Unnamed Occurrence (ARDF - CA018; north of Kiwalik River), Fairhaven Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - CA018; north of 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: The occurrence is located 35 miles southeast of Candle and 1.9 miles southwest of peak 1680 on Weather Ridge. This is in section 25, T. 1 N., R. 14 W., of the Kateel River Meridian. Miller and Elliot (1969), figure 2, sample location 37.
Geology: This occurrence is located adjacent to the mid-Cretaceous Quartz Creek quartz monzonite, a hook-shaped pluton that intrudes Jurassic-Cretaceous andesitic volcanic rocks. The pluton is surrounded by a N 15 W-trending alteration zone about 18 miles long and 2 to 5 miles wide. The altered volcanic rocks are marked by carbonate-quartz replacement, and possibly by tourmaline. A sample of gossan at the contact between quartz monzonite and andesite contained 1 ppm Au, 3,000 ppm As, 300 ppm Cu and 150 ppm Pb (Miller and Elliott, 1969, location 37).
Workings: The area has been mapped by the U.S. Geological Survey and examined by various exploration companies.
Age: Mid-Cretaceous or younger.
Alteration: Carbonate-quartz replacement and tourmaline?

Commodities (Major) - Au
Development Status: None
Deposit Model: Sulfides in altered andesite.

Other Databases

Link to USGS - Alaska:	CA018

Other Regions, Features and Areas containing this locality

References