California · Mariposa County
Past Producer

Mormon Bar District

Mariposa County, California, United States
Gold
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold
Commodity typeM
Deposit
Deposit typeStream placer
Model119: Placer Au-PGE
Orebody formIrregular
Ore controlMechanical accumulation within stream-channel lag gravels, bars, and point-bar deposits.
Materials
Ore mineralsGold
GangueQuartz
Geology
Host rockSand and Gravel
Economic & production
Development statusPast Producer
Discovery year1848
Identification
Deposit ID10310652
RegionNA
Data scoreB
Coordinates37.46483, -119.94983
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.Clark, W. B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 93.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.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.Krauskopf, K.B., 1985, Geologic map of the Mariposa quadrangle, Mariposa and Madera counties, California: U.S. Geological Survey Geologic Quadrangle Map GQ-1586, scale 1:62,500.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.Strand, R.G., 1967, Mariposa Sheet: California Division of Mines and Geology Geologic Map of California, scale 1:250,000.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.