The Unnamed (south of Tidal Inlet) is a copper 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 Tidal Inlet) MRDS details
Site Name
Primary: Unnamed (south of Tidal Inlet)
Commodity
Primary: Copper
Secondary: Cobalt
Secondary: Nickel
Location
State: Alaska
District: Juneau
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
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrite
Ore: Pyrrhotite
Gangue: Calcite
Gangue: Quartz
Comments
Comment (Geology): Geologic Description = The site is mainly underlain by marble and argillite and graywacke of Silurian and Devonian age that are intruded by hornblende diorite of Cretaceous age (Brew and others, 1978). At the site, thin quartz veins in marble contain pyrite, pyrrhotite, and chalcopyrite. A representative sample collected by MacKevett and others (1971, p. 50) contained 1000 ppm copper and 300 ppm each of cobalt and nickel.
Comment (Exploration): Status = Inactive
Comment (Deposit): Model Name = Contact deposit in marble near quartz diorite. Sulfide veins in marble.
Comment (Deposit): Other Comments = Wright and Wright (1937) report claim activity (copper) at or near this location.? the site is in Glacier Bay National Park and Preserve.
Comment (Workings): Workings / Exploration = Representative surface sample of veins contained 1000 ppm copper, and 300 ppm each of cobalt and nickel (MacKevett and others, 1971). Trace of gold, no silver detected. Wright and Wright (1937) reported claims staked for copper at or near this locality.
Comment (Geology): Age = Probably Cretaceous.
Comment (Reference): Primary Reference = MacKevett and others, 1971
References
Reference (Deposit): Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Mount Fairweather quadrangle, AK: U.S. Geological Survey Miscellaneous Field Study Map MF-436, 1 sheet, scale 1:250,000.
Reference (Deposit): MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.
Reference (Deposit): Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.
Reference (Deposit): Wright, F.E. and Wright, C.W., 1937, The Glacier Bay National Monument in southeastern Alaska, its glaciers and geology: U.S. Geological Survey manuscript report, 224 p.
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