Unnamed (near Mt. Foraker)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Mo
Other commodities As
Ore minerals arsenopyrite; chalcopyrite; gold; pyrite

Geographic location

Quadrangle map, 1:250,000-scale TL
Quadrangle map, 1:63,360-scale D-3
Latitude 62.937
Longitude -151.288
Nearby scientific data Find additional scientific data near this location
Location and accuracy Reed and others (1978, locality 33) show this occurrence on southeast flank of Mt. Foraker, about 3.2 miles southeast from the summit, in the northwest quarter of Section 24, T. 33 N., R. 11 W., of the Seward Meridian within Denali National Park and Preserve.

Geologic setting

Geologic description

The area is underlain by Paleozoic argillite (Pzus) and Middle to Upper Devonian limestone (Dl) that are cut by the middle Tertiary (38 m.y.) granodiorite of the Mt. Foraker pluton (Tf) (Reed and Nelson, 1980). Disseminated pyrite, chalcopyrite and other sulfides occur in sheared sedimentary rocks. Nearby float contains massive arsenopyrite with up to 0.45 oz/ton gold (Reed and others, 1978).
Geologic map unit (-151.290265273697, 62.936471945009)
Age of mineralization Middle Tertiary; mineralization is interpreted to be related to the Mt. Foraker pluton which is described as a 38 m.y. old pluton Reed and Nelson (1980).

Production and reserves

Workings or exploration Reconnaissance mapping, stream silt and rock sampling (Reed and others, 1978; Reed and Nelson, 1980) are all that have been described here. Nearby float contains massive arsenopyrite with up to 0.45 oz/ton gold (Reed and others, 1978).
Indication of production None

Additional comments

This site is located within Denali National Park and Preserve.

References