California · Nevada County
Past Producer

Mountaineer Mine

Nevada County, California, United States
SilverGold
⌖ Show on mapUSGS source ↗
Commodities
PrimarySilver, Gold
Deposit
Deposit typeHydrothermal vein
Model273: Low-sulfide Au-quartz vein
Orebody formTabular
Ore controlOre shoots in mesothermal quartz veins formed along fractures in the granodiorite country rock.
Materials
Ore mineralsGold, Pyrite, Sphalerite, Chalcopyrite, Galena
GangueQuartz
Geology
Host rockGranodiorite · Yuba Rivers Pluton
StructureWeimar Fault Zone
Tectonic settingMagmatic arc
AlterationThe wallrock (granodiorite) adjacent to the Mountaineer Vein is comparatively fresh.
Economic & production
Development statusPast Producer
Discovery year1880
Identification
Deposit ID10310711
RegionNA
Data scoreA
Coordinates39.25972, -121.03417
References
Clark, W.B., 1961, Mountaineer Mine: Unpublished Property Report, California Division of Mines, 1 p.Clark, W.B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 97-101.Crawford, J.J., 1894, Nevada County: Twelfth Annual Report of the State Mineralogist, California State Mining Bureau, p. 193-194.Crawford, J.J., 1896, Nevada County: Thirteenth Annual Report of the State Mineralogist, California State Mining Bureau, p. 254-255.Hobson, J.B. and Wiltsee, E.M., 1893, Nevada City Mining District: Eleventh Annual Report of the State Mineralogist, California State Mining Bureau, p. 287-288.Hobson, J.B., 1890, Nevada City Mining District: Tenth Annual Report of the State Mineralogist, California State Mining Bureau, p. 384-385.Johnston, W.G., Jr., 1938, Vein-filling at Nevada City, California: Geological Society of America Bulletin, v. 49, no. 1, p. 23-34.Johnston, W.G., Jr., 1940, The gold-quartz veins of Grass Valley, California: U.S. Geological Survey Professional Paper 194, 101 p.Koschmann, A.H., and Bergendahl, M.H., 1968, Principal gold-producing districts of the United States: U.S. Geological Survey Professional Paper 610, 283 p.Lindgren, W., 1896a, Geologic atlas of the United States - Nevada City Special Folio: U.S. Geological Survey Folio 29, 7 p..Lindgren, W., 1896b, Gold-quartz veins of Nevada City and Grass Valley: Seventeenth Annual Report of the U.S. Geological Survey, Part 2, p. 1-262MacBoyle, E.M., 1919, Mines and mineral resources of Nevada County: Sixteenth Annual Report of the State Mineralogist, California State Mining Bureau, p. 1-270.Saucedo, G.J. and Wagner, D.L., 1992, Geologic map of the Chico Quadrangle, California: California Department of Conservation, Division of Mines and Geology Regional Geologic Map Series, Map No. 7A, scale 1:250,000.Schweickert, R.A., Hanson, R.E., and Girty, G.H., 1999, Accretionary tectonics of the Western Sierra Nevada Metamorphic Belt in Wagner, D.L. and Graham, S.A., editors, Geologic field trips in northern California: California Division of Mines and Geology Special Publication 119, p. 33-79.Tuminas, A., 1983, Structural and stratigraphic relations in the Grass Valley-Colfax area of the northern Sierra Nevada, California: Ph.D. dissertation, University of California, Davis, 415 p.