The Unnamed (lower part of south fork of Gravina River) is a tungsten 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 (lower part of south fork of Gravina River) MRDS details
Site Name
Primary: Unnamed (lower part of south fork of Gravina River)
Commodity
Primary: Tungsten
Location
State: Alaska
District: Copper River
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
Alteration Type: L
Alteration Text: Silicification.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Scheelite
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Jansons and others, 1984
Comment (Workings): Workings / Exploration = Area examined by the U.S. Bureau of Mines as part of a mineral evaluation of the Chugach National Forest. Analysis of one sample yielded 245 ppm W (Jansons and others, 1984).
Comment (Deposit): Other Comments = Occurrence is on Chugach National Forest land.
Comment (Geology): Geologic Description = This site is on a gravel bar in the Gravina River. Float samples from the area include altered and silicified felsic intrusive rocks containing chalcopyrite, pyrite, and scheelite. Analysis of one sample yielded 245 ppm W (Jansons and others, 1984).
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.
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