Unnamed (northwest of Lake Selby)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Zn
Ore minerals azurite; chalcopyrite; malachite
Gangue minerals limonite; quartz

Geographic location

Quadrangle map, 1:250,000-scale HU
Quadrangle map, 1:63,360-scale D-6
Latitude 66.886
Longitude -155.7765
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located between Killak River and Lake Selby, about 3.5 miles north-northwest of the high point of land between Lake Selby and Narvak Lake and 3.5 miles southeast of Coal Pass. It is at an elevation of about 1,950 feet, 0.2 mile southwest of the center of section 10, T. 17 N., R. 14 E. of the Kateel River Meridian. Location is accurate within one-half mile.

Geologic setting

Geologic description

This occurrence consists of a copper-bearing quartz vein in Cretaceous conglomerate (Patton and Miller, 1966). The vein contains chalcopyrite, and is stained with malachite, azurite, and limonite. The conglomerate borders pre-Cretaceous volcanic and metamorphic rocks, and the conglomerate is cut by a small, plug-like body of andesite porphyry. A rock sample contains more than 10% copper, 0.05% zinc, traces of cobalt, chromium, and nickel, 0.01 ounce of silver per ton, and no detectable gold. No other information is available.
Geologic map unit (-155.77920147062, 66.8854646324832)
Age of mineralization Cretaceous or younger.
Alteration of deposit Oxidation of chalcopyrite to secondary copper and iron minerals.

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

References