The Unnamed (east of Stony 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
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Unnamed (east of Stony River) MRDS details
Site Name
Primary: Unnamed (east of Stony River)
Commodity
Primary: Copper
Secondary: Silver
Location
State: Alaska
District: Aniak
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 and epidote replacement.
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrite
Ore: Pyrrhotite
Gangue: Epidote
Gangue: Quartz
Comments
Comment (Geology): Age = Tertiary. Mineralization is in the altered zone around a Tertiary pluton.
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Resource Associates of Alaska, 1976
Comment (Workings): Workings / Exploration = Reconnaissance sampling has been completed in this area.
Comment (Deposit): Model Name = Disseminated sulfides in contact zone of granitic pluton
Comment (Geology): Geologic Description = Cobb and Reed (1981) reported that chalcopyrite, pyrite, and pyrrhotite occur as blebs and disseminations in Cretaceous(?) metasedimentary rocks adjacent to a Tertiary granitic pluton. The mineralization is localized in metasiltstone and metaconglomerate adjacent to and in roof pendants of the quartz diorite to quartz monzonite pluton. The metasedimentary rocks contain blebs and vugs of epidote, quartz, and feldspar. The area is crosscut by a regional northwest-trending fault. A 1,500-foot-diameter gossan containing 20 percent pyrite lies to the north of the occurrence. Rock samples contain as much as 2,700 ppm coppper and 7 ppm silver (Resource Associates of Alaska, 1976).
References
Reference (Deposit): Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, 109 p.
Reference (Deposit): Gamble, B.M., Bailey, E. A., and Reed, B. L., 1989, Gold occurrences near Snowcap Mountain, Lime Hills B-2 quadrangle, Alaska: U.S. Geological Survey Open-File Report 89-0646, 8 p.
Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
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