The Unnamed (near Scidmore Glacier) 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 (near Scidmore Glacier) MRDS details
Site Name
Primary: Unnamed (near Scidmore Glacier)
Commodity
Primary: Copper
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
Comments
Comment (Geology): Geologic Description = The area is underlain by mixed schist, phyllite, and marble of Paleozoic age within a terrane intruded by granitic rocks of Cretaceous age (Brew and others, 1978, pl. 1A). In the area of the mineral occurrence, two conspicuously iron-stained zones as much as 25 feet thick cut tightly folded metasedimentary rocks, mostly marble. Pyrite-bearing quartz veins 1-2 feet in thickness locally cut the iron-stained zones. Chalcopyrite is present locally; a float sample of quartz vein contained 1000 ppm copper, and a 15-foot chip sample of a sulfidized zone contained 300 ppm copper and 7 percent iron; gold and silver were not detected.
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Probably Cretaceous, related to the intrusion of granitic rocks.
Comment (Deposit): Model Name = Low-sulfide quartz vein and disseminated sulfides in altered rock.
Comment (Workings): Workings / Exploration = Surface exposures only; an iron stained zone 15 feet thick contained 300 ppm copper; a quartz vein (float) contained 1000 ppm copper (MacKevett and others, 1971, table 9).
Comment (Deposit): Other Comments = Mineralization related to Cretaceous granitic event. The area is in Glacier Bay National Park and Preserve.
Comment (Reference): Primary Reference = MacKevett and others, 1971
References
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): 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.
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