Kalvich Area

Occurrence, Inactive

Commodities and mineralogy

Main commodities F; Pb
Other commodities Cu; Mo; Sn; W; Zn
Ore minerals galena; fluorite; malachite

Geographic location

Quadrangle map, 1:250,000-scale AR
Quadrangle map, 1:63,360-scale C-5
Latitude 67.56
Longitude -158.2
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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).

Geologic setting

Geologic description

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 percent galena and 1 percent fluorite in granitic rock along north margin of pluton. About 8 sq. mi. (13 sq km) of the surrounding area is geochemically anomalous in Pb and Zn. 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).
Geologic map unit (-158.202848262142, 67.5594434344424)
Mineral deposit model Skarn (Cox and Singer, 1986; model 18c).
Mineral deposit model number 18c

Production and reserves

Workings or exploration A representative bedrock chip sample from a 100 ft. by 7 ft. (33 m by 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).
Indication of production None
Reserve estimates The possibility of even a small tonnage of economic grade material being discovered is remote.

Additional comments

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.


MRDS Number A011855
Reporters K.R. Leonard (USGS), R.L. Elliott (USGS), J.M. Schmidt (USGS)
Last report date 10/26/1992