Tutsagubet Mining District (Apex mine)

Region West, Southwest
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

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.