Unnamed (south of Pet Lake)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu
Other commodities Mo; Pb; Sc; Ti; V; Zn
Ore minerals bornite; chalcopyrite; galena; malachite; sphalerite
Gangue minerals hematite; quartz

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale C-4
Latitude 67.5928
Longitude -151.9021
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 4,350 feet, about 0.2 mile southeast of peak 4816, near the southeast corner of section 13, T. 32 N., R. 20 W., of the Fairbanks Meridian. The location is accurate within about one-half mile.

Geologic setting

Geologic description

This occurrence is one of several that define a northeast trending zone of minor copper occurrences that extends northeast for about 5 miles from VABM Allen on the Wiseman C-5 topographic map (also see WI005, 006, 013, 014, and 016). This occurrence was first described by Brosge and Reiser (1960) as copper sulfides, galena and malachite in a quartz vein in Devonian phyllite and siltstone below a thrust plate of Devonian Skajit Limestone. Nearby, Dillon and others (1981, localities 244 and 245 [AOF 133B]) sampled mineralized pebble conglomerate and cross-bedded metasandstone near a facies change from metaclastic to metacarbonate rocks. The pebble conglomerate was malachite-stained and contained disseminated chalcopyrite, sphalerite, and galena. The metasandstone contained sphalerite and abundant hematite. Samples from these two units contain up to 7,000 ppm copper, 10 ppm silver, more than 1% titanium, 70 ppm scandium, 700 ppm vanadium, 500 ppm zinc, and 100 ppm molybdenum. Kurtak and others (1999) collected two selected bedrock samples of micaceous schist and limestone and a sample of quartz-chlorite schist float that contains bornite, malachite, and possibly galena; one sample has 11% copper, 17 ppb gold, and 68.9 ppm silver.
Geologic map unit (-151.904857374327, 67.5923458437862)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?

Production and reserves

Workings or exploration Only surface sampling.
Indication of production None

Additional comments

See also WI014. This occurrence is located within Gates of the Arctic National Park.

References