Unnamed (north of lower Childs Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale CV
Quadrangle map, 1:63,360-scale C-3
Latitude 60.685
Longitude -144.837
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1200 feet at the north edge of lower Childs Glacier, about one mile south of Mt. O'Neel. It is in SE1/4 sec. 3, T. 14 S., R. 3 E., of the Copper River Meridian. Site is accurately located to within 1000 ft. This location as site C-10 of Jansons and others (1984).

Geologic setting

Geologic description

This occurrence consists of pyrite and chalcopyrite disseminated in interbedded slate and greenstone of the Upper Cretaceous Valdez Group (Nelson and others, 1985). Four grab samples collected and analyzed by the U.S. Bureau of Mines contained 34 ppm to 0.64% Cu, and 110 ppm to 0.17% Zn (Jansons and others, 1984). This site is at the eastern end of a 65-mile-long belt of similar rocks that to the west host massive sulfide deposits (Nelson and others, 1984; 1985; Crowe and others, 1992).
Geologic map unit (-144.838994184562, 60.6844810297769)
Mineral deposit model Besshi massive sulfide (Cox and Singer, 1986; model 24b)
Mineral deposit model number 24b
Age of mineralization Late Cretaceous based on the age of the host rocks.

Production and reserves

Workings or exploration
Site examined during U.S. Bureau of Mines and U.S.G.S. mineral resource assessment of the Chugach National Forest (Jansons and others, 1984; Nelson and others, 1984).
Four grab samples collected and analyzed by the U.S. Bureau of Mines contained 34 ppm to 0.64% Cu, and 110 ppm to 0.17% Zn (Jansons and others, 1984).
Indication of production None

Additional comments

Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

References