Unnamed (tributary to Copper River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au

Geographic location

Quadrangle map, 1:250,000-scale CV
Quadrangle map, 1:63,360-scale D-2
Latitude 60.89
Longitude -144.71
Nearby scientific data Find additional scientific data near this location
Location and accuracy This placer occurrence is along a creek between Shiels Glacier and the Copper River. The placer extends 1.5 miles upstream from the Copper River. The map site is at the midpoint of the placer, in the S1/2 sec. 21, T. 11 S., R. 4 E., of the Copper River Meridian. The location of the site is accurate to within 2000 ft. The occurrence is shown as site P-4 in Jansons and others (1984).

Geologic setting

Geologic description

This occurrence consists of small amounts of placer gold in alluvial and colluvial gravels derived from underlying metasedimentary rocks of the Upper Cretaceous Valdez Group (Nelson and others, 1985). A 0.1-cubic-yard sample contained 0.0009 oz. Au/cubic yard (Jansons and others, 1984).
Geologic map unit (-144.712017608349, 60.8895044017416)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Holocene.

Production and reserves

Workings or exploration Site was sampled as part of a 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).
Indication of production None

Additional comments

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

References