Commodities
PrimaryGold
SecondaryPlatinum, Silver
TertiaryDiamond
Commodity typeB
Deposit
Deposit typeStream Placer
Model119: Placer Au-PGE
Orebody formIrregular
Ore controlMechanical accumulation on irregular bedrock riffles and within river- and stream-channel lag gravels, bars, and point bar deposits
Materials
Ore mineralsGold
GangueQuartz, Garnet, Magnetite, Ilmenite, Zircon, Pyrite, Amphibole, Epidote, Chlorite, Siderite
Geology
Host rockSand and Gravel
StructureBig Bend-Wolf Creek Fault Zone
Tectonic settingMagmatic arc
Economic & production
Development statusPast Producer
Discovery year1850
Identification
Deposit ID10310616
RegionNA
Data scoreA
Coordinates39.30388, -121.15224
References
Clark, W.B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 50.Lindgren, W., 1895, Smartsville Folio, California: U.S. Geological Survey Atlas of the U.S., Folio 18, 6 p.Lindgren, W., 1911, Tertiary gravels of the Sierra Nevada: U.S. Geological Survey Professional Paper 73, p. 123-125.MacBoyle, E., 1919, Nevada County, French Corral mining district: California State Mining Bureau Report 16, p. 7-11.Saucedo, G. J. and Wagner, D. L., 1992, Geologic map of the Chico Quadrangle: California Division of Mines and Geology Regional Map Series Map No. 7A, scale 1:250,000.Yeend, W.E., 1974, Gold-bearing gravel of the ancestral Yuba River, Sierra Nevada, California: U.S. Geological Survey Professional Paper 772, 44 p.Additional information on the French Corral District is contained in File Nos. 331-9402 and 330-6679 (CGS Mineral Resources Files, Sacramanto).