The Unnamed is a silver, zinc, and 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 MRDS details
Site Name
Primary: Unnamed
Commodity
Primary: Silver
Primary: Zinc
Primary: Copper
Secondary: Iron
Secondary: Manganese
Location
State: Alaska
District: Yentna
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
Not available
Comments
Comment (Geology): Age = Late Cretaceous/early Tertiary; mineralization is interpreted to be linked to the Cascade pluton dated as 64.6 +/- 1.8 m.y. by K/Ar methods (Reed and Lanphere, 1972).
Comment (Reference): Primary Reference = Reed and others, 1978
Comment (Commodity): Ore Material = Unidentified sulfides
Comment (Deposit): Other Comments = This site is located within Denali National Park and Preserve.
Comment (Geology): Geologic Description = At this site Reed and others (1978) describe disseminated sulfide minerals (unidentified) within secondary hydrous iron- and manganese-oxide stained Mesozoic argillite and graywacke (KJs) cut by stringers of the Cascade pluton. The 64.6 m.y. Cascade pluton is one of the composite plutons (Tcp) mapped by Reed and Nelson (1980). They report copper and gold mineralization is indicated by stream sediment and pan concentrate samples from Cascade Creek, approximately one mile to the southeast from this site. Foley and others (1997) report mean values of 20 ppb gold, 1 ppb palladium, 42 ppb platinum, 139 ppm nickel, and 26 ppm copper from six rock samples of the Cascade pluton. Also see TL021.
Comment (Workings): Workings / Exploration = Reconnaissance mapping, stream silt, pan concentrate and rock sampling by the U.S. Geological Survey (Reed and others, 1978; Reed and Nelson, 1980) are all that have been described here. The Cascade pluton is one of the composite plutons (Tcp) mapped by Reed and Nelson (1980). They report copper and gold mineralization is indicated by stream sediment and pan concentrate samples from Cascade Creek, approximately one mile to the southeast from this site. Foley and others (1997) report mean values of 20 ppb gold, 1 ppb palladium, 42 ppb platinum, 139 ppm nickel, and 26 ppm copper from six rock samples of the Cascade pluton.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Reed, B.L., Nelson, S.W., Curtin, G.C., and Singer, D.A., 1978, Mineral resources map of the Talkeetna Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-870-D, 1 sheet, scale 1:250,000.
Reference (Deposit): Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, scale 1:250,000.
Reference (Deposit): Foley, J.Y., Light, T.D., Nelson, S.W., and Harris, R.A., 1997, Mineral occurrences associated with mafic-ultramafic and related alkaline complexes in Alaska: Economic Geology, Monograph 9, p. 396-449.
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