Mine detail: Original Mine

Previously called 'Original and Ferguson'

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Location

Lat / long: 37.66028, -119.85583

Resource(M)

Primary: Gold
Secondary: Lead, Silver, Copper
Tertiary: Zinc
Ore: Gold, Arsenopyrite, Pyrite, Galena, Sphalerite
Gangue: Quartz
Orebody form: Tabular
Discovery year: 1908

Production

Operation type: Underground
Deposit type: Hydrothermal vein
Development status: Past Producer

Geology

Host rock:Bass Lake Tonalite
Host type:Metamorphic Rock,Tonalite,Granodiorite
Structure:Calaveras-Shoo Fly Thrust
Tectonic:Magmatic arc
Alteration processes:None reported

References

DEP10310714
Reference{Deposit:: Bateman, P.C. and Krauskopf, K.B., Geologic map of the El Portal Quadrange, west-central Sierra Nevada, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-1998, scale 1:62,500.}{Deposit:: Bowen, O.E., Jr. and Gray, C.H., Jr., 1957, Mines and mineral resources of Mariposa County, California: California Journal of Mines and Geology, v. 53, nos. 1-2, p. 35-343.}{Deposit:: Castello, W.O., 1921, Mariposa County: California State Mining Bureau, 17th Annual Report of the State Mineralogist, p. 86-143.}{Deposit:: Clark, W. B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 37-38.}{Deposit:: Clark. W. B., and Lydon, P.A., 1962, Mines and mineral resources of Calaveras County, California: California Division of Mines and Geology County Report No. 2, p. 72-73.}{Deposit:: Earhart, R.L., 1988, Geologic setting of gold occurrences in the Big Canyon area, El Dorado County, California: U.S. Geological Survey Professional Paper 1576, 13 p.}{Deposit:: Julihn, C.E., and Horton, F.W., 1940, Mineral industries survey of the United States - Mines of the southern Mother Lode Region, Part II - Tuolumne and Mariposa counties: U.S. Bureau of Mines Bulletin 424, 179 p.}{Deposit:: Knopf, A., 1929, The Mother Lode system of California: U. S. Geological Survey Professional Paper 157, 88 p.}{Deposit:: 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.}{Deposit:: Logan, C.A., 1935, Mother Lode gold belt of California: California Division of Mines Bulletin 108, 240 p.}{Deposit:: 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.}{Deposit:: Strand, R.G., 1967, Mariposa Sheet: California Division of Mines and Geology Geologic Map of California, scale 1:250,000.}{Deposit:: Wagner, D.L., Bortugno, E.J., and McJunkin, R.D., 1990, Geologic map of the San Francisco-San Jose Quadrangle, California: California Department of Conservation, Division of Mines and Geology Regional Geologic Map Series, Map No. 5A, scale 1:250,000.}{Deposit:: Zimmerman, J.E., 1983, The geology and structural evolution of a portion of the Mother Lode Belt, Amador County, California: Unpublished M.S. thesis, University of Arizona, 138 p.}
ReporterSchruben, Paul G., Higgins, Chris T.