Mine detail: Mountain Beaver

Previously called 'Mount Beaver'

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Location

Lat / long: 48.79066, -120.32036

Resource(M)

Primary: Copper
Secondary: Gold, Silver
Tertiary: Bismuth
Ore: Bornite, Chalcocite, Chalcopyrite, Gold, Pyrite
Gangue: Quartz
Orebody form: STOCKWORK, DISSEMINATED

Production

Operation type: Unknown
Production size: Small
Development status: Producer
Production years: 1922, 1931, 1934, 1935

Geology

Host rock:Andesite Of Isabella Ridge;Andesite Of Isabella Ridge
Host type:Andesite
Associated type:Mafic Intrusive Rock
Structure:Steeply Dipping Northwest-Trending Faults And Fractures. Eight Mile Creek Fault
Tectonic:Cascade Volcanic Arc
Alteration processes:Widespread Hydrothermal Alteration

References

MRDSD001765
DEP10107742
Reference{Deposit:: HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 144.}{Deposit:: 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.}{Deposit:: HOLLISTER, V.F., 1979, PROPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 34.}{Deposit:: 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.}{Deposit:: 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.}
ReporterMiller, M. H., Peterson, Jocelyn A.