The Unnamed is a tungsten 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 MRDS details
Site Name
Primary: Unnamed
Commodity
Primary: Tungsten
Primary: Gold
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
Model Name: W veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Development of calc-silicate (skarn) mineral assemblage in country rocks (Reed and others, 1978).
Rocks
Role: Host
Age Type: Associated Rock
Age in Years: 54.250000+-1.950000
Material Analyzed: Biotite-muscovite
Age Young: Early Eocene
Analytical Data
Not available
Materials
Ore: Gold
Ore: Scheelite
Ore: Wolframite
Gangue: Quartz
Gangue: Tourmaline
Comments
Comment (Exploration): Status = Inactive.
Comment (Geology): Age = Tertiary; mineralization is interpreted to be linked to the Tertiary Cathedral pluton (Tmc), a biotite- muscovite granite that is part of the 52.3 to 56.2 m.y. McKinley sequence (Reed and Lanphere, 1972; Reed and Nelson, 1980).
Comment (Reference): Primary Reference = Reed and others, 1978
Comment (Geology): Geologic Description = Mesozoic marine sedimentary rocks (KJs) exhibit calc-silicate (skarn) alteration and are cut by a quartz- tourmaline-wolframite-scheelite vein 10 to 20 centimeters wide; the vein contains trace gold (Reed and others, 1978). The occurrence is within the thermal aureole of the Tertiary Cathedral pluton (Tmc), a biotite- muscovite granite that is part of the 52.3 to 56.2 m.y. McKinley sequence (Reed and Nelson, 1980).
Comment (Deposit): Other Comments = This occurrence is within the Denali National Park and Preserve.
Comment (Deposit): Model Name = W veins (Cox and Singer, 1986; model 15a).
Comment (Workings): Workings / Exploration = Reconnaissance mapping, prospecting, stream silt, and rock sampling are all that have been done here. The quartz-tourmaline-wolframite-scheelite vein, 10 to 20 centimeters wide, contains trace gold (Reed and others, 1978).
Comment (Geology): Age = Chron age is for McKinley Sequence.
References
Reference (Deposit): Reed, B.L., and Lanphere, M.A., 1972, Generalized geologic map of the Alaska-Aleutian range batholith showing potassium-argon ages of the plutonic rocks: U.S. Geological Survey Miscellaneous Field Studies Map MF-372, 2 sheets, scale 1:1,000,000.
Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Reference (Deposit): C.C. Hawley and Associates, Inc., 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U.S. Bureau of Mines Open-File Report 24-78, 275 p., 7 plates.
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): 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): Cobb, E.H., and Reed, B.L., 1980, Summaries of data and lists of reference to metallic and selected nonmetallic mineral deposits in the Talkeetna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-884, 106 p.
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