Unnamed (northwest of Port Audrey)

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag
Ore minerals chalcopyrite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale B-3
Latitude 60.357
Longitude -147.7704
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is located on the southeast side of hill 1456 at an elevation of 1,300 feet. It is about 0.1 mile northwest of SR239. It is in the NE1/4 section 18, T. 3 N., R. 10 E., of the Seward Meridian. This is location 216 of Tysdal (1978 [MF-880-A]) and location S-61 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

Bedrock in this area is greenstone of the Orca Group of early Tertiary age (Nelson and others, 1985). The prospect consists of a 10-foot-deep shaft in a 5.5-foot-wide shear zone containing chloritic schist and a massive quartz lens (Kurtak and Jeske, 1986). A 5-inch-wide zone of sulfide-bearing schist occurs within the massive quartz lens. The quartz lens contains as much as 10 percent pyrite and traces of chalcopyrite (Kurtak and Jeske, 1986). Samples from the collar of the shaft contained from 20 to 480 ppm copper and 0.5 to 1.3 ppm silver (Kurtak and Jeske, 1986).
Geologic map unit (-147.772452111156, 60.3564378266923)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Mineral deposit model number 24a
Age of mineralization Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.

Production and reserves

Workings or exploration Workings consist of a single 10-foot-deep shaft that explores a mineralized shear zone. Samples from the collar of the shaft contained from 20 to 480 ppm copper and 0.5 to 1.3 ppm silver (Kurtak and Jeske, 1986).
Indication of production None

References