California · Mariposa County
Past Producer

Mount Gaines Mine

Mariposa County, California, United States
GoldLeadCopperSilver
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold
SecondaryLead, Copper, Silver
Commodity typeM
Deposit
Deposit typeHydrothermal vein
Model273: Low-sulfide Au-quartz vein
Orebody formTabular
Ore controlOre shoots within quartz veins
Materials
Ore mineralsGold, Galena, Sphalerite, Chalcopyrite, Pyrite, Arsenopyrite, Barite, Proustite, Argentite
GangueQuartz
Geology
Host rockGreenstone,Slate · "Penon Blanco Volcanics", "Mariposa Formation"
StructureBear Mountains Fault Zone
AlterationReported, but not specified
Economic & production
Development statusPast Producer
Discovery year1868
Identification
Deposit ID10310653
Alternate namesBarfield, Frenchman, Bearfield
RegionNA
Data scoreB
Coordinates37.54117, -120.17428
References
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.Castello, W.O., 1921, Mariposa County: California State Mining Bureau, 17th Annual Report of the State Mineralogist, p. 86-143.Clark, W. B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 65-66.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.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.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.Knopf, A., 1929, The Mother Lode system of California: U. S. Geological Survey Professional Paper 157, 88 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.Logan, C.A., 1935, Mother Lode gold belt of California: California Division of Mines Bulletin 108, 240 p.Metals Economics Group, 1983, The MineSearch annual: California, Oregon, and Washington, vol. VIII, 636 p.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.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.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.