The Unnamed is a chromium 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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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Unnamed MRDS details
Site Name
Primary: Unnamed
Commodity
Primary: Chromium
Secondary: Nickel
Location
State: Alaska
District: Willow Creek
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: Alaskan Cr-Pt (PGE)
Model Name: Podiform chromite (minor)
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Slight serpentinization of olivine.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chromite
Comments
Comment (Workings): Workings / Exploration = Surface mapping and sampling.
Comment (Deposit): Model Name = Podiform chromite or Alaskan PGE (Cox and Singer, 1986; models 8a or 9)
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Clark, 1972
Comment (Deposit): Other Comments = Concentration of chromite is not economical for mining (Clark, 1972).
Comment (Geology): Age = Lower to Middle Jurassic
Comment (Geology): Geologic Description = Ultramafic rocks of the Jurassic Wolverine Complex. According to Clark (1972), dunite contains chromite-rich bands 0.5-1 inch thick at the bases of 6 to 12 inch thick layers of olivine cumulate. Chromite bands comprise approximately 5 percent of outcrop and minor anomalous nickel occurs nearby in associated ophiolitic rocks.
References
Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.
Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 1 sheet, scale 1:250,000.
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): Clark, S.H.B., 1972, The Wolverine complex, a newly discovered layered ultramafic body in the western Chugach Mountains, Alaska: U.S. Geological Survey Open-File Report 522, 10 p.
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