Unnamed (near Mears Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; As; Mo
Other commodities Cu
Ore minerals pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale A-2
Latitude 61.19
Longitude -147.49
Nearby scientific data Find additional scientific data near this location
Location and accuracy West side of Mears Glacier, 2.2 miles west-northwest of Mount Grosvenor summit. Accurate within 2,000 ft. Locality A-44 of Jansons and others (1984).

Geologic setting

Geologic description

Late Cretaceous metasedimentary rocks of the Valdez Group are cut by a 1 ft wide quartz vein. The vein is heavily limonite-stained and has local copper staining. Pyrite is the only sulfide mineral observed. A USGS grab sample contained 30 ppm Ag, 700 ppm As, and 10 ppm Mo (Jansons and others, 1984).
Geologic map unit (-147.492068964846, 61.1894693211613)
Mineral deposit model Polymetallic veins? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?
Age of mineralization Late Cretaceous or younger; veins cuts Late Cretaceous metasedimentary rocks of the Valdez Group.
Alteration of deposit Oxidation of Fe and Cu minerals.

Production and reserves

Workings or exploration Jansons and others (1984) reported a USGS grab sample contained 30 ppm Ag, 700 ppm As, and 10 ppm Mo.
Indication of production None

References

MRDS Number A106197
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998