Commodities
PrimaryChromium
TertiaryIridium, Palladium, Rhodium, Ruthenium, Platinum
Commodity typeM
Deposit
Model15: Podiform chromite (minor)
Deposit sizeS
WorkingsSurface/Underground
Orebody formDISSEMINATED, VEINLETS, STRINGERS, LENSES
Ore controlMagmatic Segregation
Materials
Ore mineralsChromite
GangueOlivine, Serpentine
Geology
Host rockDunite
Associated rockGabbro,Peridotite,Granite · Kings-Kaweah Ophiolite
StructureFault Offsets Ore Zone 10-15 Ft Between The Two Large Open Cuts. Ore Parallels Poorly Developed Schistosity In Serpentine
Tectonic settingSierra Foothills Accreted Terrane
AlterationUltramafic Rocks Serpentinized In Small Stringers And Lenses From 1 In. To Several Ft Thick
Economic & production
Development statusProducer
Identification
Deposit ID10109804
MRDS IDM700413
Alternate namesBlack Bear Mine, Rose Lease
RegionNA
Data scoreB
Coordinates36.86939, -119.28874
References
RYNEARSON, G.A., 1948, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 3, CH. 3, P. 95.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.LOGAN, C.A., BRAUN, L.T., AND VERNON, J.W., 1951, MINES AND MINERAL RESOURCES OF FRESNO COUNTY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY V. 47, NO. 3, P. 545, PL. 6.RYNEARSON, 1948