Unnamed (in Stampede Creek)

Prospect, Inactive

Commodities and mineralogy

Main commodities Sb
Ore minerals pyrite; stibiconite; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MM
Quadrangle map, 1:63,360-scale C-1
Latitude 63.741
Longitude -150.3853
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on the south bank of Stampede Creek at an elevation of about 2150 feet (White, 1942). It is in the SW1/4 SW1/4 section 36, T. 13 S, R. 15 W., Fairbanks Meridian. The location is probably accurate within 500 feet. The prospect corresponds to number 110 of Thornsberry, McKee and Salisbury (1984).

Geologic setting

Geologic description

The country rocks in the area of this prospect are calcareous muscovite schist and quartzite of the Birch Creek Schist (Thornsberry, McKee, and Salisbury, 1984, pl. K-4; White, 1942, pl. 49). The deposit consists of stibnite, partly oxidized to stibiconite, in quartz veins. Locally, the stibnite forms massive veins and lenses as much as 5 feet across. Pyrite locally accompanies the stibnite. A grab sample of the stibnite contained 19 percent antimony, but essentially no gold or other valuable metals.
Geologic map unit (-150.387598320213, 63.7405095427277)
Mineral deposit model Simple Sb deposit (Cox and Singer, 1986; model 27d).
Mineral deposit model number 27d
Age of mineralization The deposit is assumed to be Eocene (see record MM091).
Alteration of deposit Partial oxidation of stibnite to stibiconite.

Production and reserves

Workings or exploration The prospect was explored by one small cut excavated in 1941 or earlier (White, 1942). Exposures in the area are poor.
Indication of production Undetermined

Additional comments

The prospect is in Denali National Park and Preserve.

References