Unnamed (upper Crevice Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities As; Cu
Other commodities Co; Pb; V; Zr
Ore minerals chalcopyrite; malachite

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-4
Latitude 67.355
Longitude -151.8251
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is along the north fork of upper Crevice Creek about 5.5 miles east of the junction of Crevice Creek and John River. The occurrence is on the north side of the creek at an elevation of about 1,700 feet, about 0.6 mile northeast of the center of section 9, T. 29 N., R. 19 W., of the Fairbanks Meridian. The occurrence is the site of sample 257 of Dillon and others (1981 [AOF 133B]). The location is accurate.

Geologic setting

Geologic description

This occurrence consists of malachite-stained, calcareous, muscovite-quartz schist that contains fine-grained, disseminated chalcopyrite (Dillon and others, 1981 [AOF133B]). A sample of schist contains 2,000 ppm copper, 500 ppm arsenic, 300 ppm cobalt, 200 ppm lead, 1,000 ppm vanadium, and 500 ppm zircon. The rocks in the area are Middle or Upper Devonian(?) chloritic and carbonate units (Dillon and others, 1986).
Geologic map unit (-151.827840188476, 67.3545401339204)

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None