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Ivotuk Hills

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Zn
Ore minerals pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale KL
Latitude 68.09
Longitude -155.7
Nearby scientific data Find additional scientific data near this location
Location and accuracy Located on southwest side of the Ivotuk Hills in Otuk Creek. Known to within one mile.

Geologic setting

Geologic description

Pyrite nodules up to 10 cm in diameter with cores of sphalerite occur as float in stream. Outcrops south of the Ivotuk Hills near this site consist of shale and chert of Permian to Jurassic age.
Geologic map unit (-155.702863050563, 68.089503328969)
Mineral deposit model Sediment-hosted Pb-Zn

Production and reserves

Workings or exploration Sphalerite-bearing concretions contain up to 200 ppm As, more than 20 % Fe, and 500 ppm Zn.
Indication of production None

References

MRDS Number A106144

References

Kelley, K.D., and Mull, C.G., 1995, Geochemistry of selected elements in minus-100-mesh and minus-80-mesh sediment samples from the Killik River 1 degree x 3 degree quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies MF-2225-B, 2 sheets, scale 1:250,000.
Kelley, K.D., and Mull, C.G., 1995, Maps showing areas of potential for mineral resources in the Killik River 1 degree x 3 degree quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2225-A, 1 sheet, scale 1:250,000.
Reporters K.D. Kelley
Last report date 2/7/1997