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Eskimo

Occurrence, Active

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Commodities and mineralogy

Main commodities Cu
Ore minerals chalcocite; malachite

Geographic location

Quadrangle map, 1:250,000-scale BM
Quadrangle map, 1:63,360-scale C-6
Latitude 67.51
Longitude -161.68
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 7 miles southeast of the headwaters of Agashashok River. It is in section 12, T.24 N., R. 14 W., of the Kateel River Meridian. Location is accurate to within 3,000 feet. Grybeck (1977), location 2, Schmidt and Allegro (1988), location 72.

Geologic setting

Geologic description

The bedrock in this area is mapped as Devonian Skajit limestone, dolomite and marble with gray phyllite (Schmidt and Allegro, 1988). This occurrence consists of chalcocite and malachite in bleached limestone. The bedrock is cut by small quartz stringers.
Geologic map unit (-161.682871748322, 67.5093616966297)
Mineral deposit model Sulfide-bearing quartz stringers in Paleozoic limestone.
Age of mineralization Devonian?
Alteration of deposit Bleaching of limestone.

Production and reserves

Workings or exploration Twenty-five claims were staked in the area in 1966. There was renewed activity in the area in the 1990s by local prospectors who have been mapping and sampling the area (Roy Barr, personal communication, 1997).
Indication of production None

Additional comments

Located within the Noatak National Preserve.

References

MRDS Number A015616

References

Grybeck, Donald, 1977, Map showing known mineral deposits of the Brooks Range, Alaska: U.S. Geological Survey Open-File Report 77-166-C, 45 p., 1 sheet, scale 1:1,000,000.
Reporters Anita Williams (Anchorage, AK)
Last report date 12/29/1999