Unnamed (near Mendenhall Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale JU
Quadrangle map, 1:63,360-scale B-2
Latitude 58.4355
Longitude -134.4678
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of approximately 1,500 feet on the southeast margin of the lower Mendenhall Glacier, 1.5 miles west of Bullard Mountain. It is near the center of the SW1/4 section 33, T. 39 S., R. 66 E. of the Copper River Meridian. The location is accurate within 1/4 mile.

Geologic setting

Geologic description

This occurrence consists of a 10-foot-thick zone of reddish-brown oxide staining in biotite schist that contains disseminated chalcopyrite. The zone also contains several discordant quartz veins 6-24 inches thick. The quartz veins contain pyrite and pyrrhotite and are cut by garnet-aplite sills. U.S. Bureau of Mines samples contained up to 820 ppm copper and 905 ppm zinc (Redman and others, 1989).
Geologic map unit (-134.469575910666, 58.4351770543322)
Alteration of deposit Iron-oxide staining.

Production and reserves

Workings or exploration Surface sampling only.
Indication of production None

References