Unnamed (south of upper Seward Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; malachite; tetrahedrite; unspecified copper sulfides
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale C-4
Latitude 67.5084
Longitude -151.7514
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on a ridge about 1 mile south of the pass between the head of Seward Creek and the valley of Allen River. The occurrence is at an elevation of about 3,200 feet, about 0.5 mile east-southeast of the center of section 15, T. 31 N., R.15 W., of the Fairbanks Meridian. The location is accurate within one-half mile.

Geologic setting

Geologic description

Brosge and Reiser (1960) describe this occurrence as copper sulfides and malachite staining in Devonian phyllite and siltstone. Kurtak and others (2002) sampled an outcrop of dolomite in this area that contains about 1% pyrite, but an analysis showed no significant metal values. They note that this occurrence is similar to several other unspecified, small, podiform copper occurrences in the Wild Lake area. They are extremely small, podiform, and contain chalcopyrite, tetrahedrite, and/or malachite. No other information about this occurrence is available.
Geologic map unit (-151.754151128876, 67.5079450385535)
Alteration of deposit Local malachite staining.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References