The Unnamed (in headwaters of Wood River) is a copper 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
Satelite View
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 (in headwaters of Wood River) MRDS details
Site Name
Primary: Unnamed (in headwaters of Wood River)
Commodity
Primary: Copper
Location
State: Alaska
District: Bonnifield
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
Role: Host
Age Type: Host Rock
Age Young: Triassic
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Comments
Comment (Workings): Workings / Exploration = Surface exploration only. A sample contained 750 ppm copper and 2.4 ppm silver (Sherwood and others, 1976).
Comment (Geology): Age = Gabbroic hostrocks are undated, but may be Triassic.
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 the Devonian Yanert Fork sequence, an intensely deformed, thick marine sequence of dominantly of metasedimentary and metavolcanic rocks. Most of the sequence is siliceous mudstone, argillite, slate, phyllite, semischist, impure quartzite, and metachert. The sequence is intruded by gabbroic dikes and sills (Wilson and others, 1998). The occurrence consists of chalcopyrite disseminations in the gabbroic sills and dikes. A sample contained 750 ppm copper and 2.4 ppm silver (Sherwood and others, 1976).
Comment (Reference): Primary Reference = Sherwood and others, 1976
Comment (Geology): Age = Host rock is Triassic.
Comment (Deposit): Other Comments = One of several minor copper showings in this belt of rocks.
Comment (Exploration): Status = Inactive
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.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
