Unnamed (head of Hartman River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals arsenopyrite; chalcopyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale LH
Quadrangle map, 1:63,360-scale C-2
Latitude 61.5939
Longitude -153.5886
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in the peaks at the head of the southeast headwaters of the Hartman River. It is at an elevation of about 5,800 feet on the west flank of peak 6215. The map site is in the NW1/4 section 2, T 17 N, R 24 W, of the Seward Meridian. This is locality 5 of Cobb (1972 [MF 412]; Cobb, 1976 [OF 76-485]) and locality 20 of Gamble and others (1989). The location is probably accurate to within a quarter of a mile.

Geologic setting

Geologic description

Reed and Elliott (1970) reported a 3-foot-wide quartz vein containing 10 percent arsenopyrite and lesser chalcopyrite, pyrite, and pyrrhotite in a shear zone cutting upper Mesozoic sedimentary rocks at this locality. In addition to base metal anomalies, samples contain up to 10 ppm silver and 0.1 ppm gold. This mineralized area is about a mile from a small Tertiary granitic intrusive.
Geologic map unit (-153.590847885822, 61.593256217975)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986, model 22c)
Mineral deposit model number 22c
Age of mineralization Tertiary? Mineralization crosscuts Upper Mesozoic sedimentary rocks. Polymetallic mineralization in this region is commonly associated with Tertiary granitic rocks.
Alteration of deposit Quartz veining.

Production and reserves

Workings or exploration Reconnaissance sampling has been completed in this area (Reed and Elliott, 1970).
Indication of production None