Mine detail: North Fork

Previously called 'Weyerhaeuser Land Prospect'

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Location

Lat / long: 47.689, -121.662

Resource(M)

Primary: Copper
Ore: Bornite, Chalcopyrite, Pyrite, Pyrrhotite
Gangue: Magnetite
Orebody form: STOCKWORK

Production

Operation type: Unknown
Deposit type: Porphyry copper
Production size: None
Development status: Prospect

Geology

Host rock:Volcanic Rocks Of Mount Persis
Host type:Dacite
Associated rock:Snoqualmie Batholith
Associated type:Diorite
Structure:Fractures
Tectonic:Cascade Volcanic Arc
Alteration processes:Potassic, Argillic, Propylitic

References

MRDSMP00027
MAS530330991
DEP10048440
Reference{Deposit:: HOLLISTER, V.F., 1979, PORPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 32-33.}{Deposit:: Washington Division of Mines and Geology IC 48, 1973, P. 19.}{Geology:: TABOR, R.W., FRIZZELL, V.A., JR., BOOTH, D.B., WAITT, R.B., JR., WHETTEN, J.T., AND ZARTMAN, R.E., 1993, GEOLOGIC MAP OF THE SKYKOMISH RIVER 30- by 60-MINUTE QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATION SERIES MAP I-1963, SCALE 1:100,000.}
ReporterPeterson, Jocelyn A., Causey, J. Douglas