| Basis for focus area |
Tungsten veins outline from USMIN location polygon NV00136. |
| Identified resources |
Identified resources and historical production of tungsten. |
| Production |
Scheelite Chief mine (1916-1956): 107,830 short tons WO3 (Stager and Tingley, 1988). |
| Status |
Past mining. |
| Estimated resources |
Scheelite Chief mine (1943): Indicated resource of 5,600 metric tons with a grade of 0.6% WO3 for a calculated contained of 33 metric tons W; Inferred resource of 15,000 metric tons with grade of 0.71% WO3 for a calculated contained of 86 metric tons W; Measured resource of 1 1944), 100 metric tons with grade of 0.75% WO3 for calculated contained of 6.5 metric tons W (Lemmon, 1944). |
| Geologic maps |
Rowley and others (2017), scale 1:250,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage. |
| Favorable rocks and structures |
Scheelite occurs in ore shoots in quartz veins that cut through Cambrian limestone. |
| Deposits |
Scheelite Chief mine (MRDS dep_ids: 10037325, 10223428; USMIN Site_ID: NV00135), Canary Yellow mine (MRDS dep_id: 10246972), Everett mines (MRDS dep_id: 10046920), Hilltop mine (MRDS dep_id: 10197977), Lone Buck prospect (MRDS dep_id: 10046919), Oriole mine (MRDS dep_id: 10037324). |
| Evidence from mineral occurrences |
MRDS; USMIN. |
| Geochemical evidence |
Veins consist of quartz and calcite with some scheelite, and in spots, traces of tetrahedrite, galena, and powellite (Lemmon, 1944). |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Scheelite occurrences are in veins or stockworks with quartz or calcite, or both, as gangue. |
| Cover thickness and description |
Exposed at surface. |
| Authors |
John L. Muntean. |
| New data needs |
Geologic mapping, geophysics. |
| Geologic mapping and modeling needs |
Updated geologic mapping. |
| Geophysical survey and modeling needs |
High-resolution, Rank 1 aeromagnetic and aeroradiometric surveys. |
| Digital elevation data needs |
Lidar inadequate. |
