Unnamed (Bremner River aboveThreemile Canyon)

Prospect, Inactive

Commodities and mineralogy

Main commodities Au

Geographic location

Quadrangle map, 1:250,000-scale CV
Quadrangle map, 1:63,360-scale D-1
Latitude 61
Longitude -144.15
Nearby scientific data Find additional scientific data near this location
Location and accuracy This mile-long placer prospect is along the Bremner River just upstream from Threemile Canyon. The map site is at the midpoint of the placer, in SW1/4 sec. 15, T. 10 S., R. 7 E., of the Copper River Meridian. The location of the site is accurate to within 2000 ft. The prospect is shown as #31 in Cobb (1972: MF-392).

Geologic setting

Geologic description

This prospect consists of small amounts of placer gold in alluvium derived from Upper Cretaceous Valdez Group metamorphic rocks (Winkler and Plafker (1981). According to Moffit (1914), high benches of glacial outwash behind a ridge of shale formerly dammed the river and formed a lake, producing a site of gold deposition. The gold is too fine and too sparse to have interested prospectors.
Geologic map unit (-144.152036626465, 60.9995245018985)
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 Unknown.
Indication of production Undetermined

Additional comments

Located on lands within Wrangell-St. Elias National Park.

References