Red Mountain

Occurrence, Active

Commodities and mineralogy

Main commodities Cr
Other commodities Au; Pt
Ore minerals chromite
Gangue minerals augite; hornblende; olivine

Geographic location

Quadrangle map, 1:250,000-scale HG
Quadrangle map, 1:63,360-scale D-6
Latitude 58.947
Longitude -161.763
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the west flank of Red Mountain, at an elevation of about 650 feet. It is sample locality 44 of Berryhill (1963) and is approximately located, probably within about 1/4 mile. It is locality 6 of Cobb (1972 [MF 362]; 1980 [OF 80-909]).

Geologic setting

Geologic description

Berryhill (1963, sample locality 44) collected a shovel sample of surface materials at this location and determined that the heavy mineral concentrates contained small amounts of chromite (1 to 10 percent) and traces of Pt and Au. Augite, hornblende, and olivine were reported to be present in amounts exceeding 10 percent. This occurrence is on the steeper part of the west flank of Red Mountain, a composite ultramafic pluton containing abundant dunite. The surface materials at this site are expected to be mostly colluvial and to have been derived directly from erosion of the Red Mountain pluton.
Geologic map unit (-161.765232317419, 58.9462165431984)
Mineral deposit model Placer PGE-Au (Cox and Singer, 1986; model 39b)
Mineral deposit model number 39b
Age of mineralization Holocene.

Production and reserves

Workings or exploration No workings are present.
Indication of production None