Unnamed (near Crescent Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au
Ore minerals arsenopyrite; chalcopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale A-3
Latitude 61.02
Longitude -147.91
Nearby scientific data Find additional scientific data near this location
Location and accuracy At terminus of Cresent Glacier. Accurate within 1,000 ft. Locality A-18 of Jansons and others (1984).

Geologic setting

Geologic description

Quartz float contains pyrite, arsenopyrite, and chalcopyrite. A float sample contained no detectable gold and 0.03 oz/ton Ag. Bedrock in the vicinity is the Late Cretaceous metasedimentary rocks of the Valdez Group. A minor amount of placer gold present (Jansons and others, 1984).
Geologic map unit (-147.912048778847, 61.0194417955709)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Late Cretaceous or younger.

Production and reserves

Workings or exploration Quartz float sample contained no detectable gold and 0.03 oz/ton Ag. Placer gold was present in minor amounts. Jansons and others (1984) reported low mineral development potential.
Indication of production None

References

MRDS Number A106191
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998