Commodities
PrimaryChromium
TertiaryPlatinum, Palladium, Iridium, Ruthenium, Rhodium
Commodity typeM
Deposit
Model15: Podiform chromite (minor)
Deposit sizeS
Orebody formPODS
Ore controlMagmatic Segregation
Geology
Host rockDunite
Associated rockPeridotite · Bear Mountain Ophiolite
StructureShearing
Tectonic settingSierra Foothills Accreted Terrane
AlterationUltramafic Rocks Are Serpentinized
Economic & production
Development statusPast Producer
First production1918
Last production1918
Identification
Deposit ID10029666
MRDS IDM007350
RegionNA
Data scoreB
Coordinates38.56573, -120.93519
References
CATER, F.W., JR., RYNEARSON, G.A., AND DOW, D.H., 1951, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 3, CH. 4, P. 122-123, 164, PL. 8.CARLSON, C.A., AND OTHERS, 1985, ANALYSES FOR PLATINUM-GROUP ELEMENTS IN SAMPLES FROM PODIFORM CHROMITE DEPOSITS, CALIFORNIA AND OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-442, 14 P.CLARK, W.B., AND CARLSON, D.W., 1956, MINES AND MINERAL RESOURCES OF EL DORADO COUNTY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY V. 52, NO. 4, P. 465.LINDGREN, WALDEMAR, 1894, SACRAMENTO FOLIO, CALIFORNIA: U.S. GEOLOGICAL SURVEY GEOLOGIC ATLAS OF THE UNITED STATES, FOLIO 5, SCALE 1:125,000.BRADLEY, W.W., HUGUENIN, EMILE, LOGAN, C.A., TUCKER, W.B., AND WARING, C.A., 1918, MANGANESE AND CHROMIUM IN CALIFORNIA: CALIFORNIA STATE MINING BUREAU BULLETIN 76, P. 132.