Unnamed (west of Wind River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Pb; Zn
Ore minerals galena; sphalerite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale PS
Quadrangle map, 1:63,360-scale B-1
Latitude 68.31
Longitude -147.58
Nearby scientific data Find additional scientific data near this location
Location and accuracy Site is at an elevation of about 4,800 ft. on the north side of a large, east-southeast-flowing tributary to the upper Wind River about 5 miles north-northeast of the head of Beaucoup Creek (SE1/4 sec. 18, T. 13 S., R. 20 E., of the Umiat Meridian) and approximately 2 miles northwest of the Occasional Group (PS011). Location accurate within 1-mile radius.

Geologic setting

Geologic description

Visible sphalerite and galena occur in a stratabound quartz-calcite vein (Menzie and others, 1985). The vein cuts black, recrystallized chert and chert breccia which is found at the top of the Devonian Skajit Limestone. Barker (1978) reported sulfides as disseminated crystals and veinlets in limestone and dolomite in creek rubble. Anomalous values of silver, arsenic, antimony and cadmium were noted in rock samples from this location. The bedrock is mapped as Skajit Limestone in contact with calcareous sandstone member of Hunt Fork Shale and/or Beaucoup Formation. No other descriptive information is available.
Geologic map unit (-147.582785839917, 68.3096578280676)
Mineral deposit model Polymetallic replacement deposit? (Cox and Singer, 1986; model 19a?).
Mineral deposit model number 19a?

Production and reserves

Workings or exploration The maximum values from 7 rock samples from this area are: 300 ppm Cu, 500 ppm As, 100 ppm Sb, 7 ppm Ag, [more than] 500 ppm Cd (Cathrall and others, 1977; sample number 75 RR 113 A through E, S, and T).
Indication of production None

References