Unnamed (in Selawik Hills)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; malachite; pyrite
Gangue minerals calcite; chlorite; epidote

Geographic location

Quadrangle map, 1:250,000-scale SE
Quadrangle map, 1:63,360-scale A-2
Latitude 66.16
Longitude -159.62
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 550 feet at the east edge of section 24, T. 9 N., R. 5 W., of the Kateel River Meridian. Barker (1985), fig. 7, location L.

Geologic setting

Geologic description

The country rocks at this occurrence consist of Jurassic metabasalt and metasedimentary rocks. The occurrence consists of pyrite, malachite, and minor chalcopyrite in calcite, chlorite and epidote veins in chlorite-altered basalt (greenstone) and in fine-grained banded metasedimentary rocks. Metallic minerals in the veins occur as veinlets and pods. Sulfide banding in the greenstone consists predominately of pyrite. Copper values in high-grade grab samples did not exceed 1,000 ppm. Copper values greater than 100 ppm were noted in a stream-sediment sample taken from a stream which drains the site (Barker, 1985).
Geologic map unit (-159.622705692318, 66.1593724726823)
Mineral deposit model Basaltic Cu? (Cox and Singer, 1986; model 23)
Mineral deposit model number 23?
Age of mineralization Jurassic?
Alteration of deposit Chlorite and epidote.

Production and reserves

Workings or exploration Site was sampled by the U.S. Bureau of Mines (Barker, 1985).
Indication of production None

Additional comments

This occurrence is on the boundary of the Selawik National Wildlife Refuge.

References