Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Co; Mn; Zn
Ore minerals chalcopyrite; pyrite
Gangue minerals epidote; iron oxides; magnetite

Geographic location

Quadrangle map, 1:250,000-scale BM
Quadrangle map, 1:63,360-scale D-6
Latitude 67.89
Longitude -161.77
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrences is at an elevation of about 600 feet, adjacent to Kivivik Creek about 5 miles above its confluence with the Noatak River. It is in section 24, T. 29 N., R. 14 W., of the Kateel River Meridian. Schmidt and Allegro (1988), location 4; field stations 84JS026A-D and 84PF070R.

Geologic setting

Geologic description

At the occurrence, basalts of probable Jurassic age contain both disseminated chalcopyrite and pyrite, and pyrite and epidote in vesicles. A 30- by 40-meter area of red-orange-stained, pillow basalt contains pyrite, minor chalcopyrite and ochre. Magnetite occurs in the sediment of the stream draining this occurrence. A sample of pyrite contained 120 ppm Zn, 1 ppm Ag, 50 ppm Co, 300 ppm Cu, and 1000 ppm Mn. A sample from a heavily stained area contained 150 ppm Cu and 1000 ppm Mn. An ochre sample contained 110 ppm Zn and 200 ppm Cu. A sample of pyrite and epidote in vesicles contained 20 ppm As, 0.5 ppm Ag, and 1500 ppm Mn. A sample of chalcopyrite and pyrite in basalt contained 2 ppm Ag, 50 ppm Co and 500 ppm Cu (Schmidt and Allegro, 1988).
Geologic map unit (-161.77292452202, 67.8893666086573)
Mineral deposit model Basaltic copper (Cox and Singer, 1986; model 23).
Mineral deposit model number 23
Age of mineralization Jurassic?
Alteration of deposit Iron-oxide staining.

Production and reserves

Workings or exploration Area was visited and sampled by the U.S. Geological Survey (Schmidt and Allegro, 1988).
Indication of production None

Additional comments

Located in the Noatak Wilderness.


MRDS Number 10307261
Reporters Anita Williams (Anchorage, AK)
Last report date 12/29/1999