Thorpe Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals magnetite

Geographic location

Quadrangle map, 1:250,000-scale SO
Quadrangle map, 1:63,360-scale D-5
Latitude 64.886
Longitude -164.205
Nearby scientific data Find additional scientific data near this location
Location and accuracy Thorpe Creek is a very small south tributary to the Casadepaga River. The mouth of Thorpe Creek is about 1.9 miles upstream of the mouth of Big Four Creek (SO069). This is locality 65 of Cobb (1972, MF 445; 1978, OF 78-181).

Geologic setting

Geologic description

Gold mining on Thorpe Creek took place where it crosses a bench of the Casadepaga River (Brooks and others, 1901). Bedrock was not encountered here although schist and marble are exposed in the creek's headwaters. Mining between 1900 and 1907 is reported and some coarse gold was recovered (Smith, 1910).
Geologic map unit (-164.207619518201, 64.8852615129647)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary; the numerous incised terraces along the Casadepaga River indicate that more than one cycle of erosion and deposition has developed placer deposits in the area. The low elevations between 170 and 270 feet along the first 11 miles of the river, suggest that Quaternary sea level fluctuations could have influenced placer development.

Production and reserves

Workings or exploration Small-scale placer mining took place between 1900 and 1907.
Indication of production Yes; small