| Basis for focus area |
Tungsten veins, modified from district outline from USMIN. |
| Identified resources |
Historical production of tungsten. |
| Production |
Germania mine (1904-1907, 1910-1913, 1931-1936, 1936-1941: 88,354 metric tons with grade 1.71% WO3, for a calculated production of 440 metric tons W. Produced 90% of all W shipped from Washington state in the 1940-1950s (Wolff and others, 2014). |
| Status |
Past mining. |
| Estimated resources |
Unknown. |
| Geologic maps |
Smith (1991), scale 1:24,000; Campbell and Raup (1964), scale 1:48,000; Washington Division of Geology and Earth Resources (2016), scale 1:100,000. |
| Geophysical data |
Inadequate aeromagnetic and aeroradiometric coverage, poor gravity. |
| Favorable rocks and structures |
Cretaceous two-mica and acidic granite intruding sedimentary rock formations of the Precambrian Deer Trail Group. |
| Deposits |
Germania mine (MRDS dep_id: 10042355; USMIN Site_ID: WA00007). |
| Evidence from mineral occurrences |
MRDS; USMIN. |
| Geochemical evidence |
Unknown. |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
Unknown. |
| Comments |
Mix of state lands (mineral leases), BLM, and private ownership. Parts of both ends of the focus area are on tribal lands, and so are a low priority for Washington state. |
| Cover thickness and description |
Unknown. |
| Authors |
Daniel W. Eungard. |
| New data needs |
High resolution mapping, geophysics, and partial lidar. |
| Geologic mapping and modeling needs |
Partial mapping of three to four quadrangles at 1:24,000 scale or better resolution. |
| Geophysical survey and modeling needs |
Need high resolution aeromagnetic and aeroradiometric coverage, as it would key to identifying the system over this broad of area and delineating possible deposits at depth. Gravity would not be helpful with the similarity between the host/intrusive rock types. |
| Digital elevation data needs |
Lidar complete for all but most northern section. |
