Unnamed Occurrence (ARDF - CA011; at south end of Gossan Ridge), Fairhaven Mining District, Nome Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - CA011; at south end of Gossan Ridge)	- not defined -
Fairhaven Mining District	Mining District
Nome Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is at an elevation of about 700 feet on the south end of Gossan Ridge. The site is in section 9, T. 1 S., R. 13 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 13, and Miller and Elliott (1969), figure 2, sample location 45.
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 oxidation, quartz-carbonate replacement, and tourmaline. Fine-grained dikes of varying composition cut the andesites near the pluton. Dikes near the Quartz Creek pluton locally contain sulfide minerals. Talus from the area contained disseminated galena in oxidized quartz-carbonate rock. A sample of the talus contained 1500 ppm As, 0.04 ppm Au, 300 ppm Cu, and 150 ppm Pb. Another grab sample contained 3,000 ppm Cr, 7,000 ppm Pb, and 10,000 ppm Zn (Miller and Elliott, 1969).
Workings: The area was discovered by the U.S. Geological Survey in the late 1960's (Miller and Elliott, 1969). It has has been mapped and examined by the U.S. Geological Survey and by various exploration companies. Numerous occurrences of argentiferous galena, sphalerite, pyrite and arsenopyrite occur in an 18 mile long, 2- to 5-mile-wide altered zone surrounding the Quartz Creek quartz monzonite pluton. The alteration of the andesite trends N 15 W across the drainage basins of Quartz Creek and the Kiwalik River.
Age: Quaternary.
Alteration: Oxidation, quartz-carbonate replacement, and tourmaline.

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

Other Databases

Link to USGS - Alaska:	CA011

Other Regions, Features and Areas containing this locality

References