Commodities
PrimaryCopper
SecondarySilver, Gold
TertiaryBismuth
Commodity typeM
Deposit
Model78: Porphyry Cu-Au
Deposit sizeS
WorkingsUnderground
Orebody formSTOCKWORK, DISSEMINATED
Materials
Ore mineralsBornite, Chalcocite, Chalcopyrite, Gold, Pyrite
GangueQuartz
Geology
Host rockAndesite · Andesite Of Isabella Ridge;Andesite Of Isabella Ridge
Associated rockMafic Intrusive Rock
StructureSteeply Dipping Northwest-Trending Faults And Fractures. Eight Mile Creek Fault
Tectonic settingCascade Volcanic Arc
AlterationWidespread Hydrothermal Alteration
Economic & production
Development statusProducer
Production years1922, 1931, 1934, 1935
Identification
Deposit ID10107742
MRDS IDD001765
Alternate namesMount Beaver
RegionNA
Data scoreB
Coordinates48.79066, -120.32036
References
HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 144.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. 238.HOLLISTER, V.F., 1979, PROPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 34.GRANT, A.R., 1976, REPORT OF EVALUATION, MINERAL RESOURCE ANALYSIS STUDY ON UNITED STATES FOREST SERVICE LAND, STATE OF WASHINGTON: PREPARED FOR U.S. FOREST SERVICE - REGION 6, CONTRACT NO. 004724N, P. 32.STAATZ, M.H., WEIS, P.L., TABOR, R.W., ROBERTSON, J.F., VAN NOY, R.M., PATTEE, E.C., AND HOLT, D.C., 1971, MINERAL RESOURCES OF THE PASAYTEN WILDERNESS AREA, WASHINGTON: U.S. GEOLOGICAL SURVEY BULLETIN 1325, P. 114.