The Unnamed (south of Kwain Bay) is a copper and gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Unnamed (south of Kwain Bay) MRDS details
Site Name
Primary: Unnamed (south of Kwain Bay)
Commodity
Primary: Copper
Primary: Gold
Secondary: Lead
Secondary: Zinc
Location
State: Alaska
District: Ketchikan
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz
Comments
Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c)
Comment (Geology): Age = Fissure veins probably are Late Cretaceous or younger.
Comment (Geology): Geologic Description = The country rocks in the area of this site include undivided, metamorphosed Silurian and Ordovician volcanic, sedimentary, and intrusive rocks; Silurian trondhjemite that intrudes the Silurian and Ordovician assemblage; and recrystallized, Upper Triassic carbonate and clastic rocks, rhyolite, and basalt that unconformably overlie the Paleozoic rocks (Berg, 1972 [I 684]; Berg and others, 1988). The rocks were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. The occurrences consist of pyrite- and chalcopyrite-bearing quartz fissure veins in locally sheared, felsic to mafic metavolcanic and volcaniclastic rocks (Karl, 1992, loc. 37a-g). The presence of small amounts of galena and sphalerite is inferred from sample assays. The sulfides also occur as disseminations and seams in the volcaniclastic rocks. . A sample of pyrite[?] contained 100 ppm Pb, 300 ppm Zn, 300 ppm Cr, 200 ppm Ni, and 1000 ppm As; samples of various, sulfide-bearing country rocks contained up to 0.08 ppm Au, 2 ppm Ag, 1500 ppm Cu, 10 ppm Mo, 100 ppm Co, and 300 ppm Ni; samples of quartz veins contained up to 0.1 ppm Au, 2 ppm Ag, and 500 ppm Cu; and a soil survey conducted in the 1970s by private interests reportedly showed detectable gold (Karl, 1992, loc. 37a-g).
Comment (Workings): Workings / Exploration = A sample of pyrite[?] contained 100 ppm Pb, 300 ppm Zn, 300 ppm Cr, 200 ppm Ni, and 1000 ppm As; samples of various, sulfide-bearing country rocks contained up to 0.08 ppm Au, 2 ppm Ag, 1500 ppm Cu, 10 ppm Mo, 100 ppm Co, and 300 ppm Ni; samples of quartz veins contained up to 0.1 ppm Au, 2 ppm Ag, and 500 ppm Cu; and a soil survey conducted in the 1970s by private interests reportedly showed detectable gold (Karl, 1992, loc. 37a-g).
Comment (Reference): Primary Reference = Karl, 1992
References
Reference (Deposit): Karl, S.M., 1992, Map and table of mineral deposits on Annette Island, Alaska: U.S. Geological Survey Open-File Report 92-690, 57 p., 1 map, scale 1:63,360.
Reference (Deposit): Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.
Reference (Deposit): Berg, H.C., 1972, Geologic map of Annette Island, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-684, 8 p., 1 sheet, scale 1:63,360,
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