| 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 descriptionDisseminated 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 |
| 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 commentsThis 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 |