The Unnamed (on tributary to South Fork of Kuskokwim River) is a arsenic 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 (on tributary to South Fork of Kuskokwim River) MRDS details
Site Name
Primary: Unnamed (on tributary to South Fork of Kuskokwim River)
Commodity
Primary: Arsenic
Primary: Gold
Secondary: Tungsten
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: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = This unnamed occurrence is a series of sheeted quartz-pyrite veins in Lower Cretaceous Kahiltna flysch adjacent to several, east-west-trending rhyolite dikes cutting the flysch (Bundtzen, Harris, and Gilbert, 1997). The quartz veins dip south and are parallel to the east-west-trending dikes. The Kahiltna flysch is locally thermally upgraded to slate. One sample contained 830 ppm arsenic, 180 ppb gold, and 710 ppm tungsten. A panned concentrate taken just below the mineralized dike swarm contained 1.00 percent tin and 1,400 ppm tungsten.
Comment (Reference): Primary Reference = This description
Comment (Workings): Workings / Exploration = The reporter visited and sampled the site in 1988; anomalous pan concentrate samples were collected by Ellen E. Harris. One sample of sheeted veining contained 830 ppm arsenic, 180 ppb gold, and 710 ppm tungsten. A panned concentrate taken just below the mineralized dike swarm contained 1.00 percent tin and 1,400 ppm tungsten (Bundtzen, Harris, and Gilbert, 1997).
Comment (Deposit): Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).
References
Reference (Deposit): Bundtzen, T.K., Harris, E.E., and Gilbert, W.G., 1997, Geologic Map of the eastern McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-14, 34 pages, one sheet, scale 1:125,000.
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