Unnamed (near Keete Inlet)

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals bornite; chalcopyrite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale A-2
Latitude 55.08122
Longitude -132.48899
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect consists of a flooded shaft just above tidewater, about 0.3 mile south-southwest of the west head of Keete Inlet. It is about 0.4 mile northwest of the center of section 29, T. 78 S., R. 86 E.

Geologic setting

Geologic description

Chapin (1916) originally described this deposit as a 'shear zone' with chalcopyrite, pyrite, and possibly bornite. The only working is a (shallow?) shaft that was flooded in 1915. Maas and others (1991, 1995) describe the deposit as a 1- to 2-foot-thick, copper-bearing, massive sulfide layer between altered chlorite schist and sericite schist of the Wales Group of Late Proterozoic and Cambrian age (Herreid and others, 1978). The sulfides also are disseminated in the wall rock. A 1.1-foot sample near the old shaft contained 1.23 parts per million (ppm) gold, 10.7 ppm silver, and 0.29 percent copper (Maas and others, 1991). There is no record of production. Recent detailed geochemical and isotopic work by Slack and others (2002) confirm that the deposit is of Late Proterozoic or Cambrian age.
Geologic map unit (-132.490657313813, 55.0808677468775)
Mineral deposit model Volcanogenic massive sulfide (Cox and Singer, 1986; model 28a).
Mineral deposit model number 28a
Age of mineralization Probably contemporaneous with deposition of the Late Proterozoic or Cambrian host rocks.
Alteration of deposit Unspecified alteration of schist host rocks.

Production and reserves

Workings or exploration The only working is a shaft sunk before 1916.
Indication of production None

References