MLA 43-85 - State of Arizona Department of Mines and Mineral ...

!IMineral Land AssessmentOp:n File Report/1985Mineral Resources of the Harquahala| Mountains Study Area (AZ-020-095),| La Paz and Maricopa Counties, Arizonaf-- 3uahalaMountains Study AreaI.II- (~) PhoenixARIZONA..... RECEIVED ~i!'JAN ! 7 !,,,'ADEPT. OF I',IINES &MINERAL RESOUr~CL.I_,United States Department of the Interior| Bureau of Mines1

iiii~imIIMINERAL RESOURCES OF THE HARQUAHALA MOUNTAINSSTUDY AREA (AZ-020-095), LA PAZANDAND MARICOPA COUNTIES, ARIZONAIIibyJohn R. ThompsonMLA 43-851985Intermountain Field Operations Center, Denver, ColoradoIIUNITED STATES DEPARTMENT OF THE INTERIORDonald P. Hodel, SecretaryBUREAU OF MINESRobert C. Horton, Director

IIIIIIIIPREFACEThe Federal Land Policy and Management Act (Public Law 94-579, October21, 1976) requires the U.S. Geological Survey and the U.S. Bureau of Mines toconduct mineral surveys on certain areas to determine the mineral values, ifany, that may be present. Results must be made available to the public and besubmitted to the President and the Congress. This report presents the resultsof a mineral survey of the Harquahala Mountains Wilderness Study Area(AZ-020-095), La Paz and Maricopa Counties, Arizona.IIIIThis open-file report summarizes the results of aBureau of Mines wilderness study and will heincorporated in a joint report with theGeological Survey. The report is preliminary andhas not been edited or reviewed for conformitywith the Bureau of Mines editorial standards.Work on this study was conducted by personnelfrom the Branch of Mineral Land Assessment (MLA),Intermountain Field Operations Center, Building20, Denver Federal Center, Denver, CO 80225.

IiIIIIIII!IIIIIIICONTENTSPageSummary ..................................................................1Introduction .............................................................2Geographic setting .......................................................3Previous studies .........................................................5Present investigation .................................................... 5Acknowledgments .......................................................... 6Geologic setting ......................................................... 6Mining history ........................................................... 7Appraisal of sites examined .............................................. 9Sunshine Nine area .................................................. 10Linda Nine area ..................................................... 11Dushey Canyon area .................................................. 12Browns Canyon area .................................................. 13Crown Prince area ................................................... 14Arrastre Gulch area ................................................. 15Blue Tank Canyon area ............................................... 16Harquahala Mountain ................................................. 18Northwest area ...................................................... 20North Sunset Canyon ................................................. 23Other occurrences ........................................................ 25Oil and gas ......................................................... 26Geothermal .......................................................... 27Sand and gravel ..................................................... 27Commodity highlights ..................................................... 27ii

i!IIIIIIIIIIIIIIiILLUSTRATIONS--ContinuedFigure 13. Map of an adit in the Blue Tank Canyon mineralized areashowing smsple localities 195-200 ........................... 61Figure 14. Map of a bulldozer trench in the Blue Tank Canyonmineralized area showing sample localities 201-203 .......... 62FigureFigureFigure15A. Map of the bulldozer trench on top of Harquahala Mountainshowing sample localities 218-234 ........................... 6415B. Photograph of the bulldozer trench on top of HarquahalaMountain (looking north) .................................... 2115C. Photograph of the bulldozer trench on top of HarquahalaMountain (looking south) .................................... 22Figure 16. Map of two adits in the Northwest mineralized area showingsample localities 267-272 ................................... 71Figure 17. Map o£ an adit in the North Sunset Canyon mineralized areashowing sample localities 278-296 ........................... 73Figure 18. Map of part of the North Sunset Canyon mineralized areashowing sample localities 297-311 ........................... 76Fisure 19. Map of an adit in the North Sunset Canyon mineralized areashowing sample localities 312-333 ........................... 79Figure 20. Map of an adlt near the North Sunset Canyon area showingsample localities 338-343 ................................... 82Plate 1. Mine and prospect map of the Harquahala Mountains Study atArea, Maricopa and La Paz Counties, Arizona ................. backEXPLANATION OF SYMBOLS FOR FIGURES 3-20 .................................. 85Table 1.Table 2.Table 3.TABLESPageSummary of information regarding mineralized areas in andnear the Harquahala Mountains Study Area .................... 34Data for samples from the Sunshine Mine mineralized areanot shown on Figures 3 and 4 ................................ 39Data for samples from the Linda Mine mineralized area shownon Figure 5A ................................................ 42iv

IIIIIII,,|IIIIIIIiiITableTableTableTableTableTableTableTableTableTableTableTableTableTableTableo5.....10.11.12.13.14.15.16.17.TABLES--ContinuedData for samples from the Linda Mine shown on Figure 5B .....Data for samples from the adit in the Dushey Canyonmineralized area shown on Figure 6 .......................... 47Data for samples in the Dushey Canyon mineralized area notshown on Figure 6 ........................................... 48Data for samples from the Browns Canyon mineralized areashown on Plate 1 ............................................ 49Data for samples from the Crown Prince Mine mineralizedarea shown on Figure 7 ...................................... 52Data for samples from a shaft in the Arrastre Gulchmineralized area shown on Figure 8 .......................... 55Data for samples from the Arrastre Gulch mineralized areanot shown on Figure 8 ...................................... 56Data for samples from the Blue Tank mineralized area notshown on figures ............................................ 63Data for samples from the bulldozer trench on top ofHarquahala Mountain shown on Fisure 15A ..................... 65Data for samples from the Harquahala Mountain mineralizedarea shown on Plate 1 ....................................... 67Pa~eData for samples from two adits in the Northwest mineralizedarea shown on Figure 16 ..................................... 72Data for samples from an adit in the North Sunset Canyonmineralized area shown on Figure 17 ......................... 74Data for samples from the North Sunset Canyon mineralizedarea shown on Figure 18 ..................................... 77Data for samples from an adit in the North Sunset Canyonmineralized area shown on Figure 19 ......................... 8018. Data for samples not shown on other tables or fiKures ....... 83V45

iUNITS OF MEASURE ABBREVIATIONS USED IN THIS REPORTftfoot/feetin.inch(es)mimile(s)oz/tonounces per toni!i ii i! 7~ ¸~i~, ' J,• 19• k illiI, ii ~vi

IIIIIIIIiIIIIiIIiIMINERAL RESOURCES OF THE HARQUAHALA MOUNTAINSSTUDY AREA (AZ-020-095), LA PAZ ANDAND MARICOPA COUNTIES, ARIZONAbyJohn R. Thompson, Bureau of MinesSUMMARYThe Harquahala Mountains BLM Wilderness Study Area is in the Basin andRange physiosraphic province of west-central Arizona. The present studycovers 24,735 acres of the 72,675 acre wildernessstudy area preliminarilyrecommended as suitable for inclusion in the National Wilderness PreservationSystem in La Paz and Maricopa Counties, Arizona. During the winter of1983-84, under authority of the Federal Land Policy and Management Act (PublicLaw 94-579), the Bureau mapped and sampled mines and prospects in and near theWSA to determine the mineral resources present.Mineralization in the study area is controlled by three largenorthwest-striking faults. Hydrother~aal fluids related to Tertiary dioritedikes and a granite pluton were most likely the source for the minerallzationin the veins.In the studied part of the Harquahala Mountains, 10 mineralizedareas were identified--5 are wholly or partly inside the study area, 2 areadjacent to the boundary, and the other 3 are within 1 mi of the study areaboundary.The Crown Prince mlneralized area in the remote east-central part of thestudy area contains two adits and a shaft.At least two quartz veins areexposed and gold content of samples is as much as 1.32 oz/ton.However, theabundant faulting, discontinuous quartz veins and gold values, and limitedexposures of mineralized rocks, preclude the calculation of a resource.quartz vein in the shaft requires further surface or underground explorationto determine its extent and amount of mineralization.1The

!!IIIIII!IIIiIIIIThe Northwest minecalized area, about 1/4 mi inside the northwestboundary, contains an indicated resource of 900 tons and an inferred resourceof 2,400 tons of material with an average grade of 0.03 oz gold per ton and0.87 percent copper. A barite vein (as much as 49 percent barium) is 1/2 minorth of the gold-coppec resource.The North Sunset Canyon minecalized area, in the north-central part ofthe study area, contains an indicated resource of 2,500 tons of material withan average grade of 0.28 oz per ton gold and 1.03 percent copper. This areawarrants further explocation because of the high gold and copper values, easyaccess, and the possibility of a continuation of the resource at depth.Minecalized structures at five of the areas outside the study area(Sunshine Mine, Linda Mine, Browns Canyon, Accastce Gulch, and Hacquahala Mtnareas) could extend into the study area. Structures at Dushey Canyon and BlueTank Canyon minecalized areas do not trend toward the study area.The Hawke Goldmining Company Ltd., is conducting operations at theSunshine Mine and Linda Mine minecalized areas, and cesults of their workshould be checked to see if mining in the Hacquahala Mountains is presentlyeconomic.INTRODUCTIOWFrom November of 1983 through March of 1984, the Bureau of Mines, as partof a joint effort with the U.S. Geological Survey (USGS), completed field workon a mineral investigation of part of the Harquahala Mountains WildernessStudy Area (NSA). The Bureau mapped and sampled mines, prospects, and alteredand mineralized zones in and near the study area to appraise mineral reservesand subeconomic resources. The USGS compiled a geologic map and did aregional geochemical survey of the area in order to assess the potential for2

IIIIIIIIIIIIIIIIIIundiscovered resources. Each agency will independently publish results of itsstudies and a joint report will address the total mineral values of the area.This report discusses the results of the Bureau of Mines study.GEOGRAPHIC SETTINGThe Harquahala Mountains Wilderness Study Area contains 72,675 acres ofFederal land in the Lower Gila Resource Area, managed by the Bureau of LandManagement (BLM). The NSA is in La Paz (formerly northern Yuma) and MaricopaCounties, in west-central Arizona (fig. I). The current study area (SA)covers 24,735 acres preliminarily recommended as suitable by the BLM forinclusion into the National Wilderness Preservation System.The SA is in the northeast-trending Harquahala Mountains and extends fromDushey Canyon on the east to about 3 mi west of Harquahala Mountain. Thestudy area is about 12 mi long and from 3 to 6 mi wide. Elevations range from5,480 ft on the north ridge of Harquahala Mountain to about 2,200 ft in thesoutheastern corner.The largest cities in the area are Nickenburg, Arizona, about 45 mi eastof the SA, and Phoenix, Arizona, about 75 mi southeast. The nearest towns areAguila and Salome. Aguila is at the junction of the Eagle Eye Road and U.S.Highway 60. The Eagle Eye Road connects with the Buckeye-Salome Road south ofthe Harquahala Mountains. This graded two-lane gravel road follows thesouthwest end of the Harquahala Mountains and continues north to the town ofSalome at U. S. Highway 60.The SA is accessible by gravel roads that lead to most of the majordrainages. Access on the north and west sides is by gravel roads off of U.S.Highway 60. Access to the east and south is from the Eagle Eye Road, wheregravel roads turn into jeep trails that go close to, and in some places into3

34o00 , R. 13 W. 113°30'. R.II W. R. IO W. 113°15 ' R. 9W.I ' ~ ~- '134o00 '~ Aguila|| i! oi -'~J (- ~ ,oo ~~ . 1 -_~i~.. ,~.:.:.:. !!!!ii~!iiii~i~i~!!iiii:: ~ o~::::::: :::::::::::::::::::::::::::::::::::::::::::: ~.:.:: :i:i:i:

IIIIIIIiiIIIIIIIIIthe SA. A good gravel road leads to the top of Harquahala Mountain from thesouth.PREVIOUS STUDIESLittle has been written previously on the mineralization in the centraland northern parts of the Harquahala Mountains. Barite deposits were studiedby Stewart and Ptistor (1960); fluorite deposits south of the SA were studiedby Denton and Kumke (1949). This mlneralization is discussed elsewhere under"Other Occurrences".The geology and production of the E11sworth 8old mining district, in thesouthwest part of the Harquahala Mountains, was reported by Wilson and others(1934). The Aguila manganese mining district, south of the range, was studiedby Farnham and Stewart (1958). Both areas are discussed elsewhere under"Mining History".The tectonics of this region of Arizona was studied by Coney (1980),Davis (1980), Davis and others (1980), and Rehrig and Reynolds (1980).PRESENT I~VESTIGATIONPrior to field investigations, a search for data relevant to mining andmlneralization in the area was made of published and unpublished literature,Bureau of Mines files, and files of the Arizona Bureau of Geology and MineralTechnology. BLM records were searched for patented and unpatented miningclaims, and oil and gas and geothermal lease information.The field study, which took 126 employee-days, covered the area betweenU.S. Highway 60 on the north, Dushey Canyon and Browns Canyon on the east, and1 1/2 mi beyond the SA boundary on the south and west. All mines, prospects,and mineralized areas in and within 1 1/2 mi of the SA boundary were mappedand sampled. Samples were taken from mineralized structures and zones at the

workings, outcrops, and mine dumps.Where workings were inaccessible, dumpI1IiiIIIIIIIiIIImaterial was selected by rock type and, if available, ore specimens werecollected.A total of 343 samples was taken. All were fire assayed for gold andsilver and analyzed semiguantitatively for 40 elements (appendix) usingemission spectrosraphic methods. For selected samples containing identifiedminerals, atomic absorption methods were used to determine copper, lead, zinc,iron, manganese, and barium~ special analysis determined the fluorinecontent. Complete analytical results are available for public inspection atthe Bureau of Mines, Intermountain Field Operations Center, Building 20,Denver Federal Center, Denver, CO 80225.ACKNOWLEDGMENTSSpecial thanks are extended to Frank Stevenson of Hawks Goldmining Ltd.,and Frank Russell, who gave helpful information on their mining clalms.GEOLOGIC SETTINGUnderstanding of regional and local geology gives a better idea whereimportant mineral deposits may lie. The Harquahala Mountains are an18-mi-long, northeast-trending range of mountains in the Basin and Rangephysiographic province (fig. 2). To the northwest across the McMullen Valley,the Harcuvar Mountains are roughly parallel to the Harquahala Mountains. Tothe south and west, the regional trend of mountains is northwesterly, almostperpendicular to the Harquahala and Harcuvar Mountains.Precambrian granite, gneiss, and schist are the most common rocks in theHarquahala Mountains; Tertiary granite occurs in the eastern part of therange. Mesozoic metasediments and Paleozoic marble crop out just south andwest of the boundary, where low angle faulting juxtaposed Paleozoic marble andPrecambrian schist.6

IIIIIIIiIIIIIIIIIn the SA, three major northwest-trending faults cut thenortheast-trending Harquahala Mountains. The faults parallel mountain rangesto the southwest (fig. 2). These faults are an important control for theemplacement of dike systems and quartz vein systems. Most of the mineralizedareas in the range are associated with these faults or with associatedeast-striking faults between them.The Dushey Canyon fault, near the northeast boundary of the SA, strikesnorthwest through Dushey Canyon and Browns Canyon Wash and dips steeply to thenortheast. The Sunset Canyon fault, near the middle of the SA, controls theorientation of Sunset Canyon in the middle of the range. This fault parallelsthe Dushey Canyon fault and has a similar dip. The third is a smallerparallel fault near Harquahala Mountain, on the west side of the SA (Spencer,1984), and will be referred to here as the Harquahala Mountain fault.Diorite dikes occur throughout the Harquahala Mountains. Nine of the i0identified mineralized areas contained quartz veins in and adjacent to dioritedikes. The dikes extend from small predominantly calc-alkaline plutons andwere emplaced along fractures and faults. As the diorite intrusives cooledand contracted, mineralized quartz veins formed from hydrothermal solutionsalong the contacts between the diorite and the intruded rock. Differentphysical and chemical features of the host rocks may explain whymineralization is not associated with diorite dikes.MINING HISTORYMines in and near the SA are widely scattered and not grouped into anyorganized mining districts. Two nearby districts, the Ellsworth and theAguila, are south of the study area.

IIln 34o00,113°45 'I .=.~¢.¢c;_ ~ ~, q A I. L. F'Y .,0 0@'( i~@ s113°00 '-- 34000 'IIIIInIIlIIlIIMAPI113°45 ~t- ' - ' ~ o o ql, o~Odq r ~/• Dushey Canyon faulto o ooO°°eal • e o, __,~,A.L~~ ~• ~ t~.*r_.~r=~. ~,~Harquahala Mountainsu! ~.~ r,~'~.%'~.~be~t~ ~ " Study Area- ~ - ' ~ / "" ~" ~ ~ ~ "~ lHAROUAHALA Harquahala Mountain fault ~1~ MTNSc::2PLOCATIONEXPLANATIONVAL~%%0 5 I0 15 MILES "/"~I'-'-I f--d I---I I ] ~1~Geology adapted from J.E. Spencer, 1984APPROXIMATE BOUNDARY OF THE HARQUAHALA MOUNTAINS STUDY .AREALOW-ANGLE NORMAL FAULT--Hachureson downthrown side; dotted where concealedHIGH-ANGLE NORMAL FAULT--Bar and ball on downthrown sideTHRUST OR REVERSE FAULT--Sawteeth on upper plate; dotted where concealedHIGH-ANGLEGEOLOGIC CONTACTFAULT--Dashed where approximatePRECAMBRIAN GNEISS, GRANITE~ and SCHISTTERTIARY GRANITEMESOZOIC METASEDIMENTSPALEOZOIC MARBLETERTIARY-CRETACEOUS(?)MYLONITIC GNEISS-N-I 13o00 'Figuce 2.--Map showing cesional geologic featuces in the Hacquahala Mountains,Acizona.8

IIIIIIII!IIiIIIIIIThe Ellswocth district (also called the Hacquahala district), about 4 misouthwest of the SA, is a lode gold area that was discovered in 1888. TheBonanza, Golden Eagle, Sococco, San Marcos, Hercules, and Hidden TreasureMines yielded over $2.5 million in gold between 1891-1929 from the district.Copper, silver, and some lead were also recovered. Mineralization occurs insteeply dipping faults cutting granite, hornfelsed shale, limestone,quartzite, and conglomecate. (See Wilson and others, 1934.) The geology inthe southwest part of the Harquahala Mountains is different from that in thestudy area.In the Aguila district, about 3 mi south of the SA, manganese was minedfrom Tertiary volcanics. About 20 mines are within a 15-mi-1on8 and ~-mi-widenortheast-trending volcanic belt. The district became active in 1917 anddeclined after Wocld War I. During this period, 3,496 tons of ore averaging35.8 percent manganese was shipped. Mines in the district operatedintemittently for short periods of time until Wocld War II, when sevecal wereoperated for about one year. Operations were terminated in 1944 and thedistrict remained do~ant until the Korean conflict in 1951, when thegovernment purchase program for domestic manganese was announced. About30,000 tons of low-grade manganese ore was mined between 1951 and 1954. (SeeFarnham and Stewart, 1958.) The geology of this district is dissimilar to thestudy area; it was not studied.APPRAISAL OF SITES EXAMINEDIn this report, mineralized areas in and near the SA are named for theirlocatlon or lacgest nearby mine. Clockwise, starting in the northeast, themineralized areas discussed are: Sunshine Mine, Linda Mine, Dushey Canyon,Browns Canyon, Crown Prince, Arrastre Gulch, Blue Tank Canyon, Hacquahala9

IIIIIIIIIIIIIIIII|IMountain, Northwest, and North Sunset Canyon (pl. 1). A summary of geology,production, commodities, and resources of these areas is shown on Table 1.Sunshine Mine areaThe Sunshine Mine area is less than 1/2 mi outside the northern boundaryof the SA in the southwest fork of Dushey Canyon (p1. I). A gravel road fromU.S. Highway 60 leads to the Sunshine Mine and several nearby prospects.Gneiss, granite gneiss, and granite of Precambrian age are cut bygold-bearing quartz veins adjacent to diorite dikes. The veins strike east,and dip from 35 ° S. to vertical. These veins occupy fractures that strikeroughly 60 ° to the Dushey Canyon fault, which is about 1 mi east of themineralized area. The fractures could have resulted from strike-slip movementalong the Dushey Canyon fault.Six shafts, two adits, and five prospect pits make up the workings in theSunshine Mine area. The Sunshine Mine (fig. 3) consists of an inclined shaftwith two working levels on a quartz vein striking N. 70 ° E. and dipping 35 ° S.that ranges in thickness from 1 to 8 in. and contains abundant hematite. Sixof the eight samples taken from the vein contained gold. Values were as muchas 0.21 oz/ton, and averaged 0.1 oz/ton.Samples taken on what appears to be the same or a related vein west ofthe Sunshine Mine, also contained gold. A sample of quartz from a stockpilecontained 2.17 oz gold per ton (no. 11, table 2). The veln(s) trend(s)westward toward the SA, but no prospects or outcrops of quartz were found westof the sampled sites. An adit (fig. 4) driven about 100 ft into granitegneiss never reached the veins either because they dip south and the adit wastoo short, or the veins pinch out.10

IIIIIIIIIIIIIIIIIMinerallzation within the vein appears to decrease with depth in theSunshine Mine, but development is inadequate to determine rake on the oreshoot or if mineralization continues along strike or dip.One select sample of magnetite (no. 26, table 2) taken from the dump of ashaft about 50 ft deep, contained 41.0 percent iron.Hawke Goldmining Company Ltd., the current claim holder, is conductingexploration in the Sunshine Mine mineralized area and is developing sites toheap leach ore to recover gold.Linda Mine areaThe Linda Mine area is on the northern SA boundary, about 1 mi south ofthe Sunshine Mine mineralized area (pl. 1, fig. 5A). A gravel road, a forkoff the road that leads to the Sunshine Mine, continues up to the Linda Mineand nearby prospects. The area is along an irregular brecciated contactbetween Precambrian granite and schist on the north, and a Tertiary graniteintrusive on the south.Workings in the area consist of the Linda Mine, three short adits, twoshafts, and five prospect pits. The Linda Mine (fig. 5B) was driven 600 ftinto Tertiary granite to intersect the gold-bearing pyritiferous granite foundabove it. Several thin dikes were intersected in the adit, but no mlneralizedrocks, veins, or structures were encountered (table 3).A 1-ft- to 5-ft-wide breccia zone, trending N. 40 ° E., and consisting ofgranite fragments in a calcite matrix, is exposed at sample sites 36, 37, 50,52-56, (fig. 5A). All breccia samples contained gold - from a trace, to asmuch as 0.24 oz/ton (table 4).Pyritiferous granite occurs ~ust west of the breccia zone, but was notfound in outcrop; a sample from an ore stockpile contained 0.83 oz gold per ton11

I(no. 33, table 3). About 10 tons of material is estimated to be in thestockpile.South of the Linda Mine workings, inside the SA boundary, fracturedIIIIIIgranite and a diorite dike are exposed in a short declined adit (sample sites29-31). A sample (no. 30, table 3) of the hematite-bearing granite assayed0.12 oz gold per ton. The vertical diorite dike, trending ~. 25 ° W.,contained 0.29 oz gold per ton (no. 31), unlike most dikes in the SA which aregenerally barren.The pyritization of the granite is related to the contact between thedifferent age granites. The strike of the contact is irregular; however, theapparent trend is toward the SA. Fractured granite could occur at other sitesin the study area and could possibly be mineralized. The breccia zone can betraced on the surface for about 300 ft southwesterly inside the SA.The Hawke Goldmining Company Ltd. (working in the Sunshine Minemineralized area to the north) is planning to explore the mineralizedstructures in the Linda Mine mineralized area and to leach the dumps if gradeswarrant it.If the Hawke Goldmining Company does develop this area, the rocksin the breccia zone are incompetent,and ground support would be needed tokeep any underground workings open.Dushey Canyon areaThe Dushey Canyon area is located about 1/2 mile northeast of the SA (pl.I).A gravel road that forks off the road that leads to the Sunshine andLinda Mines continues along the east fork of Dushey Canyon and leads to theworkings in this area. A 100 ft adit (fig. 6), a vertical shaft, and aninclined shaft are on an east-trending, gold-bearing quartz vein dipping 40 °S. This vein fills an apparent tension fracture, related to possible12

iii .... i ![I[I[[[[III[I[[[strike-slip movement on the Dushey Canyon fault. The vein has roughly thesame strike and dip, and is in line with the vein in the Sunshine Minemineralized area, 2 mi west. They may be the same vein. Samples of themassive hematite-stained quartz vein in the adit contained as much as 0.07 ozgold per ton (table 5). Because of dangerous unsupported rock slabs along theback, no samples were taken from the inclined shaft.Northeast of the adit, a sample of vein quartz in a stockpile contained0.43 oz gold per ton (no. 81, table 6). Quartz veins do not crop out in thisarea and the source of this sample was not determined. It is possible thatthe vein quartz comes from a structure related to the Dushey Canyon fault.Further exploration, in the form of drilling and trenching, would beneeded to determine the continuity and grade of veins in this area. Ifaddltional mineralization exists on the west-striking vein between this areaand the Sunshine Mine, it would be north of the SA.Browns Canyon areaThe Browns Canyon area is adjacent to but outside the eastern boundary ofthe SA (pl. 1). A gravel road, from the Eagle Eye Road out of Aguila, leadsup Brown Canyon Wash to workings in the area. Northwest-striking quartzveins, adjacent to diorite dikes and faulted and altered zones related to theDushey Canyon fault, are exposed here in bulldozer trenches. These trenchesare about 6 ft deep and as much as 20 ft wide and 180 ft long. The DusheyCanyon fault forms the contact between Tertiary granite to the west andPrecambrian granite and schist to the east. Brecciated rocks in the areaserved as a permeable channel for the introduction of mineralizing fluids.Copper staining, quartz veins, fluorite, barite, breccia zones, and alteredareas are possible surface indications of additional mineralized rocks atdepth.13

IIIIIIIIIIIIIIIIIIIAnalyses of samples from the Browns Canyon mineralized area (table 7)show several samples containing trace amounts of gold and arsenic, and onesample of granite (no. 105) containing 0.01 oz gold per ton. Several samplescontained silver, and one fluorite sample (no. 111) contained 1.8 oz silverper ton, and 23.6 percent CaF 2. Two samples (no. 84 and 110) contained overI0 percent barium.Arsenic and barium are highly mobile elements and are used as pathfindersfor lead-zinc-silver deposits (Levinson, 1980), and lead, zinc, and silvervalues are above background for this area. This suggests that a base andprecious metal deposit could exist at depth. Further exploration, in the formof drilling and trenching, would be needed to determine the continuity andgrade of breccia zones in this area. If mineralization is found at depth inthe Browns Canyon mineralized area, the indications are that it would benortheast of the Dushey Canyon fault, and not inside the SA.Crown Prince areaThe Crown Prince Mine mineralized area (pl. 1) in the east-central partof the SA, is reached by a jeep trail off the road up Browns Canyon Wash. Twoadits, a shaft, and two prospect pits constitute the workings. The CrownPrince adit (fig. 7) comprises over 300 ft of workings. At the portal, anear-horlzontal 0.5-ft-thick quartz vein, trending about N. 80 ° E., cropsout. A sample (no. 116, table 8) from the vein contained 0.51 oz gold perton. Over 300 ft of cross-cutting did not expose any veins or mineralization,and samples from the adit contained only trace amounts of gold and low amountsof base metals (table 8). Seven northwest-trending faults cut granite andgabbro in the adit. Gabbro is not common in the Harquahala Mountains,occurring only here and in the Blue Tank Canyon area, south of the study area.14

ilia|IIIIIIIIIIIIIIIIThe quartz vein at the portal is not continuous and either pinches out or isfaulted off.About 30 ft west of the portal, a small pit was dug on the same or arelated vein. A quartz sample (no. 114) from the vein contained 0.03 oz goldper ton.About 160 ft southeast of the Crown Prince adit, an 80 ft adit (fig. 8)crosscuts to an 18 ft vertical shaft on a 0.5-ft-thick quartz vein striking N.80 ° W. A sample (no. 132) of the vein contained 1.32 oz gold per ton and 0.2oz silver per ton. There is no dike associated with the fractured quartz veinhere as in other mineralized areas studied in the Harquahala Mountains.About 1/2 mi east of these workings, a prospect pit was dug on a shearzone striking N. 50 ° W., and dipping 25 ° N. This 4-ft-wide shear zonecontained vuggy quartz with abundant hematite and pyrite. A select sample(no. 113, table 17) of the quartz contained 0.15 oz gold per ton.The quartz vein at the portal of the 300 ft adit contains gold values,but the vein could not be traced any distance as it either pinches out or isoffset by a fault. The quartz vein at the shaft contains gold, and continuesat depth. The lack of development on the veins makes it impossible tocalculate resources. Both of the quartz veins may contain gold resources atdepth and along strike. Such resources would be entirely inside the SA. TheCrown Prince area should be further explored, especially at the quartz vein inthe shaft.Arrastre Gulch areaThe Arcastre Gulch area is situated about 1 mi southeast of the SA (pl.I). The only patented claims in the studied part of the Harquahala Mountainsare located here. A gcavel road, from the Eagle Eye Road out of Aguila, leadsup Arrastre Gulch to workings here, and to nearby marble quarries.15

All of the workings are located on northwest-striking, gold- andIIIIIIIIIIIIIIIIcopper-bearing quartz veins that parallel the Sunset Canyon fault.are along contacts between diorite dikes and Mesozoicgneiss.The veinsgranite and graniteMarble, inferred to be of early to mid-Paleozoic age, lies directlyon Precambrian basement rocks (Davis, 1980, p.59) and crops out northeast andLsouthwest of Arrastre Gulch. Although diorite dikes intruded the marble,quartz veins were not found in or near the dikes, and the marble is not knownto be mineralized.The most recent working is a shaft (fig. 8) that had one level on thevein and was flooded below the drift. Additional levels could be presentbelow the water level.bin is next to the collar.in places,The collar of the shaft had been cemented, and an oreA ladder was present, but it was loose and brokenso ropes were used to safely gain access to the working level.Every sample from the quartz vein and wall rock contained at least a trace ofgold, and one sample (no. 160, table 9) contained 2.07 oz gold per ton.metals were also present--as much as 1.4 percent copper, 0.11 percent lead,and 0.07 percent zinc.BaseSamples from dumps of the inaccessible nearby shaftscontained as much as 0.24 oz gold per ton, and 0.25 percent copper (table 10).The SA boundary is 1 mi north of the Arrastre Gulch area, andmineralization could continue along strike into the area. Geophysical andgeochemical surveys and drilling would be required to determine if thesemlneralized veins extend into the SA.Blue Tank Canyon areaThe Blue Tank Canyon area is about 1 mi south of the SA.from the Eagle Eye Road out of Aguila,A gravel road,leads to workings in this canyon.Several quartz veins in and adjacent to diorite dikes were exposed in adits,16

iIIIII!IiIIiIIiIIIshafts, and bulldozer trenches. Copper and silver were found in almost everysample of vein quartz.Near the mouth of Blue Tank Canyon, southeast of the mineralized area, anadit (fig. 9) was driven on a northeast-trending skarn zone near the contactbetween granite and marble. Traces of gold and up to 0.2 oz silver per tonwere found in samples from the adit.A shaft and adit in Precambrian gneiss, on the east slope of the canyon(fig. 10), were driven on an east-striking vein along a fault and in a dioritedike. Gold, silver, and anomalously high copper values were detected in mostof the analyzed samples. Samples taken along the 350-ft-long, 1- to 2-ft-widequartz vein contained as much as 0.73 oz gold per ton, 0.7 oz silver per ton,and 6.0 percent copper. The vein was extensively stoped, often to thesurface. The shaft at the portal was not accessible; therefore, the down-dipdevelopment on and continuity of the vein is unknown.In the mineralized area, on the west slope of the canyon, a 12 ft by 12ft declined adit (fig. 11) was driven to intersect veins exposed on thesurface in trenches I00 ft above. The adit declines I0 ° and is about 200 ftlong. The bottom half of the declined adit is flooded, but hematite stainingcould be seen at the face, suggesting that a vein was intersected.Bulldozers were used in the past to expose veins on the west slope ofBlue Tank Canyon. A quartz vein along the contact between a diorite dike anda vein along a contact between gabbro and granite gneiss were exposed by thistrenching (fig. 12). This working is 100 ft above the adlt shown in FigureI0. As much as 0.07 oz gold per ton, 0.4 oz silver per ton, and 5.0 percentcopper were present in vein quartz samples from the bulldozed trenches. Thewalls of the trenches have sloughed in at most places preventing a samplingdensity adequate to calculate resources.17

Just north of the bulldozed trenches (pl. 1), an adit (fig. 13) wasdriven on a steeply-dipping, west-trending quartz vein. The vein is azuritestained, and contained as much as 0.06 oz gold per ton, 0.3 oz silver per tonand 0.93 percent copper.Further north, a quartz vein in a diorite dike was exposed by a bulldozertrench (fig. 14).The bench wall was 30 ft high and some pits were dug on thevein.vein.The diorite was highly altered and chrysocolla was common in the quartzA 100-ft-deep shaft was nearby and the dump material consisted only ofgranite. As much as 0.02 oz gold per ton, 0.2 oz silver per ton, and 3.3percent copper was present in samples taken along the diorite dike and quartzvein.East-trending quartz veins in the Blue Tank Canyon area occupy fissuresin granite, gabbro, and gneiss.about 45 ° to the northwest-trendThe east-striking veins are at an angle ofof the Harquahala Mountain fault, and mayfill tension fractures related to the Harquahala Mountain fault. Thenorthwest-strikingveins exposed at the trenches are parallel to and may bedirectly related to the Harquahala Mountain fault.The trend of the major mineralization here is not toward the SA.Some ofthe veins are trending northwest and could extend into the SA.The HarquahalaMountain fault trends through the SA, and could control faults andmineralization that is as yet undiscovered. Further work, in the form ofexploration drilling and trenching, would be needed to determine thecontinuity and grade of veins in this area.Harquahala MountainThe highest point in the Harquahala Mountains is 5,681 ft HarquahalaMountain.A gravel road, from the Eagle Eye Road out of Aguila, leads up Blue18

4.0 percent copper. On the south side of Harquahala Mountain quartz veinscontaining sulfides also contain gold.The small amounts of mineralization on top of Harquahala Mountain may beattributed to being near the top of a mineralized system.Since all of theminerallzed areas are hydrothermal in origin, occur at or near diorites dikes,contain an unusually high gold to silver ratio and above normal amounts ofcopper, they may be related to a similar source.Zoning can be suggested fromthe available data, and a mlneralized system is probably present in the area.Over 3,000 ft of elevation is gained from the Blue Tank Canyon area, which ison the same or a similar fault, and has a higher grade of mineralization.The area northwest of Harquahala Mountain inside the SA is also higher inelevation than Blue Tank Canyon and contains low gold values, suggesting thatit is in an upper zone of mineral deposition.Higher gold and copper valuescould occur at depth.The high gold and copper values southwest of HarquahalaMountain and outside the study area are from sites topographically lower and,therefore, lower in the mineralized system.Further exploration, in the formof drilling and trenching would be needed to determine the continuity andgrade of veins in this area. Quartz veins near the peak of HarquahalaMountain, and northwest inside the SA, contain too low of a grade to meritfurther exploration.Northwest areaThe Northwest area is along the northwest boundary of the WSA (p1. 1).Agravel road from U.S. Highway 60 leads to workings in this area.Workingsinside and outside the SA are included in this discussion.Two short adits(fig. 16) inside the SA were driven on a siliclfied, azurite-stained,east-striking fracture zone in Precambrian granite.The silicified zone is20

Figure 15B.--Photograph of the bulldozer trench on top of HarquahalaMountain (looking north).21

IIIIIIIIIIIII!|ii~i •i!:,rI,Figure.15C.--Photosraph of the bulldozer trench on top of HarquahalaMountain (looking south).22

illalso fractured, a sign of subsequent movement along the structure.Sample no.IIIIIIIIIIIIIIII271 (table 13), of the vein in the upper adit, contained 12.4 percent copper;and sample no. 269, of the vein in the lower adit, contained 0.13 oz gold perton.For the Northwest mlneralized area, assuming a strike length for bothadits of 60 ft, width of 1.5 ft, and mineral continuity 30 ft above and belowthe adit, an indicated resource of 900 tons, and an inferred resource on thestrike of the vein between adits of 2,400 tons of material with an averagegrade of 0.03 oz gold per ton, and 0.87 percent copper, is estimated.Inside the SA, but outside the mineralized area, are prospects dug on twoquartz veins, striking N. 75 ° E., and dipping 50 ° N. Samples from the 3-ftand4-ft-wide veins northeast of the adits had trace amounts of gold (samples276 and 277, table 17).Two prospect pits outside the SA were dug on a vertical barite veintrending N. 40 ° W. The 1-ft-thick vein is fractured, brecciated, and hematitestained. Samples contained up to 49 percent barium (nos. 273-274). The veincould not be traced laterally due to surface cover.The Northwest mineralized area needs further exploration, in the foznn ofdrilling and trenching, to determine the continuity and grade of mineralizedstructures and to determine if they will be developed.North Sunset CanyonNorth Sunset Canyon is inside the northern part of the WSA (p1. 1) at theend of a 2 mi jeep trail through the SA. Two adits, a shaft, and severalprospect adits and pits are just inside the boundary.About 500 ft west of the jeep trail, an adit (fig. 17) was driven tointersect a quartz vein adjacent to a diorite dike that is exposed at the23

IIIIIIIIIIIIIIIIIIsurface about 100 ft above the portal. Inside the adit, sample no. 293 (table14) of the 3-ft-wide quartz vein contained 0.53 oz gold per ton, and sampleno. 290 contained 3.9 percent copper. A 2-ft-wide silicious zone adjacent toand above the quartz vein contained 0.08 oz gold per ton, and 0.24 percentcopper (no. 292). The vein has been stoped along dip for at least 50 ft, andis exposed down dip for about 20 ft in a winze. The northwest-striking veinis either cut off by a fault or pinched out to the south, as the vein wasabsent in the main drift (fig. 17). The northwest extent of the vein isunknown.Assuming a strike length of 120 ft, a width of 3.5 ft, and remainingmaterial that hasn't been stoped as 20 ft above and 50 ft below the adit, anindicated resource of 2,500 tons of material with an average grade of 0.28 ozgold per ton, and 1.03 percent copper, is estimated for the North SunsetCanyon mineralized area.Several pits, short prospect adits, and a shaft were dug to explore thequartz veins exposed at the surface (fig. 18). A sample from a stockpile ofvein quartz contained 0.11 oz gold per ton and 0.67 percent copper (no. 309,table 15). Sample no. 302 of the quartz vein at the shaft contained 0.07 ozgold per ton, and 0.06 percent copper.About 100 ft north of these quartz veins, an adit (fig. 19) was driven ona northwest-trending shear zone. Samples (table 16) from the adit showed theshear zone and country rocks to be essentially barren of mineralization.Outside the mineralized area, but within the SA near the mouth of NorthSunset Canyon, a short adit (fig. 20) was driven on a weakly defined structurein Precambrian gneiss. Samples from the adit showed the north-trendingstructure to be essentially barren of economic materials.24

IIIIIIIIIIIIIIIIIIThe North Sunset Canyon mineralized area is just inside the SA boundary.Further exploration, in the form of drilling and trenching would be needed todetermine the continuity, and to expand the indicated resource laterally andat depth. This area could be developed because of the hish gold and coppervalues and easy access.OTHER OCCURRENCESMarble (metamorphosed Paleozoic limestone) crops out about 1/4 mi southof the SA boundary near Arrastre Gulch and South Sunset Canyon, and at theWhite Marble Quarry, about 1/2 mi west of the SA boundary (pl. 1). The WhiteMarble Quarry is about 4 mi from Highway 60 and quarries in Arrastre Gulch andSunset Canyon are about 20 ml from Highway 60. Marble from Arrastre Gulch andSunset Canyon has been used as building stone, and marble from the WhiteMarble Quarry has been used for terrazo, precasting, roofing granules, stucco,mineral food, and polyester filler (Keith, 1969).The marble was not being mined in Sunset Canyon or Arrastre Gulch at thetime of the field investigation, but signs stated that claim assessment workhad been done for 1982. Mining activity at the White Marble Quarry isintermittent, according to the present caretaker. Operations at thesequarries will not extend into the area because the marble is not present atthe surface in the SA.Manganese deposits occur in Tertiary volcanlcs about 3 mi south of theSA. Pyrolusite, psilomelane, and manganite, the chief manganese minerals inthis area, occur in veins and fracture zones in volcanics that strike northand dip steeply west. The district has been prospected by extensive bulldozertrenches. An unknown amount of low-grade manganese ore remains in thedistrict (see Farnham and Stewart, 1958). Manganiferous Tertiary volcanic25

IIIIIIIIiIIIIIIIIrocks do not crop out in the SA and the nearest volcanic rocks containingmanganese are at sample sites 133-135, about 1-1/2 mi south of the SA.Barite and fluorite occur in northwest-striking fractures in a volcanicagglomerate about 3 mi south of Arrastre Gulch. Nearly 800 tons of about 75percent barite was shipped from this area and the vein appears to extendnorthwest for some distance. (See Stewart and Ptistor, 1960.) The bariteveins are parallel to, and possibly related to, the Harquahala Mountainfault. If the barite and fluorite bearing structure continues northwest for 6mi, it will be in the SA, but too deeply buried to be economic.Fluorite occurs 2 m£ south of the Blue Tank Canyon minerallzed area in afault that strikes N. 69 ° W. and dips steeply to the northeast. Drilling andtrenching in 1949 disclosed some high purity fluorite along with minor bariteand pyrite (see Denton and Kumke, 1949). This fault trends the same as theHarquahala Mountain fault and may be a related parallel fault.0il and gasWestern Arizona is largely unexplored for oil and gas. Thrust faults(overthrusts), block faults, gravity faults, and decollement faults, allpresent in the Harquahala Mountains, are possible structural traps for theaccumulation of oil and gas. The sedimentary rocks in the HarquahalaMountains have been highly metamorphosed, and there are no known reservoirrocks in the area. Extensive volcanic activity to the south, emplacement ofTertiary dikes and a granite pluton, and the high degree of metamorphism ofthe sedimentary rocks would probably have driven off any accumulatedhydrocarbons in the area. The valleys between the mountain ranges containabundant sediments, and would be a more likely source for petroleumenvironments. Although the Harquahala Mountains contain oil and gas lease26

!!!!!!!!!!!!I!!!!!applications, there has been no exploratory drilling and no known geophysicalwork done in the area.GeothemalTwo low temperature (

IIIIIIIIIIIIIIIIIIcommoditiesthat is actively explored for and mined in the wester~ U.S.Commodity statistics are from the Bureau of Mines Mineral Commodity Summaries1985.Domeatlc MsJor Net Average Expectedmine Apparent Icport import 1984 domestic OS demand MajorCon~nodit¥ ?roduction consu~klon Units Sources reliance ~rlce ~U.S.) through 1990 usesCold 2.3 4.8 million Canada, 16% 365.0010z Annual Jewelry,troy oz Switzerland, increase rate electronic.Uruguay of 2.0 percent dental,investmentCopper 1,050 2,100 thouaand Chile, Canada, 21% 0.66/lbme~ric tons Hexico~ PeruMINING FEASIBILITYAnnualincrease rateof 1.8 percentConstruction,electrical &electronic,industrialmachinery,transpertationCopper and 8old are present in the Havquahala WSA. Three factorsdetermine if these commodities can be mined profitably:of ore, the price of the product, and the cost of production.the grade and tonnageThe grade andtonnage of the ore has been calculated for some surface and undergroundmineralization.The deposits are small and of variable grade.Ore deposition at the mineralized areas are controlled by large-scalefaults and related structures. Hence, the question of continuity ofmineralized structures is added to the uncertainty of mineral development.The controlling factor for further exploration and development at any ofthe mineralized areas is the price of gold and copper.For several years theprice of copper has remained relatively low, while the price of gold hasvaried widely.A problem for the small company will be finding economic methods ofprocessing the medium-grade low-tonnage deposits, which are economically andenvironmentally attractive.Cyanide heap leaching and portable milling28

Ii|IiIIiIIIIIIIIIIIIequipment are environmentally sound and yet require small capital investment(See Eveleth, 1980.) Gold recovery by heap leaching is generally in the rangeof 65-80 percent. Other considerations with heap leaching would be thepresence of deleterious minerals which increase cyanide consumption and someoxidized sulfides which prevent successful heap percolation. Laboratory testswould be required to determine the amenability of the mineralized material toheap leaching.The U.S. Bureau of Mines Research Center in Reno, Nevada has beenimproving the cyanide-leach process since 1950. They also have informationregarding proper grinding size, reagent consumption, and optimum leach cycletime, but only extensive testing can determine the economics.The competent wall rock, found at most of the mineralized areas, allowsthe open stoping method of mining to be employed, which is probably one of thecheapest methods for mining a thin vein deposit.CONCLUSIONSIn the studied part of the Harquahala Mountains, ten mineralized areaswere identified. Mineralization occurs in and near diorite dikes related tolarge northwest-trending faults. Five mineralized areas are wholly orpartially inside the SA, and two are adjacent to the boundary. The threemineralized areas completely inside the SA are the Northwest, North SunsetCanyon, and Crown Prince areas. The Linda Mine and Harquahala Mountain areasare partially within the SA. The Sunshine Mine and Browns Canyon mineralizedareas are adjacent to the SA boundary, and Dushey Canyon, Arrastre Gulch, andBlue Tank Canyon mineralized areas are outside the SA.In the Northwest mineralized area, about 1/4 mi inside the northwestboundary, gold and copper occur in a fracture zone. An indicated resource of29

IIIIIIIIIIIIIII!III900 tons, and an inferred resource of 2,400 tons of materlal with an averagegrade of 0.03 oz gold per ton and 0.87 percent copper, is estimated to bepresent.The North Sunset Canyon mineralized area, in the north central part ofthe SA, is accessible by a jeep trail that has been excluded from the SA. Anindicated resource of 2,500 tons of rock with an average grade of 0.28 oz goldper ton and 1.03 percent copper is estimated for the North Sunset Canyonmineralized area.The Crown Prince mineralized area in the east-central part of the SAcontains gold-bearing quartz veins, but because of a lack of development onthe veins, no resource can be identified with data available at this time.The quartz veins require further surface and/or underground exploration todetermine the extent of mineralization.The mineralized areas that warrant further exploration to determine theextent of mineralization are: the Sunshine Mine, Linda Mine, Arrastre Gulch,Blue Tank Canyon, southern part of Harquahala Mountain, and North SunsetCanyon. The Dushey Canyon, Browns Canyon, Crown Prince, northern part ofHarquahala Mountain, and Northwest mineralized areas have a lesser prospectfor further exploration.All the mineralized areas contain evidence of previous miningoperations. Resources have been calculated using available data. Drilling oneach property, either on the surface or underground, and drifting underground,are needed to prove reserves and delineate ore zones. Openin8 up old smallmines and producing ore at a profit is very difficult and expensive. Water inthe area is scarce, and electricity is non-existent in the HarquahalaMountains SA. The known ore bodies are thin veins of unknown length and30

IIIIIIIIIIIIIIIIIIIinsufficient grade and tonnage to attract the interest of a large miningcompany but may be attractive to some small ambitious mining companies. TheHawke Goldmining Company Ltd., is presently conducting operations at theSunshine and Linda Mine mineralized areas and should be observed to see ifmining in the Harquahala Mountains is economically feasible at this time.SUGGESTIONS FOR FURTHER WORKThe Crown Prince mineralized area is in the east-central part of the areaand could contain resources of gold. DrillinE at the shaft would be needed todetemine if gold reserves are present in this part of the SA. Access to themineralized area would require a road probably from a "cherrystem '°. TheNorthwest mineralized area, which is less than 1/4 mi inside the WSA boundary,contains small identified resources. At present, these resources aresubeconomic. Drilling would be needed to delineate possible reserves.The North Sunset Canyon mineralized area and access road to it have beenpartly excluded from the SA. The identified resource is slightly within theSA as now drawn.The Linda Mine, Browns Canyon, and Harquahala Mountain mineralized areasare just outside the WSA boundary. Detailed mapping, sampling, and geophysicswork would be needed to verify that identified mineralized structures extendinto the WSA.The Sunshine, Dushey Canyon, Arrastre Gulch, and Blue Tank Canyonmineralized areas are either more than a mile from the WSA, or do not projectinto the SA.31

I!IiI!iIIIIIIIIIIREFERENCESConey, P. J., 1980, Cordilleran metamorphic core complexes: an overview, i__nnCordilleran metamorphic core complexes: The Geological Society ofAmerica Memoir 153, p. 7-33.Davis, G. H., 1980, Structural characteristics of metamorphic core complexes,southern Arizona, in Cordilleran metamorphic core complexes: TheGeological Society of America Inc., Memoir 153, p. 35-77.Davis, G. A., Anderson, J. L., Frost, E. G., and Shackelford, T. J., 1980,Mylonitization and detachment faulting in the Whipple-Buckskln-RawhideMountains terrane, southeastern California and western Arizona, i_n_nCordilleran metamorphic core complexes: The Geological Society ofAmerica Memoir 153, p. 79-129.Denton, T. C., and Kumke, C. A., 1949, Investigation of the Snowball fluoritedeposit, Maricopa County, Arizona: U.S. Bureau of Mines Report ofInvestigations 4540, 15 p.Eveleth, R. W., 1980, New methods of working an old mine: a case history ofthe Eberle group, Mogollon, New Mexico i__nn The future of small scaleminins. McGraw-Hill, New York, New York, 333-339.Farnham, L. L., and Stewart, L. A., 1958, Manganese deposits of westernArizona: U.S. Bureau of Mines Information Circular 7843, p. 13-25.Keith, S. B., 1969, Limestone, dolomite and marble, in Mineral and waterresources of Arizona: Arizona Bureau of Mines Bulletin 180, p. 385-398.Levinson, A. A., 1980, Introduction to exploration geochemistry, AppliedPublishing Ltd., Wilmette, Illinois, 924 p.Park, C. F. Jr, and MacDiarmid, R. A., 1970, Ore deposits, W. H. Freeman andCompany, San Francisco, California, 522 p.Rehrig, W. A., and Reynolds, S. J., 1980, Geologic and geochronologicreconnaissance of a northwest-trending zone of metamorphic core complexesin southern and western Arizona, i__nn Cordilleran metamorphic corecomplexes: The Geological Society of America Memoir 153, p. 131-157.Spencer, J. E., 1984, Geometry of low-angle normal faults in west-centralArizona: Arizona Bureau of Geology and Mineral Technolosy Fieldnotesvol. 14 no. 3 p. 6-9.Stewart, L. A., and Ptistor, A. J., 1960, Barite deposits of Arizona:Bureau of Mines Report of Investisations 5651 p. 37-39.Wilson, E. D., Cunningham, J. B., and Butler, G. M., 1934, Arizona lode goldmines and gold mining: Arizona Bureau of Mines, Bulletin no. 137p. 128-134.32U.S.

i!mREFERENCES--ContinuedWitcher, J. C., Stone, Claudia, and Hahman, W. H., St., 1982, Geothermalresources map of Arizona: National Geophysical and Solar-TerrestrlalData Center, National Oceanic and Atmospheric Administration, scale1:500,000.ill,]L':mi!imiii{ii:~ ..../imm!~xi33

m m m m m m n m m m m m m m m m m m mTable l.--Summary of information resarding mineralized areas in and near the Harquahala Mountains Study Area.[Possible by-products shown in parenthesis.]L~Mineralized area,sample numbersSunshine Mine,outside the WSA,samples 1-25.Linda Mine, partlyinside the WSA,samples 28-56Dushey Canyon,outside theWSA, samples64-82.Browns Canyon,outside theWSA, samples83-112.GeoloByDevelopment andCommodities Set,in 5 Deposit production Resources*Au, Cu, (Zn, Precambrian granite, Quartz veins 1 inclined shaft Medium*Pb). gneiss, schist; trending with 2 levels, Au, Ag.Tertiary diorite east, dips 5 shafts, 2 addikes,south, its. 4 prospectpits. Small Au,Ag production.Au, Ag, (Cu, Tertiary granite, Breccia zones 4 adits, 2 shafts, MediumPb, Zn). contact with Pre- trending 5 prospect pits. Au, Ag.cambrian granite, northeast; Small Au, Agfracturedproduction.granite.Au, Ag, Cu, Precambrian granite Quartz veins 2 adits with Medium(Zn, As). gneiss; Tertiary trending shaft, 4 pro- Au, Ag,diorite dikes, west, dips spect pits.south.Small Au, Agproduction.Ag, Cu, (Pb, Precambrian granite, Breccia zones 6 bulldozer SmallZn, Ba, gneiss, diorite trending trenches, 2 Ag, Pb,Au). dikes, northwest, prospect pits. Cu, Zn.*For definition of low, medium, and high, see end of table.

m m n m n m m m m m m mm m m m m m m mTable 1.--Summary of information resarding mineralized areas in and near theMarquahala Mountains Study Area--ContinuedMineralized area,sample n11mhersGeologyDevelopment andCommodities SettinB Deposit production ResourcesCrown Prince, Au, Ag, (Cu, Precambrian granite, Quartz veins 2 adits, 1 shaft. Smallinside the WSA, Pb, Zn). gabbro; Tertiary trending 2 prospect pits. Au, Ag.samples 113- diorite dikes, west. Small Au, Ag132. production.Arras,re Gulch, Au, Ag, Cu, Mesozoic granite, Quartz veins 7 shafts, 1 pro- Mediumoutside the (Pb, Zn). gneiss, gabbro, trending spect pit. Au, Ag,WSA, samples diorite dikes, northwest. Medium Au, Ag; Small Cu,136-162. Small Cu, Pb Pb, Zn.production.t~Blue Tank Canyon,outsidethe WSA,samples 174-203.Harquahala Mountain,partiallyinside the WSA,samples 204-234,237-252.Northwest, insidethe WSA, samples267-272.Au, Ag, Cu, Precambrian granite, Quartz veins 4 adits, 1 shaft, MedlumAu,(Pb, Zn, gabbro, gneiss, trending 2 dozer trenches, Ag, Cu;V). diorite dikes, northwest. 2 prospect pits. SmallMedium Au, Ag, Pb, Zn.Cu production.Au, Ag, Cu, Precambrian granite, Quartz veins 3 caved adits, MediumAu,(Pb, Zn). gneiss; Tertiary trending 1 dozer trench, Ag, Cudiorite dikes, northwest. 17 prospect outsidepits. Medium Au, the WSA.Ag; Small Cu.Au, Cu, (Ag, Precambrian granite, Fractured 2 short adits, Small Au,Ba). granite gneiss, quartz Small Au, Cu Cu.veinsproduction.trendingwest.

m m mm m n m m m m m n m m n m m m m mTable l.--Summary of information resardin 8 mineralized areas in and near theHarquahala Mountains Study Area--ContinuedMineralized area,sample numbersGeolosyDevelopment andCommodities Settin~ Deposit production ResourcesNorth SunsetCanyon, insidethe WSA,samples 278-333.Au, Ag, Cu,(Zn, Pb).Precambrian granite,granite gneiss,schist; Tertiarydiorite dikes.Quartz veins,fault zonestrendingnorthwest.3 adits, 1 shaft,prospect pits.Small Au, Cuproduction.Medium Au.Small Cu.~oO~For purposes of this report the following definitions are used:Small production or resource: gold--less than 200 ozsilver--less than 2,000 ozcopper or lead--less than 20,000 IbModerate production or resource: gold--200-2,000 ozsilver--2,000-20,000 ozcopper or lead--20,000 -200,000 lb

IIIIIIIIINo.I1314Headframe ~ LP4r~Ar ~¢ ./~.20 FEET ; t20 18v .I ^"7 pt, 1-'1>•" ,1P .o19qc JtqjI.•V14l-GraniteW t-)I-,1 I.I 16'LSee cross sec$ionskelch al left17Analytical dataAu A~ Cu Fe Znoz/tonpercent0.14 -- -- 2.9 --.10 -- 0.01 4.5 0.008Other0.02 Sr152.02.0-ft-thick quartz vein; hematite, eptdote..21 -- .009 4.8 .001.01 Sr2.50.9-ft-thick quartz vein; hematite, epidote..02 6.0 .02.02 Sr17.80.8-ft-thick quartz vein; hematite, chrysoeolla..06 - - .19 N k - -.01 Pb181.5Altered granite gneiss; epidote.• 02 0.2 .07 NA .00819riII.43.00.3-ft-thlck quartz vein; hematite..17 NA - -Altered granite gneiss (above vein); hematite. .02 -- .02 NA - -Figure 3.--Map of the Sunshine Mine showing sample localities 13-20.37.01 Pb.01 Sr

Partly caved portal/:,~ v.IIII0It-N-I0It20 FEETIGraniteLoose rock slobsfrom here to portal2-/.,'-4.

BB ~ NB ~ ~ ~ NBI BIB Itl ~ IBBI Ill IBm IBm IBm mBI Kin IBm BB iTable 2.--Data for samples from the Sunshine Mine stet area not shown on Figures 3 and 4.[For all samples: ---, tested for but not detected; NA, not analyzed for; xxx, not applicable; Cu,Pb, Zn, and Fe determined by atomic absorption, except *, determined by spectrographic analysis;Other, significant elements determined by spectrographic analysis.]No.TypeSampleLength Au A8(ft) Description oz/tonAnalytical dataCu Fe ZnPercentOther4 Chip2.0 Diorite dike, strikes N. 75 ° W., dips . . . . . . 0.14 6.1 ---80 ° N.; calcite, azurite, chrysocolla.5 do.3.0 Diorite dike, strikes N. 74 ° W., dips --- 0.i .01 7.947 ° N.; epidote, calcite.0.0086 do.7 do.8 do.2.0 Fault, strikes N. 76 ° E., dips 75 ° N., .16 7.3 .20EouEe, hematite, llmonlte, calcite.5.0 5.0-ft-thlck quartz vein, strikes N. 78 ° W., 0•15 --- .008 2.1 .01dips 74 ° N.; hematite.1.5 Fault, strikes N. 85 ° E., dips 74 ° N.; --- .1 .16 6.1 .01Eouge, epidote, hematite, limonlte.0.04 Sr9 Grab xxx Granite; quartz, hematite. .08 .i ---10 Chip 3.0 0.8-it-thick quartz vein, strikes N. 75 ° E., .I0 ------II Select xxxdips 50 ° S.; hematite, calcite.quartz stockpile; hematite, limonite. 2.17 . . . . . .NA .01"NA .01"i2.9 .03*.08 Sr• 06 Sr12 Chip 3.5Granite; hematite• - . . . . . . . .3.3 ---.04 Sr21 do. 3.50.8-ft-thlck quartz vein, strikes N. 85" E., .05 . . . . . .dips 60" S.; granite; hematite.NA .03*22 do. 1.01.0-ft-thlck quartz vein, parallel to above .81 .2---vein, but 15 ft away; hematite.NA•01"

m m m n m m m n m n m n m m m n m m mTable 2.--Data for samples from the Sunshine Mine stet area not shown on Fisures 3 and 4--ContinuedSampleAnalytical dataLenEth Au A S Cu Fe Zn OtherNo. Type (ft) Description oz/ton percent23 Chip 3.5 Granite, diorite; hematite, epidote. 0.02 0.2 --- NA 0.01" 0.02 Sr24 Grab xxx Granite; epidote, hematite. .01 . . . . . . NA --- .03 Sr25 Chip 2.0 1.5-ft-thlck quartz vein, strikes N. 75 ° W., .01 .1 0.03* NA .01" .01 Sr26 Select xxx Gneiss; masnetite, hematite, epidote. --- .3 --- 41.0 .01 .i0 Te27 Grab xxx Granite; hematite, epldote. --- NA --- .02 Sr

IIIIIIIIIIIIIIIII34_E35Linda Mine ISee figure 58.:{.x~o52-55X36. 37 \X56Harquahala Mountains Study Area0 200 400 600 800 I000 1200 1400 FEETI I t I I I I I I I I I I I IEXPLANATION.q~v~'~APPROXIMATE BOUNDARY OF THE HARQUAHALA MOUNTAINS WILDERNESS STUDY AREAAPPROXIMATE BOUNDARY OF THE LINDA MINERALIZED AREABRECCIA ZONE)--38-49 . Adit"XSI~]35 ShoftSURFACE OPENINGS--Showing sample number(s)Prospect pit."--3400"--; CONTOUR--Showing elevotion in feet above sea levelFigure 5A.--Map of the Linda Mine mineralized area showing samplelocalities 28-56.41-N-

m m m m m m n m m m m m m m ml mmTable 3.--Data for samples from the Linda Mine stet area shown on FiBure 5A.LengthNo. Type (it)28 Grab xxx29 Chip 3.0SampleAnalytical dataAu A R OtherDescription ozlton percentGranite; epidote. Tr --- 0.01 Zn.01 SrFractured granite; quartz, hematite.30 do. 3.0Fractured granite; abundant hematite, quartz.0.12 ---31 do. 3.0Diorite dike, strikes N. 25 ° W., dips vertical;epidote, calcite..29 0.1.01 Zn.02 Sr.01 V32 Grab xxxGranite; hematite, epidote.¢-t~33 Select xxxGranite; abundant hematite, pyrite, quartz..8334 Grab xxxGranite, schist; chlorite, hematite..1135 do. xxxGranite, schist, diorite; hematite, calcite..02Tr36 do. xxxBreccia zone, strikes N. 20 ° E., dips 44 ° E.;calcite, hematite..04Tr37 do. xxxGranite; hematite stains.Tr.01 Sr50 do. xxxGranite breccia, schist;abundant hematite..01Tr51 do. xxxGranite; calcite, hematite.Trm w ~52 do. xxxGranite, schist; quartz, hematite stains..0253 Select xxxGranite; hematite, limonite, vuggy quartz..23.1

m m m m m m m m m n m m m m m m m m m +Table 3.--Data for s-mples from the Linda Mine stet area shown on Figure 5A--ContinuedMO°54S-mpleAnalytical dataLength Au AK OtherType (ft) Description oz/ton percentChip 5.0 Breccia zone, strikes N. 35 ° E., dips steeply;calcite, hematite.0.2455SelectxxxGranite; hematite, pyrite, limonite. .15 1.256Chip 3.5Breccia zone, strikes N. 75 ° X., dips vertical;Eranite, hematite, limonite..05~o!iii;:!:iii~TiL!;Ii!iL!!iiilii:

__-~ . . . . :; :!- • ~!~E!!il,°/4--00~> 4V "..I,.q~"t-1|-L-/ /. > P, /,.. V> ~0,¢.~"t '¢ "t~- • t. p )"7m• ¢~ q-" /~'/.pAQtO.qvt...4|..,,%0'~.~ .,,"~ 4/.,,,T"CO"J L7V% ~"V ~ 4/.-* "V ~ ~ /~~. -/h vOJroq,.w~1 •-.,,: ~ , ; ~ , - J •~°~ = ' I r'7"Tv~' uF-t,,IJt.~tJ.o_CO0Figure 5B.--Map of the Linda Mine showing sample localites 38-49.44

mm m m m m -n m mm n m n m n mm mm m m n mmTable 4.--Data for samples from the Linda Mine shown on FiRuce 5B.No.Length of chip(ft)SampleDescriptionAnalytical dataAu A$ Cu Pb Zn Otheroz/tonpercent38 4.039 3.540 2.0Fault gouge, hematite, epidote.Diorite dike; epidote, calcite, hematite.Fault gouge, granite, hematite.0.01 Sr.01 Sr41 3.042 1.0Granite; hematite.Diorite dike; calclte, hematite.---y . . . . . . . . . .O. 1 . . . . . . 0.0443 2.0Fault gouge, diorite, calcite.Tr --- O. 01"• 02".01 Sri-- 44 2.0L.nFault gouge, hematite, diorite, calcite.Tr . . . . . .• 02".01 Sc45 4.0Fault Eouge, hematite, diorite, calclte.• 01" 0.10"• 20" .01 Sr46 3.0Granite gneiss; quartz, hematite..01 *47 3.0Fault gouge, granite, hematite, malachlte.. I0" .01".03"48 3.0Granite; hematite stains.49 4.0do. .4--- .03 As

m n m m m |.m I n i n m m mm i m i m n ~r0 ~ 20 FEET~.., i i, I Partly 64.portal~, cavedv-, ,r"~t >,,, > =% ^ ~ > t" ~ ~, >v > ~ -I 4 .1 v >,, s r ~¢..,~r ~ • ~1 < "~ -~'~ ~"' ~'~'~"~'~ vv"- . •",', ,' '' ",'i -'~ ",, /', ,-~,7 ~ ..

mn m B m ml n n ml m m m n m m B m ~o nTable 5.--Data for samples from the adlt in the Dushey Canyon mlneralized area shown on FiRure 6.NO.SampleAnalytical dataLength of chip Au Ag Cu Pb Zn Other(ft) Description oz/ton percent64 2.5 2.0-ft-thick quartz vein; gouge, chalcopyrite, Tr 0.01 ......epidote.Upper 0.6-ft-thick quartz vein, hematite.65 .6 Tr . . . . . .Gouge between quartz veins; phyllite; hematite.66 .8 Tr0.02 Li.03 As •Lower 1.0-ft-thick quartz vein; hematite.67 1.0 . . . . . . .01¢-~J2.0-ft-thick quartz vein; gouge, epidote.68 2.0 0.01Fractured granite; abundant hematite.69 2.5 0.1 ---Granite; epidote, hematite, quartz.70 3.0 --- .1 ---71 1.0 Fault gouse, brecciated granite, epidote, hematite. Tr .i .03*72 5.0 Four 1.0-ft-thick quartz veins, hematite;Tr --- .03interbedded with thin layers of phyllite.Granite gneiss; hematite, epidote.73 2.0 . . . . . . .08Crumbly granite; fault gouge, hematite, limonite.74 1.5 .01 .1 .10"Altered granite; hematite•75 1.5 .01 --- .09--- .03 Sr0.01" .01 Sr.02* .02 Sr.03* .02 Sr.02 Sr• 02 S£3.0-ft-thick quartz vein; abundant hematite.76 3.0 .07 .O2• 05As

No.TypeTable 6.--Data for samples in the Dushey Canyon mineralized area not shown on FiBure 6.SampleAnalytical dataLength Au A~ Cu Pb Zn Other(ft) Descriptionoz/ton percent59 Chip3.5 3.O-it-thick quartz vein, strikes N. 60 ° W., 0.05 . . . . . . . . . . . . 0.03 Asdips 24 ° S.; abundant hematite.60 do. 1.5 Fault, strikes N. 60 ° W., dips 37 ° N.; EouEe--- 0.1 0.18 --- 0.03 .03 Ashematite, malachlte.61 do. 4.0Massive quartz vein, strikes N. 85" W., dips28 ° S.; abundant hematite.62 do. 4.0 Granite; quartz, hematite, limonlte.63 do. 3.0 Granite; abundant quartz, hematite. - . . . . . . . . . . . . . . . .03 As77 do. 2.5 2.5-it-thick quartz vein, strikes N. 75 ° W., .01 . . . . . . . . . . . . .02 Srdips 30 ° S.; abundant limonite, hematite.78 Grab xxx Diorite dike, strikes N. 70 ° W., dips steeply; Tr . . . . . . . . . .01 .02 Srepidote, hematite.79 Select xxx Vein quartz, hematite, chrysocolla, chalcopyrite. .14 .2 1.0 ......80 Chip 2.0 Schist; epidote.Tr .1 .1" --- .01" .10 Sr81 Select xxx Vein quartz, vus~y hematite, abundant limonite. .43 . . . . . . . . . . . . .03 As82 do. xxx Vein quartz, pyrite, hematite, llmonlte..04 . . . . . . . . . . . . .0~ As

m m m m m m m m m m m mm m m m n m m mTable 7.--Data for samples from the Browns Canyon stet area shown on Plate 1.SampleAnalytical dataLength Au Ag Cu Pb ZnNo. Type (ft) Description oz/ton percentOther83 Chip 4.0 Brecciated diorite; hematite. - . . . . . . . . 0.05" 0.08* 0.01 Sr84 do. 4.0 Brecclated diorite; granite; hematite. Tr 0.1 --- 2.0* .9* >10.0 Ba.03 Sr85 do. 3.0 Breccia zone, strikes N. 27 ° W., dips 40 ° N.; . . . . . . .02 .03diorite; abundant hematite.86 do. 3.0 Granite; hematite. - . . . . . . . . . . . .01"87 do. 2.0 Brecciated diorite; gouge, hematite. - . . . . . . . . .02* .3*88 do. 2.0 Granite; hematite. - . . . . . . . . .03* .1" .01 Sr89 do. 4.0 Altered granite; chlorite, hematite. --- .8 . . . . . . .09* .03 As90 do. 4.0 Brecciated granite; hematite. --- 1.6 --- .05* .i* .04 Li91 do. 4.0 Altered granite; hematite. - . . . . . . . . . . . .06* .01 Li92 do. 2.0 Brecciated granite; diorite; chlorite. --- .I ...... .02*93 do. 4.0 Brecciated granite; hematite. --- 1.0 ...... .09" .03 Li94 do. 4.0 Altered granite; chlorite, hematite. --- .6 . . . . . . . . . .03 As95 do. .5 Shear zone, strikes N. 15 ° W, dlps 65" N.; Tr --- 0.07* ...... .03 Asgranite clasts, gouge, hematite.96 do. 4.0 Granite; hematite, malachite. Tr --- .23 ...... .03 As.01 Sr97 do. 1.0 Shear zone, strikes g. 35 ° W., dips 60" g.; Tr . . . . 1"granite clasts, hematite.

m m m U m U U M m B m U m m U m m m mTable 7.--Data for samples from the Browns Canyon stet area shown on Plate 1--ContinuedSampleLengthNo. Type (ft) DescriptionAnalytical dataAu A R Cu Pb Zn Otherozltonpercent98 Chlp 2.099 do. 3.0100 do. 1.3101 do. 4.0102 do. 2.0103 do. 1.3Fault, strikes N. 25 ° E., dips 70 ° S.; ......gouge, abundant hematite.Granite; hematite. - .....Shear zone, strikes N. 75 ° W., dlps 50 ° N.; ......diorite; hematite, chlorite.Granodiorite; chlorite, hematite. - .....Granite; hematite. - .....Fault, strikes N. 25 ° W., dips 55 ° N.; gouge, ......granite clasts, hematite.O. 03* --- 0.1"--- .02*...... 0.02 Sr0.01" .06* .01 LitnO104 do. 2.5Diorite; abundant hematite. Tr ---.02.--- .i*105 do. 4.0Granite; hematite. 0.01- - r a m...... .03 As.01 Sr106 do. 4.0Diorite; chlorite, epidote. --- 0.1.01Sr107 do. 4.0Granite; hematite. Tr ---m u m.01 Sr108 do. .40.4-ft-thick quartz vein, strikes N. 80 ° W., ......dips 60 ° N.; gouge, hematite, chlorite.• i*.01Sr109 do. 4.5110 do. 1.0111 Select xxxGneiss; chlorite. Tr ---Breccia zone, strikes N. 35 ° W., dips 50 ° N.; Tr .3abundant hematite, quartz.Silicious fluorlte, abundant hematite. Tr 1.8--- .06" .01 Sr2.0* .4* >I0.0 Ba.06 Sr.2* .03 Li23.6 CaF 2112 Grab xxx Granite; hematite. Tr --- .02 --- .02 .03 Sr

1 1 1 1 1 1 1 1 1mlmmm m l m m114"--'-, v ,,v- Granite " v115Gabbro120 ~Diorite dike ,~_~122~. -~ ~"r" 4"~4I._. ~' "= 121Granite132'18it shaft~." ~ ~ / ~to surface .~^) '.vj--'re"A~-*-~E- 4-Grar~ite'131" Gabbrol)V V~¥ &Lr129 ," ,~.Gronlt~I-.4•20r 127Gabbro. ;'-'." ";. ,"_~7 t ,, ,,~124- ~ ~7 Z ~,,':':,,'" 4;', ~:.,,.-~_~• " ~'~.55:;,L~-~ 123 -N-.~,'? C~ I I I , I;.71-;VV. ~I ~/'/r', :Granite).6128Diorite dikeFiEure 7.--Nap of the Crown Prince mineralized area showln E sample localities 114-132.

Table 8--Data for samples from the Crown Prince stet area shown on Figure 7.SampleAnalytlcal,dataLength of chip Au Ag Cu Pb Zn OtherNo. (it) Description oz/ton percent114 1.0 1.0-ft-thick quartz vein; gouge hematite.115 3.0 Unaltered granite, hematite.116 .5 0.5-it-thick flat-lying quartz vein; hematite,pyrite.0.03 ---.08 ---.51 Tr--- 0.01 ---117 4.0 Unaltered granite; hematite.. . . . . . . . . . . . . . .118 .4 Fault gouge; abundant hematite, epidote. --- 0.1 0.1 .01 0.07119 5.0 Altered gabbro; hematite. - . . . . . . . . . . . ,02120 4.0 Unaltered granite. - . . . . . . . . . . . . . .121 1.5 Fractured diorite dike; epidote. - ..... .01 --- .01122 4.5 Altered gabbro; hematite. - . . . . . . . . . . . .01"123 4.0 Altered gabbro; hematite, epidote. --- Tr .01 --- .010.02 Sr.05 Sr.01 Sr.02 Sr.02 Sr.02 Sr124 2.0 Unaltered granite. - . . . . . . . . . . . . . .125 5.0 Unaltered granite; hematite.. . . . . . . . . .01 *i ---.02 Li.01 Sr126 3.0Altered gabbro; epidote..07 Sr127 .6Altered diorite dike; hematite, epidote.Tr .01.07 Sr128 2.0Altered granite.Trm ~ N129 2.0do.

Table 8--Data for samples from the Crown Prince stet area shown on Fisure 7--ContlnuedSampleAnalytlcal dataLength of chlp Au Ag Cu Pb Zn OtherNo. (ft) Description oz/ton percent130 3.0 Altered/weathered gabbro. - . . . . . 0.02 --- 0.'020.02 Sr131 1.0 0.5-ft-thick quartz vein. 0.15 2.1 --- 0.02* .01.132 .5 0.5-ft-thlck fractured quartz vein; hematite. 1.32 .2 .01 .02 .01The following sample was taken from a prospect in the mlnerallzed area, about 1/2 ml NE of the above workings.No.TypeSample Analytlcal data ,Length Au A S Cu Pb Zn(ft) Description ozlton percentOther113 Selectxxx Shear zone, strikes N. 50 ° W., dips 25 ° N.; . 0.15 0.1 0.01 0.01 ---quartz, hematite, pyrite.

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 !,~--N-Shaft collar47GneissO IO 20 FEETI i I I I148 (from both veins).~\~.~See cross section~,~.~.~/,\ ? sketch at left151Diorite156.57 ° -2"2Stopedup157of gneisske rockCross section sketch at shaft160159 158Figure 8.--Map of a shaft in the Arrastre Gulch mineralized area showing sample localities 146-160.

m m mm m mm n m n n m m n n m m m m m mTable 9--Data for samples from a shaft in the Arras,re Gulch mineralizedarea shown on Figure 8.SampleAnalyticaX dataLength of chlp Au Ag Cu Pb Zn OtherNo. (ft) Description oz/ton percent146 0.6 0.6-ft-thick quartz vein; hematite, chrysocolla. 0.47 0.1 0.80 0.04 0.06147 .4 0.4-ft-thick quartz vein; hematite, chrysocolla. .10 --- .39 .06 .06148 .7 0.7-ft-thlck quartz vein; hematite, chrysocolla. .20 --- .98 .09 .07149 1.5 Unaltered diorite dike; hematite, calcite. Tr --- .04* --- .02*150 1.0 Unaltered diorite dike; hematite, malachite. Tr --- .34 --- .04151 1.2 Brecciated 1.2-ft-thick quartz vein; hematite. .25 --- .40 .11 .040.01 Sr.03 Sr.03 Sr.03 Sr.05 Sr.04 Srt~152 .2 0.2-ft-thick epidote vein; hematite, limonite. Tr --- .13 --- .03153 .6 0.6-ft-thlck quartz vein; hematite, chrysocolla, .21 --- 1.4 .04 .07calcite.154 .5155 .7156 .3157 .5158 2.5159 .9160 1.20.5-ft-thlck quartz vein; epidote, hematite. Tr --- .II .02 .010.7-ft-thick quartz vein; hematite, chrysocolla. .28 --- .25 .02 .05Epldote and calcite veinlets; hematite. Tr . . . . . . . . . . . .Fauit gouge; hematite, limonite. Tr --- .04 ---) .02Augen gneiss; hematite. .01 .03* --- .06*0.9-ft-thlck quartz vein; hematite, calcite. .22 --- .27 .03 .041.2-ft-thlck quartz vein; hematite, calcite. 2.07 .1 .26 .03 .01.1 Sr.02 Sr.07 Sr.02 Sr

m m m m m m m m m m m m m m m m m m mTable lO.--Data for samples from the Arrastre Gulch mineralized area not shown on Figure 8..o.TypeLen6th(ft~SampleDescriptionAnalytical dataAu AR Cu Pb Zn Otheroz/tonpercent136 Chip 2.0137 Select xxxFault, strikes N. 40 ° W., dips vertical;hematite, limonite, quartzQuartz vein, strikes N. 35 ° W., dips 45 ° N.;abundant hematite, pyrite.O. 25 0.08 O. 05 0.01 V• 07 .03 .01 .04 V138 Grab xxxDiorite; calcite, hematite. .04" .01 Cr.01 Ni139 Select xxxQuartz vein, strikes N. 30 ° W., dips 62 ° N.;abundant hematite, pyrite.0.24 .04 .01tnO~140 Grab xxx141 Select xxxDiorite;hematite, epidote.Quartz vein, strikes g. 30 ° W., dips 70 ° g.;abundant hematite, epidote, pyrite.lTr . . . . . . . . . .01" .01 Cr.01 Ni• 12 ...... .02 V142 Grab xxx143 do. xxxGabbro; hematite. ...... .02" .03 SrDiorite; epidote, hematite. --- --- .01" .u~ ^" Li144 Select xxxQuartz vein, strikes N. 62 ° W., dips 65 ° M.;abundant limonite, ~oethite.• 07 --- .06 .01 !145 Grab xxxEptdote vein next to above quartz vein; pyrite. - ..... .03 ...... .1 Sr161 Chip 4.0162 Select xxxAltered granite zone, strikes N. 70 ° W., dipsvertical; hematite, epidote, quartz.Quartz vein, strikes N. 60 ° W., dips vertical;abundant hematite, calcite.Tr .02 .02 .03 Sr.05 .01 --- .03 V

IIIIIIIIIIIiLength of chip• (etp167 3.52.03.02.01.5O.S1.00 I0 20 FEET' I t ISampleDescrIptlonSkarn; calcite, hematite.#$!Diorite; hematite, calcite, epidote.Skarn; hematlte, calcite.do.Altered diorite; hematite.Skatm; quartz, hematite.Altered diorite; hematite..~"Skarn.~S__~/ 170=/~..~/... ~'- 1695ft concrete portalwith gateAu A~oz/ton-- 0.iAnalyticalCu--- -- 0.01TF . . . .--- .1 .01Tr .1 ---mdataPb Zn Otherpercentm0.01--- 0.01 Sr-- .03 V-- .02 ¥0.01 .01 Sr.01 .03 V--- .02 VFigure 9.--Map of an adit near the Blue Tank Canyon mineralized areashowing sample localities 167-173.57

IIIII| ? , , ~p ~,IIIIIIIIITypeLength(ft)SampleDescriptionChip 1.0 Fault gouge , hematite.do 3.0 Gneiss; hematite.epFi,~i •J~ #.,-"i-.+'|~+i 'I;w.t.,-i +a..","I'• +iiGabb,ro;"." b."I~+I t*. t"+..~+~C'V|• 7, ,','J"+'- ~'+I>, '_?~,2T,;,'2-,tot *'.t-~x,.• ~l. •• i I'~1~,.t'.', ~'.;-

I I IBm I i II mE Ill aim II II Jim II II Ill I I I-N-.. ,.)~: .I, ~-::-~.,P ~'-~-..v, ,..-- 40 FEET 188., ..~.~,..,.~,.~ • .J,,,% r ~-" ° ~,~ t,, ~;- .(..r:,.~,; , I ~''t'';~L" ",';',0:~" . . . . . . .15Oft ~een-_(~,,-~.~ 85~.~',~J~ ;';,,:t;~;~,i; " ;~:;~..'-T4.~!':;: ~/~.~."-'.'~}~.'~-;~,~?,'.¢Y,:.;,-...,,, All sfopln(J In 1his fi ur , ._ _ . i , , ~ ~ . - . , . ~ . , ~ la,- ,.,.. J~o ~ ~ : " ~ ' ' _ ' " -_ . . . . . . . . JTO~';] [~-:J~-':~,_3~'.~',/"~','l;,clF-,'~';'~f~,~.?~ •. ,., ~ ,;,~-.~,-. -,~ ...~ ...... ,-,.:~,..,~'~ .... ~ r-,: ~--L~, ,~ ")~ -.',,:~ "'V'.:.~.',.~ ,,;;,.'~-,'.:p~'f;~;; ',.-" ~- ¢ ~;~.":-.,~.;~,~,. ~ r.~C,-~.; ,.;~:: ";,~, :j't;', -~.;-; ~.:~-~---180 182 185 ~oo IP."Sample • Analytical data.Length of chip I'Au A~ .Cu Pb Zn OtherNO. (it) Desc~iption oz/ton percent177 0.4 Fault 8ou~e, diorite, hematite. Tr N_ 0.01 . . . .178 1.5 Diorite; quartz vein; hematite, chrysocolla. 0.48 0.7 1.9 0.02 ---179 1.5 quartz vein; hematite, chrysocolla, pyrite. .17 .2 2.9 --- 0.010.01 LI• 01Ll.02 V1801811821831841851861871881893.0 Quartz vein; hematite, azurite, ehalcopyrtte, .45 .1 3.9 .01 N-pyrite.1.2 Quartz vein; hematite, chrysocolla. .02 --- 1.2 . . . . . .1.0 Quartz vein; hematite, azurtte, chalcopyrtte. .03 .2 2.9 --- .01• 9 quartz vein; hematite, chrysocolla, pyrite. .18 .4 4.7 .03 .011.5 quartz vein, breccia; azurite, chalcopyrlte, .11 --- 2.1 .02 .01hematite.1.0 quartz vein; hematite, chrysocolla, pyrite, .46 .3 3.9 .01 --hematite.2.0 Diorite; quartz, bornite, chalcopyrtte, .73 .3 3.2chrysoeolla, hematite, azurfte.2.1 Quartz vein, breccia; hematite, bo~nite, .10 .2 6.0chalcopyrlte.1.8 Diorite; chrysocolla, hematite, malachite. .01 .1 .34 -~1.8 quartz breccia; hematite, azurl~e, chalcopyrlte. .63 .1 .72 .0I.02 V.02 V.02 V).O2 Li.03 V.Figure ll.--Map of and adlt in the Blue Tank Canyon mineralized area showing sample localities 177-189.

,.. ~:~%.,~,~, .., ~, _ ;,,. ,..,. O RO 40 FEET~oad i , , , Ii % ...~i_I'.,~'~_ - ,~,, ,>..-~I,~ " ~ ~ cross sectionI "~ below~,; -:,-,,. ,~ranlte gneiss i "~,;,,,;,,:.; :~.v~ ; ..... ~ ~ '.-~__~"V..,-'J.,~ ;~ "At:,,;;' ;,,.I ""~:!ii''-~'~'''~''~ .... -" ~-~":'Y',--L~-~, "~,~. ~,i " ~ ~ ~ . . . 0 ' / ' ~ ,'--.:.m.~-,~-..~ ~,. -• ". ".t','~,,.- I ,";,'.I'-.',.'~;,:-. ',..~,~,,. ~191 " ~ ; ' Z ~ _ ~ ~ ~ ~; ;V~:,~'~'-:-~ ....~'.L~o,~-~.^~i,~,c~;,,, ~'~-I!i,.~ v.,"':-..",,,~ I .. • .-. . . -~:.. ,'.fg'l![;n\~I "".'~'"'"-" . . . .--, ...~.~&,,.:,:-,"-."-~'-Z,~A'-' .-,,.-7,Cross section sketch "'" ...... ""';"sampleAna1¥tlcal data• Lenzth of chip Au A~ Cu Pb Zn OtherII#o. (rE) Description ozlton percent90 5.0 Altered diorite; hematite, ch~socolla. 0.07 --- 0.34 --- --91 2.0 2.0-ft-thick quartz veln; hematite, ch~socolla. .04 0.4 5.0 --- --192 3.0 Quartz; altered gabbro; hematite. .01 .3 .11 -- --0.05 Lt.01 SrFiture 12.--Map of a bulldozer trench in the Blue Tank Canyon mlneralizedarea showin$ sample localities 190-192.60

IIIIIIIIIII|III,199197-N-I0 20 FEET' I = ISampleAnalytical dataLonsth of chip Au AR Cu Pb 2 n OtherUo. (ft) Description oz/ton percent195 0.5 0.5-ft-thLck quartz vein; hematLte, chrysocoLla, --- 0.3 0.93calcite.196 .5 do. --- .1197 2.0 Altered 8canUte; calcite, quartz, humatLto. 0,06 .2198 .5 0.5-ft-thlck quartz vein; hematite, chrFsocolla, .01 .2calcite.199 3.0200 .5OLorite; hematite, epLdote. .03 .20.5-ft-thick quartz vein; hematite, calcite. Tr .2------ .--.30 . . . . . ..02 . . . . . .,63 . . . . . . 0.01 [,[.03x . . . . . . .02 Sr.02 . . . . . .Figure 13.--Map of an adit in the Blue Tank Canyon mineralized areashowing sample localities 195-2-0.61

IIA0 20 4O FEETI t I I !/r. t.. v L---,..__ _ I- A L r ~(?V w/-'" ?V w/-'"t- Granite .L./p~w L m_7 ,Gra nl.'te,"II. JL201202/2O5SampleAnalytical dataLensth of chipAu AK .Cu Pb Zn(ft) Description ozlton percentOther5.0.72.0Altered diorite dike; quartz, hematite. Tr 0.2 0.1, --- -- 0.02 Sr0.7-£t-thick quartz vein; chrysocolla, hematite. -- .I 3.3 0.08 0.02Altered diorite; quartz, chr~socolla, hematite, 0.02 --- 1.2 . . . .calcite.Figure 14.--Map of a bulldozer trench in the Blue Tank Canyon mineralizedarea showing sample localities 201-20362

i!ii ~ :!i~!i!~ m m m m m R m m m m m m m l m m m m mTable 11.--Data for s~mples from the Blue Tank stet area that are not shown on fiRures.~o.TypeLength(~t)SampleDescriptionAu A~oz/tonAnalytical dataCu Pb Zn Otherpercent174 Select xxxVein quartz, chrysocolla, azurite, hematite.0.77 0.23.3 0.01 0.01193 Chip 1.0Fault strikes N. 8 ° W., dips 48 ° E.; gouge,hematite, chlorite, calcite..03194 do. 2.0Gneiss; quartz, calcite, hematite, chlorite.bJ;~III:I~C ~;iiii~ii~¸

m n m m n m n m m n m m m m mm m m m mDiorite dike around veinv23. ~lOOft~I >Granite , . av :~ 4.P .~, I ~' L~ ¢.-N oF~'II¢=t~)231 ~ 2 < •t ~p r,q230 1

• m m m m m m m m m mTable 12--Data for samples from the bulldozer trench on top of HarquahalaMountai n shown on Fisure 15A.NO.218219s. ,=~.ie. Analytlcal dataLength of chip Au A~ Cu Pb Zn Other(it) ...... Descriptlon . . . . . . . . . oz/ton ..... percent .1.5 Altered granite; quartz, hematite, azurite. 0.12 ......1.5 Altered granite; quartz pods, azurite, chlorite. Tr --- .3" ......2202212222232244.0 Diorite dike; hematite . . . . . . . .4* --- 0.01"1.5 Altered granite; quartz pods, hematite. Tr 0.2 .09" ......2.5 Altered granite; hematite . . . . . . . .3* 0.02* ---3.5 Altered granite; limonite. --- .4 .2* --- .---6.0 Gossan zone, strikes N. 35 ° W., dips 60 ° N.; 0.01 .4 .16 .16 ---hematite, limonlte.0.01 Li.04 V.02 Li.03 V2252262272282292302313.0 Diorite dike; hematite.--- .1 .136.0 Granite; quartz pods, stringers of diorite....... .01-1.5 Fractured quartz zone; limonite.Tr .1 .022.0 Gossan zone, strikes N. 18 ° N., dips 68 ° N;--- .4 .05hematite, limonite.1.5 Sillcious 8ossan zone; hematite, llmonlte..01 --- .344.0 Altered diorite dike; hematite....... .2*2.0 Quartz vein; hematite, limonite....... .15.01 ! .03 V.02 .02 r.i--- .01 Sr.02 V.02 Sr

m m u n m m m m m m n m m n m m m m mTable 12--Data for samples from the bulldozer trench on top of Harquahala Mountain shown on Figure 15A--ContinuedSampleAnalytical dataLength of chip Au A~ Cu Pb Zn OtherNo. (ft) Description oz/ton percent232 2,0 Quartz vein; hematite. Tr 0.I0 ......233 2.0 Quartz vein; hematite, gouge. Tr --- .06 ...... 0.02 V.02 Zr234 2,0 Altered diorite dike; hematite. - ..... .01" ......O~O~

i I m m m l m m m lNo.TypeTable 13.--Dat p fo r samples from the Harquahala ' Mountain mineval£zed area shown on Plate 1.SampleAnalytlcal dataLength Au J A~ Cu Pb Zn Other(feet) Description ...... oz/ton percent204 Chip0.5 0.5-rE-thick quartz vein, strikes N. 30 ° W., 2.15 --- 4.0* --- 0.04*dips 45 ° ~.; hematite, pyrite, chrysocolla.205 do. 4.0Diorite dike; hematite..01" --- .01"0.04 Li.02 Sr206 do. 2.5Altered gneiss; hematite, chrysocolla.Tr --- .12.07 Li207 Select xxxVein quartz; hematite, pyrite, malachite.Tr 0.1 .32.01 Li208 Chip 1.01.0-ft-thlck quartz vein, strikes N. 40" W.,dips 55 ° N.; hematite, malachite..06 --- .91q.2 L£0",209 do. 2.5Gossan zone, strikes N. 60 ° W., dips 80" N.;hematite, chrysocolla.Tr --- .18 0.02.01 V210 do. 5.0Altered granite gneiss; hematite.. . . . . . . 03*.02 Sr211 do. 3.5Altered diorite dike, strikes N. 30 ° W., dips60 ° N.; quartz, hematite, malachite..36 .1 .59.02 Sr212 do. .80.8-ft-thick quartz vein, strikes N. 29 ° W.,dips steeply; hematite, malachite.Tr .I .99.02 V213 do. .50.5-ft-thick quartz vein, strikes N. 35 ° W.,dips 60 ° N.; hematite, malachite..12 --- .27.01 V214 Select xxxVein quartz; hematite, pyrite, malachite..05 .3 2.0215 Chip 2.0Gneiss; hematite.--- .1 .07*216 do 6.0Altered diorite dike, strikes N. 34 ° W., dips48 ° N.; quartz rugs..61 .i --- .01 Sr

1 AD m i i i i m m m mTable 13.--Data for samples from the HarquahalaMountainminera!izedarea' shown,on, Plate l--ContinuedNo.TypeWidth(f~)Sample . . . . . . . . . . . .AnaSytiqa I dataAu A~ Cu Pb ZnDescription . ozltonD percentOther217 Select xxxVein quartz; hematite, pyrite, malachite. --- 0.12.3235 Chip 1.01.0-ft-thick quartz vein, strikes N. 28 ° W., Tr ---dips 62 ° N.; hematite, pyrite.. . . . . . . . . 0.03 Sn236 do. 3.0Altered granite gneiss; hematite. - .....--- .02 Sr237 do. 1.51.5-ft-thick quartz vein, strikes N. 40 ° W., Tr ---dips vertlcal; hematite, malachlte..39 .02 V238 do. 2.0Altered diorite; hematite• Tr ---.26co239 do. 3.0Diorite dike, strikes N. 36 ° W., dips 70 ° N.; 0.07 .3chlorlte, epldote.• 04*240 do. 2.0Granite; hematite, quartz, epidote. .02 .2.21241 do. 3.0Altered and fractured quartz vein, abundant 1.35 .4hematite, malachite..27242 do. 5.0Diorite dike, strikes H. 36 ° W., dips 70 ° N.; --- Trabundant hematite, quartz vu~s, malachite..83243 SelectS£1icified shear zone; quartz, hematite, .01 ---chalcopyrite.1.3 -J . . . . . .02 Y244 GrabGranite, diorite; hematite. Tr ---245 SelectVein quartz; pyrite, chalcopyrite, malachite, ......hematite.1.4246 Chip1.5Fault, strikes N. 35 ° W., dips 80 ° N.; gouge, ......hematite, malachite, quartz.1.2

Table 13--Data for samples from the Harquahala Mountalnminezallzed area shown on Plate 1--ContinuedNO.247, Sample AnalYtlcal dataLength Au A8 Cu Pb Zn OtherType (ft~ Description oz/ton .percentChip 0.7 Altered diorite dike, strikes N. 38 ° W., dlps ...... 0.26 ......vertical; hematite, epidote, malachite.248 do. 1.0 Fault, strikes N. 35 ° W., dips 46 ° N.; gouge, ...... .02* --- 0.01"hematite.249 do. 1.0 Fault, strikes ~. 15 ° W., dips 73 ° E.; gouge, --- 0.I .02* --- .01" 0.01Srhematite, epidote.250 do. 3.0 Silicified shear zone, hematite.C~251 Grab xxx Diorite; epidote. - . . . . . . . .252 Select xxx Vein quartz; pyrite, chrysocolla, calcite. Tr --- .90%m g m253 do. xxx Vein quartz; hematite. Tr .2 ---.03254 Chip 1.4 Diorite dike, strikes N. 40 ° W., dips 50 ° N.;epidote.255 do. 2.0 Diorite dike, strikes N. 20 ° W., dips 60 ° N.; --- .iepidote, hematite.256 do. 1.5 Fault, strikes N. 20 ° W., dips 60 ° N.; gneiss; . . . . i ....gouge, hematite.257 do. 3.5 Altered augen gneiss; pyrite, hematite.---258 do. 2.0 Fault, strikes N. 20 ° W., dips 60 ° N.; gneiss; Trhematite..01 Sr.05 Sr.01 Li.02 Sr.02 Sr.02 Li.01 Sr259 do. 2.0 Sheared quartz, strikes N. 45 ° W., dips vertical; Trhematite.

Im| i | | H | | i H | i | D | |i~i ¸~i!i ~ ,Table 13.--Data for samples from the Harquabala Mountain mineralized area shown on Plate 1--ContinuediNo.TypeSampleAnalytical dataLength Au A8 Cu Pb Zn Other(ft) Description oz/ton percent260 Chlp 3.0261 do. 3.0262 do. 4.0263 do. 5.0Augen gneiss; hematite, epidote, chlorite.Diorite dike, strikes N. 5 ° E., dips 49 ° E.;calcite, hematite.Altered dike, strikes N. 74 ° W., dips 54 ° N.;hematite•Silicious zone; hematite, limonite. Tr ---0.02 $1• 03 L:• 02 $1• 02 L!.05 V254 Select xxxVein quartz; pyrite,hematite, limonite.Tr0.10265 Chip 5.0Fractured granite;hematite, limonite.Tr?~i[iili~ ~'iii~!i/ili!

IIIIIIIIIIIIIIIIIII271-41,,272270S¢oped ~. I ^ It°t /surface >

- !!im R m ~ m m R m m n ~ [~l m m ~ B m m ~ iTable 14.--Data for samples from two adits in the Northwest stet area shown on Figure 16.No.SampleAnalytical dataLength of chip Au A8 Cu Pb Zn Other(ft)Description oz/ton percent2671.5Silicified fracture zone; hematite. 0.01 ---2681.5Silicified fracture zone; gouEe, hematite, .03 --- 0.46chrysocolla.2691.5do. .13 --- .442703.0Fracture zone; gouEe, hematite. Tr --- .060.1 Li2711.0Sillcified fracture zone; chrysocolla, malachite, .12 --- 12.4hematite."-42721.0Silicified fracture zone; hematite, chrysocolla. .01 --- .40q.03 L!~iiiiii'iii~ , ~ : i ¸¸

II Stoped 50f~ ~'~ ~,-~-~--- --~ ~..;A'~ ~ ~-~ .Caved beyond , "this point#o • .above sill "~,,.~.tr,-.;NN~.,'.-.I Stoped 35fl ~:., \~:See cross sect|onabove sill %~2~ _,,~'%~ske¢ch at right,%,:,.N,'.I,- L",;:~-';,.,..~ ~.'Stoped 25ft below sill" ~"~-~-;--~ ~ 292,|l,'~~S=lllevel293 /i ~ ~ -----------290S¢oped 20ft above sill .~_ ~!~,,~, -,~.~IIIIIIII.~ ~a89• ~~.Granite gneiss288286 28528:5,\Cross section° r" "Gra ni'l'e ~-. ~ ,:ske'fch281280;-~ • ~'/¢"

mm m u m m m m n ~ L I m u B m ~ ~Table 15--Data for samples from an adit in the North Sunset Canyon mineralized area shown on Fisure17.SampleAnalytical dataLength of chip Au Ag Cu Pb Zn OtherNo. (ft~ Description ozlton percent278 3.5 Schist; hematite. - . . . . . . . . . . . 0.02*279 3.5 Granite; hematite stains. - . . . . . . . . . . . . . .280 0.9 Diorite dike; epidote, hematite. - ..... 0.06* --- .01" 0.01 Sr281 0.5 Diorite dike; hematite. - ..... .03* --- .01" .02 Sr282 1.2 Fault gouge; epidote, hematite. - ..... .01 0.01 .01 .03 Sr283 1.5 Fault gouge; epidote. - . . . . . . . . . . . . . . .09 Srt284 4.0 Diorite dike; epidote, hematite. - . . . . . . . . . . . . 02* .06 SP285 3.0 do. - . . . . . . . . . . . . 02* .01 Li.05 Sr286 2.4 do. - . . . . . . . . . . . .01" .06 Sr287 0.7 Fault; gouge, altered diorite, hematite, limonite. - . . . . . . . . . . . . . . .02 Sr288 3.0 Granite gneiss; hematite staining. - .....289 0.5 Fault; gouge, epidote, hematite. ___i ___ .01 CP.03 Sr290 0.5 0.5-ft-thick quartz vein, azurite, chrysocolla, 0.28 0.1 3.9hematite.291 2.1 Altered diorite dike; quartz, hematite. .01 --- .07• 02 Li.04 Y• 01 Zr.01 Sr

mn iron n mu iml ml m m n m uml Imlnn iml | | S m |Table 15--Data for samples from an adit in the North Sunset Canyon mineralized area shown on Fisure 17--ContinuedNo °292SampleAnalytical dataLength of chip Au Ag Cu Ph Zn Other(ft) Description ozlton percent2.0 Silicious zone above quartz vein; hematite, 0.08 0.24limonite.2932.5 2.5-ft-thick quartz vein; hematite, chrysocolla, .53malachlte.1.72942951.0 Intersecting faults; gouse, hematite. - . . . . . . . .2.0 2.0-ft-thick quartz vein, hematite, malachite. .01 --- .03.02 Sr2962.8 Altered diorite dike; epidote, hematite, gouge. - . . . . . . 20• 03Srt.nj.... i[i;: i[:5:!][I~ iI!;:ii!l:i ] :

I ~!~ !i ~ i ~i ~• f'~: ,~I ~ j~;~ 301 from dump-N-I~,~,V~v;~,..P"' 7 >"~ "-.'~ ^ v2OOI ~ I40 FEETIII I, Cross section sketch I1,.309 from stockpile• ~,.~.~;~ - •+ ~%~,.,-~. •• ,~ ,,~'~ ~,I. Surface~'~- ; .^\~'~Irench level and~:-306 from stockpile 3 0 0 /I " ~ First levelII %~-~ < ~/ ^

m mm n m m m m m m m m m m m n m mmm m mTable 16.--Data for samples from North Sunset Canyon stet area shown on Fisure 18.Len$thNo. Type (it)SampleAnalytical dataAu A8 Cu Pb Zn OtherDescription oz/ton percent297 Chip 4.0298 Select xxxGranite epidoteVein quartz; hematite, chrysocolla, llmonite. 0.01 --- 0.24 ......0.04 Sr299 Chip 3.03.O-it-thick quartz vein, strikes N. 25* W.,dips 60 ° E.; azurite, hematite, epidote..01 --- .10300 do. 3.43.4-it-thick quartz vein, strikes N. 35 ° W.,dips 71 ° E.; hematite, epidote..01"--,I-.J301 Select xxxVein quartz; hematite epidote.Tr --- .03 ....... .01 Li.01 Sr302 Chip .70.5-ft-thlck quartz vein, strikes N. 34 ° W., .07 ---dips 56 ° E.; 0.2 ft fault gouge, hematite,.06303 do. i.i1.I-it-thick quartz vein, strikes N. 36 ° W., .01 ---dips 56 ° E.; hematite..04 .01 Sr304 do. 2.5Diorite dike, strikes N. 26 ° W., dips 54 ° E.;hematite, epidote.• 04 Sr305 do. 1.21.2-it-thick quartz vein, strikes N. 26 ° W., .01 ---dips 54°; hematite, limonite, epidote..04 ---306 Select xxxVein quartz; hematite, limonlte. .01 ---.03307 Chlp 3.53.5-it-thick quartz vein, strikes N. 44 ° W., Tr ---dips 57 ° E.; hematite, epidote..08. O1 Sr

m m m m m mm mmm m m mm m mm m m mm m m m mTable 16.--Data for samples from the North Sunset Canyon mineralized area shown on FiBure 18--ContinuedNo.308Typedo.SampleAnalytical dataLength Au A K Cu Pb Zn Other(ft) Description oz/ton percent3.0 Diorite dike, strikes N. 45 ° W., dips 55 ° E.; ...... 0.02* ...... 0.04 Srepidote.309310Select xxx Vein quartz; hematite, chrysocolla, llmonlte. 0.11 ---.67 ---Chip 2.0 2.0-ft-thick quartz vein, strikes N. 43 ° W., .......04 0.02*dips 60°; hematite, epidote..03 Li311 do. 1.0 l.O-ft-thick quartz vein, strikes N. 35 ° W., . . . . . . .02dips 55 ° E.; hematite."-.ICO

Ii!!II!IIIIIi!IiiI4 bb',~314i~j"!I,512~~'4 ~70 •I31840 FEETI7VI/..~,.,#'1dike;19.~ ,, :;,:~ 321a ~,'K."• 7 "Tr 31 ).2323 ~'~~.• "~ '.vJ~- -ak,,.nite526Diorite.-':~.:'.~.~II L Water filled3 2 8 ~ , - - w i n z eFigure 19.--Map of an adit in the North Sunset C~yon mineralized areashowing s~ple locallties 312-333.S32~2979

m m m IBU M n U R N ~ I~B M M m m M m Iml/Table l?--Data for samples from an adit in the North Sunset Canyon mineralized area shown on Figure 19.NO.312313314315316317318319320321322323324325326Sample Analytical dataLength of chip Au A~ Cu Pb Zn Other(it) Description oz/ton percent4.0 Shear zone; diorite, epldote, hematite, calcite. - . . . . . . . . . . . . . . 0.01Sr2.0 Shear zone; diorite, hematite, calcite. - . . . . . . . . . . . 0.03* .01Sr3.0 Unaltered granite; hematite. - . . . . . . . . . . . .02*1.0 Shear zone; diorite, hematite, limonite, chlorite. - . . . . . . . . . . . . . .1.0 Shear zone; diorite, hematite. - . . . . . 0.05 0.01 .02 .03 Sr1.0 do. --- 0.1 .02" .02* .05" .01 Li• .02 Sr4.0 do. - . . . . . . . . . . . . . . .01Sr1.0 do. - . . . . . .02* --- .01 .02 Sr4.0 do. - . . . . . .18 . . . . . . .02 Sr3.0 Fault gouge; epidote, chlorite, hematite. --- .03 Sr3.0 Fault gouge; granite; chlorite, hematite. .01 ...... .1Li.02 Sr4.0 Unaltered granite; epldote, hematite. - ..... .02 Sr3.0 Sheared granite; hematltet chlorlte, epldote.3.0 do. - ..... .02 Sr3.0 do. --- .1 .01Sr

m m m m m n n m i--_ m n m m m m m m m mTable 17--Data for samples from an adlt in the North Sunset Canyon minerallzedarea shown on Figure 19--ContinuedNo.SampleAnalytical dataLength of chip Au A8 Cu Pb Zn Other(ft) Description oz/ton percent3271.0 Altered granite; epldote, hematite. - ..... 0.01" ......0.1 Sr328.5 Altered diorite; hematite. 0.01 . . . . 2* --- 0.01"329.9 Unaltered diorite; epidote, hematite. --- 0.1 . . . . . . .01".05 Sr330.3 Contact between dike and gneiss; epldote, ...... .01 ......hematite..02 Sr3313.0 Unaltered gneiss; hematite. - . . . . . . . . . . . .01".05 Sr3322.5 Fault gouge; chlorite, hematite, limonlte. - . . . . . . . . . . . . . 04O03333.0 Unaltered gneiss; epldote, hematite. - . . . . . . . . . . . . . ..04 Sr

#i342•,;/ ~,~.~.~.:'i ' ,o 2o340- '~I ' '| ~ ~3~/.'~

m m m i | m m m m m m m i | | H m m mTable 18.--Data for ~-,~.les not shown on-other tables or figures.SampleAnalytical dataLength Au Ag Cu Pb Zn OtherNo. Type (it) Description ozlton percent57 chip 2.058 do. 2.0133 Chip 2.0Granite; hematite, quartz. 0.02 Tr . . . . . . . . -Schist; quartz, chlorite. Tr 0.3 0.10 --- 0.02Rhyolite breccia zone, strikes N. 25 ° E., dipunknown; abundant hematite..02 .02 5.0 Fe.37 Mn.03 Sr134 do. 5.0 Rhyolite; abundant hematite..05 4.8 Fe3.0~.2Stco135 do. 3.5 Rhyolite breccia zone, strikes N. 25 ° E., dipunknown; hematite, calcite.t.02* 4.2 Fe2.6 Mn.03 Sr163 do. 3.0 Diorite dike, strikes N. 30* W., dips 28 ° N.;.01" .01 Sr.02 VLengthNo. Type (£t)164 Grab xxx165 do. xxx166 do. x',oc266 do. xxxS~leDescriptionWhite marble.do.White marble, epidote, chlorite, biotite.White marble.Analytical dataAu Ag A!210_3 cacO 3 Mgc03 Sto2oz/tonpercent--- 0.2 0.05 92.8 0.~8 1.1 0.04. . . . 1 .08 88.6 1.0 .85 .09. . . . . . 1.4 76.7 .39 15.0 15.0. . . . 1 .07 89.4 .4 .95 .04

M i i i m i i M m BIU i i i i iBB i i BBB i ~Table 18.--Data for samples not shown on other tables or fiBures--ContinuedSample Analytical dataLength Au AR Cu Pb Zn OtherNo. Type (ft) Description oz/ton percent273 Grab xxx Massive barite; hematite. - ..... 0.01" --- 49.0 Ba.7 Sr274 do. xxx Brecciated barite, strikes N. 65* E., dips . . . . . . . . . . . . . . . 10.3 Ba24 ° N.; hematite. .I Sr275 Chip 2.4 2.4 ft quartz vein, strikes east, dips . . . . . . . . . . . . . . . .01 Srvertlcal; hematite.276 do. 1.0 3.0 ft quartz vein, strikes N. 75* E., dips Tr --- .01 --- .03 Li50 ° N.; hematite, diorite.277 do. 4.5 4.5 ft quartz vein, strikes east, dlps 45* N.; Tr . . . . . . . . . . . . .03 Lihematite, chlorite.334 do. 2.5 Diorite dike, strikes M. 42 ° W., dips 65 ° E..; . . . . . . . . . . . . . . . .01 Liepidote, hematite.335 do. 4.5 Fault, strikes N. 42 ° W., dips 65 ° E.; gouge, ...... .3* --- 0.03* .01 Lihematite, limonite, quartz.336 do. 1.8 Granite gneiss; hematlte, epldote, quartz. - ..... .1" ......)337 do. 1.0 Augen gneiss; hematite. - . . . . . . . . . . . . . ..01 Sr

IIIIo 220~60 .,,..__EXPLANATION OF SYMBOLS FOR FIGURES 3-20SAMPLE LOCALITY--Showlng sample numberFAULT--Showing strike and dlp and relative movement; dashed whereapproximateFAULT OR SHEAR ZONE--Showing strike and dip; dashed whereapproximate. 4VEIN--Showing strike and dip; dashed where approximateJOINT--Showing strike and dipIIIIIIIIII•0F7©DIKE--Showlng strike and dip; dashed where approximateCONTACT--Dashed where approximateFOLIATION--Showing strike and dipSHAFTINCLINED SHAFTFLOODED SHAFTDRIFT INTO FACING WALLDRIFT INTO REMOVED WALLCROSSCUT IN VERTICAL SECTIONCHUTE85

IIEXPLANATION OF SYMBOLS FOR FIGURES 3-20--ContinuedWINZEIIIIINCLINED WORKINGS--Showing degree of inclination; chevronspointing downPITOPEN CUTTRENCHPORTALSURFACE--In cross sectionLITHOLOGYDIORITE; DIORITE DIKEGABBROGNEISS'N!GRANITEGRANITE GNEISSSCHISTSKARN86

APPENDIX--Semiquantitative optical emission spectrographic analysisdetection limits. -U.S. Bureau of Mines, Reno Research Center.Detection limit- Detection limitElement (percent) Element (percent)Ag .002 Mo .0001AI .001 Na .3As .01 Nb .007Au .002 Ni .0005B .003 P .7Ba .002 Pb .001Be .0001 Pt .0001Bi .01 Re .0006Ca .05 Sb .06Cd .0005 Sc .0004Co .001 Si .0006Cr .0003 Sn .001Cu .0006 Sr .0001Fe .0006 Ta .02Ga .0002 Te .04K 2.0 Ti .03La .01 V .005Li .002 Zn .0001Mg .0001 Zr .003Mn .001 ¥ .0009These detection limits represent and ideal situation. In actual analyses, thedetection limits vary with the composition of the material analyzed. Thesenumbers are to be used only as a guide.87