Commodities
PrimaryCopper, Gold, Silver, Iron
Commodity typeM
Deposit
Deposit sizeS
Ore controlA Fracture Zone In Andesite 80-100 Feet Wide Contains Locally Distributed Copper And Minor Amounts Of Gold And Silver (Huntting, 1956, P. 63). Mineralization Occurs In Many Small Shears In Shattered Andesitic Pyroclastic Rocks That Are Cut By Several Plagioclase Porphyry Dikes.
Materials
Ore mineralsChalcocite, Chalcopyrite, Gold, Tetrahedrite
GangueBarite, Calcite, Hematite, Pyrite, Quartz
Geology
Host rockAndesite
Tectonic settingThe Andesite Of Isabella Ridge Was Deposited In An Island Arc Setting During The Cretaceous.
Economic & production
Development statusPast Producer
Identification
Deposit ID10104277
MRDS IDSP00209
RegionNA
Data scoreB
Coordinates48.75205, -120.30341
References
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.; WEIS, P.L.; TABOR, R.W.; ROBERTSON, J.F.; VAN NOY, R.M.; PATTEE, E.C.; HOLT, D.C., 1971, MINERAL RESOURCES OF THE PASAYTEN WILDERNESS AREA, WASHINGTON: U.S. GEOLOGICAL SURVEY BULLETIN 1325, 255 P., 3 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.WDGER OF 90-18