Unnamed Occurrence (ARDF - CA019; near Kiwalik River), Fairhaven Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - CA019; near Kiwalik River)	- 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.
Location: 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.
Geology: 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).
Workings: The area has been mapped by the U.S. Geological Survey and examined by various exploration companies.
Age: Mid-Cretaceous or younger.
Alteration: Tourmaline alteration along closely spaced fractures.

Commodities (Major) - W; (Minor) - Cu, Pb
Development Status: None
Deposit Model: Scheelite in pyrite-tourmaline-quartz veins.

Other Databases

Link to USGS - Alaska:	CA019

Other Regions, Features and Areas containing this locality

References