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Leffingwell Glacier

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Mo
Other commodities Mo
Ore minerals molybdenite

Geographic location

Quadrangle map, 1:250,000-scale ML
Latitude 69.33
Longitude -144.12
Nearby scientific data Find additional scientific data near this location
Location and accuracy Accurate to within 1,220 meters (4,000 ft.). Brosge' and Reiser, 1976, Location 25 and Grybeck, 1977, p. 39, Location 9;

Geologic setting

Geologic description

Scattered molybdenite crystals and small aggregates of molybdenite that are less than 1.25 centimeters (.5 in. ) across are present at two localities in fresh granite of the Okpilak batholith.
Geologic map unit (-144.122741649905, 69.3297606355994)
Mineral deposit model Lode; disseminated Mo
Age of mineralization Probably Early Devonian

Production and reserves

Workings or exploration None
Indication of production None

References

MRDS Number A015639

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.
Sable, E.G., 1977, Geology of the western Romanzoff Mountains, Brooks Range, northeastern Alaska: U.S. Geological Survey Professional Paper 897, 84 p., plates.
Reporters Powers, M.T. (Huber, D.F.), Schmidt, J.M., Kelley, J.S.
Last report date 9/15/1996