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

Information leading to the delineation of this focus area

Basis for focus area Lithocap alunite, Cu-Mo porphyry, Cu skarn, and replacement and vein deposits inside a 10 km buffer around the Resolution porphyry Cu-Mo-Au deposit (33.2933, -111.0568). Area encompasses the Superior East, Magma, Belmont deposits, and a few historical Mn producers.
Identified resources Indicated resources for copper and molybdenum. Historical production of manganese.
Production Copper, Au, and Ag as well as over 30,000 tons of ~ 29% Mn were produced from the Monarch Vein (Queen Creek) (Farnham and others, 1961). The Superior (Magma) mine was active until 1996, producing more than 23 Mt Cu with an average grade of 5% Cu, as well as small amounts of Mn.
Status Past mining, active project advancement for the Resolution deposit.
Estimated resources Preliminarily reports for the Resolution porphyry Cu deposit indicate a 1.25 to 1.75 billion ton deposit grading 1.25% to 1.75% Cu plus Mo. A ~ 400 m thick by ~1200 m wide zone of advanced argillic alteration containing alunite straddles the 1% Cu shell.
Geologic maps Horton and others (2017), scale 1:500,000; Richard (2010), scale 1:100,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Manganese mineralization associated with fractures through limestone.
Deposits Magma mine (Superior) (MRDS dep_id: 10137553), Monarch Vein (MRDS dep_id: 10210810), Nunez Lease (MRDS dep_id: 10137485), Elm Canyon (MRDS dep_id: 10137499).
Evidence from mineral occurrences MRDS; Farnham and others (1961).
Geochemical evidence Unknown.
Geophysical evidence Unknown.
Evidence from other sources General association of manganese mineralization and porphyry systems in region.
Cover thickness and description Exposed at surface.
Authors Albert H. Hofstra, Joshua M. Rosera.
New data needs Detailed geologic mapping, geophysics.
Geologic mapping and modeling needs Geologic mapping.
Geophysical survey and modeling needs High resolution, Rank 1 aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar inadequate.