Unnamed Occurrence (ARDF - CA022; on Weather Ridge), Fairhaven Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - CA022; on Weather Ridge)	- not defined -
Fairhaven Mining District	Mining District
Northwest Arctic Borough	Borough
Alaska	State
USA	Country

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.
Location: This occurrence is at an elevation of about 1,750 feet, 0.2 miles southeast of point 1453 on Weather Ridge. The site is in section 18, T. 1 N., R. 13 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 9, and Miller and Elliott (1969), figure 2, sample location 22.
Geology: This occurrence consists of a galena-bearing calcite vein 1 foot thick that cuts Jurassic-Cretaceous altered andesitic volcanic rocks near the contact with quartz monzonite of the Late Cretaceous Quartz Creek pluton. The alteration is marked by quartz-carbonate replacement, and tourmaline (also see Additional comments). A grab sample of the vein contained: 20 ppm Ag, 200 ppm Cu, 1.5% Pb, and 700 ppm Zn (Miller and Elliott, 1969).
Workings: The area has been mapped and examined by the U.S. Geological Survey and by various exploration companies.
Age: Late Cretaceous.
Alteration: Quartz-carbonate replacement and tourmaline.

Commodities (Major) - Ag, Pb
Development Status: None
Deposit Model: Sulfides in altered quartz monzonite.

Other Databases

Link to USGS - Alaska:	CA022

Other Regions, Features and Areas containing this locality

References