Unnamed (north of Mathews Dome)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Cu
Ore minerals malachite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-3
Latitude 67.4766
Longitude -151.4908
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is about 0.6 mile north of the summit of Mathews Dome. It is at an elevation of about 4,000 feet near the southwest corner of section 25, T. 31 N., R. 18 W., of the Fairbanks Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of traces of malachite in quartz veins and schist (Chipp, 1972). Selected grab sample of schist contain 2.1% copper and 14.0 ppm silver. A sample of vein quartz contained no anomalous values. (Samples 501 and 502 of Dillon and others (1981 [AOF 133B]) are the same as samples 136 and 137 of Chipp (1972) that are cited above.). The rocks in the area are Devonian phyllite, schist, and subordinate limestone or dolomite (Chipp, 1972).
Geologic map unit (-151.493549811494, 67.4761488885673)
Alteration of deposit Oxidation of copper mineral.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

Additional comments

See also Mathews Dome (WI086).