Red Mountain

Occurrence, Active?

Commodities and mineralogy

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

Geographic location

Quadrangle map, 1:250,000-scale HG
Quadrangle map, 1:63,360-scale D-6
Latitude 58.95
Longitude -161.77
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is in a small drainage on the lower west flank of Red Mountain. It is 1/4 mile east of the beach and 1 1/4 mile west of the summit of Red Mountain. It is locality 5 of Cobb (1972 [MF 362]; 1980 [OF 80-909]).

Geologic setting

Geologic description

Berryhill (1963, sample locality 47) 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. Both hornblende and olivine were reported to be present in amounts exceeding 10 percent. This occurrence is in a small drainage on the lower west flank of Red Mountain, a composite ultramafic pluton containing abundant dunite. The surface materials at this site are apparently derived directly from erosion of the Red Mountain pluton.
Geologic map unit (-161.772235019787, 58.949216805053)
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

References