Nevada Bureau of Mines and Geology - University of Nevada, Reno

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trending cuts and trenches spread out over about 118 to 114 mile. There were about 7-10 of these cuts. Geology consists of a mixture of volcanic rocks of basically andesitic composition but containing much glassy material and a fair amount of rhyolitic material. Opaline silica coats fractures in these rocks and the cinnabar, what little was seen, is associated with this opaline silica. There has been no activity here for some time. There has been no recorded production from the property but it appears that a few flasks of mercury have been produced, less than lo(?). SELECTED REFERENCES Bailey, E. H., and Phoenix, D. A. (1944) Quicksilver deposits in Nevada: NBMG Bull. 41, p. 100. Garside, L. J. (1973) Radioactive mineral occurrences in Nevada: NBMG Bull. 81, p. 58. Vanderburg, W. 0. (1936) Placer mining in Nevada: NBMG Bull. 27, p. 93. Willden, R. (1964) Geology and mineral deposits of Humboldt County, Nevada: NBMG Bull. 59, 154 p. Disaster District - 3
LOCATION DONNELLY DISTRICT The Donnelly district is located approximately nine miles north-northeast of the southwest corner of Humboldt County on the west slope of the Calico Mountains, southwest of Donnelly Peak. This places the district on the Division Peak 7 1/2 minute topographic map. The best access to the district is through Gerlach, past Leadville where a road takes off to the east. Running this route brings the traveler into the district from the north. HISTORY Quoting from Lincoln on the early history of the district: "The Donnelly mine was discovered in 1910 by James Raser. He shipped a little high-grade gold ore and in 1911 built a 5-stamp mill, which is credited with a production of $90,000 in gold bullion. The property was operated up to 1914. In 1919, the mine was operated by lessees. The Reeder mine to the south is said to have made a small production with the aid of an arrastra." According to Vanderburg, gold was discovered in 1907 by a cowboy who located several claims and later sold them to James Raser. When Vanderburg visited the district in 1937 there was no activity. Nothing is known about activity in the district since Vanderburg's visit. When visited during the current study there was no activity and hadn't been for some years. GEOLOGIC SETTING According to Willden there is a Late Cretaceous, Early Tertiary granodiorite intrusive which cover approximately 1/2 to 3/4 square mile on the west flank of Donnelly Peak. This intrusive is bounded on the west by a high angle fault. West of this fault, and covering the valley floor, Wilden has mapped Quaternary alluvium. On the south and southeast edge of the intrusive is a very small cropping of an un-named formation of Triassic-Jurassic age composed of phyllite, slate, and fine-grained quartzite. Wilden shows this unit being bounded on its south side by a fault. Surrounding all of the above units, and covering several square miles is an undivided sequence of Tertiary volcanic and sedimentary rocks. ORE DEPOSITS According to Vanderburg, "The ore occurs as lenses in narrow veins in granodiorite intruded into slate and quartzite. The principal veins strike northwest and southeast, dipping 30' northeast, and they vary in width from a few inches to a maximum of 2 1/2 feet. The gangue is chiefly iron-stained quartz. The gold is disseminated through the quartz in fine particles associated with a small amount of silver." This same setting was observed during the current visit but in addition to heavy iron-staining a fair amount of pyrite was observed on dump material. Donnelly District - 1
Page 1 and 2: UNIVERSITY OF NEVADA RENO NBMG OPEN
Page 3 and 4: Summary of Work Performed Index Map
Page 5 and 6: ) CRIB forms containing location an
Page 7 and 8: - /-\- /- County Line SONOMA-GER LA
Page 9 and 10: ORE DEPOSITS At the Nevada-Superior
Page 11 and 12: LOCATION ANTELOPE SPRINGS DISTRICT
Page 13 and 14: LOCATION ARABIA DISTRICT The Arabia
Page 15 and 16: LOCATION AWAKENING DISTRICT The Awa
Page 17 and 18: Johnson, M. G. (1973) Placer gold d
Page 19 and 20: ORE DEPOSITS The lode deposits at t
Page 21 and 22: Needham, A. B. and Trengrove, R. R.
Page 23 and 24: (Bailey and Phoenix, 1944), and flu
Page 25 and 26: ORE DEPOSITS Only two areas of mine
Page 27 and 28: LOCATION BOTTLE CREEK DISTRICT The
Page 29 and 30: the sheared rhyolite. Workings are
Page 31 and 32: quartz monzonite intrude the Havall
Page 33 and 34: Something less than 1/2 mile south-
Page 35 and 36: LOCATION DEEPHOLE DISTRICT The Deep
Page 37 and 38: adit driven into the pendant(?). If
Page 39 and 40: GEOCHEMICAL RELATIONSHIPS Gold was
Page 41: displacement in excess of 2,000 fee
Page 45 and 46: LOCATION DUTCH FLAT DISTRICT For th
Page 47 and 48: SELECTED REFERENCES Bailey, E. H. a
Page 49 and 50: ORE DEPOSITS Most of the mineraliza
Page 51 and 52: shale with lesser carbonaceous lime
Page 53 and 54: Crone, W. R. (1982) The use of Fe/M
Page 55 and 56: mercury mines are of the opalite ty
Page 57 and 58: LOCATION GOLD RUN DISTRICT The Gold
Page 59 and 60: SELECTED REFERENCES Couch, B. F. an
Page 61 and 62: At the Gayer-Moo property, very spa
Page 63 and 64: Mineralization in the district appe
Page 65 and 66: and dip steeply to the vest. .... A
Page 67 and 68: LOCATION IMLAY DISTRICT The Imlay d
Page 69 and 70: apparently did not contain cinnabar
Page 71 and 72: LOCATION INDIAN DISTRICT The Indian
Page 73 and 74: LOCATION IRON HAT DISTRICT The Iron
Page 75 and 76: Southern Pacific Co. (1964) Mineral
Page 77 and 78: silver per ton and a trace gold. Ho
Page 79 and 80: LOCATION JACKSON MOUNTAINS DISTRICT
Page 81 and 82: SELECTED REFERENCES Lincoln, F. C.
Page 83 and 84: of manganese oxides occur in rocks
Page 85 and 86: andesitic volcanic rocks that have
Page 87 and 88: LOCATION JUNCO AREA For the purpose
Page 89 and 90: LOCATION JUNIPER RANGE DISTRICT The
Page 91 and 92: LOCATION KENNEDY DISTRICT The Kenne
Page 93 and 94:
Borlaasca Mines are along the main
Page 95 and 96:
LOCATION LkKE DISTRICT The Lake dis
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Willden, R., and Speed, R. C. (1974
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Northwest of Leadville, approximate
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LOCATION LEONARD CREEK DISTRICT The
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from 3.8 to 140 ppm gold. Silver va
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ORE DEPOSITS The mineral deposits a
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LOCATION MILL CITY (CENTRAL) MINING
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present, and all samples showed det
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GEOCHEMISTRY In addition to iron th
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ORE DEPOSITS The mercury deposits a
Page 115 and 116:
Papke, K. G. (1979) Fluorspar in Ne
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SELECTED REFERENCES Johnson, M. G.
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minor amounts of tremolite, pyrrhot
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LOCATION OPALITE (CORDERO) DISTRICT
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McKee, E. 8. (1976) Origin of the M
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LOCATION POTOSI MINING DISTRICT The
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has been mined from two localities
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LOCATION POVERTY PEAK DISTRICT The
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In 1954 Sonoma Mines, Inc. acquired
Page 133 and 134:
LOCATION RABBIT HOLE DISTRICT The R
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LOCATION RAGGED TOP DISTRICT The Ra
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Vanderburg, W. 0. (1936) Reconnaiss
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quartz is commonly crushed and occu
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In the south-southwest portion of t
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district, the silver-bearing quartz
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LOCATION ROSEBUD DISTRICT The Roseb
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LOCATION ROSE CREEK DISTRICT The Ro
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LOCATION RYE PATCH DISTRICT The Rye
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LOCATION SAN EMIDIO DESERT - LAKE R
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"cabin" a few hundred feet. It tren
Page 155 and 156:
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LOCATION SCOSSA DISTRICT The Scossa
Page 159 and 160:
LOCATION SEVEN TROUGHS DISTRICT The
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tin, and one contained high molybde
Page 163 and 164:
SELECTED WFERENCES Stager, H. K. (i
Page 165 and 166:
LOCATION SIERRA DISTRICT The Sierra
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Jones, R. B. (1984) Directory of Ne
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of the old Spring City tovnsite. Th
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LOCATION SPRING VALLEY DISTRICT The
Page 173 and 174:
LOCATION STAGGS DISTRICT The Staggs
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LOCATION STAR DISTRICT The Star dis
Page 177 and 178:
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of Tertiary sedimentary rocks, alth
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LOCATION TABLE MOUNTAIN DISTRICT Th
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There are two fluorspar properties
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Wallace, R. E., Silberling, N. J.,
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thrust fault separates two of these
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LOCATION TOBIN ANTI SONOMA RANGE MI
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SELECTED REFERENCES Bailey, E. H.,
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ORE DEPOSITS The tungsten deposits
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LOCATION TREGO HOT SPRINGS AREA The
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SELECTED REFERENCES Kerr, P. F. (19
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APPENDIX A
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Sample Number 492 495 Sample Descri
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Sample Number Location Sample Descr
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Sample Number 1490 Location Sample
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Sample Number Location Quad: Sulphu
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Sample Description Sample Number Lo
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Sample Number 2258 I Sample Descrip
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Sample Number Sample Description Se
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Sample Number 2319 2320 2321 2322 2
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Sample Number 2337 2340 2341 2342 2
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Sample Number 2358 2359 I I Quad Ad
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Sample Number Lccation Sample Descr
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Sample Number 2411 I UTM Sample Des
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Sample Number quad: p~ Location Don
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Sample Number Sample Description Qu
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Sample Description Sample Number 1
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Sample Number sac 2 - 31N -. R -~ 3
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Sample Number 2554 2558 2559 25hn Q
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Sample Number 2572 Location . Sampl
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Sample Number 2589 25!xL-. I Locati
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Sample Description Sample Number Lo
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Sample Number Location Quad: Sec: S
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- aJ c U .r( -d aJ L > aJ Y -4-4 M
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Sample Number 2h70 2672 Location Sa
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Sample Number Location auaa: L_ovel
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Sample Number 2719 L/ZO 2721 I uTM
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Sample Number Location I 2801 I Qua
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Sample Number 2824 2827 Location cu
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Sample Number Location Quad 3-aes t
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Sample Number 2904 2905 I Sample De
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Sample Number Location Quad: Fox Ru
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Sample Number 2937 2939 --z%42- Loc
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Sample Number 2951 Location Sample
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Sample Number 2966 2967 Location Qu
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Sample Number 2982 1 aul Railroad P
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Sample Description I I Sample Numbe
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Element Semi-Quantitative Spectrogr
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Element Semi-Quantitative Spectrogr
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Element Fe % (.05) Mg % (.02) Ca %
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- , Semi-Quantitative Spectrographi
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1 ' I Element Fe % ( 05) Mg % ( 02)
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Element Fe % ( 05) Mg % ( 02) Ca %
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. Semi-Quantitative Spectrographic
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ilement r05) "' rO2) ca "5) Ti b02)
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, Semi-Quantitative Spectrographic
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Element Fe % (.05) Mg % (.02) Ca %
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! Element Fe % (.05) Mg % (.02) - C
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Semi-Quantitative Spectrographic An
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'"05) " "2) 'a r05) Ti i!O02) hl n
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- Semi-Quantitative Spectrographic
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. Semi-Quantitative Spectrographic
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Element Sr (100) i v 1 (1 01 W (50)
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Nevada Bureau of Mines and Geology - University of Nevada, Reno

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