Unnamed (Knight Island, north shore of Mummy Bay)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Cr; Zn
Ore minerals malachite

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale A-3
Latitude 60.2228
Longitude -147.8306
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located on the northwest shore of Mummy Bay, 1.2 miles north-northwest of Oceanic seaplane base. It is in the NE1/4 section 35, T. 2 N., R. 9 E., of the Seward Meridian. This is location 248 of Tysdal (1978 [MF-880-A]) and location S-32 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The occurrence is hosted in sheared greenstone of the Orca Group of early Tertiary age (Nelson and others, 1985). Tysdal (1978 [MF-880-A]) reported iron- and malachite-stained sheared greenstone that contained 500 ppm copper, 300 ppm chrome, and 100 ppm zinc. No other information is published.
Geologic map unit (-147.832661637671, 60.2222315848999)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Mineral deposit model number 24a
Age of mineralization Tertiary or younger; the occurrence is in rocks of the Orca Group of Tertiary age.
Alteration of deposit Basalt altered to greenstone.

Production and reserves

Workings or exploration Tysdal (1978 [MF-880-A]) reported iron- and malachite-stained sheared greenstone that contained 500 ppm copper, 300 ppm chrome, and 100 ppm zinc. No other information is published.
Indication of production None

References