Unnamed (in divide at head of Quartz Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Ore minerals argentiferous galena; pyrite; sphalerite
Gangue minerals calcite; tourmaline

Geographic location

Quadrangle map, 1:250,000-scale CA
Quadrangle map, 1:63,360-scale B-5
Latitude 65.49
Longitude -161.34
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,250 feet near the divide at the head of Quartz Creek. The site is in section 15, T. 1 N., R. 13 W., of the Kateel River Meridian. Miller and Elliott (1969), figure 2, location 27.

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. This occurrence is a sulfide-bearing, oxidized carbonate zone in altered andesite. A composite grab sample contained: 200 ppm Ag (5.8 ounces Ag per ton), greater than 500 ppm Cd, 200 ppm Cu, greater than 2% Pb, and greater than 1% Zn (Miller and Elliott, 1969, location 27).
Geologic map unit (-161.342643529204, 65.489327033185)
Mineral deposit model Sulfides in altered andesite.
Age of mineralization Late Cretaceous.
Alteration of deposit Carbonate-quartz replacement and tourmaline.

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, parallel to prominent lineaments in the area.