Unnamed (north of Arrigetch Peaks)

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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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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