The Unnamed (north of Arrigetch Peaks) is a arsenic and tin 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 (north of Arrigetch Peaks) MRDS details
Site Name
Primary: Unnamed (north of Arrigetch Peaks)
Commodity
Primary: Arsenic
Primary: Tin
Secondary: Bismuth
Location
State: Alaska
District: Koyukuk
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: Sn skarn
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Contact metamorphism and skarn.
Rocks
Not available
Analytical Data
Not available
Materials
Not available
Comments
Comment (Reference): Primary Reference = Grybeck and Nelson, 1981
Comment (Geology): Age = Probably related to Devonian granite.
Comment (Deposit): Model Name = Skarn (Cox and Singer, 1986; model 14b)
Comment (Deposit): Other Comments = Located within Gates of the Arctic National Park.
Comment (Geology): Geologic Description = This occurrence consists of selected float samples of iron-stained Paleozoic schist and skarn. The source of the float probably is a contact-metamorphic zone adjacent to Devonian granite that crops out to the south. Selected samples contained up to 5000 ppm As, 20 ppm Bi, and 1000 ppm Sn (Grybeck and Nelson, 1981). This occurrence probably is similar in origin to other Devonian contact-metamorphic deposits in nearby areas of the Brooks Range (Newberry and others, 1986).
Comment (Workings): Workings / Exploration = Sampled during regional geologic mapping by the USGS in the late 1970s.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Newberry, R.J., Dillon, J.T., and Adams, D.D., 1986, Regionally metamorphosed calc-silicate-hosted deposits of the Brooks Range, northern Alaska: Economic Geology, v. 81, p. 1728-1752
Reference (Deposit): Grybeck, D.J., and Nelson, S.W., 1981, Mineral deposit map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-F, 1 sheet, scale 1:250,000.
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