Unnamed (southwest of Turn Mountain)

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Ba; Pb; Zn
Ore minerals barite; galena; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale SD
Quadrangle map, 1:63,360-scale A-6
Latitude 57.03894
Longitude -133.89459
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrences is about 2.8 miles southwest of Turn Mountain along a logging road. It is about 0.5 mile north of the center of section 12, T. 56 S., R. 72 E.

Geologic setting

Geologic description

This occurrences was discovered by Still and others (2002). A lens of massive barite about 2 feet thick and 6 feet long is exposed in soil above a logging road. The barite contains scattered galena and sphalerite. A select sample contained 13.1 parts per million silver, 1.02 percent lead, 2.0 percent zinc, and 48.37 percent barium. The rocks in the area are mainly argillite of the Hyd Group of Triassic age (Karl and others, 1999).
Geologic map unit (-133.896318595623, 57.0386034024817)
Mineral deposit model Volcanogenic massive sulfide deposit? (Cox and Singer, 1986, model 28a).
Mineral deposit model number 28a?
Age of mineralization Unclear but associated with rocks of Triassic age.

Production and reserves

Workings or exploration None; the only work has been surface sampling by government geologists.
Indication of production None

References

References

Still, J.C., Bittenbender, P.E., Bean, K.W., and Gensler, E.G., 2002 Mineral assessment of the Stikine area, central Southeast Alaska: U.S. Bureau of Land Management Technical Report 51, 560 p.
Reporters Donald Grybeck (U.S. Geological Survey)
Last report date 10/8/2004