Unnamed (southwest of VABM Canwell)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Pb
Other commodities Au
Ore minerals azurite; chalcopyrite; galena; malachite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale B-4
Latitude 63.3284
Longitude -145.6909
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 4,200 feet about 0.4 mile southwest of VABM Canwell, near the northwest end of Rainbow Ridge. It is in the SW1/4NW1/4 section 29, T. 18 S., R. 11 E., Fairbanks Meridian. The occurrence is locality 4 of Hanson (1963), locality 19 of Cobb (1979 [OFR 79-238]), and locality S106 in table 2 of Nokelberg and others (1991).

Geologic setting

Geologic description

At this locality, small quartz veins containing pyrite, chalcopyrite, and galena are stained with malachite and azurite (Hanson, 1963). The veins vary in attitude and cut sedimentary, volcanic, and dacite intrusive rocks of the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991). Sulfide minerals are also disseminated in metatuff near a dacite intrusion (Nokleberg and others, 1991). Selected samples assayed 9.9 to 10.0 percent copper, 0.4 to 0.5 percent lead, and traces of gold and silver (Hanson, 1963). Grab samples collected by the U.S. Geological Survey assayed 10 percent copper, 0.5 percent lead, and a trace of gold (Nokleberg and others, 1991).
Geologic map unit (-145.693153420052, 63.3279876035858)
Mineral deposit model Polymetallic veins; Porphyry Cu (Cox and Singer, 1986; model 22c, model 17).
Mineral deposit model number 22c, 17
Age of mineralization Permian (?) or younger.
Alteration of deposit Oxidation of copper minerals.

Production and reserves

Workings or exploration
Selected samples assayed 9.9 to 10.0 percent copper, 0.4 to 0.5 percent lead, and traces of gold and silver (Hanson, 1963). Grab samples collected by the U.S. Geological Survey assayed 10 percent copper, 0.5 percent lead, and a trace of gold (Nokleberg and others, 1991).
The occurrence is on active claims of Northeast Exploration.
Indication of production None

References