Avan River

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cr
Other commodities Ni
Ore minerals chromite

Geographic location

Quadrangle map, 1:250,000-scale MU
Quadrangle map, 1:63,360-scale A-5
Latitude 68.24
Longitude -161.93
Nearby scientific data Find additional scientific data near this location
Location and accuracy Location plotted is at center of area cited by Cobb and others (1981, p. A16), in headwaters area of Avan River about 1.5 mi (2.4 km) northeast of peak 3970; located to within 1 mi (1.6 km).

Geologic setting

Geologic description

The geology at the Avan River occurrence is dominated by a Jurassic? ultramafic complex approximately 300 square miles in area, that structurally overlies a variety of Paleozoic and Mesozoic marine sedimentary rocks. The assemblages are characterized by extremely complex folding and faulting. The chromite occurs as small layers or bands and as disseminated grains in the north-central part of ultramafic complex. Pyrrhotite and pentlandite have been identified in polished sections of a few samples of chromite-bearing rocks.
Geologic map unit (-161.932977589475, 68.2393705825984)
Mineral deposit model Lode; podiform chromite
Mineral deposit model number 8a
Age of mineralization Jurassic?

Production and reserves

Workings or exploration None
Indication of production None

References