| Quadrangle map, 1:250,000-scale | FB |
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| Quadrangle map, 1:63,360-scale | D-2 |
| Latitude | 64.949 |
| Longitude | -147.533 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | The Tungsten Hill propsect is located in the NW1/4 sec. 3, T. 1 N., R. 1 E., Fairbanks Meridian. This prospect is on the southwest side of Tungsten Gulch, a tributary of First Chance Creek. It is about 0.2 mile north of the top of Mount Lulu Fairbanks and about 2.5 miles east of the town of Fox. The prospect is included in locality 27 of Cobb (1972 [MF 410]). |
Geologic descriptionBy 1916, four zones as much as 14 feet wide that contained scheelite had been discovered on the western periphery of a large granite body (Mertie, 1917, p. 422-424). Scheelite occurs in tactite, silicified limestone, granite and pegmatitic dikes, and in small quartz veins in schist (Berg and Cobb, 1967). Samples of high-grade ore on the dump assayed 8 percent tungsten trioxide (WO3) (Joesting, 1943 [ATDM Pamph. 2]). This prospect is near the contact of a Cretaceous porphyritic granite and Fairbanks Schist that consists of quartz-muscovite schist, quartzite, and chloritic-quartz schist (Newberry and others, 1996). | |
| Geologic map unit | (-147.535434711829, 64.9485737363652) |
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| Mineral deposit model | W skarn deposit (Cox and Singer, 1986; model 14a) |
| Mineral deposit model number | 14a |
| Workings or exploration | By 1916, several zones that contained scheelite were located. On the Grand Duke Nikolas claim, a scheelite lode in schist was exposed in an open cut. On the Tungsten No. 1 claim, another open cut had been made in schist and quartzite schist that included a zone with scheelite. The width of the mineralized zone was not apparent. On the General Joffre claim, a lode 14 feet wide with scheelite has been exposed. This deposit as a whole was considered low-grade ore (Mertie, 1917, p. 422-424). In 1943, Joesting (1943 [ATDM Pamph. 2]) reported that little work had been done since 1918. |
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| Indication of production | Undetermined |
| Production notes | No record of production. |