California · Sacramento County
Producer
Michigan Bar
Sacramento County, California, United States
Gold Platinum Iridium Osmium
Land & claims · BLM · live
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Surface manager + active mining claims at this point, live from BLM. The "open to location" notes are a general 1872-Mining-Law guide, not BLM output — decision-support only; verify with BLM MLRS and on the ground before staking or entry.
Commodities
PrimaryGold
SecondaryPlatinum
TertiaryIridium, Osmium
Commodity typeMetallic
Deposit
Deposit typeStream Placer
Model119: Placer Au-PGE
Deposit sizeSmall
Orebody formSTREAM SEDIMENT DEPOSITS
Ore controlStream Hydraulics
Materials
Ore mineralsGold
Geology
Host rockGravel · Ione Formation
Tectonic settingBase Of Sierra Nevada Foothills
Economic & production
Development statusProducer
Community notes
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References
LOGAN, C.A., 1919, PLATINUM AND ALLIED METALS IN CALIFORNIA: CALIFORNIA STATE MINING BUREAU BULLETIN 85, P. 30-31.CLARK, W.B., 1970, GOLD DISTRICTS OF CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY BULLETIN 193, P. 90.CLARK, W.B., 1970, PLATINUM: CALIFORNIA DIVISION OF MINES AND GEOLOGY MINERAL INFORMATION SERVICE, V. 23, NO. 6, P. 115-123.MERTIE, J.B., 1969, ECONOMIC GEOLOGY OF THE PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 94.CLARK, 1970
Identification
Deposit ID10038018
MRDS IDM045271
Alternate namesCosumnes River
RegionNA
Data scoreB
Coordinates38.49212, -121.09103
Base: USGS MRDS (public domain, frozen 2011). Community notes © their authors, CC-BY. Land data live from BLM.