The Unnamed (south of upper Windy Creek) 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
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Unnamed (south of upper Windy Creek) MRDS details
Site Name
Primary: Unnamed (south of upper Windy Creek)
Commodity
Primary: Copper
Secondary: Silver
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: Skarn Cu
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Skarn and subsequent weathering and oxidation.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Malachite
Ore: Pyrrhotite
Gangue: Calcite
Gangue: Diopside
Gangue: Wollastonite
Comments
Comment (Reference): Primary Reference = Hickman and Craddock, 1976
Comment (Geology): Age = Late Cretaceous or younger.
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = The country rocks in the area of this occurrence are Devonian to Ordovician argillite and interbedded limestone that have been intruded by small plugs of Upper Cretaceous to Lower Tertiary quartz diorite. The deposit consists of a 3- to 9-foot-wide skarn containing discontinuous, 1- to 3-foot-thick zones of pyrrhotite and minor chalcopyrite along fractures. Weathering and oxidation have produced a heavy limonitic coating, malachite, and erythrite. Samples contain 1,900 ppm copper and 0.6 ppm silver (Hickman and Craddock, 1976).
Comment (Workings): Workings / Exploration = Surface sampling only. Samples contain 1,900 ppm copper and 0.6 ppm silver (Hickman and Craddock, 1976).
Comment (Deposit): Other Comments = the site is in Denali National Park Wilderness.
Comment (Deposit): Model Name = Cu skarn (Cox and Singer, 1986; model 18b)
References
Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-1062, 113 p.
Reference (Deposit): Hickman, R.G., and Craddock, Campbell, 1976, Mineral occurrences near Cantwell, southcentral Alaska: Alaska Division of Geological "&" Geophysical Surveys Special Report 13, 7 p.
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