Zinc

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Au; Pb; Zn
Other commodities As
Ore minerals fluorite; galena; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-6
Latitude 67.3978
Longitude -152.6955
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is about 3.2 miles north-northeast of the junction of Pass and Mettenpherg Creeks. The occurrence is at an elevation of about 780 meters, about 0.3 mile northeast of the center of section 28, T. 30 N., R. 23 W. The location is accurate.

Geologic setting

Geologic description

The rocks in the area consist of Proterozoic(?) granite gneiss and banded schist, and Devonian Skajit Limestone (Dillon and others, 1986) This occurrence was reported to consist of sphalerite and galena in carbonate rocks (Grybeck, 1977). Kurtak and others (2002) investigated the site but only found blocks of limonite-stained schist with up to 2 percent fluorite and stringers of pyrite at a contact of Skajit Limestone and quartz-sericite schist. A select sample contained 67 parts per billion gold and 131 parts per million arsenic. Kurtak and others (2002) reported that 106 lode claims were staked over the property in 1975 but found no evidence of workings.
Geologic map unit (-152.698262177447, 67.3973320694474)
Mineral deposit model Insufficient evidence to assign.
Age of mineralization Devonian or younger based on the age of the host rocks.
Alteration of deposit None noted.

Production and reserves

Workings or exploration 106 lode claims were staked in 1975.
Indication of production None
Reserve estimates None.
Production notes None.

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); D.J. Grybeck (Contractor, USGS)
Last report date 2/1/2011