Unnamed (south of head of McCallie Creek)

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Ag; Au; Pb; Zn
Other commodities Cu
Ore minerals arsenopyrite; chalcopyrite; galena; sphalerite; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-6
Latitude 63.1
Longitude -149.96
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 5,400 feet, on a ridge above the valley glaciers south of the head of McCallie Creek. The map site is about 0.5 mile south-south-west of peak 5480, in the NW1/4 of sec. 13, T. 21 S., R. 3 W., of the Fairbanks Meridian. The accuracy of the location is within 1 mile. This is location E-31 of Balen (1990: OFR 34-90).

Geologic setting

Geologic description

The country rocks at this prospect are Upper Triassic limestone and basalt flows. The deposit consists of disseminated sulfides in the country rocks, and a stockwork of sulfide-bearing quartz veinlets. The sulfide minerals are arsenopyrite, stibnite, chalcopyrite, galena, and sphalerite. The stockwork is about 100 feet wide, and is open along strike. Analyses of 27 samples gave maximum values of 0.9 ounces of gold per ton , 4.4 ounces of silver per ton, 1.8 percent lead, 1.2 percent zinc and 4 percent antimony (Balen, 1990: OFR 34-90).
Geologic map unit (-149.962284963181, 63.0995172454978)
Mineral deposit model Polymetallic vein (Cox and Singer, 1986; model 22c)
Mineral deposit model number 22c
Age of mineralization Late Triassic or younger.
Alteration of deposit Gossan developed at surface.

Production and reserves

Workings or exploration There has only been surface sampling.
Indication of production None

Additional comments

This deposit was discovered during regional geologic reconnaissance by the Bureau of LAnd Management (Balen and others, 1991).

References