Unnamed (near Kiwalik River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities W
Other commodities Cu; Pb
Ore minerals pyrite; scheelite
Gangue minerals quartz; tourmaline

Geographic location

Quadrangle map, 1:250,000-scale CA
Quadrangle map, 1:63,360-scale B-5
Latitude 65.47
Longitude -161.48
Nearby scientific data Find additional scientific data near this location
Location and accuracy Occurrence is 0.1 mile southwest of peak 1380 on Weather Ridge. The site is in section 24, T. 1 N., R. 14 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 6, and Miller and Elliott (1969), figure 2, sample location 36.

Geologic setting

Geologic description

This occurrence is located adjacent to the mid-Cretaceous Quartz Creek pluton, a hook-shaped, quartz monzonite body. The pluton is surrounded by a N 15 W-trending alteration zone about 18 miles long and 2 to 5 miles wide. The alteration zone is in Jurassic-Cretaceous andesitic volcanic rocks, and is marked by carbonate-quartz replacement, and tourmaline. Fine-grained dikes of varying composition cut the andesites near the pluton. Dikes near the Quartz Creek pluton are locally mineralized. At this occurrence, disseminated scheelite occurs in pyrite-tourmaline-quartz vein material in frost-riven rubble near the contact between andesite and quartz monzonite. A grab sample from location 36 contained 500 ppm Cu, 150 ppm Pb, and greater than 1% W (Miller and Elliott, 1969).
Geologic map unit (-161.482642383737, 65.4693238302852)
Mineral deposit model Scheelite in pyrite-tourmaline-quartz veins.
Age of mineralization Mid-Cretaceous or younger.
Alteration of deposit Tourmaline alteration along closely spaced fractures.

Production and reserves

Workings or exploration The area has been mapped by the U.S. Geological Survey and examined by various exploration companies.
Indication of production None

Additional comments

This site is one of numerous occurrences of argentiferous galena, sphalerite, pyrite and arsenopyrite in an 18-mile-long, 2- to 5-mile-wide zone of altered andesite surrounding the Quartz Creek quartz monzonite pluton. The altered zone trends N 15 W, across the drainage basins of Quartz Creek and the Kiwalik River.