 24010 ,¢ 0.5 40 0.03 < 0.5 2 117 • 10000 3,05 < 10 • 1 0,32 • 10 O,Ol30 16 0,02 < I • 2,00 30lS.O0 3O • 1 0.10 10 O.O2Io 113 0.06 < I 480396 170 3 56 0.02 • 10 10 30 1014PA235 1.0 0.29 505 40 < O.S • 2 0,01 4,5 • I24 353 4.90 • 10 2 0.01 • 10 < 0,011o 39 0,02 5 1oo21 50 • 1 11 • 0.01 < 10 20 14 • 106PA236 1.6 O.67 55PA237 2.0 0,60 135PA230 3,0 O.B6 460PA22"9 0,4 0.50 120PA240 O,B O,26 73620 < 0.S 28 0,01 l.S370 • O.S 24 8.01 3,O100 • 0,5 4 0,01 4.0190 < 0,S • 20 • 0.01 2,0610 < 0.S 22 • 0.01 • 0.519 10 450 3.57 • 10 1 0.09 < lO < O.Ol2 29 324 3.00 < I0 < 1 0.11 < 10 • O,01I 05 970 1.62 < 10 3 0,11 10 O.018 IO 1,07~. 3.21 • IO < I 0,12, • 10 • 0,014 22 924 3,70 • 10 2 0,02' • 10 • O,0120 1o 0,02 26 402,0 1o O.OZ 5 < 1o15 20 o. 13 6 16015 7 0.02 10 • 20015 2,4 0,02, 11 • 1o40 < 5 < I 11 < 0,OI < 10 30 7 < 10 2O8116 IO < I 8 < 0.01 < tO < IO 13 < 10 2222110 440 < 1 70 • 0,01 • 10 |O 4 < 10 12'39 < 5 < I 6 < 0.01 < 10 2,0 e • 50 7218 • 5 < 1 S • 0.01 • lO • 10 3 < 10 2,6PA241 2.6 0,24 075 10 < 0.8 12 0.01 4.5 < I 21 910 7,70 < 10 < I < 0.01 • IO < 0,01PA242 2,4 O.70 |2$ 170 < 0.5 14 • 0.01 1,0 < 1 34 190 3,34 < 10 2 0,22 < 10 < 0.01PA243 0,4 O,S2 < 8 580 < 0,$ 2 < 0,01 h0 5 ][6 97 2,47 < IO 1 0.24 < 10 < 0,OIPA244 2.6 1,02 320 110 • 0.8 52 0.01 2.0 2 43 196 3.70 • 10 • 1 0.13 < 10 • 0.01PA243 3,4 0.24 40 1040 • 0.6 24 • 0.01 • 0.5 • 1 39 2720 3.53 • 10 23 0.02, • 10 • O,0110 ee o.ol 4 ~ 2015 12 0.02 6 40I0 9 o,o1 11 2,013 40 o. 1S 5 15030 2,4 0.03 4 < 1050 6O • 1 12' • 0.01 < 10 10 7 < 10 810 < 5 < I 18 • 0.01 < 10 < 10 14 < 10 1424 < 5 < 1 B < 0.OI < IO < 10 4 < 10 42,12,0 5 < 1 54 < 0.01 < 10 < 10 14 < 10 B42 < 5 < 1 13 < 0.01 • 10 10 4 < 10 12,PA246 1,0 0,46 < 5 70 < O,5 < 20 O.O1 l.S 12 36 0,9411. 4,14 < 10 < I 0,10 < 10 < O.01PA241 2.2 O.43 50 70 < 0.5 42 0,01 < 0.5 < 1 33 2054 3,16 < 10 < 1 0,o5 < 10 < 0.01PA248 1.4 0.40 165 10 < 0,5 12 0.01 2,0 8 90 3041 4.93 < 10 • I 0.01 < 10 < O.OlPA249 1.6 0,55 10 350 < 0,5 6 < O,O1 < 0.S 3 25 1249 3.58 < 10 1 0.00 < 10 • o.o1PA2SO 1.6 0.20 65 1000 < 0.5 14 0.01 < O.S 20 45 0270 5.90 < 10 < I 0.01 < 1o < 0.012,5 19 0.04 14 • 20045 15 0.03 9 3055 12, 0.04 17 1o2,0 7 0.02 7 1o40 2,0 0,02 26 1018 < 5 < I 2,2 < 0,01 < 10 10 1 < 50 12,4 < S < 1 22, < 0.01 < 10 < IO Z < 10 016 25 < 1 19 < 0,01 • 10 IO < I < 10 12'10 < 5 < 1 7 < 0,01 < 10 < 10 4 < 10 1632, < 5 < I 13 < 0,01 < 10 30 2 • 10 18PA2S1 0,0 0,6~*P,~50 0,4 0.5030 340 < O.S < 20 < 0.01 < O.520 640 < 0.S < 2 < 0.01 0.512 51 1.77Y, 4,60 < 10 < I 0.12 < 10 < O,O16 33 455 3,65 < 10 < I 0.19 < 10 < O,O1SO 7 0.04 16 < 2,002,0 11 0.oi 14 • IO14 < 5 • 1 0 < 0.O1 < IO < I0 1 < 50 142,4 • 5 < 1 9 < 0.01 < IO < IO B < 10 ;'2,07

Appendix D-Patagonia Mountains-Canclo Hills Unit --contin.Sampte Ag Al .6,= 80 Be BI Ca Cd Co Cr Cu Fe Ga Hg K La Mg Mn Mo Na NI P Pb Sb Sc Sr ~ ]] U V W ZnPATS) 19.4 1.42 120 90 < 0.5 < 20 O.01 I.O • 1PA2~4 3.6 0.$3 ?S 30 < 0.$ • 20 • 0,01 1.0 • 1PA255 12.4 0.25 1175 40 < 0,5 1o 0,02 7.5 • 131 z,90x 1.I6 < 1o < I o,os 10 < 0.0157 8,16.....~ 1.06 < 10 6 0.03 • 10 • 0.0151 941 11.90 < 1o < I 0.02 < io • o.o12040159 0.I~ 5 < 200 1215 0.08 9 < 200 90121 0,03 5 180 80• s < I 53 < o.oito I 30 • o.o:25 • I 35 o.o~Io 20 g soIo IO ~ so so~o Io ;o3 ~o I~PA256 0,4 1,$6 c $ 210 • 0.$ < 2 o.o1 l,O < 1P~257 • 0,2 1.6o < $ I090 < o.s • 2 0.03 < o,$ IPA250 O.2 1,25 90 210 < 0.5 2 0,02 • 0.$ < 1PA259 1.0 2,§1 Cos 350 < 0.5 • 2 0,04 1.5 • !PA260 0.2 1.42 ~95 $0 < O.$ < 2 0,1o 2.O 212 3? 2,85 < 10 < 1 0.71 < 10 • o,0122 S40 1.S? < 10 < I 0.65 20 0,O93] 635 1.92 • 1o • I o.61 20 0,0644 ?8 4,45 < 10 • l 0,92 IO 0.0823 545 7.69 < 1o < I o.16 • lO o.2115554565145tl 0.03 < I 90 eo9 o.os s 2eo lo0102 2 140 82L 0.06 < I 270 ~4011 0.05 ~ 1 800 12< s I :9 < o.o1io I 29 < o.oii~ I 16 < o.ols 4 43 o.oilo ~o x Io ~o:o ~o io Io 54Io 1o ~ ~o s~Io ,o )6 1o ~4l0 I0 Sl 20 220P~261 • 0.2 O.72 Io lO < 0.5 < 2 0,02 ~ 0,$ 2PA262 0,6 1.33 < $ 360 < 0,5 • 2 o.ol < 0,$ 5P~=63 • 0.2 2,10 < $ 230 < 0.5 • 2 0.01 < O.5 • lPA264 • 0.2 1,$4 £0o 120 < o.s • 2 o,o5 1.5 11PA265 0,4 1.$7 3O 2170 < 0,$ 16 0,03 0.5 9~4 4~ 2.12 • 10 • I 0.12 L0 < 0,0190 91 2,13 • 10 2 0.43 < 10 • 0,0129 3? 0.43 < lO < I 0*49 20 • 0.0111 101 >15.oo 2o • 1 0.56 • 1o 0,01~4 644 5,30 1o 1 0,4? < 1o 0,02iq2010202542 o,oa t so 3435 0.02 • I < 10 341 o.ls • I Iso 26II 0.09 < I 420 3s6 0.11 4 140 16s I 24 < o,oi~s I ~o7 < o,oi< s 3 12 • o.oiIo 2 59 • o.0~io • IO 3 < IO i~IO < )o ) • IoPA266 0,4 1,64 10 50 • 0.S • 2 0.02 1,0 1123 1903 a,3s 10 • I 0.2? • 10 0.01PA~$? < 0.2 1,13 17S 20 < 0.$ 10 0.06 5,02 16 1024 >IS,OO 20 < 1 o,15 • lo o.01PA268 < 0.2 1,10 < S 20 < 0.5 < 2 0.02 2.014 24 1018 4.97 • 10 < I 0.30 • 10 • o.oiPA~69 < 0.2 1,70 IS 50 < 0.5 • 2 0.03 1,024 0 977 10,96 10 • t 0.34 < 1o 0.OlPA2?O < 0,2 1.67 < S 30 < 0,s < 2 O.Ol 1.06 12 1949 4,18 10 • I 0,33 < IO < o.oi2025201520g o.os 3~ 50 145 Z ~2 < 0.0113 OlO) ( } 6~0 2120 4 ~ < o.o~6 0.05 11 40 42~o I s < o,o1O.II S I~0 lo< 5 2 23 < o.oi0107 ] 40 16 ( ss • o,oIi0 ~ I0 9 zo~0 • I0 ~28 2oo 42I0 < 10 12 zoI0 < I0 4~ 40I0 I0 20 < Lo0~11 < O.2 t.99 sss 40 < O.5 < 2 0.O5 6.SPAt?2 < 0.2 2,24 35 ?90 • 0,5 • 2 0,02 < o.sPA213 < o.2 1,58 35 210 • 0.S < 2 o.o2 < 0.5PA2F4 0,2 1.11 20 510 • 0,S < 2 0,02 O+5PA275 < 0,2 1,00 115 290 • 0.$ < 2 0.02 1,S3 2~ 6O4 >ts.o~ gO < I 0.51 < 10 0,014 42 93 2,50 • 10 • I 0,gl < I0 0.0326 62 9O8 ?,16 1o < 1 0.28 • 1o O.Ol20 82 9g0 6,51 10 • 1 0.42 < 10 0,0116 79 2O96 10.65 20 • I 0,56 • 10 O,Ol20201006010~7 o.ko < I ~30 3~ 5IS 0.OS < I 1oo s~ 517 O,03 t9 e0 lb • 5139 0,05 L3 80 4 < 5t3Y o.os 1o 6~o =B 511 • o.oi4 14 < o.o:9 < o.otI S < o.oi3 19 < o.oi1o ~ 1o ~gs 15o 2~~o < Io s 20 IzIo • Io 9 20 1~Io 20 39 ~0 18PA270 < 0,2 1,21 10 11o < o.s • 2 o,ol 1,o21 ~ 32C~S 5.99 1o < I O.31 < 1o 0,O2P~/? < 0.2 0,12 10 330 • 0.5 < 2 o,~t 0,917 ?~ lSSo R.Ot 1o < l 0.3t • 10 • 0,01PA218 • 0.2 1.70 70 140 < 0,$ • 2 0.01 1,536 64 2250 4.13 < 10 < I 0,26 < 10 0,019A~79 0.2 1,22 385 160 • 0,5 < 2 0.02 4.S 65gi 5~6 3,03 lO < I o,41 1o 0.030A~80 0.2 2,43 345 490 • 0,S • 2 0.03 09,0 lol20 2950 6.01 10 • I 0.43 < 10 0,04455030352530 0.03 12 ?o is s2~ ~.o4 t~ • 1o 1o 1o33 o.03 ~s 3o 16 < 513 0,03 29 ~0 20 t5e 0.02 129 340 ~e < 5I • o.o$$ ) ( o.oi~3 o.ot2S o.oi~o 20 4 Lo R~Io IO 6 • ko I~Io IO 7 Io 66IO 20 6 to 96lo 5o L4 Lo ~61PA2~I • 0,2 2,22 20 1150 • o,$ < 2 o,o3 42,0 23183 4310 S.25 10 4 0.49 • 10 0,0S15$0,03 303 200 Z2 < 5PA~2 • 0,2 2,93 420 140 • 0+5 • 2 0,02 44.5 14651 1100 ?.51 10 3 0.32 < 10 0,033513 0.03 lS Io0 < 2 ISPA2fl3 < 0,2 2.06 405 11o • 0,5 < 2 0,o4 28,0 82S9 2~01 6,1~ 10 < 1 O,S2 < to 0,05z3 0.o~ 5l 28o te toPA284 < 0,2 1.75 40 310 < 0.$ • 2 0,04 5,0 394 13oo 5,2~ 10 < 1 0.37 10 0.10357 OmO) 33 1180 )2 • sPA285 O,6 1,51 < $ 140 • o.$ < 2 0.04 8,0 7235 3796 4.98 IO • I 0.40 • 1o o,o4454 o,o) ~o ~60 2~ • sPA286 0.2 1,14S I0OO < 0.5 10 0.oi l,o S 10)6 1.05 • 10 ( I 0.39 < lO • 0.0135• I o.03 < I 40 < ~ I01320 < 0,5 < 2 0.01 < I 43la I,B~ < I0 < I 0.~4 < I0 < 0.01?50.02 < I < 10 2~ < 5P~20? O.6 0,?$20 1.3PA285 0.4 1,1420 9~0 < 0,5 < 2 0,01 O.5 • I ~I11 1.24 • 1o 2 0.42 < 1o < o.o130I 0,03 3 30 18 < 5PA2~9 6.O 0.?115 250 < 0,5 14 0.03 4,5 2 105PA290 3.0 O.7020 3eo < o.5 6 0,02 ~.S 2 91045 2.05 • I0 1 0.56 20 o,o~ 210123 3.35 • I0 < I 0,7F 30 0.10 ~20)o o.o~ 1 51o ~os 1oio 0.09 I 200 614 50A291 5.O 1,0245 60 0.S 20 0,O2 >100.0 10 12~592 2.22 < 10 • | 0,46 i0 0.05 5) S 12 0.04 6 140 544 5PA292 9,4 0,5020 1~0 < 0.5 2 0.ol 2.5 < I el230 8.32 • 10 < I I.F9 20 0.03 10 I 0,06 < i 550 6340 5P~93 IS.o o,gs IS 90 < 0.5 2~ 0.or 15.0~1 ~309 4.95 < lO < I 0.6~ 5O 0.04 ~ 6 0.03 I ~oo 31~ sPA294 $.2 2,10) 40 • o,S 14 0.0o 2,519 4~ IO0 5.83 < 1o • I 0.23 30 2,12 4515 ] 0.0] 21 1310 410 10PA295 155,0 o.3570 20 < O,5 06 0,02 3S.54 160 660 9,04 • 10 < 1 0.14 60 0.01 220 ~ 0.0~ 8 130 ~564 155B ~s o.oiIo so ix ~o ,21~3 ~5 o.oiIo IO ) IO 220s ts o,ot to 3o ~4 20 ~2o~Io 3o 4o ko 662 ~0 0,01Io )o 8 to ~42 ~g o.oJ? o.otLo • Io L tO 22~3 o.oiIo < lo ~ ~0 20.01~o ~o 7 Io 4~3 0,01Lo ( io L[ 1o ss~0.01I0 < 10 6 i0 626I0 100.01

7' r : : "~ :: 7II m* m m m Jm m m m m m m"oAppendix D-Patagonia Mountains-Canelo Hills Unit -contin.Sample Ag A] AJ Ba 60 • Ca Cd Co Ct Cu Fa Ga Hg K IJi Mg Mn Mo Na NI P Pb Sb SC Sr ~ TI U V W ZnNurab41- (Ppm) ~Pct~ ~P~m) (Ppra) (Ppm) (Ppm) (Pet) (Ppm) (Ppm) (Pp~) (Ppm) (Pet) (Ppm) (Ppm) (Pet) (Flxa) (Pet) (Ppm) (Ppm) (Pct) (Pp~) (Ppm) (ppm) (Ppm) {Ppm) (Ppm) (Pct) (Ppm) (Ppm) (Pp~) {ppm) (Ppm)Pklg~ 107.0 0.77 $30 50 < 0.9 56 0.03 16.0 3 SO 4328 5,98 < lO < I 0.98 20 0.06 27530 0.06 5 250 2.29~_ 1370 2 19 • 0.01 < 10 • 10 30 < 10 209~PA297 23,0 1,10 325 90 < 0.9 • 2 0.03 2'9 12 39 963 $.69 < 10 • 1 0,$9 10 0.06 1504 0.03 16 350 3112 100 3 30 < 0.01 • 10 < 10 41 < 10 372PA298 115,6 0.97 199 70 < 0.6 44 0.03 5,0 14 76 6966 4,41 • 10 $ 0,46 20 0,94 807 0,02 39 970 1.00%_ 575 9 60 • 0.o1 < 10 < IO 21 < 10 1244pA298 3.2 0,46 < 5 50 < 0,S 8 0.02 2,0 6 203 119 2,32 < 10 • 1 0,31 lO O,Ol 5510 0.02 13 60 120 10 • 1 11 • o.01 < 1o < IO 6 • 10 62PA398 1,6 2,07 30 600 < 0,6 < 2 0.04 0.6 • I 94 279 12,34 < 10 • I 0.39 20 0.03 42011 o.o3 • | 1240 478 35 3 25 < O.Ol • lO • lO 62 • lO 286PA3OI 147,6 1,59 610 IISO • 0.5 66 0,04 0.6 4 94 909 3,78 < 10 < 1 1.17 10 0.05 100PA302 32,2 1,76 440 2370 • 0,9 40 0.02 12,5 15 85 9029 1.46 10 3 0.73 • 10 O.OS 125PA303 1 6,40 0,97 710 190 < O,S 124 0.02 19.5 6 136 924 2.65 • 10 < 1 0,51 10 O,O3 7OPA304 3.2 ~.25 75 120 • 0.5 6 O.02 73,5 12 114 753 3,12 < 10 < I 0,62 3O O.08 130PA309 26,0 1,10 195 IBO < 0.9 32 0,01 9,0 4 58 7O9O 2,92 < 10 < 1 0,e4 3o O.02 6o9 O.0S • 1 1270 4756 5253 0.02 • 1 330 2209 1608 0.04 9 390 2724 14559 0.03 19 440 298 103 0.04 • I 920 4950 2001 5o • 0.01 < 10 • 10 7 < 10 2021 14 < 0.01 < lO • 10 4 • I0 16801 20 • 0.01 < 10 • 10 5 < 10 4403 27 • 0.01 • 10 40 14 < 10 10061 20 • 0,01 < lo 2o 4 • lO 618PA30E 1,4 0,39 9 120 • 0,$ 10 O,OI 1,9 < 1 23PA307 S.4 0,46 < S 1310 < 0.6 < 2 0,02 O.S • 1 90PkOO8 2.0 2.16 80 30 • 0,6 • 3 0,34 0.5 9 12PA398 0.4 1.95 39 90 < 0.5 • 2 0.54 0.5 I1 23PA210 9.9 1.32 55 330 • 0.5 • 2 O.Ol • 0.5 • I 41399 O.SO • lO < 1 0,31 • lO 0,01 3543 1,72 • 10 • 1 0.35 • 10 0.02 29097 4.84 20 9 0.14 20 1.65 1245244 4.06 I0 2 0.19 lO 1.83 1180105 14.00 < 1o • 1 0,19 • lO 0,03 408 0.oi s 40 1684 0.02 I 40 7e4 0.03 12 1370 634[ 0*04 16 1320 264 • O.Ol 7 230 2• 5 • I 3 • 0.01 < 10 < 10 3 < 1o 3#8• 5 < 1 S • O.Ol • 1o 1o 9 Io 88< 5 o 23 0.05 • 1o < 1o 94 lO 374• 5 7 29 0.12 • 10 10 97 10 1325 I 19 < 0.01 • 10 • to 19 • IO 134PA311 7,4 O.BO 30 BO < 0.5 16 0.03 3,9 < 1 113PA312 4.0 2,61 116 30 . 5.0 14 2,61 8.5 12 113PA313 9,4 1,98 75 • 10 1.0 3 12.09 9.6 6 166PA314 13,4 2,05 95 10 4.0 32 7,26 19,0 I0 143PA315 2,8 2.56 135 40 3.0 < 2 12.31 13.9 10 9o17 0.69 10 < 1 0.26 10 0,11 9554 3,14 < 10 4 0,15 20 0.90 • 10ooo29 0,94 • 10 9 • 0.01 • 10 0,70 > 1000063 3.15 • 10 • | • 0.0| < 10 2,19 • |0ooo9O 3.01 < 10 1 0.49 < 10 1.96 > 100005 < o,o1 < 1 240 4385 < I 24 0.01 < 10 < 10 4 < 10 11042 0.02 14 800 2564 57 238 0.18 20 • 1o 24 • 10 30648 • o.01 6 190 1928 S2 75 0.04 • 1o • 1o 4 • lO 16594 < o.ot 21 720 • 10000 lO5 24 0,17 < 1o • 1o 22 • lO 99963 • o.ol 17 830 474 1o4 141 0.03 < 1o • 10 24 1o 2978P/~I~ 2,4 2.04 150 10 S,O 2 9.92' 11,0 9 34 174 2.97 < lO 2 0.05 < IO 1.04 7905 < 1 • 0.01 3 650 386 10PA317 1,0 1.32 4S 30 0,9 < 2 1,91 0.9 5 65 46 2.46 lO 2 0.33 1o 0.59 1535 3 0.05 • 1 700 lOG 5PA318 2,0 2,24 65 20 < 0,9 < 2 0.19 • 0.5 1 42 31 3.00 20 6 0.15 10 0.75 440 4 • 0.01 2 420 84 5PA313 40,8 0,44 210 < 10 • 0.5 70 0.98 • 0.5 53 119 193 6.78 < 10 29 • 0.01 30 0.31 • 10000 12 < 0,01 19 580 248 5oPA320 15,6 0.39 225 30 < 0.5 6 0.42 • 0.5 9 313 76 4.59 10 < 1 0,08 < 10 0,05 • 10000 4 • 0.01 24 580 104 154 65 o,oi < IO < IO 12 IO 26764 47 0.14 40 • 10 16 • 10 4427 29 0.09 60 < 1o 50 20 7e2 2 • o.oi 70 0o < 1 40 5342 4 • O,Ol 20 • 1o < I 20 252PA321 176.2 0,20 1590 < 10 • 0,5 9 0.11 30.0 4 323 720 3.46 • 10 • 1 0,05 • lO 0.02 7260 9 • 0.01 20 120 • 10000 15001 3 • o,ol 50 < 1o 1 < 10 > lOOO¢PA323 75.0 9,45 920 • 10 • 0.5 4 0.30 6,$ 6 263 349 2.19 < lO 7 0,07 • 10 0,05 • 10000 10 • 0.01 16 050 • 10000 2501 4 < 0.01 • tO < lO • L < 10 2292PA323 114,0 1.21 65 70 • 0.9 24 0.97 10,5 2 98 671 4.43 10 • 1 9.57 20 0.19 6850 25 0,01 8 940 • 10000 3054 19 0.o1 < IO • 1o 34 1o 2B76PA324 12,4 0,72 SO 30 < 0.5 • 2 0,62 0,5 < 1 130 149 1.69 < 10 3 0.24 < IO 0.04 390 402 o.oi 7 350 303630 2 1o • O.Ol < 1o < lO 11 < 1o 656PA32S 9,0 1,88 195 60 < 0.5 6 1.22 0.0 4 95 125 9.74 lO 2 0.51 10 0.72 485 < 1 0.04 • 1 750 186210 4 46 O.OZ 30 < 10 39 10 2910PA326 • 200.0 0,09 943 • 10 < O,S 12 7,49 >100,0 9 149 298 1.24 < IO 6 • 0.01 • 10 O.OI • I0000PA327 6.4" 1.19 50 110 < 0.9 2 0.29 11.5 2 29 14 0.34 10 < 1 0.52 • lO 0.07 405PA329 69.3 1,31 105 20 • 0.5 422 0.95 1.5 llO 151 3191 >15.00 • 10 • I 9.14 • 10 0,20 1360PA329 3.6 2.59 20 60 < O.S 14 1.34 • O*S 8 201 132 3.50 • I0 < 1 0.43 10 0.69 400PA330 6S,6 0.40 1310 < 10 < O.S lO 3.99 5.0 5 351 2596 5.76 • 10 < 1 O.OI • IO 0,07 64451 < 0.01 < 1 46o • 10oo0 960 • 1 25 < O,Ol 110 < 10 < 1 250 • 10000< 1 < 0,01 < 1 6o 221415 2 11 0,01 50 < 10 13 • 10 475627 < 0.01 25 llO 1152 104 15 0,03 • 1o < 10 21 • 1o 47410 0.20 11 530 312 $7 170 0.20 < 10 < lO 50 < 1o 1o417 0*02 I0 120 • 10000 13501 42 O,Ol < lo • 10 7 • 10 2942PA331 39.6 0,29 leo 10 • O,S 104 0.13 < O.S 129 310 449 >19.00 • lO 5 0.04 • lO 0,02 13519 < 0.01 9 < 10 332 5PA332 34,2 0.24 35 10 • 0.5 110 0.34 O.S 166 31~9 123 >15.00 • lO < 1 0.02 • IO 0.02 IBO54 • 0.01 19 < 10 1914 35PA333 116,8 1,27 SO • 10 • 0.5 240 0.31 $6.0 • 1 104 1018 >15.00 • 10 • 1 < 0.01 < 10 0.39 • 100007 < 0,01 13 140 570 5PA334 177.6 1,30 00 • 10 < 0.9 902 0.30 >lO0,O 11 140 7344 >15.00 < IO 6 0,06 < 10 0.38 • 100009 • O.OI < 1 1030 1210 5PA336 6.92...~* 0.24 266 20 < O,S • 2 0.60 >100.0 95 19 1415 4,97 < 10 < 1 0,03 30 0.49 32,80% < 1 0.0215 630 4.11.._~%" 5552 2 O.Ol • 10 • IO 1 < lO 31o2 Io o,o1 • IO • IO 2 • 1o 3514 2 0.03 < 10 • 10 22 5BO • IO0OO4 2 0.01 < lO • 1o 15 610 • 1oooo7 12 • 0.01 • lO < 10 • 1 150 13*40%PA936 13.8 0.76 IIS SO • 0.5 < 2 0.20 30.5 30 13 72 2,71 • 10 8 0.44 40 0,24 10,20% 8 0.04PA337 99.40._~* 0,97 160 210 < 0.5 • 20 0.23 16.0 25 19 3.58% 4.24 • 10 13 O,le 10 0,13 4690 3 0.02PA338 30.2 0.61 240 40 < 0,9 • 2 0.22 5.5 29 45 666 6.04 • 10 S 0,29 30 0.09 6085 • 1 o,03PA333 17,70.___~* 1.11 SOS 9000 5.0 • 2 0.24 >lO0,O 146 6 25O3 4,28 < 10 < I 1.30 30 0,31 27.90% 21 0.984 460 1570 259 < 200 1.98~ 29020 920 1050 26030 930 998 37552 929 ¢ O.Ol < 1o • 1o • 1 • 1o 69661 25 • o,o1 1o < 1o 1 70 2,74~6 8 < O.Ol < I0 < 1o 51 < 10 62e04 1759 0.04 200 < lO s SO ;75oD9: !iii '~ %ii:~:?~ ~I~ r ~ i

Appendix D-Patagonia Mountains-Canclo Hills Unit --contin.Sam~e Ag ~J AS 06 Be ~ Co Cd Co Cr Cu Fe Ga Hg K La Mg Mn Mo Na NI P Pb Sb Sc Sr ~ ~ U V W ZnNumber ~l~p~p (Pct~ (ppmp ~ppm I (Pp~) (ppp ~tp (Ppmp ~Ppm~ I~p~l Ipp~ 1 ~pct I (Pp~) Ippmp I@ctp (P~np ~pct~ Ippml IPPmP IPctp ~PPml (~Pml I Pp~) I,p~) (~pm I IPp~ 1 (Pctp (~P~I IPP~ IP~>~P IPP~P I~PPA340 6.60_~" 0,32 1295 430 3.5 < 2 1.41 08.0 45 111 379 1,03 • 10 • 1 0.50 30 0.11 36.3O% IO 0,o4 8 ¢80 766 450 2 554 < 0*OI 40io I 270 ]168PA341 17,10.._~" 0,30 1205 420 4,5 • 2 5,58 22.5 20 177 355 2,19 < 10 9 0,47 10 0.13 11,90~ 2 0.05 • I 220 )56 295 1 304 < O.OI 190PA34213,10.._._~ ~ 0,21 3720 1920 15,5 < 2 >15,~ 34,5 23 44 g~S 5.02 • 10 2 0.24 < 10 0.09 j2,20% 3 0,03 8 30O 3560 1150 2 284 ( 0,01 80PA343 95.6 0,35 950 170 1.0 • 2 1.29 15.5 34 150 89 1.82 • 10 • 1 0.37 30 0,18 21,30% 14 0,os 12 820 552 225 2 740 • 0,01 I0PA344 90.2 0,34 380 210 O*S • 2 0.33 10,5 34 189 164 0.65 • 10 • 1 0.32 20 0.27 19,60~, IO 0.06 8 420 2140 305 i 569 < 0,0I I0PA345 3.4 0,14 • 5 • iO < 0,$ • 2 0.03 1.5 < I 144 100 14.94 10 • 1 0.08 • IO • 0.01 40 9 0.01 8 50 260 < 5 1 1 < 0,OI l0IO I 230 2588IO 9 900 42@6IO 8 ~20 ZTeOIO 1 20 19SOIo I io 13oPA346 < 0,8 1.16 5 30 < 0,$ • 2 0,04 < 0.5 2 255 12 1,61 30 < 1 0,13 20 0,06 290 6 0,12 12 ~0 92 5 < 1 20 O,OI • 10PA347 < 0,0 • 0,65 15 440 • 0,S < 2 0,06 0*5 3 187 / 1,36 20 • 1 0,22 10 0,04 285 S 0,14 7 60 186 15 1 32 0,01 20PA348 < 0.g I,~ 45 180 < 0.5 < 2 0,05 < 0,S < I 1~0 2 2.02 10 < I 0.37 10 0.06 60 5 0,~ 9 1~0 22 ~ 10 2 IS4 0.0i l0PA349 < 0.8 2.78 95 480 3.0 • 2 0.07 2,5 19 66 110 >15.00 20 < 1 0./6 10 0.2F 2230 8 0,O5 20 1160 ]54 25 12 44 0,01 1oPk350 1.6 1,71 50 710 < O.S • 2 0.03 2.0 7 265 46 2,29 20 < I 0.3/ 20 0,06 1500 13 0.05 l 110 322 20 I 48 0,OI 20Io 3 30 llOIO 19 io 1o2Io 166 so Ioz~Io 6 io goPA3SI 1,6 1,08 30 880 < 0,5 10 0,05 1.5 9 142 193 9.54 20 • I 0.14 20 0,02 4750 58 0.03 3 350 506 20 2 2o o.ol loPA352 68,8 1.89 < S 20 • 0,5 252 4,32 >100.0 29 110 7303 >16,00 30 • I 0,33 30 O,68 9800 S O,03 13 710 960 S 3 20 0,01 l0PA353 38.4 2,16 10 20 < 0.5 9~ 0.23 1~,0 9 12~ 1336 7.?~ 30 ¢ 1 0,47 10 0.58 3470 8 0.02 g 420 568 IS 2 6 0.01 I0PA354 12.0 1,39 60 $0 • 0.5 86 0,19 4.5 22 162 7630 >15.00 < 10 < 1 0.43 20 0.06 505 2 0.04 ? 1080 152 60 3 43 0.0[ 10PA355 39.2 2,10 • 5 210 • 0.5 • 20 0.39 15.0 118 252 2.43~/, 6.19 30 • I 0.97 30 0.16 2,34~ 7 0.05 42 300 56 5 4 44 0.02 30~o ~5 to 41~lo 27 20O g,~S~Io 22 lO 6e36Io 3S So 16SOIo 41 so se36PA355 171,0 1,46 305 090 < 0.5 102 0.30 P100.0 330 < 1 1371 5,42 20 23 1.95 30 0.12 33.8,.~_~ 31 0,09 15 1600 3,37% 180 11 101 0,OI 10PA35~ < O.8 0.38 10 50 < 0.$ 6 O.05 1.0 5 3"92 42 1.28 20 < i 0.I0 • I0 O.01 1260 ~ 0.02 13 60 190 10 • l 48 o.01 I0P~36S < 0.8 4.34 < S tto • O,5 • Z 3,25 ~ 0,6 32 t63 ~7 ~.70 70 ¢ I 0,24 2~ ~,02 620 < 1 0.37 67 ~520 1~ to 15 150 o.~o 1oPA3S9 12,20" 0.65 395 70 • 0.$ 160 4,04 8,5 30 128 721 6.85 80 45 0.23 30 0,13 1,31_~% 8 0,05 12 1380 21.90% lgS S 271 0.OI ]0PA360 62,8 1.12 645 170 < 0.5 16 0.44 18,0 40 219 420 10,~0 10 8 0,31 10 O.IF 3,56.~__~% 59 0,03 42 890 1.57..___~% 320 10 320 0.02 l0Io es io S486lO e io 160~o IA2 Io 6oto 648 7o 3742Io 122 io 4348PA361 11,2 0,29 218 10 • 0.5 12 0,0~ 1.5 28 553 48 6.36 IO • 1 0.11 • 10 0.02 4015 10 1 3 • O,01 10 l0 tO ~0 602PA362 • 0,8 1,10 45 110 O,5 0 0.0~ • 0.$ 4 211 25 2,48 40 < I 0.$6 3O 0.14 140 2 0,O8 3 140 26 5 2 ]3 • 0,01 SO 10 7 IQ 34PA3~3 • 0.8 t,32 55 70 0,5 • 2 0,0~ • 0,5 2 198 4l 2,~0 20 < 1 0.3? 4O O,12 60 4 0,03 6 220 24 5 ¢ tt • 0,01 L0 tO 17 tO 36PA364 < 0.0 1.99 180 360 2.0 < 2 0.18 0.5 10 216 44 5.34 20 • i 0.61 40 0.09 ]220 3 0.05 23 1210 )26 5 3 20 < O.OI 50 I0 ~4 I0 ig6PA265 < O,O 0,66 20 100 < 0.$ < 2 0.94 < 0,S 6 403 8 4,06 20 1 0.34 20 0.04 $0 g 0.0t5 14 90 72 S 1 10 • 0,O] 20 IO 6 io 34PA366 4,0 1.77 1830 30 0.5 < 2 I.ll 6,5 28 105 331 /.15 20 1 0.64 30 0,22 1.36% 5 O,04 36 1260 170 50 7 • 0.OI 10PA36F 1.0 2.52 3915 200 < 0.5 < 2 0.24 < 0,5 23 136 150 9,18 20 < I 0.76 60 0.29 1.58% 6 0.13 20 9YO lS8 25 92 0.02 20PA358 < 0.8 1.79 25 20 < 0.S < 2 0,02 < 0.5 g 147 6056 1.73 20 • I 0.74 10 < 0.01 I0 3 0,07 4 70 132 l0 10 < 0.01 l0PA3G9 12.0 1.43 65 80 < 0.5 • 20 0,02 2,5 358 211 0,99% 0.93 20 1 0.So 10 < 0,01 155 30 0,04 41 10 662 250 11 • 0.01 30P&3/o • 0.8 1.69 10 40 < 0,5 < 2 0,01 < 0,5 14 252 082 1,00 27 0,03 7 lOO 6 5 27 < O,Ol 20Io 4~ 30 3206lo 4~ i0 2~4I0 2 io ~o:o 3 so 224Io 3 lo ~ePA~71 3,2 0.63 • 5 60 < 0.5 6 0,04 < 0,5 / 340 399 5,94 10 2 0.6/ < IO • 0.01 35 go 0,[2 3 60 26 5 l0 O,Ol 30PA3/2 2.4 0.91 < 5 10 < O.S 42 0,02 < 0.5 5 190 667 >15.00 • |0 6 0,41 • 10 0,02 25 334 0,04 7 330 22 30 2 9 O,01 20PA373 ( 0.8 1,70 < S 10 • 0,$ < 2 0,0[ < 0.5 45 209 94 3.21 20 < I 0.62 10 • 0,0l 20 234 O,O] 3 70 to S 2 18 O,Oi 80PA374 3.2 2.61 148 30 ],0 < 20 0.04 < 0,5 13 227 1.02% 1,40 30 • 1 0,82 30 < 0,01 15 11 O.lO 9 30 IIO 30 1 24 O,Ol 10PA375 • 0.8 1,41 20 50 < 0,5 < 20 0.02 < 0,5 40 196 1,32% 0,03 20 < I 0,54 20 < 0.01 IS 84 o,0s 29 50 76 15 l 23 0,01 S0lo 4 4o xeIo 22 < so )~Io ~ ,o Io~o ~ < ~o 46LO ~ < 50 4~PA2/6 • 0.8 2.25 05 50 < 0,5 < 2 0.03 • 0.5 21 232 2793 3.84 30 < I 0,04 30 < o,oi 20 27 o,Io 7 240 352 35 I Is o.ol soPA3/7 1+6 1,06 20 70 o,$ 4 0.03 < 0.5 10 209 299 3,17 30 < I 0.48 10 0.01 Z5 13 0,04 25 90 56 15 1 IS 0,01 l0PA378 < O.8 0,52 175 IO • 0,5 [6 0,03 • 0.5 2 139 078 ~15,00 20 • 1 0.02 10 0.oi 20 45 0,o3 < 1 030 76 30 2 23 0,01 IoPA3/9 3.2 0.55 05 40 0.5 • 2 0.01 < 0.5 2 276 /o 2.75 20 • 1 0.5[ 10 • 0.01 15 72 0.03 11 100 44 $5 < [ 10 o,ot ioPA3eO 4.8 0.98 25 20 • 0.5 • 2 0,02 < 0,$ 0 203 147 1.9[ 30 < I 0.46 30 • 0.01 20 58 0.03 11 100 158 130 1 20 o,ol IoIO ~ 30 24Io io Io ~6Io 2S 300 24Io 4 io sIO 2 io 16PA381 • 0.~ 1,66 275 60 1,0 • 2 o.01 0.5 8 123 3275 1,16 30 • 1 0./? 10 0,03 15PA382 1.8 0,76 535 10 • 0,5 6 0.01 < O.S < 1 53 1964 >15,00 50 < 1 0.10 I0 0.02 253 0.04 2 30 22 30 1 [1 • O.OI [0 < 10 • I 10 5416 0.02 ?1 250 26 10 2 [6 • O.O; IO < [0 24 ]0 26RDI0H i i i l H H H i H U l H _ H i I H H

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20 0,03 6017 0.04 to 60 ~6PA445 < 0.8 2.01 • 5 50 < 0.5 0 0,02 3.0 5 203 323 1.10 40 1 0.3? 50 0,04 804 0.04 3 130 4~10 ~0 o.I~ Io12 4 < o.ol IOI s < o.oi 2oI 3 < 0.oi 305s t 6 < o.oi 4010 ~4 120 326I0 19 3690 9941o 7 20 40Io s zo aoto i ~o 60PA446 < 0,8 2.41 40 210 < 0,5 < 2 0.02 2,0 5 201 530 1.08 30 < 1 0.56 30 0.06 B0I, 0.0~ 12 110 62z 21 < o.oi toI0 4 30 46PA441 < O,B 2.05 25 230 < 0.5 < 2 0.03 1,5 11 130 4954 3.01 30 • l 0,99 30 0.11 95PA448 2,4 2,54 00 70 < 0,5 0 0,02 0,5 41 191 7891 2.55 30 < 1 0,SS 4O o.o? 85i 0.03 II 90 140.0~ 15 60 ~046 8 o.oi LOz 3 < o.oi ~o1o )g ~o 42Io 51 Io 9oPA44~ • 0,8 1,64 • S 130 < o,S 0 0.03 2,o 29 90 75~ 5,86 20 • I 0,52 20 o,to 95< 0.~ tS 1t0 t~s 3 o.o~ 10IO 43 to 3¢PA450 • 0,8 2*05 1o 340 < 0.5 4 0*02 2.0 4 267 120 0,90 30 1 0.32 30 0,03 105o.os s 120 50s 2 13 < o.ol 30io 4 to i~2PA4Sl < 0.8 1,6; 20gO < O,S 20 0,03 4.5 4 213 93 8.17 20 < 1 0,59 10 0.02~5 ~ 0.0710 130 425 14 < o.o~ loIO i IoPA412 < O,8 ~.18 35 120 < 0.~ 6 0.0Z 2.03 239 50 t,83 3O < 1 0,51 so 0,0370 ', o.os3 I~0 s~5 21 < 0.01 Io10 ) zo 2~PA453 < 0.8 O.58 10 40 < 0.S 16 0,02 < 0,$2 122 73 0.9~ 20 < I 0.40 50 0,064so.o4s )0 lsos 4 < o.o1 io1o 2 IO 16p~454 < O.e O.51 < 5 30 < o.5 1o O.Ol < o,S4 200 54 4.O4 IO < I 0.33 Io o,oi~5 ~ o.o~6O 52s < 3 < o.oi ~o1o ) IO 16PA45S 2.4 1.O3 145 $0 < 0.5 14 0.01 O,S1 295 3602 3.99 20 I I.OI 20 o,oi16 zzo Io52lo toz < o.oi < IoIo 21 Io 62PA456 < 0.8 0.64 45 40 < 0,S 20 0.01 < 0*59 16e S640 3.01 20 • I 0.36 1o O.Ol~s o.o31 40 tos 7 o,oi 301o 2 Lo soPA4S7 < 0,8 O.54 • 5 1o < o,5 18 0.0[ • 0,55 357 66e o,5o < 1o < I 0.19 • lO O,Ol30 ', o,o~It so 53 sog o.oi < 10~o 6 LO IOPA4S0 < 0.8 0.49 5 10 • O.S 18 0.01 • 0.S t2 157 1109 13.23 < 10 • I O*15 • Io O.OlPA45% < 0,8 1.19 70 40 • 0.516 O,Ol < 0.5 1o 416 31/2 S,o0 IO 1 0,44 IO 0,01PA4~O 1,6 0.53 • S 70 < 0,5 28 0,02 • O.S4 293 69 S,35 40 12 O.15 l0 O,Olzo 0.02~s ~' 0.0525 0.~6 ~I0 6 sLL 90 38 I55 t60 28 55 o.oi < LO25 o.oi Io20 o.ol < io:o 6 1o 56lO 1o )o10 4 =0 i$PA461 < O,B 1,40 S|o 220 < O.S 54 0,03 < 0.SS 115 382 >15.OO 40 • I 0.72 70 o.oszs , o.oz4 ~Iso 514 ~s6 e3 o.ol < 1oIo 47 so 40PA463 < O.8 1.40 020 240 < 0,S 36 0,02 < 0.53 134 151 14.17 40 < 1 0,63 60 0,03~o o.o~i 17~o re45 5 24 o.oi < 1o1o ~n io ~oPA463 3.2 1.45 leO go < O.5 14 0,02 < O.56 243 362 3,o5 5O I 0,?6 30 0.0330 i 0,04to 230 Iio is3 ~e o.oi • toIo 1o LO 24PA464 13,50~* o,20 4895 1o 1,o 804 0,10 >100,06 183 1699 1.89 40 • I O.OS < to 0.07~o ~: 0.047 210 Lg*3~F/, ]230t B o.ol ~oio i~ 90 ~oo-t.PA465 25.6 Q.82 1270 90 1.5 200 0.04 3.510 243 h06"Y. 11.06 20 < 1 0.35 20 0.032S ~, 0.04so ~se~ 1is14 0.01 40Lo z~ so ~so8PA466 2,4 1.88 30120 < 0.5 19 1.28 • 0.5 3~ 54 330 S.04 30 < I 0.33 20 I.I0 620 < , 0.20z 13oo 456 5s so o.~ < IoIO 16S < Io 3S2PA467 I0.50~ 0.32 1500 < I0 < 0.5 760 0.04 < 0.5[4 111 2.677. >15.00 < 1o 24 < o.o1 < IO 0,03 60 ~ 0.032 • 200 9260 ~.64~~ o.ol < to1o 16 < so ~l~sP~69 ~3.~ 0.19 ~55 < Io < 0,5 ~1o 0.02 • 0,5396 1~ 12.12 < 10 3 < o.ot ¢ Io o.oi 25 ~ 0.03t 90 x544 1265I 3 o.ol < ~0Io o so 274PA469 142,4 0.26 2435 • IO < o,s 884 0,02 0.514 269 9554 13.15 • 10 8 0.06 < to O.Ol 280 Lr 0.03l ~40 0406 5015~ o.ol < IoLo )o 1960 3146D12U mm U nm m n mm u u n mm m mm n m m n n u

:

Appendix D-Patagonia Mountains-Canclo Hills Unit --contin.Sacnl~e Ag ~ At ~ Be B] Ca Cd Co Cr Cu ~:e Ga Hg K La M0 Mn Mo Na NI P Pb Sb Sc Sr ~3 ]~ U V W ZnNUmPer (Ppm) (Pct) (Ppm) (Pp~) (Ppm) (Ppm) (Pet) (Ppm) (Pp~) (Pp~) (Pp~) (Pet) (Pp~) (Ppm) (pet I ~I~) (Pct~ (Ppm I ~ppr~? (pctp (PP~) (PP=I (Ppm~ Ippm~ Ippm I (Pp~ Ipct) ~ppr~ I Ipf%m I IPp~ fppr~? Ipp~)PASI2 1.2 1.32 75150 < 0.5 < 2 0.03 0,5 < I 20 39 1.76 < [0 • 1 0,92 30 0.13606 0.06 < 1 140136 40 < I 25 o.0120 :2 < LO 10PA514 2,0 1.25 < 530 • 0,S < 2 0.41 0,5 l 56 126 4*14 IO 4 0,33 30 0.9289029 0.06 14 830136 S ~ ~3 0.11I0 90 • 10 le~PA515 19.8 1.07 529520 < 0,5 < 2 0.11 4,0 3 57 lee 4.02 IO 5 0.09 10 0.03850 0,02 1 8o 6650 9o5I 5 0.0~10 6 lO II~0~0516 > 200.0 o.07 >t0000PASI? 00.2 0,44 43~SPASI8 97.6 O,IO 3335PA519 67*6 0,32 4490pA520 55,e o,o5 54o40 < 0.5 3O60 0.06 t?.o 20 tS >t00oo >15.~0 to • t 0,02 • 1o < o.ot40 < 0.5 150 0.07 5,0 < 1 65 1699 2.67 10 < I 0,26 • 10 0.0210 • 0*5 1154 o,1+ < 0.5 5 124 5931 5,79 • l0 05 0,1l • l0 < O.Olto < o,5 1068 0.05 • 0.5 35 200 0149 12.24 < IO 6 0.20 • Io o.ol10 < 0.5 76 0,o2 3,0 5? 7o 264 14,88 LO • I 0.o4 < 10 0,01706555105258 • 0.013 0.ol0 0.01I0 0.0244 < 0,01l < ~oo 10000 6125 2 5: so toooo 1495 I5 80 4640 4835 < I 7s 1o 3854 2555 1 134 • Io 2o14 535 I 70.010.010.010.01o.o11o SSO 2884I0 20 ~S04I0 < 1o ~262Io 470 3116Io 40 42PA52| 152,2 O,31 LO?OPA522 > 200.0 o.76 340PA523 5.4 1,41 < 5PA.~.4 11,o 1.42 60PA525 1,4 1,50 < 51o < o.5 156 o,to 4,0 6 L36 2003 >15.00 < toL o.23 • tO 0.o25040 < 0.5 294 0.06 ;,S 5 36 101o 11.31 1ol 0.34 • 10 0.04,:570 < O*S < 2 0.49 1.5 6 S0 153 3,14 201 0,25 I0 1.0240 < 0,S < 2 0,28 1.0 4 60 104 3,49 10 < I o,es 20 0,36 ~0060 • O.5 < 2 0.43 0.5 2 27 115 2,0210 < I 0.29 10 boo 50s4 0.0127 O. 122 0,073 0,04l 0,07t ~o toooa loI 2~0 I0000 545s soo 1984 < 5t ~o0 ~924 ts8 560 132 < 51 6s O.Olt 6S o,oi4 23 0.192 tS o.ot4 19 o. II1o 1oo 23S0Io 18 200 tooe30 67 I0 t~O10 3O < xo 07230 64 Io ~26PAS26 5.0 l,Sg 9030 • O.S < 2 2.39 4.0 < 1 63 120 3,1710 < I 0.~2 20 0,52 640PA522 > 200.0 o.31 >1o0oo • 10 • o.5 1948 0.02 40,0 19 242 • iO000 >15.00 • l0 < I 0.09 < Io o,o2 59sPAS2~ 8.o 0.05 ~OIS • 10 < O,5 42 < 0,O1 5,0 4 505 457 1.94 • 103 < o.oi < Io < o.oi osI 0,085 300 2306 15

: m mm "".mr -- "-~ 1m m m m m m m m mm m mmmAppendix D-Patagonia Mountains-Canelo Hills Unit -contin.Sample AQ AJ As Ba Be Bt Ca Cd Co Cr Cu Fe 0O H0 K 1.8 Mg Mn Me Na NI P Pb Sb Sc Sr 1"1 "n U V W Zn~umer ( ~ ~Pct| (P~) ~ ) (P~) (P~) (Pet) (Ppm~ (Ppn) (Ppm) (Pp~ (Pc2) (Ppm) (ppm) (pct) (P~) (pet) (~r~ (P~) (pct] (Pm~) (Pp~) (~) (PP~) (~1 (Pp~) (Pct) (Pp~) (Pp~) (~P~) (Pp~) (PP~)PkSS6 0.4 1.5S 1SPASS? 4.2 1.00 < SPASS8 6.0 0.66 < 5PASSO 8*6 1.22 < 3PA560 2*4 1.g7 < 570 • O.S • 2 0.09 O.S 79 20 2525 6.26 10 < 1 0,63 50 0.14 315 41 0.02 33 530 12 • 52 4 < o,ol < 1o • 1o 26 1o 1049O • 0.5 10 0.33 0.5 3 114 2673 3.86 10 2 0.68 19O 0.65 1445 184 0.0514 840 89 2 6 • o.01 40 < 10 46 20 172110 • 0.S 0 0.16 1.0 150 283 593 >IS.OO 10 < I 0.41 30 0.08 65 236 0.05 42 520 209 2 3 • o.01 < lO 20 13 19O 62gO • 0,5 98 0.15 1.0 29 72 3956 >15.00 10 • I 0.46 60 0.35 320 402 0.0514 1190 2925 3 3 • o,ol < 1o < 10 75 150 326160 • O.S 4 0.62 0.5 13 147 1237 2.64 10 • 1 0.40 30 0.04 545 11 0.0812 850 9S 4 52 0.17 • 1o 20 83 40 140PA561 4.6 1.47 10PA562 6.8 2.34 IS0PA563 55.4 1.27 • 3PA564 9,9 0.42 3040PA565 29.2 2.00 $75110 < 0.5 22 0.62 O.S 2 193 3240 4.06 20 1 0.25 120 1.12 1515 1256 0.07360 < 0.$ 30 0,07 9.0 17 00 3790 5.08 20 < I 0.48 50 2.53 3546 37 0.0530 • 0.5 200 2.03 1.5 31 53 9.56% 12.64 20 < 1 0.09 170 0.90 790 4060 0.04260 • O.S 124 O.ll 9.0 3 423 1033 5.88 10 S 0.07 10 0.02 3?0 4 0.09130 • 0.S 1432 0.21 3.0 • 1 ]28 2290 8.09 20 9 0.43 20 0.41 490 1 o.o729 870 6426 I0~0 89494 < 200 3O000go < o.s. 32 0.51 3.0 3 127 280 4.25 20 10 0.35 30 0.95 860 • I 0.00270 • 0.S 920 0.08 6.0 4 305 2602 5.22 • 10 • I 0.31 • 10 0.09 116 9 0.08290 < O.S 42 0.23 4.5 19 79 666 5.72 20 4 0.65 20 0.01 2545 < 1 0.0430 • O.S 3030 0.02 15.0 20 441 2966 5.69 • 10 < I 0.02 • 10 < 0.01 660 20 0.0410 < 0.3 1120 0.04 >100.0 74 404 1.6411 14.09 • 10 • I 0.02 • 10 0.01 190 • i 0.04I 1 eso 200xs 360 40281o 01o 21G20 190 860412 < 200 96789 4 40 0,09 90 • 1o ?? so 84490 • I 71 • 0.01 • |0 90 34 340 6045 3 15 < 0.01 70 < 10 6? 9o 726260 3 4 • 0.01 • 10 30 3 8280 5632295 1 3 • O,Ol • 10 30 2 22c~ 1.41%PA571 14.6 1.54 430 90 < 0.5 742 0.21 S.O 21 177 7681 1.19 10 < 1 0.$4PA$72 48.0 0.87 245 150 • 0.5 1598 0.32 6.5 10 229 1.487. 9.74 10 S 0.49PAS?3 6.4 1.30 200 250 < 0.5 284 0.68 4.5 13 111 717 6.20 10 S 0.57PAST4 26.6 1.70 1470 440 < 0.5 786 h94 2.$ • I 12S 3994 7.33 10 5 0.45PASTS 96.0 0.01 7560 360 • 0.9 994 0.20 28.0 24 995 7107 ?.83 20 8 0.2520 0.52 1335 • 1 o.o720 0,41 1520 • I 0,0630 0.54 1615 ] 0.0930 0,76 1695 • 1 0.06? 0.0624 740 10215 3 6 0.02 10 • 1o 49 870 8848 600 734?S 4 9 o.ol 50 < 10 27 395O 224016 810 44625 3 15 • 0,01 SO < 10 36 50 14906 920 ?38 11o 3 31 • O.Ol 50 < 1o 30 50 6483 360 2.6O% 140 2 17 0.02 70 < 10 18 1010 9588PA576 67.2 0.90 4140 90 • 0.$ 1260 0.23 4.0 48 198 2.351¢ 12.81 10 8 0.4310 0.23 ?06PA377 61.0 0.41 >10000 220 • 0.6 050 0.18 >1o0,0 64 $60 0500 9.64 10 ? 0.1910 0.09 265PA578 46.2 0,01 375S 110 • O.S 1266 0.10 3.0 14 229 0000 9.61 < 10 2 0.1910 0.09 230PA$?3 i0.6 O.?S 2710 130 < O*S 2324 0.03 < 1.0 1 177 1017 5.54 10 • I 0.3810 0.09 40PASSG 110,4 0.30 >10~00 630 < O.S 1790 O,OS 3.020 562 1.68% 9.10 I0 < I 0.17 • 10 0.02 190• I o.o,Ie 0.0733 0.041o O.lO16 0.0411 400 9?4 415 3 6 • 0.0| 40 • 10 16 • 50 199813 170 1862 195 < 1 20 • 0,01 ?0 10 3 ?0 1.00%12 370 3798 115 1 20 • 0.01 < 10 90 ?0 80 4684 490 492 70 < 1 41 < 0.01 10 • 10 14 110 BO10 • 200 3800 1005 2 23 < 0.01 30 20 6 2100 1042PASGI 10.6 0.92 29?9PAS82 14.0 0.51 >10000PAse3 42.0 0.09 >10000PASS4 J0.6 0.14 >|0000PA585 40.4 O.~S >~Ot~O0920 < O.S 464 0.2? 1.060 • O,S 1400 1.00 9.020 < 0.6 1120 0.20 19.0440 • 0.5 9O0 3.03 3,0130 < 0.5 350 0.07 < 0,65 149 5513 3.08 < 10 1 0.$1 20 0.21 5356 261 1.22% 4,74 • 10 • I 0.33 10 0.10 62531 492 2.64Y* 0.07 < 10 < I 0.02 • lO 0.01 450IS 390 1.20~ S,22 < 10 • 1 0.02 20 0,43 18959 ~? 1.42~t. 3.16 30 • ] o.26 < 1o 0.o$ 13066 0.06ts 0.0413 0.039 0,O464 0.0311 360 168 320 1 26 0,01 20 20 19 40 3944 • 200 2794 1075 ~ I 6 • 0.01 30 10 2 • sO 172919 • 200 1972 529 < 1 3 < 0.01 • 10 10 2 < $0 3092? • 200 400 295 < I 328 < 0.01 < 10 < 10 I 5o 98213 600 9496 900 J 39 < 0.01 30 • 10 15 100 366PA566 4.0 4.79 1120 290 < O.S 16 0.18 < O.SPASO? 5.2 3.81 52OO 340 < O*S 22 1.94 < 0.9PASB9 59.4 0.47 >lO000100 < 0.5 5504 3.02 • 0.6PA5B9 37.8 1.63 >10000110 < O.S 4906 1.03 • O.SPASgO 3?.2 0.36 >10000430 < 0.5 940 1.69 < 0.5? 235 2612 4.55 40 • 1 1.46 30 0.55 27551 176 9476 4.08 50 < I 1.16 40 0,39 4380t5 251 3.?8% 7.19 30 4 0,10 10 0,09 14096 324 0228 7.05 30 I 0.69 20 0,14 79031 401 1.21.%% 9,79 30 1 o,O9 1O 0.09 970? o.o?1o 0.050.0211 0.0442 0,0214 5?0 142 30 6 70 0.13 < 10 < 10 84 • 10 31214 590 1018 65 4 36 O.Ol < 1o • 10 39 • 1o 14629 200 2236 560 2 16 < 0,01 30 • 10 18 400 24869 260 1902 400 2 34 • o.ol • 1o • 10 22 60 64810 < 200 9192 1215 I 12 • 0.01 20 • 10 17 < SO 38OOPASO1 32.2 2.22 4500 200 < O.S 1349 0.15 < 0.5P0592 139.4 1.92 312090 < O.S 3180 0,05 < 0,5PA$93 63,8 0.60 >10000 1150 < 0.5 1900 0.20 < 0.5PA594 2.8 1.49 40 100 • 0.5 24 0.53 1.0PAS35 17.2 3.87 ;v360 060 • 0.5 48 0.18 < O.S13 ~19 0644 6,099 263 3.11.....~ 6.2020 420 3,42,.~ 7.009 149 3229 3.073 194 1280 5.7740 I 1.1~3 20 0.21 103030 < I 0,76 I0 9.12 14030 I 0.21 10 o,o5 15540 < I 0.29 30 0.75 47540 • 1 1.81 30 0.31 12015 0,0520 o.03S? 0.024 0.0919 o,259 660 614 85 2 31 O.O] 60 < 1o 39 < 1o 2?01o 600 1.o2~ 240 2 27 • o.01 < lo < 1o 25 • 50 59,413 400 4622 5075 2 58 • 0.01 10 < 10 12 • SO 35361o 79o 64 15 3 22 0.27 30 • 10 79 • IO 1395 450 1214 320 3 107 0.01 50 < 10 43 30 142PA5~ 72.0 0.40 3145 60 • O.S 1272 0.23 • O.SPA597 32.0 0.60 11~ 130 • 0.~ 1198 0.08 < O. 5PAS98 0.4 2.62 476 170 < O*S 58 0.35 < O.SPA599 2S.4 2.45 245 70 • 0.$ 60 0.30 O.S9 476 4391 5.6130 • I 0.05 < 10 0.02 1154 304 8121 13.74 30 11 0.38 • 10 0.04 20012 326 4000 2.7130 3 1.34 30 0.18 1oo17 176 1,70~ 7.42 40 1 0.49 20 0.35 24525 0.03191 o.o~35 0.06208 0.09? 310 4??8 340 1 19 < 0.01 I0 < 10 9 1370 4?06 450 ?49 960 2 48 < 0.01 30 • 10 45 < 10 989 460 ?2 240 2 9 0.01 30 • 10 36 10 9010 600 68 255 4 22 0.07 40 < 10 53 < so 254D15

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Io 2 0,32273 ~,go 20 2 o,oe30 0,08 845 S9 o.ls20 0.66 5025 < t O.lO1o 1.3o ZBS5 • L o+~2 170 1410 45 < ] 42 0.0l38 1040 288 5 S ~ 0,02~3 1040 ~4 5 4 35 0.20LO ~z 60 k05~io ~o? so 590PA615 11.2 2.56 25so 2.s ~4 0.Is 4+0 el 43920 0,O4 20 • 1 0.4;2O 1.22 7670 • I 0,06)3 1220 632 s ? ss o.osto ~6 ~o ZOnePA616 2.4 2*43 < SPA617 t.0 O.82 < 540 • 0,S 2 0,20 6,0 ?7 3480 < o.s < 2 0,04 1,0 3 136684 5.98 10 < I 0.29190 4.46 < 10 1 0.2920 1.37 9950 • ) 0.1520 0.o7 e?o :2 0.092? 1020 96 s ? 35 o.10~t soo 04 5 < i 4 o.oiio H9 40 706~o X3 30 s~PA618 6.8 1,1s 1oPA619 129.0 0.45 SOPA620 9.6 O,52 35IS0 < 0,S • 2 0,10 I,O 15 ?s50 < 0,5 126 0.03 l.S 1 237So < o,S 2 o.lo l,S < 1 90963 14.47 10 • 1 o.81270 4.46 < 1o < I 0,60339 10.62 < 1o < I 0.4870 0,22 1310 16 O.181o 0.02 IB5 ? 0.0920 0.07 1315 397 0.3429 1780 1752 50 4 IS} 0,02S II20 1,53% 135 < i 56 0.0116 1480 ?ooo 48 < i 212 o.olio ~6 11o SS6io 6 60 6~40 64 80 222PA621 Z.8 1.02 10PA622 9+O 2.33 < 5PA623 3,4 3,$3 < 5PA624 0,8 0,/4 ~SPA62S 13,6 0.69 255?o < o,s • 2 o.0s 0,5 3 12067 1.32 < 10 < I 0.58 20 0.10 62085 0,06 is 180 1842 5 2 67 0.01260 < O.S • 2 0,21 1.0 19 317996 >15,00 10 • 1 1,23 110 0,67 154020 0,25 37 2030 1700 *5 g 222 o.o5170 < o,s • 2 0,57 0,5 10 32s? 9.05 20 3 0,3O 20 0.96 120< t o.21 14 9~t0 6~ s t3 sz o,~e80 < 0,5 22 0,16 1.5 3 17o 157 >1~,oo 1o • I 0,19 20 0*07 3925 595 0.04 33 t910 5~04 tes 4 92 o.o~100 < o.s ~2 0,30 2.5 17 ?0 60 >15.00 10S 0,25 30 0,13 6.9O% 202 0.07 31 2100 [106 lOS3 3lY 0.03io 25 io I)81o 7= so 79~20 ~14 ?o I76)o 7~ 200 soo20 I0 94 200 4)0PA626 33,90" 0.12 2040PA62F 16,4 2,17 4060 < 0,S 2280 0,16 >100.0 < I 268 6,20~ ?,94 < 1o310 < o,s 14 1.65 2.0 38 244 862 5.48 1o? 0,05 < I0 0.04 ?15 14e 0.03 Ie 200 2,00~ esos4 0.40 30 0.68 3,02% 33 0.22 3q 990 RO lO20 o,oi4 20g 0.0e30 16o i89 so 8222io ~o 1o8 30 282~620 125,0 0.2~ 38I~o < o.s ~ 0.09 l,o ~ % 156 177 1~.~ < 1o < I ~.sl 20 0.0~50 52~ o.~o i? 1530 SS?8 ~as351 0.0120 lo ) ,0 ~40PA629 2,4 3,94 20p063o 1o,6 0,13 < s3@0 < 0,5 6 Z,s0 < 0,5 18 154 47 5.62 20 I 0.23 30 1.7210 < 0,5 < 2 0.04 • 0,5 57 410 47 >1~.00 < Io 3 < 0.0} < io 0,02360 < I o.46 ?9 165o ~6 s20 • l 0.03 13 290 < 2 s3 2;9 0.26~ o.o~~o io Is? ;o ?o1o 1o < I ioo 4oPA631 2.0 0.O6 < 520 • O,5 2 0.0S < o,S 5 234 log 2,92 lO < l 0.03 30 • 0,0120 z 0.03 q so o.o)~ seo :o < L [o iaPA632 65.80~ 0,09 64520 < o,S 100 0,04 35,5 24 337 3,83~ 9,19 < 10 IO 0,02 < 10 O,Ol45 5847 0.03 ?o 200 ) Ioooo 6~mo2 t 0,o140 ~0 • I so io.~PA633 27,8 0.90 495210 < 0.5 16 0.33 6.5 6 134 40 1~,21 20 • ~ 1.2g 30 0,153n 30 z? i)o )~6PA6)4 5O,4 o.70 >]ooooPA6)S 25.[0" O,53 8508100 < 0.5 98 0.67 >100.0 19 165 813 >15,00 l0 I 0.33 1o 0.12450 • 0.S 80 0,33 57,0 3 260 lm37~ 4*00 < 10 • 1 0,1o 1o o,o5640 o,os i~ iOla 630~ BIO$~s e~ o.os ~4 ~oo I~.~0~ sooI sol o,o2?o 3o i06 )~o n4~io 1o 12 iso i04PA636 12,8 0,30 49OPA637 3?.0 1,80 33SPA638 7.2 1.90 4030 • o.5 14 o.17 3.0 < I 256 2? 0.34 < 1o11o • o.s 30 o.57 3.0 21 150 119 14.40 1o40 < 0,S 24 2.46 1.5 36 71 6089 5,55 104 o.o? • Io o.o6 los 6 o,o) 3 soo 4~o isI 0.60 20 0,73 460 I 0.:? ~4 1:60 1002 306 0.24 30 1.06 935 iz o.o~ ~i 1200 I)o 5i ~5 < o.oi; 2ni 0.04io s~ o.17io ~o )9 ~o i]420 io ~o~ 90 ~9040 1o 134 io 414PA639 9.6 1.?S < 530 < O*S 32 3.66 0,o I82 IO4 02o2 6.75 205 0,23 40 1.73 950 • I 0.07 )e 910 94 58 sl o.o~60 [o ~ 1o )O4PA640 10.B 1.63 < S40 < o,S 40 3*27 6,5 35 122 I,47% 6.67 1o2 0.21 90 1,61 935 73 0.09 2? 800 290 sa 03 o.io20 i0 104 So e~4PA641 92.2 1.29 < S2o < 0.5 120 3,69 26.5 112 173 3.06~A 8,29 < IO1o 0*]8 30 0.93 1130 453 0.05 39 600 1892 156 30 0.0210 Io 86 so 2884PA642 6,4 l+SS < 550 • o.s 20 0.44 0,5 25 226 l.lFX 2.05 1o3 0.23 20 0.65 400 66 0.04 ? 600 60 52 4~ 0.0220 lo i? so 31oD16m m m m m m m m m m m m m m m m m m m

m m m m m m m mm m m mm ,m m m mmAppendix D-Patagonia Mountains-Canclo Hills Unit -contin,Sa¢llp~e Ag ~t AI B8 Be BI C8 Cd Co Cr Cu Fe Ga Hg K La Mg Mn Mo Ne NI P Pb Sb Sc SI TJ "[3 U V W ZnNuml~l" (Ppm) (Pet) (Ppm) (Pp~) (Ppm), (Ppm) (0¢t) (Ppm) (Ppm) (Ppm) (P~ (Pct;I (P'pr~? ~Ppm~l I[PCt ~ ~Ppm;i (pct~ ~Ppm) Ippm~ (pct~ ~PPm7 (PP~ IPPm~ (PP~7 ~p~m~ ~ppm) ~Pct 1 (Ppm~ IPpm~ ~Pp~) fPpm~ ~Ppm~PA643 22.0 0,13 23 10 < 0.5PA649 24,2 0,56 100 60 • O.SPA645 18,0 0,20 325 290 < 0.560 0,04 0.5 114 343 2.11Y. 7.03 < IO < I O.O6 < 10 0.0100 0.07 1.5 48 256 2.e~f. 8.50 • I0 • 1 0.19 10 0,0610 0.04 1,5 < 1 327 sos 5,57 • I0 5 0.29 10 0.0120 306 0.03 12 < 2OO 12045 • 1 3 < 0.01 < 10 < 10 • 1 < so 184225 4?3 0.03 < 1 1200 91885 2 13 < 0.01 20 80 10~ < 50 33645 1226 0.o4 • 1 570 988 395 < 1 52 < O.01 20 • 105 20 20PA646 48.4 0.25 350140 • 0.S 88 0.22 4.0 9 120 5225 e.10 10 6 0,35 1o o.o8335 499 0.04 7 510 2218 800 1 26 • 0.01 20 • 1oS < 10 2~05pA647 13.4 1.04 12060 0.5 92 0,25 1,0 21 102 7218 6,16 10 2 0,33 1o 0.1645o 1235 O.Ol 6 690 1130 40 1 19 < o,o1 30 4020 < Z0 1194pA649 12.6 1,13 IS20 < 0.5 60 0.27 7,5 2? 177 1.00~ 3.46 IO 4 0.28 10 0.30250 454 0.02 16 4oo 630 15 1 9 o.o1 20 1oZ~ < 50 602PA649 22,2 0.50 8020 < O,S 306 0,12 IO,S 49 172 9000 S.30 • 10 < 1 0.10 • 10 0.0795 102~ 0.02 21 90 968 135 I 3 • 0,01 • 10 10• IO ss6PASS0 7,0 0,68 2020 < O,S 40 0,13 • O,S 28 176 4228 1,~8 10 0 0.20 < 10 0.22175 166 0,02 10 23O 256 25 1 s • o,o1 20 2017 < 1o ~3ePA652 43,8 0,96 • $30 • O,S • 20 0.17 • 0,5 15 99 9.59'/. 9.96¢ 10 < I 0.30 10 0.36 200 516 o.ol15 0OO 220 53 S < 0.01 < 10 20 10 150 632PA652 10,0 1,04 6030 • O,S • 20 0.21 < 0,5 23 147 1.12Y. 3.0510 < I 0.39 1o o.31 185 079 o.o115 200 204 851 6 • O.Ol 20 1o 23 • S0 696PA6S3 5,8 1.37 3920 < 0.5 20 0,29 < 0.5 15 100 7239 3.0110 3 0,36 IO 0.46 255 1142 0.029 430 130 S2 10 0.01 10 < 10 35 < 10 208PA694 13.4 1,46 165270 0,5 30 0.92 1,5 20 1oo 0508 1,9820 7 O.75 1o o.14 155 186 0.026 440 418 3051 19 < O.Ol 40 < 1o 9 < 1o 51BPA655 1S.O O,96 6000 < 0,5 100 0,86 < 0,5 25 134 l*3mm.,~ 5,941o 6 0.52 1o o,1o 315 467 o.o119 400 140 601 9 < 0,01 30 < 10 6 < 50 220PAOS6 17,4 1.03 40PA657 11,4 0,94 330PA658 2,2 1,76 45pA659 |,4 1.53 40PA660 20,2 1,25 4500 0.5 < 20 0,23 • 0.5 ' 18 104 1,63T, 4,36 < I0 < 1 0.40 10 0,17 460 542 0.02? 400 252 1560 • 0.5 28 0,18 • 0,5 20 102 6928 4,50 • 20 12 0,30 10 0,07 350 1083 0.025 370 270 1610100 • 0.5 • 2 4.95 0,5 10 24 1560 2.48 30 S 0.58 40 0.50 1220 28 0,06 • ; 520 120 3560 • 0.5 4 0,43 < 0,5 20 25 4?64 3,27 • IO 1 0.25 20 0,76 370 16 o. I1 • I 870 166 1o40 < 0,5 40 0,38 • O,S 34 6S • 10000 2,14 10 • 1 0,35 10 0.30 360 329 o,11 • 1 • 2oo 738 351 e < o.01 30 < 1o 1o < 50 6O41 31 < o,o1 1o 2o 1~ < 1o 3523 68 O,Ol < 1o < 1o 34 < 1o 1323 2~ 0,15 < 10 < 10 65 < 10 ~041 24 < 0.01 < 10 < 10 20 ¢ 50 274pA661 13.6 0,55 < 530 < 0,5 < 20 1,39 • 0,5 25 ?2 • 10000 2,74 < IO < I 0,23 10 0,20 305 550 0.o3 • 1 • 2oo3625 I 14 < 0.01 < 10 1014 < 50 S92PA6~S2 6*2 0,78 45pA66~ 4,B 1,31 < S20 < 0,5 < 20 1,61 • O,S 2 57 9997 1,62 IO < 1 0,36 10 0,19 130 17o 0.03 ¢ 1 • 20020 < 0,5 < 2 3,63 • 0,5 2S 37 3973 3,$4 20 2 0,28 20 0,92 560 28 o,II ? 67015012095 < I 29 < 0.01 < 10 so5 2 43 0.02 10 101o < so 10253 • 1o 150PA664 6*4 1,03 3O40 < 0,5 20 1.10 • 0,5 104 45 3839 4,74 • 10 2 0.32 20 0,59 320 12 0.05 ? 590S415 2 20 0,03 < 1o • 1o33 • 1o 210pA665 8.4 0,49 9 < 10 < 0,5 • 20 1,12 < 0,5 ?379 • 10000 5.92 < 10 4 0.2S • 10 0.10 100 38 0.02 • 1 < 2OO16020 1 13 < O.Ol • IO 103 < 50 I174PA666 3,4 0,99 5520 < 0,5 ¢ 2 0,79 • O.S 14 S? 4655 1,54 • 10 • 1 0,45 20 0,22 185 3 o.o7 • 1 35028 001 25 < o,oi • Lo < I0 S • 1o IS2PA667 17.8 1,09 26520 < 0,5 < 20 0,91 < 0,5 106 40 • 10000 14.22 < $0 < 1 0.41 20 0.301s5 S$S o.03 9 • 2OO116 6502 44 < o,oi < IO • 1o 22 < SO 934PA668 5.6 1,42 10030 < 0.5 0 1,00 < 0.5 57 63 5503 4.51 10 I 0.49 70 0.45300 2120 0,04 2 46O50 190I 60 0.02 < IO IO 30 < IO 255P~9 2,5 1,13 IO40 • 0,5 < 2 ~,53 < O,S 21 67 2916 2.42 10 2 0.3~1 50 0.37320 813 0.06 < ! 37040 351 79 0.01 < lO 20 23 < 10 72P4670 8,0 1,48 • 530 < 0,$ 90 2,06 ¢ O,S 125 27 0138 4.26 20 < I 0,41 30 0.51345 201 0.03 15 5602OO 402 02 0,01 < 10 20 25 < 10 190PA6?I 13.4 1.12 < S20 • 0,5 • 20 1.96 < 0.5 151 42 • 1OO00 6,82 20 < 1 0,25 20 0,61355 ~I 0,06 8 4OO 6452 S~ 0.03 < 10 < 1o al < 50 272PA672 11.8 1,41 35PAS?3 0.2 1,57 < 5PA624 11,6 1.16 80PA675 1.4 1.79 20?0 • 0.5 < 20 1,50 < o.S 40 30 • 10000 5,00 10 < 1 0,39 20 0.5590 • 0.5 < 20 2,43 17,0 20 34 > 10000 5.22 10 < I 0,24 20 0,6930 < 0.5 < 20 0,75 < o,5 10 10 • 1o000 9,07 10 < 1 0,48 1o 0.2430 ¢ 0.5 8 0.99 < 0.5 03 25 2372 4,13 1o • 1 0.45 20 0.462e0 e4s 0,04 3 2OO ?4355 ISS 0.06 S 200 ?011o 181 0.02 < 1 400 226250 40S 0.02 e 6SO SO555110S2 ~8 0,02 • 1o < 1o 30 • so ze63 03 0.10 • 10 20 54 < So 343o1 59 • 0,01 • 10 50 11 < 50 3222 ~o • o.ol < Io 40 33 • I0 162PA676 19,2 0.78 2010 • 0,5 • 20 0.21 22.O 00 44 > 1O000 e.37 < 1o < I o,36 1o o,1705 1909 0.0212 < 2OO lie 220PA673 4,2 1.17 < 520 • 0.5 34 0.93 • 0.5 131 51 3058 2.46 20 < 1 0.4430 0,60 300 15 0,03? 610 140 52 ~1 < 0.01 < 10 10 30 < 10 122PA6~8 0,0 2,62 < 520 • 0,5 16 1.43 < 0,5 B ? 593 1.92 20 < 1 0.4610 0,03 400 12 0,072 ?SO 22 S2 |el < 0.01 10 70 26 10 94PAS?~ 1,6 1,26 • 5PA~ 4.0 1.25 ¢ 540 < 0.5 4 1,91 < 0.5 200 51 531 7,07 1o • 1 0.3920 < 0.5 14 2.54 < 0.5 07 18 3921 3.73 20 • 1 0.6120 0,59 385 245 0.0730 0.30 2o5 27 0.09Io 48o zoo s6 500 a4 52 136 0.04 < 1o < 1o 30 1o ~o2 36~ • 0.0~ < 10 < ]0 24 < 10 48PA681 0.4 1.53 1520 • 0.5 2 2.10 • 0.5 10 25 105 2,8810 ¢ 1 0.24 30 0.83 435 2 0,051o 690 2 S3 05 0.09 < I0 < 10 65 10 a6PA602 lo.o 1,ll 2030 < 0.5 < 20 1.73 < 0.5 69 58 • 10000 5,811o < 1 0.33 20 0,42 225 8667 0.03s 200 56 402 30 0.02 < I0 < I0 35 < 50 114PA693 6,2 2,09 15PA004 2.6 1.31 5PA~S 0,0 1.40 4030 < 0,5 10 ~.31 < 0.5 56 30 5723 3.S430 < 0,5 < 2 1,73 • 0.5 25 60 4194 2,?020 < 0.5 40 1,18 < 0.5 14 $1 1,91% 4.9310 < I 0.27 20 0,72 300 210 0.0410 7 0,28 20 0.72 SO0 403 0,04IO s 0,3S 30 0.53 320 32 0,039 570 104 s? 550 172 1o10 400 13o 52 e8 0.02 < 10 I0 42 < I0 L302 43 0.01 < 1o < IO 40 < IO 1502 103 < 0.01 < 10 10 34 < 50 400D17

Appendix D-Patagonia Mountains-Canelo Hills Unit -~ontin.Sample Ag AI AS Ba Be BI Ca Cd Co Cr Cu Fe Ga Hg K La Mg Mn Mo Na NI P Pb Sb SG St Ti T) U V W ZnPA686 ~ O,3 t,47 < 5PA687 6.4 1.31 $0?A~8 5.6 1.70 5O50 < o,s < 2 1.63 < O.S 17 86 230 2.5s 30 < 1 O,23 20 0.00 435 26 0.11 17 65oio 0,5 40 l.lo < 0,$ 31 50 I.O71~ 3.35IO 6 0,51 20 0.57 375 )2 0.02 12 8OO30 < O,S 28 0,84 4,5 15 ?1 2368 3,13 1o < t 0.42 30 0.63 300 43 o.oz 13 65042 5320 20586 52 7S O.Oe < I0 10 61S2 < 0.01 < I0 lO )2Z 70 • 0,01 < I0 10 41S0 63410 1026PA6e9 1.6 1.01 165PA690 0,2 1.67 IS10 • o.5 4 1.60 27.0 16 Sl 1524 2,19130 0,5 2 1,44 • 0.5 11 55 289 2.81IO 1 0,49 30 0,27 335 t o.ol 5 55020 < I 0.48 20 0.76 485 18 0.05 4 760274 12004 5I 37 < 0,01 < 10 I0Z ee 0.02 < Io Io11~410 146~10 lSaPA691 O.Z 1.43 3540 < 0,5 < 2 2,34 < 0,5 7 63 4?3 2.6820 l 0.48 30 0.69 405 30 0.04 13 660S0 539 O.04 • 1o 1o54 10 SOPA692 16.2 0,72 2030 • 0,6 40 0,82 2.5 181 77 2.6.~.~ 6,98IO 2 0.31 I0 0.36 305 402 0.02 26 200252 S19 0.o1 < I0 13014 SO 1336PA693 2,4 O.9O 2SIo 0.5 26 0.61 < O.S 54 59 3746 3,45to < i o.4s 20 o.28 235 21~ 0.02 9 ~2086 25is O,Ol < 1o 1o14 10 250PA694 17,6 0.47 430io < O,S 20 0,6l < 0.5 9 92 1.24~ 2.11IO' 8 0.27 I0 0.I0 130 5;3 0.02 6200 488 109513 o,o1 < Io 207 50 674PA696 17.4 0,57 5O1o < 0.5 60 0,63 < 0.5 332 73 3.13"A 6,611o 6 0.34 < 1o 0,16 140 1834 0.02 15200 868 II013 0.01 • IO 20iI so 614P~696 15.8 0,~9 3O30 < 0,5 < 20 0,?7 < O,S 41 99 1.67Y. 3.281o 9 0,33 10 0.19 175 911 0.03132~ 1~8 209 O.Ol < 1o 30PA697 10,70.~* O.O8 < s1o • 0.5 2440 0.20 < O.S 1255 95 9.660 >15.00 < 1o4 o.o~ < IO o.oi • s 65 • O.Ol a32OO 1.63~. tO3 0.01 < IOLO < I < 50 552to • o,s 6o l,;t < o.s 13 53 l.&S~ 3.01 1o 6 o.~sio o,os 3to 4o5 o.ot s2OO 236 i)oI~ < O.Ot < 10 10• < 50 226PA699 24+6 0.32 5S90 • o.5 60 4,06 < 0,5 93 98 4.3S'~ 7.15 20 < ~ 0.201o o.o9 275 6es 0.02 62OO 340 so44 ¢ 0+01 ( lO I00s 70 ~508PA?O0 10,6 0,59 < 520 • O,S 60 0,53 < 0.5 59 13) 2,4SY, 4,79 • lO < 1 0.2010 0.19 160 960 OmOl 142OO 256 ZS7 < 0.01 < lO 20L3 < 50 440PATOI 17.4 0.68 2510 < 0.5 40 0,20 < 0.5 30 133 1.20~ 4,33 < Io < 1 0.2010 0.29 175 314 0.02 g 200 352)o g < o.ol10 I016 50 270PA?O2 ?.6 0.67 Z5lO < 0.5 10 0,24 < O.S 28 97 7837 2,15 • IO 8 0,301o 0.16 lOS 713 0.02 4 170 10860 ~ 8 < O.01I0 3016 10 270PAT03 3,O 0,06 2610 O.S < 2 0,24 < O.S~9 96 506e S.~ < 10 Z 0.3320 0.28 165 I001 Om02 32 4~ 106 2010 Om0lI0 30 17~o 372PA704 S.6 0*67 < 510 < O.S 14 2,5Y < O.S9 101 s6a3 1,81 10 < 1 0.3020 0.22 305 1183 0.02 IO 260 190 2519 0.01l0 I0 17Io23OPA?05 G,6 1,02 1020 < O.S 20 0,52 < O.S19 61 1.34~ 4,29 < 1o 4 0,2620 0.60 300 1862 0.03 12 600 202 513 0.01I0 I0 3950 ~64PA?06 7.2 1.13 < 5PA?0? 18.4 0,91 17oPA?O8 ?9,0 1.34 12020 < 0.5 20 1.54 2.S300 • 0,5 4o 1.93 < 0.5190 • o,fi 98 1,72 4,021 77 4687 ~.08 10 < 1 0.2223 172 1,99% 3+31 20 2 0,3341 S# 4278 a.33 lo s 0.4220 0.71 410 2~1 0.oz 16 S?0 6~0 ~oio 0.32 545 57~ o.oa ~ 200 7~0 l~sIo 0.30 495 2393 < o.ol ~o 6ao 4.o6y. 3052 30 0.022 20 0.02g 43 0.02I0 70 ~620 LO 23io lO 70Io 54850 190l0 326PAT09 1.4 S,85 125860 I,o ~0 2.54 < O.S30 170 771 9,43 30 3 1.3230 ~.40 lSa5 4 0.16 ~S 2~q0 za ~534 SS 0.22i0 10 19~Io 350P~710 23.0 0,~1 ?S550 < 0.6 26 t,)t t.o30 Omk) 3~0 250 0,~2 12 250 6130 k15I 3~ 0.01~0 ~0 $I~o t~2PA?ll 66,0 0.4? 430360 • 0.5 62 0.09 25.512 137 4544 1,45 1o 13 0,19 < io o,Io?5 271 0,02 5 60 9960 1040l 12 O.OI20Io B Io 51oPA)I3 4.2 1.14 2SPA?I3 40,4 0.73 130130 • 0,5 6 1.32 3.5490 • 0.5 IS 0,23 6,57 98 433 1.69 20 1o 0.44 40 0,2010 7? 1230 1.71 < IO 6 0.50 io 0.14265 ~ 0.03 7 360 576 50145 226 o,os e 510 1312 205) 16 o.oi5 14 0.01to20to L5 Io 270IO 37 Io ~o6PA714 3,2 2.10 • S 1300 < O,S 4 2,40 1,S30 66 166 S.Ol20 2 o.s1 30 1.03875 9 O.lO t7 1040 60 IS12 42 o.ls201o It4 1o 96PA715 134.9 0,32 430 20 < 0.5 38 0,71 59,034 177 6054 1.6810 Z7 0.08 1o o. ls$)s 925 0.02g < 1o 5626 I565 < I 7 o.ol20to e to 920PA~I6 7.4 1.24 10170 • 0.5 < 2 1.65 3.0 12 64 461 2.6520 6 0.16 0o 0.55 (00~ o.os II 6~0 ~'12 602 45 ~,lOio ss 15o 156PA71? 2,2 1,41 < S80 • 0,5 4 0.70 0.5 19 73 425 4.9710 e 0.22 20 0.76 56S~l o.os 1~ I~so Io~ to8 32 G.L9IO i~e < io RoPATI8 1,6 1,12 < 5IOO o.$ Io o.se < o.s Is 67 205o ~.9020 e 0.3~ io 0,6~ ~o131 0,04 Iq S60 l~n 153 23 0.12in ,s 4~o ?1~P~719 120.4 0,36 '5640SO O,S ~]4 9,60 >1oo.o 87 IS5 3,20~ 13.4140 1 0*It 10 O.l] 21650.03 s t~oo lye.. ~05o) 5~ O.OlI~ Ifl , 5Q 4.a~%P~?20 126.2 0.27 47651o 1.5 580 10.35 >IOOmO 2~6 13] 2.g7Y. [1.30~o I 0,02 IO 0,19 ~59~l 31 0.01kO 15 15e h ~.~0~.~121 16,3 2.14 S40 6600.5 136 ~,~ s~.o 3o~ 9~ 21~2 ~,25~ ¢1.15PA722 10,2 0.60 240 50PA723 173.8 0.96 >1oooo lsoo.s 70 9.45 >100.0 105 IS2 4~95 ],11OmS >Ioooo 2,03 >I00,o 97 91 3.00~ >Is,oo30 < I 0.04 IO 2,4~ 2~SS60 2 O.25 30 0.O~ 26~0i o.o2 ~ 2q~O ~s~ s0.04 13 3000 1.0t.% 19152 16 ¢1.024 3g 0.011o 50 4o ~.?~.1o 153 • 50 1.44XPA724 53-2 ~.00 3210 ~0O.S 820 S.86 61.5 136 6O 2,7~ff, 9.8960 < I o, le 3O 0.44 S6056 0.32 l[ 1600 22~ flfi~4 53 O.Ogi0 36 ¢ 5o 1.677PA725 59.4 0.26 49~0 • io0.5 140 11,62 >100.0 250 65 4.21m~ 10,5~60 < I 0,02 • 1o 0.06 40651o o,o) lO 1600 1104 1620) 34 0,0[I0 XJ 100 11,4~.PA726 ?4.0 0.61 200 < 1o0.5 360 1.76 24.0 30 4O6 > 1oo00 8.2940 < 1 < o.oi IO 0,09 1585164 0.02 io 6Do 3ooo 402 2 0.0110 16 qso zJ~PA727 159.2 o,10 iio 70O.S 040 3)92 >IO0.O 19~ 242 3,0.m.~ 6.7?ao < 1 < o.ol 1o o.oe 6t40~7 0.0~ L6 1000 (.~2V. 52 14 0.011o e 650 16.~0"r.PA726 7.99_ ~ 0.85 235 IO0.5 1160 fl,02 >100,0 41 123 2.22~ 11.62~o < I < o.oi < IO o.~6 ~4606 0.04 t0 1~00 ~.14~ s4 31 0.0410 ~g 50 5.441PA729 170.4 0,43 240 < IO o.s 600 g,~O >1oo,o 16386 S.02~ 12.4440 < I o.oi < 1o o. lo 711586 o,n2 19 1ooo 4,61~, 53 12 0.01D18m m m m m m m m m m m mm m m m m m n m

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IIIIIIIIIIIIIIIIBoundary of PatagoniaMountalne- Canelo Hills UnltPatagoniaMountains/ \r~ Pe-JPe-JQ-Tel"13o b "~~a TTr-J-KvJo.-.a •fa /I ° ~,~Tr-J-KvK -TvQ-Tatt Tr-J-KvI!I/IIII\/Ps/o~_-Lh\\_%%,, O%o_\oTr-J -KvO-Tal-N-"k~ \\\ff///\/\\I/JQ-Tal°~/a ITK-TvTr-J-KvPsP6-JeeEXPLANATIONalluvial/colluvlal malerialb-breccia plpe (not shown on other maps)a-alteration area in Patagonia bathollthHydrothermal alteratlon zone delineatedby high pyrite contentPatagonia batholffh (Tertiary-age)Volcanic rooks (Cretaceous- to Tertiary-age)Volcanic rocks (Triassic- to Cretaceous-age)Sedimentary rocks (Paleozolc-age)Igneous, Intrusive rocks (Precambrian- orJurasslc-age)Igneous, Intrusive rocks (Precambdan-age)Generalized molybdenum highSources: Primarily, maps by SImons (1974) and Drawee (1980).Calderae from Llpman and Hagslrum (1992, p. 33). Pyrltlc zones,generalized molybdenum hlgh from Groybeal (1984, p. 188, 190).ScaleI 0 I 2 3 4 5 6 mlFigure 2.--Generalized geologic map of Patagonia Mounfains-Canelo Hills Unit.I63

I m m m m m m m m m i m m m m m m mPossibly Invincible prospec~of Schrader (1915, p.257)Priv'a.leLocation of unsampled woddnls flora Simons (1974, map),Kartchner (1944, p.88-89}, Schrader (1915, p.253-254),Courbight and Richard (1951, map).\• - "-..~.,. .. , . ~ X s,,, < 'x,\ i.,, ,: .,. i ........... J > i '''~" \ ~\" k t,< \ ",,'t ......... ""',"

P,4~1.21Rhyoll~porphyryP~420GraniteporphyryI" ;~"~- PA4,17PA416 "~S-N-PA41PA41,~P ~ ~/ ~ PA,4,14I4OI0-q40PA4.13PA4,1~ ~ Granite porphyryPA, I~~" PA40775 ftPA40575 ft raise;E.-W. driftln8, 15 ft aboveColossus level sill.PA403PA404PA400Granite porphyryStoped down4OftStoped up 25 ftPA399PA398I k P,~92PA393PA395PA390Stoped downabout 150 ft10 ft CavedStoped up and downabout 150 hPA388Stoped down ~ ~ \about 150 ft \O)U120 ftUll15ft>35 ftGranite porphyryFisure 5.-Three R Mine, Colossus adit, with sample localitiesPA 382-421, Patasonia Mountains-canelo Hills Unit.

m m m m m m m m m m m m m m m m u m m~.!r,PA376P,~75I2OI0 20 -FeetIFractured zoneO~(3)J urassic-asegranitic rockPA3~BackfillPA370',4Sill drop56ft6 ft rubble ~.bench.Backfill$PA369~. bench@ft. benchFigure 6.--West Side Mine, Gray adit, with samplelocalities PA 368-376, Patagonia Mountains-Canelo Hills Unit.

IIIIIIIIIIIIIIIIIIPA220PA222PA219PA218/PA216 J-N-I 1 I20 0 20 fee+Rhyolite breccia pipe%PA214Figure 7.--Prospect in breccia pipe, central Patagonia Mountains,with sample localities PA211-223, Patagonia Mountains-Canelo Hills Unit. ....PA212-T80PA211.... ..... i~i ~,~ ~67

J i | .... | m I I m m m m m m ~, | m mq!ii-N-i4OI0I40 %o-I-Quartzm onzonite\~l5Oi m lPA458PA459PA463i PA4620oPA461%120 ft deepFigure 8.--Prospect in breccia pipe, central Patagonia Mountains, with sample localities PA455-463.

IIIPAl 71PA172/RhyoliteporphyryJi40-N-I0I40 feetIIIRhyoliteporphyryf~aRhyolitebreccia pipeIIIII,IBreccia pipeRhyolite~ ccia pipeFigure 9.--Part of Chief Mine which intersects a breccia pipe, withsample localities PA 171-188, Patagonia Mountains-Canelo Hills UniL k. /RhyoliteporphyryI%%185Rhyoliteporphyry~PA18869t

i1..=~-IIm m m m m m m m m m m n m m m m m,,)ii!iLPA451 .~-N-/ PA449i4O 0iI40 ~eetQuartz m onzonlteI40II0 40 fee+0/PA441J~/ GranodlorltePM.~ ~ ~Andeslte• .:" ' ,:i"-N-PM38 .~ ~/'/~- "-- PM3,~*'~*'~*'~*'~*'~*'~ ~ C i v a d,~%~-/ "-,,,.,,,//\~" //Y"PA435 G llnodlol "reI I I20 0 20 FeetCcved ihiff.......--ItRilla 30 ft,to lurfLce~'~noo. ',; S'-':'Q umt~z m onzonltaFigure l O.--Part of European Mine group, with sample localities PA432-441,443-452, Patagonia Mountains-Canelo Hills Unit.i)

IIIIIIIiIIIIIIIIIiI/Caved-N-I I I20 0 20 -Foo-~Granite porphyryPA474PA473PA472PA4TIFiBure11.-Adit in uppermost Cox Gulch, with samplelocalities PA 471-474, Patasonia Mountains-CaneloHills Unit.71Z

I i i I I I I i I I I i i _ I Ii\PA228Rhyolite BrecciaAt SurfaceP~?.:Incline connects with cavedwinze, that probablyconnected with raise-N-PA229PJ~.30P,~.35./ \.j \\ .d \\ .p\\\ .../ \\ ..IPOI I I40 0 40 foe~PA233PA238Rhyolite BrecciaPA241 /P~?.42P,~.44P,~.45 -~39- PA243,iL:70 r e •//Raise is caved, butprobably connected toincline at surfacePA249PA246 --~P/~.50PA247Figure12.--Sunnyside Mine, Volcano shaft, withsample localities PA 226-255, PatagoniaMountains-Canelo Hills Unit.~ PA2483ORhyolite Breccia

iibm m i u ilm m lira ibm m i U m i M IBmml-N-PA283ThunderI2Oi0 20 fee#ipA27OStandardKhyolltepA.7.79OCOP.A.27BOipA267 ,--" ~ ~ . . ~ - - PA2~PA.276• Figure 13.--Part of the workings of Standard (?) and Thunder prospects, with sample localities PA264-271, 273-285,Patagonia Mountains-Canelo Hills Unit.

IIIIIIIIIIIIIIIIIIWrNWIElevation50004O0O30OO2OOO1000levelDH157Felsit~LaUte-°IHorizontal -VerticalI I I2000 0 2000 footModified from Corn (1975, p. 1, 444)and Quinlan (1986, p. 297)..,,..Approximate upperlimit, strong potassicalZeration.jDH146 - Drill hole numberaPart of 100 millionst copper resourceDH151DH144 I ~ H I ~ _ . _ DH158DH156 .I--~--------~ ~ Tuff ~• I-.~ z. alcocite blanket/ ---'-..~. ~¢.. , -~ , ,I , ./ ~":4.~.i ~ -~/_Additionalcopper resourcesAndesite(150 million st 1).Figure 14.-Generalized cross section of the Red Mountainporphyry copper and breccia pipe resource,looking northeast, Patagonia Mountains -Canelo Hills Unit.74E,SE

I-1:5:IIIIIIIIIIIIIIIII[2OI0 20 feelIPA123PAl20 -~1 ~_ "6".,) / ,,, ~ PA121-123 ~PA1 126Scale 1"-1000'(~g. ~6)I t I I I0 FEET 1000 2000 3000 4000Figure 15.-Aztec Mine group, with sample localitiesPAl 17-126,Canelo Hills Unit.Patagonia Mountains-75-N-

IIIIIIIIIIIIIIIIII%-N-~tPA125PA124Rhyolite w/hematite stockworkRhyolite w/pyrite stockworkPAl 26I 1 I2o0 0 2o0 fee¢RhyoliteOxygen level at 17.5 percentnot entered beyond hereNote: This map was mapped by pace and compass method:The mine len8th was modified from oral communicationwith R. Lenon, 1990.Figure 16.--Adit of Aztec Mine group, with sample localities PA124-126, PatagoniaMountains-Canelo Hills Unit.76

i~!~ ¸IIIIIIIIIIIIIIIIIII2O 0 20 feeFPAl13 PAl12 ~p~PAIl4PAIl1"~ "

IIIIIIIIIIIIIIIIIIIPdvate landNational "'--~,",'~'-~ ~..\( ~,~-PA95c...,,,.~ I / ,~ L. -"."~'t') ~-z'(:hdslJ nas GiftPAl01 ,,. l_~io. :~, i ~ "t~ t ':A:_"" ~Elevadon ~,~!' ~ - ~ - P A 9 9Minet~'oup .JS,%'~J";:'. J . / / .~-."~0PAl04 ~/,-:r~--L-: ~'~ ~ f,' f ",l~.J\i~'l!Oi"-"l~3"-"~ ""- PAl00PAl05 /(main adit;; not mapped)Bedrock is Terliary-age ri~yolite andLaramide andesiles unmapped.Scale 1"-2000't I I I0 FEET 2000 4000 6000 8000Figure 18.-ElevationMine group and Christmas Gift Mine,with sample localities P.a,90-105, PatagoniaMountains-Canelo Hills Unit.78~!-: ! ....-N-

IIIIIIIIIIIIIIIIIPAT0La Plala ---MinePA75 -Homesta~prospectPA89 -PAB8Scale 1"--2000'PAT9Hale # 3prospectI I I I I0 FEET 2000 4000 6000 8000Figure 19.-Minesand prospects in Meadow Valley, with samplelocalities PA70-89, Patagonia Mountains-CaneloHilisUnit.-N-79~i~ i ~ i~ i ili iill !i i~i!~iiiil~ : ~ • • • ~i/~I~

I'T'~"I ~: ,:-- ,..../ ~,~ ,' ~,...,..~,. ' , ~,, t~i~---~- ~~'-~\ ::- ~.'lI- ,,."' X, , ""X "• "" . "N i. . . . ~ '~"~J," ..~? ~ .L," /,~____1 _,.~. or, "..-.~,-.~.~, ~",J~ ~ /• --.. ~-.~ ; / ~, "~,"-~ '~ "' 'J II ~----~"~ ~ -~IIIII~;~; " ~: i .~/!~6~ ::i!~i~6iyZ! :~..... ~L~:!i~ "~ • , ~ ~ .!~ilr ! ~,~:~;~i~i~_~i~WY~:-~'~~~i ; ~ ~.~x..~x.~-'~ ~ ~i'~ ,, ._,,80IL

i i i~ i ~ ~ ~ i im i i i i i~!ii:,PrO5~P~8/////// L c~,,,,,~-N-P,&,18 !JU~Unlde t~ " I I I-N- c~ 20 0 20 leel/20 0 20 f~{z)7.~ - N -TrlchytePM1] I I20 0 20 fee+-N- Tnlch'fta PA49 " ~ P~0] I I ~20 0 20 feel aopM,,t P,~I J .... "- PA53Figure 21.--Workings of Frisco Fair claims and unnamed workings near Jensen Camp, with sample localities PA28-31, 36-38, 41-44,48-54, Patagonia Mountains-Canelo Hills Unit.

IIA-N ~I I 120 0 20 feetIIIIIIIIIIIIIIP/C5-7 -----]PAl2PAl3M~ l f~ x//, !)PA9\" ! ~ ~ ~PA14\ ~\X L '~-~" "'~ PAl 0.-13/ ) ' /L~.Bedrock is dq~oli~ and andeS, not mapp~Scale 1"-1000'I I I I I0 FEET 1000 2000 3000 4O00Figure 22.-Sansimon Mine and nearby prospects, with samplelocalities PA5-15, Patagonia Mountains-CaneloHilis Unit.82-N-

IIIIIIIIIIIIIIIIIIII0 FEEl" 1000~ ~ . . . . (fig. 25, 26)r -J / ~-

ilIIIIIIIIIIIIIIIIIGranodiorite~PA557-559PA5605260 level5090 levelQuartz monzonitebrecciaHypogene copper,5.6 million st,0.51% Cu, indicatedresource category.Hypogene coppers2.8 million st, 0.44%Cu, indicated resourcecategoryCross section adapted fromAGDC (no date, map), Bottomfi00 ft of inclined, hyposene copperresource zone from AGDC (1954 I)and Farnham (1953, fig. 8-9),Alaskite contact and nortfiem, verticalhypogene copper zone from Farnham(1953 fig.B). Resource tons, gradesfrom Penny (1965, p.2), AGDC (1954 i'),except for northern, vertical hypoBenecopper zone. Dashed drifts are projectedinto ~ction.t•Oxidized, "~leachedcap0.15% Cu* ,t~ e e,,/~ "~S~ _. st. 0.61%-- ~ ~-- -- --~A~,~:..I I I200 0 200 feet/\. . . . _17• --, Cr .~kFour Metals Hill (Red Hill)o?PA542-556from thisadit \.'~ ~ ~ 5400 level "~----- /Hypogene [ -.,copper I ~ I~\X mineralization I t !~::)F;:]:i"--"-""----------h......7;'!'v :: ,;7-tFigure24.-Diagrammatic cross section of Four Metals Hillcopper porphyry deposit, with sample localitiesPA 542-560, Patagonia Mountains-CaneloHills Unit.\///Hypogene copper 0.2 millionst, inferred resource category.Grade untested. Used weightedaverage of 2 higher zones(0.47% Cu) in calculationsI60,000 st(t), inferredresource

m n n n m n m m m m m n m m n m m m///fJf~ P~542 ~~ PA543See detailed minemap (fig.26) formore information onthe 5400 level.J// jt)///#//// #l,5260level5400levelWinze, to5260 levelPA554 ~ vPA555PA556PA550PA547~P/~48PA549PA552III.####//PA545PA546o~%°~te ,oleCc'ts.//\\\\IJ///////////// sInaccessible north of this pointin 1991 (backfall, loose rock on ribsand back, deep mud).~'-uartz monzonite breccia45Granodiorite-N-gI00 0II O0 f~fMine survey (Jan 1951) and breccia boundaryfrom Farnham (1953, fig. 3,4).Figure25~-Plan view of Fou' Metals U'ill (~ed I~):h:P;ruP°t~:tYa~s dePnejitwa ~ s2 OPA 542-563, Patasonia Mountains-Canelo Hills Unit.PA561-563(~) (on dump)Caved in 1991! i~i,i ~iTi!~iii, :..

il ¸ I I I I I I I I / / / I / I I I I I, i

IIIIIIIIIIIIIIIIIIPA754PA755 -PA756P/~53.-- "" " " 0/"% ~ ;'~ AIl~red rock/ t/// \\__-.---,. \ "....,......... .---------... ,H/. k// Altered rack~---,,,~ \Geololly from Simons (1974, map).Scale 1"--500'I I I 1 I0 FEET 500 1000 1500 2000Figure 27.-Benton Mine and Line Boy Mine, with samplelocalities PA753-758, Patagonia Mountains-CaneloHills Unit.//~-r~seP/G57/ Une BoyMine-N-~- • ~ ~i ~87

m m n m m m n n m m m m m m n n m ni '~ ~ii'iiiiiiiii~,i!,ii)!:, il ¸)Granite-N-II I I80 0 80 -~oo-I-SModified after Kupfer (1965, pl. 1 ).Map completed in December 1943•--tt3t~eASSAY DATA, IN PERCENTSample MoS2 Cu1 0.13 0.842 28.04 .153 .09 .684 10.69 2.565 1.54 .30Fault40 ft leveli/-L-- Larse open stopeJ/'~)/55 ft levelMain levelApproximateGranite~.I /!'~..i"/ (.,i ) A2 ...~,::~1 .~.( .I 55 ft above haulase levelLm =~==~ \, i, -~"_./,'~. " ; ~ 1 0 ft stopeCO036 ft deep i ~"~40 ft above haulaBe level• w:1iFigure 28.--Santa Nino Mine, Pata8onia Mountains-Canelo Hills Unit.Property not examined by USBM during 1990-91 Coronado study•

IIIIIIIIIIIIIIIIIP~O9 AoPA711 ~ iGranitep/LTI 3 " p,~714i-N-I I I20 0 20 feelPA2'08 ~PA709-714PA715 JConlour i ~ iS 80 ft.,k~0coximate geologic oontal::Is front 5imons (1974,map).J-luramioa~ 8ranilic rocks.T-(~c-mommnile phase ofTeraary-ap rocks O'aueona bamolieO.Pc-Precambdan.ap rod= (mixed fahdo~es).Scale 1"--2000'i i 1 i i0 FEET 20(30 4000 6000 8000T~P#17'16 ~' XPA717Figure 29.---Part of Edna Mine group and nearby unnamed prospects, with sample localitiesPA708-718, Patagonia Mountains-Canelo Hills Unit.t-N-89 7

i I I I I I I I I I I I I I I I I Ii!.,PA726.._P.A727Indiana-- ~iB ~~_~/ I~720~4(llniiimineNew [] ..~1-723~l~e(simj~l~__ PA724~i~1 PIMinet•\ ~ PA734 !/ P,'~3.6 ~+(.__ s~?, I p c.~o ,,L?.... ~' ".... -I,,o,• JPau~m ~51~ljoflPdde of the+ \\Tibbets Mine, ~_.-am+ .[• (m ~ '~/I Mine "., .~ Mine _×~ 1 I Pride Pri~ ofi PA737-744 - (1~1 ....... ~ / ,~ / ! ,I ,, ,, ,-~, [] ~,~P~'-'-, DoubleX _I \ ~,fi~" + ~ -X~++ [] + Standard t +'JX ~_' nn,m. _./ ~ ' ~ ' n shaft ---x~@

I I I I I I I I I I I• .I',/I I I I I I II;:ii ¸3i-N-,f.J J/'I"7 // /,J J./ /'(" f.\.,"\\,."\\'. ~.\\.." \I I t4 0 0 4 0 fee-~Modified after Schrader~ 1915..J/",-'./"./"j"~.. j'"i/./' /:60-foot level70-foot level135-foot level23s-foot level'\II\.\~..... ~i,-. li~.-~. '~..~"~.,~.,. ~,.~,.~....,..I i'~• ,, ...,~.~ -.,,. \ \"-, .... "~'.-,>..' %,,.\ \ ~'~,~. ~.."~'~."\. "\\.'\\\k\• N "\\'X"\'\ ................. "~) \~/./' /."/ //'//--~shaft,~ j J J "--- __ .J335-foot435-footlevellevel.... ) //.// /I.Ii" 1i.1i'.I .~...""::Z'.."Olo~.le " "/I"./" I" ~•/ I:ii/ (:ii\ \/" /'..................... ":.i._ Shaft No, 3_2i/• . ,'-= •, ./.J'/,f .j"f1"" J /[" .i. j", J "!'///: ,r.... I/ /, ~, ,h'i;/.. •// •#," ,•...~.Ii".i"i"./",,I"~. ././/,IFigure 31.--Bonanza Mine, plan view, with sample localities PA745, 746, Patagonia Mountains-Canelo Hills Unit.iiii~!'~:i ¸ iii.... , !

92 ~~-~i~'i~i :~*:-~ ,,L , .... ~ - i~: ~ ,~ ~ ~i~ ~ " •~i~i~i~i~i~i~i~ii~i~i!~i~i~~i!i~i~ii~ ~ii~• i• ¸¸°IIIIIIIIIIIIStopeNo.3~40-ft levelI 1 I80 0 80 feelModified after Schrader, 1915LShaft No.2 ~Main shaft Shaft No.4~Shaft No.5 ...... , ...../--PA745 Shaft No.3 ~ 1 .f•(-.-- : ~ S t o p e ,f~----l\/--t~ . J:- i.". " :"- - _ - - )L/Level No.2 (235 ft)• --I~II holesFLevel No.3 (335 ft)• IILevel No.4 (435 ft.)• I1} 70'ft levelLJNo.1 (135 ft)JLevel No.5(535 ft)Figure 32.--Longitudinal section of the Bonanza mine,looking east~ Patagonia Mountains-Canelo Hills Unit.I- -7 Level No.6 (635 ft)

m m m m n m m m n m n m m n m m nfji!ii?il) .~i!i-N-• ~ .~M a rb l eCaved,~',t "~I I I40 0 40 fee-I-Me rtical~.Qu artzite~-k~ .,. ~:xx~ Cavedd istan ce ~ L ~40 ft. /"~0'~%P'744PA743S ka r~u~'4~~~ fSkarnW ,ndowPA742 -J/\-'~'~/ \...... \\\~ L/ /" W,nze to lower level ,'~"~ I///~ stoped to surfaceSkarn --~Lira estoneVerticaldistance35 ft.PA741 ..h\Stopedup 20 ftRaise to upper levelt; "--. SkarnQ uartziteVerticaldistance60 ft.Caved-~Q uartziteiiPA737--0 re chute:!i:?!Figure 33.--Happy Thought Mine, with sample localities PA737-744, Patagonia Mountains-Canelo Hills Unit.il;~il; ¸ ,i!i~:u

IIIIIIIIIIIIIIIIIiI35--338"~ ~ ~,/ AII~ Mine [J~]~• :11 ".....,/_..--, :" "HtHermosa Hilli,/ :i~:/3-, ."\, ",, \ / Black EaRle :,': .... : ~ne :.:t PA.'342 "''! PA341 : -"- i -\//~8; 37) [] C: t j/ ", f.-, /Hardshell Silver/ManBanese mantadeposit, projec~ verlJcally to surface/-m, ~' t/ i r'.,. ,..(' ' ° e

n m m m m mm m m m m m m m n n m m m u?Extended, post-1915(see cross section).//:\CrosscutDrift apparently --~above 325 ftlevel.\\ I I40 0 40 f~et-Extensivepost-1 915stopin8 notshown. Seecross sectionRhyoliteSlopesaboveinclinetf fStoped up40 ft; allin orePS~ope,mostly in\ oreStopes and driftsabove 325 ft leveland above incline.Map from Schrader(1915, p. 269);orisinalsource scaleapproximately 1 in. to 87 ft.In danserous cenditlon(caving) in 1915.CO01Stopes above andbelow incline.Rhyolite\ )\\ \\ \\ \ ;(/,, \\\\\ (/\Probably opento surface\ /Figure35;-Hardshell Incline Mine, plan view, Patagonia Mountains-Canelo Hills Unit.//Quartzite

zi~:~i!~i~i:::!~i ~ ~W! ~ii ~ ! ~ ! ~IIIIIIIIIIIIIIIIIII /tI I 140 0 40 feetConsiderable post-1915stoping in these areas~end_ed. ~-1~\ / ...- /Jf" /- S Ddftfi 325-foot level . . . . . . . . ./ I l ~ / / \ \.f \ \/I/Il- ~ " t/ Stoping ~/'ttII off t/ /t 500 ft slevel\/•., .I,"Post-1915\\Considerable stoping inthis area (post-1915).Figure36;-Hardshell Incline Mine, cross section on main inclined shaft, (looking east),Patagonia Mountains-Canelo Hills Unit.Stop~1- //////Sto~Sto~J'~-~Considerable stopin8 inthis area (po~-1915).Not examined by USBM. Source maps:Schrader (1915, p. 267), 1 in. to 83 ftlKoutz (1984, p. 214) for post-1915 work only~1 in. to 120 ft.96Portal ofIncline shaft

m n m m m m m mm m m m m m m m m m/ii!~ ~:=Cavedin 1990-N-RhyoliteRhyoliteI I -14 0 0 4 0 feetModified from AGDC (1957, map) andFarnham and others (1961, p, 167).Originally mapped at 1 in. to 50 ft;sublevel and open cuts at approximately1 in. to 165 ft... ~ Stoped downRhyoliteChertf'-,-./t.._.Chert\Raise or winze; ~unknown\\Sublevel\ Stoped up~ ~and downto sublevel?Inaccessible workingsin this cut connectto underground level(as of 1957),Stoped up and down 15, ftsite of WW II manganeseproduction.LimestoneChert andlimestone\ brecciapA344 ~(approximate)~OOpen cuts aboveFernando tunnel(sites of 1952-1955manganese production)LimestoneSandstoneFigure37..-Bender Mine, sudace and underground (Fernando tunnel), with sample localitiesPA 343-344, Patagonia Mountains-Canelo Hills Unit.i!~i li) ¸¸ii!i/ii,~i!iilill ~

I I I I I I I I I I I I I I I I Ii>,: [!~, ~i I7ii~; .'! "%,o t '~ ~_-.._ ~__._ ..!and alluvium (unmapl:~d)' * shaft ~ ~ ~.. /' _~,,....... i, ~ ~ ........... 11% MIv "F --. . . . . . . " '" ~ ~ ~ ~ ~ ~ "7" ~ East End , ~. / ,= .-na............. -, / ''i ) f ,-~- i~% ,haft, /p fault.... .,.. / .,i ," ..~//" ., ...... ~ / ~_ intersects ~6~// /'\,'~ .... ' / I/" ~1 "% '.............. , IX, ......... / ...r-'' / ~ ~ I Z~rox'~'~ = -160 if, (f 1',...... . ...... .,..."" f/ _.i~¢" Beyerle pit "~% " tl \.....'". / .MeXican-7 II " ~ " " ~i sh~ (Mn) , , "~ : \ \ , Zi\ U !..~ West I ~7 []/~ " ................ ':' \\ '"'" ~...,fl , \ .......Sedim.e.nl~ro~\U/l ,I ~ \ ' \ )oo \\ ~ " .............."

IIIIIIIIIIIIIIIII2~ ~ 2'o ~o~PA3----// "- PA313 Quartzite" " ~ P,~317/~j ".PA315Figure 40.--Prospect on manganiferous structures, with sample localities PA312-317,Patagonia Motr[tains-Canelo Hills Unit.99

i m i i i i i i i i i i i m i m i ii ¸~\."\ \'"~ ~'0,....I Q I jm ~ I m• M =~ 125-ft level• ,,,, -\ e/\. "\\. "\\ •"~ ~,.~. "\~.\Quartzmonzonlte.,~.." :"•-:, .:: •::t~Limestone,, 1 LimestoneHistorical orezone on260 ft level-N-I I I50 0 50 feet//FJSource map from Schrader(1915, ph18),original scale 1 in to 105 ft.Fault name from Simons (1974, map)!?!LimestoneFau It100 ft level125 ft levelAplite70 fi levelOpen cutU U W g U m I B U ~ ! I U D ~..J=OLimestone260 ft levelApliteLimestone%Quartzmonzonite ,Limestone~ /~ PA141(approximate)Figure41r-Part of Flux Mine workings (up to 1913 era), withsample localities PA140-141, Patagonia Mountains-Canelo Hills Unit.iii:*~i ~ •

IIIIIIIIIiIiIIIIIIIW ]nzeraiseandI2O-N-PA327Figure 4,3.--Augusta Mine, with sample localities PA326, 327, PatagoniaMountains-Canelo Hills Unit•101I0I20 feel~ x ~¸

IIIIIIIIIIIIIIIIIgroupWieland group I-N-I ] I20 0 20 feet Lead Queen mineIt 18h|y-alteredAnde$1te porphyry[~/~FA14~ I~.PA157Andesite porphyryPA162PA154 -~Scale 1"--2000'I I I0 FEET 2000 4000Figure44;-, Wieland and Buffalo groups, with sample9,~.~°A147-149 "---I1localities PA146-168, Patagonia Mountains-CaneloHills Unit.Basin No. I prospectPA160-161PA163-166Great SihlerMine-c~ Dewe/prmpect(Ioc=ion appr~mate)I6000]8000-N-lo2

II!IIIIIIIIIIIIIIIIIPA2~--12 ft. deepRhyolite porphyry-a-I l l20 0 20 foefPA290P/~91I201 t0 20 feelPA296pA297pA298out~ ~ / ~ 20 ft above sillFisu re 45.-- Part of Humbolt Mine and nearby prospect, with sample localities PA289-293, 295-298,301-305, Patagonia Mountains-Canelo Hills Unit.103I I I20 0 20 feelRhyolite porphyry~BackfallP/~01 -~ ~'!

IIIIIIIIIIIIIIIIIIPA346 -~PA347/Rhyolite/P~48I20PA349-N-10I20 fee-t-RhyolitePA350Figure 46.--Mary Cane adit, with sample localities PA346-350, Patagonia MoL~ltains-Canelo Hills Unit.104 ~=!i ¸

IIIIIIIIIIIIIIIIIBuenaVistaMinePA646-657(fig. 49)PA658-706(fig. 48)/..~ - ::~/~...... ~ i ~ ~ / / / / i:'~.rJ I//,i/ ....\ '..:/ .[]t ~ PAT07/!Vein mapping from Simons (1974, map). Vein exlm~both NE. and SW. of this inset map, for a totallensth of 3,500 ft. See plate 1.Scale 1"---500"fYf/y//~PA642- PA643PA644-645I F ~ t t0 FEET 500 1000 1500 2000Figure 47.-Kin 8 Mine and Buena Vista Mine vein, with samplelocalities PA642-707, PataBonia Mountains-CaneloHills Unit.tKinBMine-N-_. 105

| m m D B H n B H | i | | | | m m/: ('~i!il ¸i-N-Down 30 ft?/i4OI0I40 feetStoped 12 ft ~f/?/GraniteStoped 25 ft ----,,~, //Stoped 30 ft -.,Stoped 20 ftPA653PA654Stoped 12 ft~JGraniteStoped 40 ft////I/tJPA650Timbered\Stoped 25 ft///GraniteStoped 12 ft---~/iIII I/BackfallGranitePortal elevation is 145 ft above the lower adit portal,according to 5chrader (1915, p.315).Figure49:-Buena Vista Mine, upper adit, with sample localities PA 646-657, PatagoniaMountains- Canelo Hills Unit.~i~ ~!i';I~ ~ :i i!~i~I!~ :il !~:!i!:i:':

IIIIIIIiIIIIIIIIPA521-526Enterprise Mine(fig. 51)0 FEET 2000I~-PA518 ~.. ,"~% Segment of Jackalo-Paymaster[~.~\ Ho~ Mine "tP /-vein, from Simons (1974, map).I- "~-~p^519 ~Vein continues both NE. and15400' ~ ~.~S60Oo PA52~I ~ SW. of this inset map.---,..L'~"':.~ \ XJ" See plate 1.P~S2~:528 ~ ~--~_ 7.~, // tj ~f$ ~jI

IIIIIIIIIIIIIi!|III20 0 20 #eelP.~21 \GranitePA522IPA524PA526 ~ ,/PA523winzeFisure51.-Enterprise Mine, with sample localitiesPA 521-526, Patagonia Mountains-Canelo Hills Unit.108

i''IIIIIIIIIIIIIIIProntoMineI PA582P/~583-584PA585-586PA587-589PA590PA592PA593-594Gladstone MinePA599-600Southem segment of Jackalo-/Paymaster veTn. Extents NE.P,~564 -~O I of this inset map. See plate 1." • , " ~ ' ~ A 5 7 1 - 5 7 7 Jackalo Mine (fiR. 53)PA601Minnesota Mine~8- 54) Minnesota Mine vein extents SW. ofIbis inset map. See plate 1.Mapping of veins by Simons (1974, map).Scale 1"-2000"I I I I I0 FEET 2000 4000 6000 8000Figure52,-Southern segment of Jackalo-Paymaster vein, andother metallized fractures in the Patagoniabatholith, with sample localities PA564-601,Patagonia Mountains - Canelo Hills Unit.109-N-

IIIIIIIIIIIIIIIIi|IIi4OPA571/Gmnodiorite-N-10soGranodiorite~'"G raniteI40 leo+To surfaceGranodioritePA574P,~Stoped 30 ftGranite/Stoped 20 ft1/ItIf/ /! Ji" " PA575L Gran~liori~GraniteFisure53~-Part of Jackalo Mine, with sample localitiesPA 571-577, Patasonia Mountains- Canelo Hills Unit.110//////I /Granodiorite//

IIiII !I 20 0 20 feel-IIAbout 100 ft. moreShear zoneIIIIIFisure54.--Minnesota Mine, northern adit, with samplelocalities PA 599-600, Patasonia Mountains-CaneloHills Unit.111

III1IIIIIIIIIIIIII......' J ~"i iNalional Mine%~' -I,~,.. .... Sha,-n~ /+~ /PA608-612 ~: ....... ~li,,° ~--PA606-607 /Part of Shamrock i" T"'~,..,p j~PA613-,617 (fill- 64i I~ ~ " i ..... ~PA618Mine (fi R. 64) .... ~.: ..... ~:~-~----~" /e-x" / , ..... t,, " ,.;,,,,. .w ,:- S L "'-l-"-,,t"~ %~----~---P^6,3 Golden Rose~..~",. , ~.-' )) ~-e^63z ,,,.=,,,.,.,.t .............. ~ ",s r P^,;~i -":'~

IIIIIIIIIIIIIIIiPA638Breccia zoneGremodiorite-N-I I 120 0 20 fee+PA640/PA639Mostly cavedFisure56,--Bennett Mine, with sample localities PA 638-640,Patagonia Mountains-Canelo Hills Unit.113

~i - i ¸F-PA512IIIIIIIIO'MaraMine(fig. 58)IPA507-508PA509-510PA511X ~"i.J-~-J/ ,d]i)) .,,J:-Geology from Simons (1974, map).All exposures are TerlJary,-ase 8ranilJc rocks."PA513"PA514IIIIIScale 1"-1000'I I I I0 FEEt 1000 2000 3O0OFigure57.--O'Mara Mine and nearby prospects in thePatasonia batholith, with sample localitiesPA507-514, Patagonia Mountains-Canelo HillsUnit.114i4ooo-N-

-m m m m m m m m m m m m m m m m m m- mPASO7Mine totalled 2000 ftof workings, 1915.Dashed workings equalwest drift; solid lineworkinBs in east drift.Inclined shaftQuartzite monzoniteMain~----..._. shaftVein offset by horizontalfault in 80 ft level.Cross cut on 180 ft level was187 ft Ions, in 1915. Driftingon 80 ft level and180 ft level totals 200 ft,in 1915.___I I I40 0 40 f~tMap from Schrader (1915, p. 309).-Intersection of cross cut and drifts/ - - - ~-~ level\ \ Water level in 1915.Incline continues to188 ft level.Sealed bybulkhead.Figure58;-Part of O'Mara Mine workinBs, in cross section, IookinB northeast,with sample localities PA 507-510, Patagonia Mountains-CaneloHills Unit.To 180 ftlevel

IIIIIIIIIIIIIIPASO3JadllaMinePA504Simplified 8eoloRy (alluvium not shown) and unsam~edmine woddngs horn Simons (1974, map).Scale 1"-- 2000'I I I t tOFEET 2000 40120 6000 8000Figure 59.--Metallized fractures in Precambrian and Jurassic rocks, with sample_ _ localities PA490-506, Patagonia Mountains-Canelo Hills Unit.116-N-

- PA346-350(fig. 46)(minin8 camp), ~ _Tr-JNative Silverprospect~ ~ ~ ~_..,.,~ =it.- ~., ~ ....DominoMine _ '~ (~. Tr-JPA354Bi8 Stickprospect-PA355Approx. siteof Ledgeprospect/ ~ PA367 (fi8.61)COx Gulch prospects fP,~3,62-366 (fig.61)PA381GeolosY simplified from Simons (1974, map). Alluvium not shown.Tv - Te~ary-age volcanics,J - Jurassic-age 8ranfffc rocks.Tr-J - Jurassic-age 8ranilic rocks and someTriassic-aBe sedlmenlary rocks.Pc - Precambrian-ase complex (mostly metamorphic).Scale 1"--2000'I 1 I "10 FEET 2000 4000 6000 8000-N-Figure 60.-Mines and prospects near Gray Camp with samplelocalities PA346-367, Patagonia Mountains-CaneloHills Unit.117

I "!-i 20 0 20 f~fIHInBI~8 slibsIHllhly altered volcini¢ rockIII --IIIIIIIIDown 6 ~-~ ~(D~,~=6, 5Quartz MonozonlteFisu re 61.--Part of Cox Gulch (lower) prospects, with sample localities PA362--367,Patagonia Mountains-Canelo Hills Unit.118f

ii;,iiIIIIIIIIIIIIIIIII~ ~ Mi,lie /.--- j"l,-!! ~/~,.'

IIIIIIIIIIIIIIIII(fromdump)GraniteGraniteP^606Diorite-N-1 t I20 0 20 feelSlabs hanging, ready to caveTotal drift possibly200 ft long.Figure 63.--Isabella Mine, with sample localities PA 606-607,Patagonia Mountains-Canelo Hills Unit.120Not accessible due tobad back conditions.

-N-20 0 20 feel e,.~.,, ~.,~i PA611 ~ up 30 flIP/~IOpAr~,~I P.,~GCg .~.Ii, /IIGn~aPA614I~sISF~~~IpALMSFigure 64.--Part of Shamrock Mine, with sample localities PA608-617,Patagonia Mountains-Canelo Hills Unit.121

IIIIIIIIIIIIIIIIIII4O-N-I0PA2o4-~,66m m/ t~- PA2O6PA207RhyoliteI40 feelPA201R h yo liteI"~ PA197~ 1 5 ftPA198PA202%RhyoliteFigure 65.--Panama adit, with sample localities PA 196- 20 8~Patagonia Mountains-Canelo Hills Unit.122

IilIIIIIIIIIIIIIIIIIEXPLANATION OF SYMBOLS FOR REPORT FIGURES AND PLATES, INCLUDING:Inset maps at vadous scales and 1:126,720-scale plates.m I m IIIIIBll IllIIorII/----616or~ or~?APPROXIMATE BOUNDARY OF THE FORESTMANAGEMENT AREAAPPROXIMATE BOUNDARY OF WILDERNESSNATIONAL MONUMENT BOUNDARYTOPOGRAPHIC CONTOUR-Showing eleva'don in feetabove sea levelSTATE UNECOUNTY LINEPRIMARY SECONDARY ROADSUNIMPROVED ROADS TRAILSINTERMITTENT STREAMSGRID TICK MARKPATENTED MINING CLAIMSURFACE OPENINGS-Showin8 sample numbed's);symbols may represent more than one worldn& Also,VARIOUS REPRESENTATIONS OF SAMPLE SITES:Rock sample Iocality.-Showin8 sample numberAdit open (left); /¢lit, inao~essible (dshOTrenchOpencutGlory hole, open pit, or quarry123

IIIEXPLANATION OF SYMBOLS FOR REPORT FIGURES AND PLATES, INCLUDING:Inset maps at various scales and 1:126,720-scale plates-Continued.SURFACE OPENINGS--Showing sample number(s);symbols may represent more than one woddns. Also,VARIOUS REPRESENTATIONS OF SAMPLE SITES-Continued:Prospect (pit, opencut, or small bench)-~" 326-328TunnelMine or quarry (active, left; inactive, dsht)Placer mine or gravel pit (ac'dve, left; inacdve, rishOI ,~il [] []IIShaft~ open to surface (left);Shaft, indinecl (dsht)Shaft, w-'~r filled (lefO;Shaft, caved (dshOShaft, mdaimedMine dump!| Q °"=Drill hole collarALand or mineral monument124

IIIIIIIIIIIIIIIIIIEXPLANATION OF SYMBOLS FOR REPORT FIGURES, INCLUDING:Features of detailed mine maps, both surface and underground,at various scales (larger than 1:24,000).O•129687F@ or ~" PITS//it?,Ior / t l ~.,',ROCK SAMPLE LOCALITY-Showing sample numberOPENCUTDUMPSSTOCKPILEADIT PORTAL (left);ADIT PORTAL WITH TRENCH OR OPEN CUT (right)LEVEL WORKING-Dashed and/or queriedwhere uncertainINCLINED WORKING-Showing degree of inclination,chevrons pointing down; queried where uncertainor InaccessibleTIMBERED (Vertical timbers and/or lagging,)CAVEDRUBBLE WACKFALL) FILLED, MUCK-FILLED, ORBACKFILLED WORKING-Queried where uncertainor inaccessible125

EXPLANATION OF SYMBOLS FOR REPORT FIGURES, INCLUDING:Features of detailed mine maps, both surface and underground,at various scales (larger than 1:24,000)-Continued.STEP DOWN IN SILL-Showing drop in feet;hachures on down side[] []RAISE, head (left); RAISE, foot (risht)[] RAISE GOING UP AND WINZE GOING DOWNWINZE-Noted if water filledMANWAY (left); CHUTE (risht)III[] []~oSHAFT, open at surface (left);SHAFT, bottom (right)PILLARGEOLOGIC SYMBOLSStrike and dip of beddingII ~--"Fault-Showing strike and dip (inclined orvertical, degrees); dashed where approximateIIIII,4,a,-..k ~~r-m" "v0///Fault zone or shear zone-Showin8 strike anddip (inclined or vertical, degrees); dashedwhere approximateThrust fault-Sawteeth on upthrown sideVein-Showing strike and dip (inclined orvertical, degrees); dashed where approximate126

IIIIIIIIIIIIIIIIIEXPLANATION OF SYMBOLS FOR REPORT FIGURES, INCLUDING:Features of detailed mine maps, both surface and underground,at various scales (larger than 1:24,000)-Continued./4fGEOLOGIC SYMBOLS-ContinuedContact-Showing strike and dip (inclined orvertical, degrees); dashed where approximateDike--Showing strike and dip (inclined orvertical, degrees); dashed where approximateShattered zonesB recciated zonesIgneous rock 'zone. or structureMineralized zone, disseminatedMineralized zone, localizedZone containing resources127

ii!1IIIIIIIIIIIIIIIIIEXPLANATION OF SYMBOLS FOR REPORT FIGURES, INCLUDING:Features of detailed mine maps, both surface and underground,at various scales (larger than 1:24,000)-Continued.( \; i/j/ /( / Stoped above,"~ J f 2 7 ft0itMultiple level workinBsStopeSymbols for vertical cross-section mapsC rosscutDrift into facin8 wallDrift into removed wallDrift into facin8 and removed wallWater-filled winze128

-FIG. 4.+"1/Plan view of Three R Mine, 600 level,400 level (dashed line), and parts of 700, 800, 900 levels(From• Handverger, 1963, pl.2, 3, p.47, and Aug. 1919 mine map, unknown source).400 level also known as Colossus adit, site of USBM samples PA 382-421 (fig. 5 ).NEXPLANATIONRaise or winze, unknowno.~'-., I -~x_._ For detail, of 400 level(Colossus adiO, see fig. 5.Ii,,j ) Jf///!I \ /" --J\l///I5OI0I50 feet\I I I- ~1 t ) ~1 ". tcotla~a\ \ ¢.. ~ee0D DH4-23"to -33"610'Wallrocks mapped asJurassic-age (Slmons, 1974, map),\\ I1\ \ , ~,~./'//\\" \\\ -- \\ \ . x\\\ /Main sh \ \ ~ [/%DDH2O'to -14"936'ter~ ar,/(i~e(Handverger, 1963, pl.2),i,~ +\" '~ P ~ I~ ~-,,---=~~\ ~ , ,%600 levelportal~ (Granite 90%, latite 10%,~ andesite, minor)• \x \,~ \\, . \t~i o_. s¢~''.'. '.'.', ,,- +!i\\ \\s. \\;',', "' \ ,~ '" , ~ ,~.+++ t :~\\~. \\ \\ \~ \9,,- \\ \\\.\ \ \\\\ \\\ \r:!#\\., II/Longitudinal sectionbelow Includes these parts oflevels 400, 600, 700, 600, 900\\t\Probably-roped400 level5~ level~ .+...Portal,/~lossus /"'"~edit'x / ElevatJon 3000 ft"--., /""'- )I I.. i II/#PdMain shaft/ %/A !LX////Steped/(projected about 75 ftN. to section)"~'C6OO level600 level lIIIIIiProbably~opedismpedProbablyste~600 levelxCaved In196309~0"~ 195'b700 levelO"toFir,Map is probably pre-1919.Source not known. Stopes uof map odgin date. Probablestopes IdenUfled by examinationof 1963-era map of 600 level(Handverser 1963) and USBM (1990)map of Colossus adlt (400 level).III I I6O 0 60~/ -, X--.- s ~ -/ " ....e00 level900 levelUSBM examined only 400 level during 1990-1991 Coronado study.Longitudinal section through main copper-bearing shear zone on 400, 600, 700, 800levels4Figure 4.-Three R Mine plan and longitudinal section, 600, 400 Levels and part of 700, 800, 900 Levels,Patagonia Mountains-canelo Hills Unit.

• ~.~I~.........FIG. 39Approximate NE. perimeterApproximate SW. limit ofNo. 4 ore body (as per Smith, ~\w'+No. 4 ore body•I1956, pl.3). ~ Air shaf~projected Mexican shaft 34 ft S. Red shaftprojected 30 ft/Connection with otherto secUon N. to section. ~ worldnp uncertain\• Shaft No. 4LimestoneShaft Shaft ~ " ShaftNo. 1ore bodyore, (,, pe, ~ /Schmder, 1915. ~ ~ / , -,.,,,.77-foot level "• "No. 4 ore body- \\I. 11&foot levelI

. . . . . . i ....................-PA143-145FIG. 42EXPLANATIONM aln levelI~ Z --~[I100 ft level200 h level300 ft level40 0 40 leolMap from Kartchner (1944), who derived data from,a 1925 Phelps-Dodge Corp. map (original scalenot recorded).400 ft level450 ft levelApproxim ateM atchline /IIJ ,,..._... ~/-3".".'"r --". ........ 2. ~-J. ~..'....', L:2, ...... u" ...' ..... • .... .S__.~.... -~ I .. . . . , . . . ." ...... " .-~oo/ / \ ~ .~.~1.~ ......................" ....... ~ -\- L-_ _t, 4. ~ " ............IIIIIIf--.......,,.,,..._t~ _ _j / ..11 / -I II ... "~'~-~ I... -.. ,,/ ..._.. -____\......... _. ..- .. .~ ._ .......... ~ . /....... ..~'" .~ /" " .... ,~ ~.. ....~ ...... .......~ •~:" .. i j '-.. ..........: I I II :I : :I I IIiji| l /"./'"/ // /"/////450 / /oooe----oooo oo=o---eooo- o ~ . . / ~ _ _ ~"~ F ........... :_7 ......... L- / ~ 400 _ ... /Figure 42.--World's Fair Mine, with sample localities PA 143-145, Patagonia Mountains-Canelo Hills Unit.

FIG. 48!!PAT~upper levelsf.r%-N-GraniteP/O02i4OI0I40 fael"g,P,'~,'00stopee -~stop~JPA699PA691PAG92,P~ P,k~89#/StopinliPA688//ft bench/,,pP.,~675GranitePA672.,PA673 ~.t /PA668 -~/•~TWmbered/ partly cavedstor~JPA667,/t \\~/~ Middle adit portal elevation 45 ft above lower adit portal (PA658-706).~ Location, trend, approximated from Schmder (1915, p.315). Adit lenlithas of 1915. Adit open in 1991, but was Inhabited by skunks.///Door "----~'~X ~!GraniteFisure48r-Buena Vista Mine, lower and middle adits, with sample localitiesPA 658-706, PataBonla Mountains-canelo Hills Unit.

kjJf~fJj~jJ~~fk jjsJ\JjJ'-NlI\.g-")!ti..!J/- ,,~ ~,',,~ ,~ ,,..~'~.!~7..~ ~° ""J //Qioo °~ ,~!~.\$~se ""?,~,,~o~e°'~ ,,4\•to, ..,1,.. b~ "°~, r,.o,~"9~9~ I

OF THE INTERIORB U R E A U O F MINES•OPEN FILE REPORTMLA 22-94PLATE 1I I I I III I I I I I I II. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110o52'30 .' F I 10 ° 45'00" G ii 0°37'30" H 110o30,00 '' j 110o22'30 '' K 110°15'00"SCALE 1:126,720I 0 I 2 3 4 5 6 miI I I I I I I SIERRA VISTA RANGER DISTRICT32 °, EXPLANATION R. 1 7 E. R. 18 E.• ,~aA;~h --00"i ~ ~m,i~_-"~a . .i ~' ~ r ,.'~," ........... o;, ~,..~ ,:" ][ : :,_, .j .~ ,, ~ :•34131 °52'[3o.. i112i31oi45' b--oo"!331 °37'--30"431 °30',--00"531 °22',-30"6T. 2OS.T. 21 S.T. 22 S.T. 23 S.Mineral patent (boundaries from USDA, Forest Service maps)! mFig. 3 4 i I n s e t map figure numberP A 3 3 5 - 3 4 4 ~ sample numbers Included within Inset map(Figs. 35-37)~fi9ur e numbers in parentheses are detailed mine mapsZ~inset map boundaryNUMBtlCAL-ORDER USTING, IIY IllliMllti NUMBElUl COLILECTED AT IITIRanle of umple nol.PA~i6T. 17S.PA23-34PA35-69liIIIInle~-7:'-~---~.+~=. -----~ ...... 7].," ~ t~amanoi W:r ";- ~'R, " i-~::~:c~---~I~ >. !'~ .. : I ~: :,,, ..,;.!.:~.NUMERICAL-ORDBtl USTiNG, BY IAMPLE NUMIIBlli COU.ECT ill AT lllTES~imonMine=mclneerbyIXoepecmFriaco Fair deimlUnnamed woddnpI~lnll of xmlikl nol.PA318-324PA320-327PA328-331011e nineBlue NoleMineAiluataMineEndlmCl~in MinePA60-64 New York IJeneen} Mine PA332-334 Morning Glory MinePA06-06 Lampeiire Mine PA335-338 Alta MineJillIPA08-89 Sulphide prospect PA339 Salvador MineIIllIPA70-70 La Plato Mine PA340-342 Black 1E=Klle MineIIIIIPA77-80 Halo ##3 Ixolpect PA343-344 Benddr MineirlliPA87 Meadow Valley Mine IIII PA346-350 I Mary Cane aditPA88-80 Homeerake proepect PA351 Unnlmed Ixolpe~iPAgO-92 Unnemed workingl; poleibly pert of ChriltmalGift or Elevation gtollpPA93-90Chriotmal Gift MinePA97-I00PA362-363 1 Nliive Silver IXo=pectPA364-356 i Big Stick. IXo=pectPA366-360Domino Mine group (Lookout Mine)PA361-307PA308-428Unnamed werldnga; poNibly pit of ChriatmmGift or Elevation groupPA101-106 . Elevation Mine groupPA106-1115Hidden proepect=PAl 17-120 Azta¢ Mine group (fig. 16-16)PA127-131 Nine of group ia uncertain; lee Blue Eagle Mine,ExpoladReef MineCox Gulch (iowerl IXollpectITlvuR Mine 0to~= IThree R Mine, WeetMine, Blue Rock No. 8 deim|PA430-464 i European Mine g¢oupPA465-463 Unnernad proagect in breccia pipeI IIII PA464-460 1 Ventura Mine (in pllilPA132 I Expoled Reef Mine Illl PA407-474 1 COX Gl.llCh (|plf| IXllctaPA133-134 Name of workinge le uncort~n; m Blut Eagle PA476-470 Zinc Adil groiJpMine, Expoled Reef MiniPA136-138 - H•mpeonMinePA139-142 l Flux Mine~"~bR. 19E.--i"-_ , .:~:-~~:Y-~sd Lif~r' : , : : 5~: ~ ~'.~ ~.-~:~ i- ~18 "'°C '~ " -: .... :~ ..... 7+ i',-u. ':~'--:L--~4 T. 1 7 S.,r F:m.~---+,.:::!>; .......... >'): t~ ~"~ ' ........~.~ i ~.~' ~i:t--~---~ -D,:~. ~a .:~'2 ~ ..~...... >.~:j .-,__ :___, _. ,.q: .\ .....• ' : ,_~=_,-_....... L'__?~L ~_s_i~_j":Y>'~ ~'5:" jv ,., \i2o'% (:, I ,~ ":. .~' '. "~ i ~> fill ~- r ~J i ~. ~ " " i : ;Z ;: " :.... : :~t" ~-,.-'.~-'..~--~.:~-.-L:."; L' i-. . ,-:.-, ~,~ .~, ::~ ................i . • ..ft./ ."i :-!r~&T " , - . ..... . .._. ..... ,-.. . . . . " , ' , , ", , ~ , ~ • • ~ : - ...--; ....... ' ,PA224-260 Surl'wiideminelll . . . . i / . . . . ~l" .~e:.-'', , .t :':" a *.~ '2 - l / "[e ,"-~'k- ................. i~"i "," [ I .i : -!-, "---. ;1 % ..... I I " : ~ F"G, ~_.g,v- '~;'~',., ',.:.?.:~;- i~la~° t •PA529 Guliootel?) M ne .;:" : i ,J i / " ~ II "i " ..... { , ~ / j , : II 'I' .... i i}l : " • ~l-~' - , i~ :. . ", " -- q°¢~eckeT:,C{LL, LLL2,~_L.----' i . . . . . l I ...... ~= ..... r -- " " : ' ~ i ~ i i ~ " "i:~'i lli~ ' ' " I ~l l: '........ HallIMine :~-:- ................ ~:-~!J-----[---'.- ...... .~_~,__'..2....... :__'+___=_:+_;s~-___: .......... ,~,--~--(--.}.:- ...... p-~+ ...... --~L_L.,- ........... -~ ..... i ...... ;~__ '~ .......... .-..LL_ z';~,~ ............ + ............ ~-/ ........... 4- ............. J, ........... ;~ --:.2-.',...:-~ ,- :./, ...... _.:;~.y; ~:.=L -I~achuca~ ..... ,-:'-. . . ' I., . . . . ~ ] - -:...,~ .~,.,,.o~,~.i : . ~j%x." . ........... ~T_T__.7f_;~.v ......... _.__/ ~F ...... : ..... ~'.-4-t" ...... =-> ~,-4' il-x.---'- ..... "- ...... 2~'-rgG--4~3:----=, ' / " : . ~ . . . . " • ""~" * : • ¢,~- ' '~¢: ~adchl-:~ .~ .. ; s~r:t '-"!: ,:..7-; ":~' ;!" ~ 47~'% ~ ............~i ~--RitffCn"'4456~.~ --.=.~" ,i ~-~M 4~-1: ~ , ~"".......... . . . . . . . . . . . . . . . . . . . . . . . . . . . .: ............ ........~ L_l>::> ." t~om~,: {-',':.. .... - ...... -o~m,- ~,~-:-:I '..L"---::-.-"-=~:I- ...................... r --'--:-:--~ .... -::~- ÷'--:: ...... :-ilRanch _ .i' ". "Li. j , "-" -. " ~W~Dams "WT........... Pt~m.-~ ,-T"- -~ _;~..::: .... I ~tt'~ ; ~g-,,:;~nter- -= -;E=~-'_;~'~-. ~.. ~-..':- :1' - :~ ~'. • ' ~-2 "'3WT~ "~n, .. ~ " D - ~ ~., ~ . ,ii- ~ . - L~0~; ~,~ " '!.C.& " ----4 =:---~- i .... ~ .~ . ":. : ..... "-.-~ ,:::~. ' \~"-:: : : ...... "-:W~ _.. ....... -::::~ ~, ......... ~'. ~ !.-~ ...... 4 ..... T¢--.~ At;'l)tS BbgNA VISTA ...... :~""MPl~a"MPt~R. 15E..-A- ~ - " " iilp~~v-.,i" : " 14-'"-, North .%ddleT. 24 S.31°i45'!00"~ ~.~i ' iSOnf6 Nii~ llilnel~-' Mt ~ashijn~on},.~. -~ .... ~gUS• " T22t : "t .I I ; /; Is" • .f ~ , i '~" i ~ Bent• 4. '~,. 'I b,, = ."a T0(di| i -. i7"" i "r']~ IN i IIJ[I ~ !la i • i "r.l~J 4 ¢,, I'=I! i ,~ : % ~ ~ IR. 16E.331 °.... 37"30"431 °30'00"531 °22'30"6Polyconicprojectioni 1927 North American datum!oo523o" : 110o4500 e. 110037'30 ' . . lmo30,00 .. J 110o22,30,, K 1 0o15.00- L 1 0o07,30 .,, / w • • Lon_.qitu~e west from tareenw/ch................... --- ................................................................................................................................................. ~- ........................................................................................................................................................................................................................... : ................................ :.7- .............. 7: ............... -::: ......... : :,7T-:I II [.III III I I IIIII P II II I I IIIIII I III IIIIIIBase map compiled in the Regional Office, Albuquerque, New Mexico, in 1982from U.S. Forest Service Primary Base Series Maps. Drafted in 1986 byU.S. Forest Service, Geometronics Service Center, Salt Lake City, Utah.SAMPLE LOCALITY MAP OF THE PATAGONIA MOuNTAINs-cANELO HILLS UNIT,,2ORoNADO NATIONAL FOREST, COCHIsE AND SANTA CRUZ COUNTIES, ARIzoNA. _Ill I IIIII II . . . .Field work completed in 1991 by John R. Thompson,assisted by Steven E. Tuftin, Raymond C. Harris,and Darwin K. MarjaniemLBYMARK L. CHATMAN, U.S. BUREAU OF MINES1994