Unnamed (near peak 6305)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals native copper

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-1
Latitude 63.0602
Longitude -144.2662
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is float that was found in a saddle about 0.2 mile west-northwest of peak 6305. It is at an elevation of about 5,850 feet and is about 1.3 miles southwest of Gillett Pass. The occurrence is in the SW1/4SW1/4 section 22, T. 15 N., R. 6 E., Copper River Meridian. It corresponds to locality 2 of Richter and others (1977) and locality 33 on figure 6 of Cobb (1979 [OFR 79-238]). The location is probably accurate within 0.2 mile.

Geologic setting

Geologic description

The rocks at this occurrence are Nikolai Greenstone of Late Triassic age; they are overlain to the east by Upper Triassic limestone (Richter and others, 1977). These units were mapped earlier, respectively, as the Slana basalt and Jack limestone (Richter 1967). Native copper occurs in float at the site; the Nikolai Greenstone is the probable source.
Geologic map unit (-144.268430147201, 63.0598131103499)
Mineral deposit model Basaltic Cu (Cox and Singer, 1986; model 23).
Mineral deposit model number 23
Age of mineralization Late Triassic or younger, on the basis of the age of probable host rocks.

Production and reserves

Workings or exploration There are no workings. Native copper was found in float at the site.
Indication of production None