Unnamed (headwaters of the Kukpowruk River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals malachite

Geographic location

Quadrangle map, 1:250,000-scale DL
Quadrangle map, 1:63,360-scale B-2
Latitude 68.43
Longitude -162.76
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,650 feet on the east bank of the upper Kukpowruk River. The map site is in section 6, T. 12 S., R. 46 W., of the Umiat Meridian. Location is accurate to within 1 mile.

Geologic setting

Geologic description

This occurrence consists of malachite that coats a 6-inch-wide fracture zone subparallel to bedding in Mesozoic maroon shale (C.F. Mayfield, written communication, 1979). Nearby creek gravels are iron stained.
Geologic map unit (-162.763004766716, 68.4293566409571)
Mineral deposit model Secondary copper mineral coating a fracture.
Age of mineralization Mesozoic?
Alteration of deposit Oxidation of copper mineral.

Production and reserves

Indication of production None


MRDS Number A015694
Reporters Anita Williams (Anchorage, AK)
Last report date 12/21/1999