Mine detail: Michigan Bar

Previously called 'Cosumnes River'

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Location: Sacramento County, California, United States, North America
Lat / long: 38.49212, -121.09103
dep_id: 10038018
mrds_id: M045271
Commodity type: metallic
Major mineral: Gold
Minor mineral: Platinum
Trace mineral: Osmium, Iridium
Operation type: Unknown
Deposit type: Stream Placer
Production size: Small ammount of material produced
Development status: Producer
ore: Gold
orebody_fm: STREAM SEDIMENT DEPOSITS
model: 119: Placer Au-PGE
conc_proc: Entrapment By Irregularities In Stream Bed Or Deposition In Low-Energy Part Of Stream
ore_ctrl: Stream Hydraulics
Reporter: Blair, Will N., Peterson, Jocelyn A.
hrock_unit: Ione Formation
hrock_type: Gravel
tectonic: Base Of Sierra Nevada Foothills
References:
  • Deposit:: LOGAN, C.A., 1919, PLATINUM AND ALLIED METALS IN CALIFORNIA: CALIFORNIA STATE MINING BUREAU BULLETIN 85, P. 30-31.
  • Deposit:: CLARK, W.B., 1970, GOLD DISTRICTS OF CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY BULLETIN 193, P. 90.
  • Deposit:: CLARK, W.B., 1970, PLATINUM: CALIFORNIA DIVISION OF MINES AND GEOLOGY MINERAL INFORMATION SERVICE, V. 23, NO. 6, P. 115-123.
  • Deposit:: MERTIE, J.B., 1969, ECONOMIC GEOLOGY OF THE PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 94.
  • Production:: CLARK, 1970
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