Box Elder 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 Outline of Box Elder district from Krahulec (2018b).
Identified resources Historical production of antimony.
Production 1000 tons of Sb ore, minor polymetallic production.
Status Past mining.
Estimated resources Unknown.
Geologic maps Jensen and King (1999), scale 1:24,000; King (2018), scale 1:24,000.
Geophysical data Rank 2 aeromagnetic coverage (Langenheim, 2016); inadequate radiometric coverage.
Favorable rocks and structures Cambrian carbonates of the Blacksmith and Nounan Formations., Ordovician carbonates of the Garden City Formation.
Deposits Dry Lake Antimony mine (MRDS dep_id: 10088336), Baker mine (MRDS dep_id: 10098011, Cu-Pb-Ag), Copper Blossom mine (MRDS dep_id: 10015667, Cu-Pb-Zn-Ag).
Evidence from mineral occurrences MRDS; UMOS (Utah Geological Survey, 2021).
Geochemical evidence Antimony ore contains trace amounts of Cu, Pb, As, Ag, and Au.
Geophysical evidence Unknown.
Evidence from other sources See Krahulec (2018b), Mills and Rupke (2020).
Comments Dry Lake appears to have been the result of basin movement during the Sevier orogeny, based on its setting (faulted carbonate rock) and associated Pb-Zn and Cu mineralization, somewhat like upper Mississippi Valley deposits. No known intrusions; previous porphyry-related models based on mis-identification of metamorphosed Proterozoic rocks (exposed in Box Elder Canyon and in the subsurface in geothermal wells) as metamorphosed Paleozoic rocks.
Cover thickness and description No cover.
Authors Albert H. Hofstra.
New data needs None requested at this time.
Geologic mapping and modeling needs None requested at this time.
Geophysical survey and modeling needs None requested at this time.
Digital elevation data needs Lidar complete.