The Unnamed (near Bush Mountain) is a copper, gold, and silver 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 (near Bush Mountain) MRDS details
Site Name
Primary: Unnamed (near Bush Mountain)
Commodity
Primary: Copper
Primary: Gold
Primary: Silver
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: Low-sulfide Au-quartz vein
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Pyritization of tuffaceous phyllite country rock.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrrhotite
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Karl, 1992
Comment (Workings): Workings / Exploration = Samples of green phyllite containing disseminations and veins of sulfide minerals assayed up to 0.1 ppm Au, 3 ppm Ag, and 1000 ppm Cu.
Comment (Geology): Age = Probably Late Cretaceous or younger.
Comment (Deposit): Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Comment (Geology): Geologic Description = The country rocks in the area of this site are Upper Jurassic or Cretaceous flyschlike metasedimentary rocks that are gradationally interbedded with andesitic or basaltic metatuff (Berg, 1972 [I 684]; Berg and others, 1988; Karl, 1992). The rocks were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. The occurrence consist of green tuffaceous phyllite and gray argillaceous phyllite that contain disseminated pyrite, and of quartz-pyrite veins (Karl, 1992, loc. 6). The pyrite also coats fractures in the country rocks. Locally, the pyrite is accompanied by pyrrhotite. Samples of green phyllite containing disseminations and veins of sulfide minerals assayed up to 0.1 ppm Au, 3 ppm Ag, and 1000 ppm Cu.
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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