Tana

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Other commodities Cu
Ore minerals chalcopyrite; galena; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-6
Latitude 67.3308
Longitude -152.5135
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 1,000 meters, just above the center of the southern boundary of section 17, T. 29 N., R. 23 W., of the Fairbanks Meridian. The location is accurate.

Geologic setting

Geologic description

This prospect consists of oxidized, sulfide-bearing blocks of talus (Kurtak and others, 2002). The talus is distributed along two northwest-trending linear zones that are roughly parallel to the strike of underlying Devonian, Skajit Limestone. The sulfides occur in the matrix of dolomite breccia, and consist predominately of sphalerite with smaller amounts of galena and pyrite, and traces of chalcopyrite. A composite sample of the talus contains 4.4% lead, 6.7% zinc , and 4.03 ounces of silver per ton. (Kurtak and others, 2002).
Geologic map unit (-152.516251618082, 67.3303318696673)
Mineral deposit model Polymetallic replacement deposit? (Cox and Singer, 1986; model 19a?).
Mineral deposit model number 19a?
Alteration of deposit The sulfides are oxidized to limonitic gossan.

Production and reserves

Workings or exploration Kurtak and others (2002) report that mining claims were located in 1977 and surface mapping, trenching, and soil sampling were done in 1978.
Indication of production None

Additional comments

See also: Frog (WI044).

References

References

Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska: Final Report: U.S. Bureau of Land Management Technical Report 50, v. 1 and 2, 845 p.
Reporters J.M. Britton (Anchorage)
Last report date 8/9/2002