| Basis for focus area |
Tutsagubet mining district boundary from Krahulec (2018b). |
| Identified resources |
Indicated resources of gallium, germanium, and silver. Historical production of copper, gallium, germanium, gold, lead, silver, and zinc. |
| Production |
7900 tons Cu, 475 tons Pb, 11 tons Zn, and 180,000 troy oz Ag, along with minor amounts of Au (Wenrich and Verbeek, 2014); 1645 lbs Ga and 5634 lbs Ge (Krahulec, 2018b). |
| Status |
Past mining; area now reclaimed. |
| Estimated resources |
1 million tons averaging 0.033% Ga, 0.087% Ge, 1.8% Cu, and 41 ppm Ag (Krahulec, 2018b). |
| Geologic maps |
Hammond (1991), scale 1:24,000; Hayden and others (2005a, b), scale 1:24,000; Hintze and Hammond (1994), scale 1:24,000. |
| Geophysical data |
Inadequate Rank 4 aeromagnetic coverage. |
| Favorable rocks and structures |
Collapse breccia of Pennsylvanian Callville Limestone and Pakoon Dolomite into Mississippian Redwall Limestone. |
| Deposits |
Apex mine (MRDS dep_id: 10276875). |
| Evidence from mineral occurrences |
MRDS; UMOS (Utah Geological Survey, 2021). |
| Geochemical evidence |
Wenrich and Verbeek (2014), Krahulec (2018b). |
| Geophysical evidence |
Unknown. |
| Evidence from other sources |
See Krahulec (2018b). |
| Comments |
Apex mine is a Kipushi-type deposit historically mined for Cu, Zn, Ag. Ga and Ge in jarosite and limonite; no primary Ga or Ge minerals. Closed in 1987 and subsequently reclaimed. |
| Cover thickness and description |
Variable; Apex was an underground mine. |
| Authors |
Jane M. Hammarstrom. |
| New data needs |
Aeromagnetic and aeroradiometric surveys; existing 1:24,000 scale mapping digitized. |
| Geologic mapping and modeling needs |
Map digitization. |
| Geophysical survey and modeling needs |
High-resolution, Rank 1 aeromagnetic and radiometric surveys. |
| Digital elevation data needs |
Lidar inadequate; could define mine waste and tailings under reclamation for examination of mining waste potential. |
