Commodities
PrimaryGold, Copper, Silver, Bismuth
Commodity typeM
Deposit
Deposit sizeS
Ore controlAndesite Tuff And Brecci Generally Strike N30w And Dip 70w To Vertical. A Plagioclase Porphyry Dike Or Sill Is Discontinously Exposed Along The West Edge Of The Billy Goat Property. Pyrite And Copper Minerals Occur Locally In 0.25-2-In.-Wide Quartz Veinlets, Which Are Located Near Steeply Dipping, Northwest-Trending Faults And Fractures. The Veinlets Are Disseminated Through The Fractured And Layered Andesite And Plagioclase Porphyry (Staatz And Others, 1971, P. 111-112).
Materials
Ore mineralsBornite, Chalcocite, Chalcopyrite, Gold
Other materialsPyrite
Geology
Host rockAndesite
StructureThe Volcanics Were Deposited As Part Of An Island Arc.
Economic & production
Development statusPast Producer
Identification
Deposit ID10104288
MRDS IDSP00257
RegionNA
Data scoreB
Coordinates48.78622, -120.32091
References
DERKEY, R.E.; JOSEPH, N.L.; LASMANIS, R., 1990, METAL MINES OF WASHINGTON-PRELIMINARY REPORT: STATE OF WASHINGTON, DEPARTMENT OF NATURAL RESOURCES, DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, 577 P.HUNTTING, M. T., 1956, INVENTORY OF WASHINGTON MINERALS-PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, 428 P.; V. 2, 67 P.STAATZ, M.H.; TABOR, R.W.; WEIS, P.L.; ROBERTSON, J.F.; VAN NOY, R.M.; PATTEE, E.C., 1972, GEOLOGY AND MINERAL RESOURCES OF THE NORTHERN PART OF THE CASCADES NATIONAL PARK, WASHINGTON: U.S. GEOLOGICAL SURVEY BULLETIN 1359, 132 P., 2 PL.STOFFEL, K.L., MCGRODER, M.F., COMPILERS, 1990, GEOLOGIC MAP OF THE ROBINSON MOUNTAIN 1:100,000 QUADRANGLE, WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-5, 39 P., 1 PL.