Occurrence, Active
| Main commodities | Ag; Ni |
|---|---|
| Other commodities | Au; Cu |
| Ore minerals | pyrrhotite |
| Quadrangle map, 1:250,000-scale | MH |
|---|---|
| Quadrangle map, 1:63,360-scale | B-5 |
| Latitude | 63.3484 |
| Longitude | -146.0802 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This occurrence is at an elevation of 4,900 feet on the ridge between the locally named middle and east forks of the stream(s) in Broxson Gulch (see figure 2 of Rose, 1965). The occurrence is at the southeast corner of section 18, T. 18 S., R. 9 E, Fairbanks Meridian. This location corresponds to locality 20 on figure 2 of Rose (1965). |
Geologic descriptionThe rock at this site appears to be sandstone or quartzite of the Slana Spur Formation of Late Paleozoic age faulted into Upper Triassic peridotite (Rose, 1965). The deposit consists of pyrrhotite disseminated in sandstone. A sample assayed 0.2 percent nickel, 0.18 ounce of silver per ton, and small amounts of copper and gold (Rose, 1965, p. 31). Stream-sediment sample 284 collected below the occurrence contained 420 parts per million nickel (Rose, 1965). | |
| Geologic map unit | (-146.08246596274, 63.3479810430978) |
|---|---|
| Mineral deposit model | Pyrrhotite-bearing replacement? of sandstone in fault contact with mafic-ultramafic rocks. |
| Alteration of deposit | The sandstone apparently is hornfelsed to quartzite. |
| Workings or exploration | A sample contained 0.2 parts per million nickel. The occurrence is on active MAN Resources claims. |
|---|---|
| Indication of production | None |
| MRDS Number | A011817 |
|---|---|
References | |
| Reporters | W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS) |
| Last report date | 6/19/2001 |