Commodities
PrimaryGold
SecondaryPlatinum, Silver
Commodity typeM
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, Magnetite, Ilmenite, Zircon, Pyrite, Amphibole, Epidote, Chlorite, Siderite
Geology
Host rockSand and Gravel
StructureWolf Creek Fault Zone, Ramshorn Fault, Melones Fault Zone
Tectonic settingMagmatic arc
Economic & production
Development statusPast Producer
Discovery year1850
Identification
Deposit ID10310592
RegionNA
Data scoreB
Coordinates39.30759, -120.96803
References
Clark, W.B., 1970, Gold districts of California: California Division of Mines and Geology Bulletin 193, p. 31Jarman, A, 1927, Sailor Flat and Blue Tent: California Mining Bureau Report 23, p. 110-111.Lindgren, W., 1900, Colfax folio: U.S. Geological Survey Atlas of the U.S., folio 66, 10 p.Lindgren, W., 1911, Tertiary gravels of the Sierra Nevada: U.S. Geological Survey Professional Paper 73, p. 143.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.