Kalvich Area Occurrence, Noatak Mining District, Northwest Arctic Borough, Alaska, USAi

Regional Level Types
Kalvich Area Occurrence	Occurrence
Noatak Mining District	Mining District
Northwest Arctic Borough	Borough
Alaska	State
USA	Country

This occurrence is one of several small skarn zones at granitic contacts through out the Ambler River quadrangle (Degenhart and others, 1978). Located in the Noatak National Preserve.
Location: Located in the Baird Mountains on ridge near Peak 3475 in T. 25 N., R. 3 E., Kateel River Meridian. Shown as locality 6 in Mayfield and Grybeck (1978) and is accurate to within 2000 ft. (600 m).
Geology: Disseminated pyrite, galena, fluorite and malachite in Kalvich pluton along contact zone. Deposit is 1 mi (1.6 km) in strike length. Visual estimate of 1% galena and 1% fluorite in granitic rock along north margin of pluton. About 8 sq. mi. (13 sq km0 of the surrounding area is geochemically anomalous in Pb and Zn. n. The Kalvich pluton is in contact with black siltstone interbedded with marble and quartz-mica schist to the north and east and with gray to black marble of the Skajit limestone to the south and west. The northern margin of the pluton is a migmatitic contact zone containing moderately anomalous Pb, Zn, Mo, Sn and W (Degenhart and others, 1978, p. 340-350).
Workings: A representative bedrock chip sample from a 100 ft. by 7 ft. (33 m x 2 m) area of highly foliated fine grained intrusive rock yielded 86 ppm Cu, 2000 ppm Pb, 94 ppm Zn, 53 ppm Mo, 14 ppm Ag, 34 ppm Sn, 1400 ppm F (Degenhart and others, 1978, p. 340-350).
Reserves: The possibility of even a small tonnage of economic grade material being discovered is remote.

Commodities (Major) - F, Pb; (Minor) - Cu, Mo, Sn, W, Zn
Development Status: No
Deposit Model: Skarn

Other Databases

Link to USGS - Alaska:	AR047

Other Regions, Features and Areas containing this locality

References