Unnamed (Chistochina River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities W
Other commodities Fe
Ore minerals pyrite; scheelite
Gangue minerals magnetite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-3
Latitude 63.1866
Longitude -145.0061
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 3,750 feet and south of the toe of the glacier at the head of West Fork Chistochina River, in the NE1/4 section 14, T. 20 S., R. 14 E., Fairbanks Meridian. It corresponds to locality 4 in figure 6 of Cobb (1979 [OFR 79-238]), which is the location of panned concentrate sample 41 of Rose (1967).

Geologic setting

Geologic description

The occurrence is for floodplain gravels of the Chistochina River. A panned concentrate contained about 30 percent magnetite, 10 percent pyrite (which may include pyrrhotite and chalcopyrite), and 6 grains of scheelite (Rose, 1967). Two grains of scheelite were found in panned concentrates from two nearby sites.
Geologic map unit (-145.008321925614, 63.1861980977344)
Mineral deposit model Black-sand placer; scheelite occurs in magnetite-rich placer concentrate.
Age of mineralization Holocene.

Production and reserves

Workings or exploration No workings.
Indication of production None