Unnamed (south of Chistochina Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-2
Latitude 63.1758
Longitude -144.765
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is at an elevation of about 5,500 feet near the head of a north-flowing tributary glacier to Chistochina Glacier. The occurrence is in the SW1/4SW1/4 section 18, T. 20 S., R. 16 E., Fairbanks Meridian. The site corresponds to locality 22 of Rose (1967), locality 23 on figure 6 of Cobb (1979 [OFR 79-238]), and locality 141 in table 2 of Nokleberg and others (1991).

Geologic setting

Geologic description

The rocks in the vicinity of the occurrence are argillite, probably of the Eagle Creek Formation of Early Permian age (Richter and Dutro, 1975), a unit formerly assigned to the Mankomen Formation. The rock has been pyritized. An assay showed a trace of gold and 0.12 ounce of silver per ton (Rose, 1967).
Geologic map unit (-144.767231145226, 63.1754063296234)
Age of mineralization Early Permian or younger.
Alteration of deposit Pyritization.

Production and reserves

Workings or exploration The mineral site is a natural outcrop; only limited surface sampling has been done.
Indication of production None