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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Unnamed MRDS details
Site Name
Primary: Unnamed
Secondary: Western Crazy Mountains
Commodity
Primary: Chromium
Location
State: Alaska
District: Circle
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: Chromite
Comments
Comment (Reference): Primary Reference = Barker, 1984.
Comment (Workings): Workings / Exploration = Surface samples taken.
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = The western Crazy Mountains are composed of a complexly faulted succession of predominantly clastic, weakly metamorphosed sedimentary rocks. They have either been intruded by or are in fault contact with mafic sills, dikes, and at least several small intrusive, stock-like bodies (Barker, 1984, p. 6). The western Crazy Mountains are bounded on the south by the prominent Preacher Creek Fault (Weber and Foster, 1980), a splay of the Tintina Fault.? A silicified chert-pebble conglomerate exposed on a hillside overlies an altered zone inferred to be a thrust fault. Disseminated grains in the silica matrix were tentatively identified as chromite, and make up about 1 percent of the conglomerate. Petrographic examination indicated that sericite in the matrix and halos of fuchsite (chrome mica) around the chromite grains have developed as alteration products (Barker, 1984, p. 13, 14). Analysis shows 2000 ppm Cr (Barker, 1984, p. 15).
References
Reference (Deposit): Barker, J.C., 1984, Concentration of cobalt and other metals in the western Crazy Mountains, interior Alaska: U.S. Bureau of Mines Open-File Report 213-84, 44 p.
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