Commodities
PrimaryChromium
TertiaryIridium, Palladium, Platinum, Rhodium, Ruthenium
Commodity typeM
Deposit
Model15: Podiform chromite (minor)
Deposit sizeS
Orebody formSMALL HIGH-GRADE LENSES, DISSEMINATED
Ore controlMagmatic Segregation
Materials
Ore mineralsChromite
GangueOlivine, Serpentine
Geology
Host rockDunite
Associated rockPeridotite · Coast Range Ophiolite
StructureLocal Shearing
Tectonic settingCalifornia Coast Ranges
AlterationPeridotite Is Serpentinized
Economic & production
Development statusPast Producer
First production1916
Last production1944
Discovery year1915
Identification
Deposit ID10043532
MRDS IDM100312
Alternate namesPrincipal Claims: Rattlesnake, Slats, Yellow Streak. Prospects: Burl, Lone Bird, Parmeter Ranch, Red Slide, Serpentine.
RegionNA
Data scoreB
Coordinates38.6196, -123.13164
References
DOW, D.H., AND THAYER, T.P., 1946, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 2, CH. 1, P. 26-27, 36.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.DOW AND THAYER, 1946