Unnamed (near Mettenpherg Creek)

Occurrence, Inactive

Commodities and mineralogy

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

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-6
Latitude 67.2902
Longitude -152.8755
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is approximately 4 miles west of upper Mettenpherg Creek, at an elevation of about 1,120 meters, in the SE /4 SE1/4 section 34, T. 29 N., R. 24 W., of the Fairbanks Meridian. The location is accurate within one-half mile.

Geologic setting

Geologic description

This occurrence consists of stratabound(?), disseminated to massive magnetite and pyrite, with minor galena, in sericitic dolomite (Kurtak and others, 2002). The mineralization occurs in bands up to 4 feet thick that can be traced for 100 to 150 feet along strike. The occurrence also includes malachite-stained, dolomite breccia that contains minor chalcopyrite. Mineralized float with pyrite, galena, and sphalerite occurs in streams that drain this occurrence. The rocks in the area are principally gray marble, interbedded with dolomite, quartzite, and greenstone (Kurtak and others, 2002).
Geologic map unit (-152.878255889838, 67.2897261501724)
Alteration of deposit Local oxidation of copper mineral.

Production and reserves

Workings or exploration Surface mapping and sampling.
Indication of production 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)
Last report date 8/9/2002