Mine detail: Fortress Mountain

Previously called ''

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Location

Lat / long: 48.17788, -120.9437

Resource(M)

Primary: Copper
Secondary: Molybdenum
Ore: Chalcocite, Chalcopyrite, Covellite, Malachite, Molybdenite, Pyrite, Pyrrhotite
Gangue: Chlorite, Epidote, Sericite
Orebody form: SMALL PLUGS

Production

Operation type: Unknown
Production size: None
Development status: Occurrence

Geology

Host rock:Cloudy Pass Pluton;Cloudy Pass Pluton
Host type:Quartz Monzonite
Tectonic:Cascade Volcanic Arc
Alteration processes:Sericitization, Potassic

References

MRDSMP00194
DEP10048596
Reference{Deposit:: GRANT, A.R., 1982, SUMMARY OF ECONOMIC GEOLOGY DATA FOR THE GLACIER PEAK WILDERNESS, CHELAN, SNOHOMISH, AND SKAGIT COUNTIES, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 82-408, P. 22-24.}{Deposit:: STOTELMEYER, R.B., JOHNSON, F.L., MCHUGH, E.L., FEDERSPIEL, F.E., DENTON, D.K., JR., AND STEBBINS, S.A., 1982, MINERAL INVESTIGATION OF THE GLACIER PEAK WILDERNESS AND ADACENT AREAS, CHELAN, SKAGIT, AND SNOHOMISH COUNTIES, WASHINGTON: U.S. BUREAU OF MINES OPEN-FILE REPORT 89-82, P. 22.}{Deposit:: CHURCH, S.E., FORD, A.B., FLANIGAN, V.J., AND STOTELMEYER, R.B., 1984, MINERAL RESOURCE POTENTIAL OF THE GLACIER PEAK WILDERNESS AND ADJACENT AREAS, CHELAN, SKAGIT, AND SNOHOMISH COUNTIES, WASHINGTON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-1652-A, SCALE 1:100,000.}{Deposit:: TABOR, R.W., BOOTH, D.B., VANCE, J.A., FORD, A.B., AND ORT, M.H., 1988, PRELIMINARY GEOLOGIC MAP OF THE SAUK RIVER 30 BY 60 MINUTE QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 88-692, SCALE 1:100,000.}
ReporterPeterson, Jocelyn A.