| Quadrangle map, 1:250,000-scale | HW |
|---|---|
| Quadrangle map, 1:63,360-scale | B-1 |
| Latitude | 68.2576 |
| Longitude | -156.4527 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This occurrence is about 2.4 miles east-southeast of the summit of Kivliktort Mountain in the headwaters of a small unnamed stream; it is about 0.1 mile southwest of the center of section 13, T. 33 N., R. 10 E. |
Geologic descriptionThe rocks in the area are Upper Devonian to Lower Mississippian, Noatak Sandstone overlain by Kanayut Conglomerate. The rocks are thrust faulted and some of the mineralization is along a thrust surface. Float of mineralized, brecciated, quartz-cemented sandstone occurs along a small creek (Kurtak and others, 1995). A sample contained 19.6 percent zinc, 1,062 parts per million (ppm) cadmium, and 394 ppm copper. At an elevation of about 800 meters along the creek, quartz-cemented sandstone rubble over an area about 5 meters by 15 meters contained up to 4.3 percent lead and 82.6 ounces of silver per ton. A rubble sample of iron-stained conglomerate at the head of the creek contained 0.4 percent zinc. | |
| Geologic map unit | (-156.455604779892, 68.257094951224) |
|---|---|
| Mineral deposit model | Sandstone lead-zinc deposit? |
| Age of mineralization | Late Devonian or younger based on the age of the host rock; possibly Mississippian by analogy with other lead-zinc deposits in the western Brooks Range. |
| Alteration of deposit | Probably some silicification in addition to quartz veining. |
| Workings or exploration | Only sampling and mapping by the U.S. Bureau of Mines. |
|---|---|
| Indication of production | None |
| Reserve estimates | None. |
| Production notes | None. |
Additional commentsMAS number 0020200014. | |
| MRDS Number | A106120 |
|---|---|
References | |
| Reporters | J.H. Dover (U.S. Geological Survey); D.J. Grybeck (Contractor, U.S. Geological Survey) |
| Last report date | 4/18/2010 |