Eli River; Agashashok River Occurrence, Noatak Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Eli River; Agashashok River Occurrence	Occurrence
Noatak Mining District	Mining District
Northwest Arctic Borough	Borough
Alaska	State
USA	Country

Location: This occurrence is at an elevation of about 2,200 feet, approximately 1.7 miles north of the headwaters of the Agashashok River. It is in section 20, T. 26 N., R. 12 W., of the Kateel River Meridian. Cobb (1972, MF-386), location 1, and Schmidt and Allegro (1988), location 72.
Geology: The bedrock in this area is Devonian Skajit limestone, dolomite, marble, and minor gray phyllite (Schmidt and Allegro, 1988). The carbonates are cut by small quartz stringers containing small amounts of sulfides. A large quartz boulder contained small blebs of chalcopyrite, along with minor malachite. The quartz assayed 0.48% Cu. Other rock samples collected in the area returned no significant metal values (Degenhart and others, 1978). A quartz sample containing pyrite collected by the U.S. Geological Survey contained 100 ppm As, 4 ppm Sb, 3 ppm Ag, 3000 ppm Cu, 200 ppm La, 300 ppm Ni, and 30 ppm Pb (Schmidt and Allegro, 1988).
Workings: Six stream silt samples and one rock sample were collected during a U.S. Bureau of Mines investigation of the area in 1978 (Degenhart and others, 1978). The U.S. Geological Survey also visited and sampled the occurrence (Schmidt and Allegro, 1988).
Age: Devonian?

Commodities (Major) - Cu
Development Status: None
Deposit Model: Sulfide-bearing quartz veins cutting Paleozoic limestone.

Other Databases

Link to USGS - Alaska:	BM016

Other Regions, Features and Areas containing this locality

References