Unnamed (head of Hartman River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Sb
Ore minerals stibnite

Geographic location

Quadrangle map, 1:250,000-scale LH
Quadrangle map, 1:63,360-scale A-2
Latitude 61.6481
Longitude -153.5786
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in the peaks between Sled Pass and the southeast headwaters of the Hartman River. It is at an elevation of about 5,900 feet, 1.3 miles east-southeast of peak 7435. The map site is in the SW1/4 section 14, T 18 N, R 24 W, of the Seward Meridian. This is locality 4 of Cobb (1972 [MF 412]; 1976 [OF 76-485]) and locality 18 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 blocks of massive stibnite as much as a foot across in frost-heaved rubble near the top of the ridge and in talus. This float is within a few feet of its source, which is probably stibnite-bearing veins localized along faults or shears in Upper Mesozoic argillite and graywacke. In addition to high concentrations of antimony, samples contain as much as 500 ppm lead and 0.45 ppm gold. The mineralized area is near the contact with a Cretaceous or Tertiary granite pluton.
Geologic map unit (-153.580844409305, 61.6474593553779)
Mineral deposit model Simple Sb deposits (Cox and Singer, 1986, model 27d)
Mineral deposit model number 27d
Age of mineralization Tertiary? Mineralization crosscuts Upper Mesozoic sedimentary rocks. Polymetallic mineralization in this region is commonly associated with Tertiary granitic rocks.

Production and reserves

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

References