The Unnamed (head of South Fork Kuskokwim River) is a tin, molybdenum, copper, and silver 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
Elevation:
Commodity: Tin, Molybdenum, Copper, Silver
Lat, Long: 61.51833, -153.48028
Map: View on Google Maps
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Unnamed (head of South Fork Kuskokwim River) MRDS details
Site Name
Primary: Unnamed (head of South Fork Kuskokwim River)
Commodity
Primary: Tin
Primary: Molybdenum
Primary: Copper
Primary: Silver
Location
State: Alaska
District: McGrath
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: Porphyry Cu-Mo
Model Name: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Quartz-tourmaline veining and replacement(?).
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Pyrite
Gangue: Quartz
Gangue: Tourmaline
Comments
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Reed and Elliott, 1970
Comment (Workings): Workings / Exploration = Reconnaissance sampling has been completed in this area (Reed and Elliott, 1970).
Comment (Deposit): Model Name = Polymetallic veins and porphyry Cu ? (Cox and Singer, 1986, models 22c and 21a?)
Comment (Geology): Geologic Description = Reed and Elliott (1970) reported finding two sulfide-bearing boulders at this locality. The boulders are of Tertiary quartz diorite and diorite gneiss (Cobb and Reed, 1981). The quartz diorite boulder contained quartz-tourmaline veins carrying 15 percent chalcopyrite and 5 percent pyrite. The diorite gneiss boulder contained tourmaline and 15 percent disseminated chalcopyrite. Rock samples contained as much as 50 ppm silver, 700 ppm molybdenum, 700 ppm tin, and 0.7 ppm gold.
Comment (Geology): Age = Tertiary. Quartz veins and mineralization crosscut Tertiary intrusive rocks.
References
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-485, 101 p.
Reference (Deposit): Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part A, Summaries to January 1, 1981: U.S. Geological Survey Open-File Report 81-1343-A, 25 p.
Reference (Deposit): Reed, B.L., and Elliott, R.L., 1970, Reconnaissance geologic map, analyses of bedrock and stream sediment samples, and an aeromagnetic map of parts of the southern Alaska Range: U.S. Geological Survey Open-File Report 70-217, 145 p., 1 sheet, scale 1:250,000. (Also published as U.S. Geological Survey Open-File Report 413).
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): Cobb, E.H., 1972, Metallic mineral resources map of the Lime Hills quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-412, 1 sheet, scale 1:250,000.
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