Commodities
PrimaryChromium
Commodity typeM
Deposit
Model15: Podiform chromite (minor)
Deposit sizeS
Orebody formLENSES AND PODS
Ore controlMagmatic Segregation
Materials
Ore mineralsChromite
GangueAnthophyllite, Clinochlore, Magnetite, Olivine, Prehnite, Pyroxene, Serpentine, Staurolite, Tourmaline
Geology
Host rockDunite · Twin Sisters Dunite
Tectonic settingCascade Volcanic Arc
AlterationDunite Is Serpentinized
Economic & production
Development statusPast Producer
Identification
Deposit ID10048535
MRDS IDMP00127
Alternate namesWashington Chrome
RegionNA
Data scoreB
Coordinates48.71537, -121.95568
References
DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1990, METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 566.HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 42.HUNTTING, 1956