The Unnamed (between upper West Fork and Yanert glaciers) is a copper 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 (between upper West Fork and Yanert glaciers) MRDS details
Site Name
Primary: Unnamed (between upper West Fork and Yanert glaciers)
Commodity
Primary: Copper
Primary: Gold
Location
State: Alaska
District: Valdez 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: Massive sulfide, Besshi (Japanese deposits)
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Comments
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Sherwood and others, 1976
Comment (Workings): Workings / Exploration = Surface exploration only.
Comment (Deposit): Model Name = Besshi massive sulfide(?) (Cox and Singer, 1986; model 24b)
Comment (Geology): Geologic Description = The country rocks in the area of this occurrence are Upper Triassic calcareous shale, argillite, sandstone, siltstone, and limestone cut by numerous dikes, sills, and plugs of altered diabase and gabbro (Wilson and others, 1998). The deposit apparently consists of disseminations of chalcopyrite in metasedimentary rocks near the contact of altered gabbro. Samples of the chalcopyrite-bearing rock contained 980 ppm copper and 0.2 ppm gold (Sherwood and others, 1976).
Comment (Geology): Age = Late Triassic or younger.
References
Reference (Deposit): Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of central (interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 17 p., 2 sheetsm, scale 1:500,000.
Reference (Deposit): Sherwood, K.W., Craddock, Campbell, and Smith, T.E., 1976, Mineral occurrences in the upper Wood River, Edgar Creek, and West Fork Glacier areas, central Alaska Range: Alaska Division of Geological & Geophysical Surveys Special Report 14, 13 p.
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