Tierra Blanca Mining District

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

Information leading to the delineation of this focus area

Basis for focus area Mining district outlines from McLemore (2017).
Identified resources Historical production of copper, gold, lead, silver, tungsten, and zinc (see McLemore, 2017).
Production Silver Tail mine: about 5 tons of ore assaying 4% WO3 shipped in 1942; 50 tons of ore assaying 3% WO3 shipped in 1955.
Status Past mining and exploration.
Estimated resources Unknown.
Geologic maps Seager and others (1982), scale 1:125,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Middle Tertiary rhyolites in contact with Paleozoic limestone and dolomite.
Deposits Silver Tail mine (MRDS dep_id: 10011711), Bromide mine (MRDS dep_id: 10099716), Percha, Tierra Blanca.
Evidence from mineral occurrences MRDS.
Geochemical evidence Samples contained up to 2020 ppb Au, up to 1310 ppm W, and up to 2800 ppm Te (see https://geoinfo.nmt.edu/staff/mclemore/projects/mining/REE/McLemoreMasterChem_v5.xlsx).
Geophysical evidence None.
Evidence from other sources Unknown.
Cover thickness and description Variable.
Authors Virginia T. McLemore.
New data needs Geologic mapping, chemical and mineralogical analyses, geophysics.
Geologic mapping and modeling needs Geologic mapping needed.
Geophysical survey and modeling needs High resolution, Rank 1 aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar complete.