Makushin River Placer

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale UN
Latitude 53.8967
Longitude -166.7792
Nearby scientific data Find additional scientific data near this location
Location and accuracy Locality is about 9 km east of Broad Bay landing strip on the Makushin River and corresponds to locality 4 of Cobb (1972, MF-446). Acccurate within about 300 m.

Geologic setting

Geologic description

A few minute grains of gold panned from 2 tributaries on north side of Makushin River. Above these streams is a conspicuous gossan of altered and pyritized rocks of the Unalaska Formation (see Drewes and others, 1961).
Geologic map unit (-166.781086122753, 53.8958417286959)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary

Production and reserves

Indication of production None

Additional comments

Stream gradient about 75 m/km.