| Main commodities | Cu |
|---|---|
| Other commodities | Ag |
| Ore minerals | chalcopyrite; malachite |
| Gangue minerals | quartz |
| Quadrangle map, 1:250,000-scale | AR |
|---|---|
| Quadrangle map, 1:63,360-scale | C-6 |
| Latitude | 67.69 |
| Longitude | -158.89 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | Located along Natmotirak Creek in T. 26 N., R. 1 W., Kateel River Meridian. Shown as locality 3 in Mayfield and Grybeck (1978) and is accurate to within 2000 ft. (600 m). |
Geologic descriptionVisible chalcopyrite and malachite in less than 3 ft. (1 m) wide quartz vein cutting limestone (Mayfield and Grybeck, 1978). Occurrence could be similar to several other sediment-hosted occurrences in the Brooks Range that formed from the dewatering of a large sedimentary basin (Schmidt, 1997, p. 35-65; Schmidt and Werdon, 1993, p. 143). | |
| Geologic map unit | (-158.892878420152, 67.6894247679292) |
|---|---|
| Mineral deposit model | Sediment-hosted Pb-Zn (Cox and Singer, 1986; model 31a)? |
| Mineral deposit model number | 31a? |
| Age of mineralization | Paleozoic? |
| Workings or exploration | 10 ppm Ag in one rock sample (Mayfield and Grybeck, 1978). |
|---|---|
| Indication of production | None |
Additional commentsLocated within Noatak National Preserve. | |
| MRDS Number | A011852 |
|---|---|
| Reporters | K.R. Leonard (USGS), R.L. Elliott (USGS), J.M. Schmidt (USGS), S.W. Nelson (USGS retired) |
| Last report date | 5/8/1997 |