Commodities
PrimaryChromium
TertiaryPlatinum
Commodity typeM
Deposit
Model15: Podiform chromite (minor)
Deposit sizeS
WorkingsSurface/Underground
Orebody formVEINLETS AND POCKETS, DISSEMINATED
Ore controlMagmatic Segregaton
Materials
Ore mineralsChromite
GangueSerpentine
Geology
Host rockDunite
Associated rockPeridotite · Fidalgo Complex
StructureSan Juan Thrust
Tectonic settingAccreted Terrane
AlterationDunite Has Been Serpentinized
Economic & production
Development statusPast Producer
First production1917
Last production1918
Identification
Deposit ID10047970
MRDS IDM700343
Alternate namesCypress Island
RegionNA
Data scoreB
Coordinates48.58202, -122.72265
References
HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 39.PARDEE, J.T., 1929, PLATINUM AND BLACK SAND IN WASHINGTON, IN CONTRIBUTIONS TO ECONOMIC GEOLOGY 1928: U.S. GEOLOGICAL SURVEY BULLETIN 805, P. 9-10.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. 333.HUNTTING, 1956