Unnamed (southeast of upper Terrace Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Cu
Other commodities Co

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale C-3
Latitude 62.5298
Longitude -148.2152
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 5,700 feet, about 0.3 mile south of the top of hill 5945 and about 1.1 mile east of lake 4247 at the head of Terrace Creek. The location is accurate to within 1/4 mile.

Geologic setting

Geologic description

This occurrence consists of rusty-weathering, biotite-rich, semischist cut by Jurassic granodiorite (J. Schmidt, written communication, 2001). A U.S. Geological Survey rock sample contains 607 parts per million copper, 0.027 part per million gold, and 55 parts per million cobalt. (The 0.027-part-per-million gold value is based on a fire assay that may be low.)
Geologic map unit (-148.217414941238, 62.5293267953089)
Alteration of deposit Iron-oxides.

Production and reserves

Workings or exploration Only surface sampling by U.S. Geological Survey (J. Schmidt, written communication, 2001).
Indication of production None