California · Stanislaus County
Producer

La Grange District

Stanislaus County, California, United States
GoldSilverPlatinum
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold
SecondarySilver, Platinum
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, Platinum
GangueQuartz
Geology
Host rockSand and Gravel · "Ione Formation", "Modesto Formation"
Economic & production
Development statusProducer
Discovery year1850
Identification
Deposit ID10310636
RegionNA
Data scoreB
Coordinates37.62782, -120.52958
References
Charles, A., 1947, Mines and mineral resources of Stanislaus County: California Journal of Mines and Geology, v. 43, no. 2, p. 92-94.Clark, W. B., 1970, Gold districts of California: California Divisions of Mines and Geology Bulletin 193, p. 85-86.Higgins, C.T. and Dupras, D.L., 1993, Mineral land classification of Stanislaus County, California: California Division of Mines and Geology Special Report 173, 174 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.Laizure, C.M., 1925, Stanislaus County: California State Mining Bureau 21st Report of the State Mineralogist, v. 21, no. 2, p. 200-222.Laizure, C.M., 1935, Current mining activities in the San Francisco District with special reference to gold: California Journal of Mines and Geology, v. 31, no. 1, p. 48.Marchand, D.E., Bartow, J.A. and Shipley, S., 1981, Preliminary geologic maps showing Cenozoic deposits of the Cooperstown and La Grange quadrangles, Stanislaus and Tuolumne Counties, California: U.S. Geological Survey Open-File Report 81-1049, scale 1:24,000.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.