Description
C. Strong, D. O'Brien, C. Johnson
Commodities
PrimaryChromium
TertiaryPalladium, Iridium, Ruthenium, Rhodium, Platinum
Commodity typeM
Deposit
Model15: Podiform chromite (minor)
Deposit sizeS
WorkingsSurface/Underground
Orebody formPODS, LUMPS, BUNCHES, STRINGERS, DISSEMINATED
Ore controlMagmatic Segregation
Materials
Ore mineralsChromite
GangueOlivine, Uvarovite
Geology
Host rockDunite · Franciscan Formation
Associated rockPeridotite · Josephine Ophiolite
StructureMajor Shear Zone 6 Ft Wide Strikes N30w, Dips 30 Nw. Intense Shearing Throughout
Tectonic settingKlamath Mountains Accreted Terrane
AlterationTalc And Serpentine In Shear, Also Partial To Complete Serpentinization Of Peridotite And Dunite
Economic & production
Development statusPast Producer
First production1942
Last production1942
Discovery year1941
Identification
Deposit ID10088868
MRDS IDM700420
RegionNA
Data scoreB
Coordinates41.93232, -123.94644
References
STINSON, M.C., 1975, CALIFORNIA DIVISION OF MINES AND GEOLOGY MINERAL PROPERTY REPORT, UNPUB.WELLS, F.G., CATER, F.W., JR., AND RYNEARSON, G.A., 1946, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 1, CH. 1, P. 37.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.O'BRIEN, J.C., 1952, MINES AND MINERAL RESOURCES OF DEL NORTE COUNTY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY V. 48, NO. 4, P. 269.CATER, F.W., JR., AND WELLS, F.G., 1953, GEOLOGY AND MINERAL RESOURCES OF THE GASQUET QUADRANGLE, CALIFORNIA-OREGON: U.S. GEOLOGICAL SURVEY BULLETIN 995-C, PL. 11.