Junction District Pb-Zn

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

Information leading to the delineation of this focus area

Basis for focus area Mapped dolomites in Idaho from Horton and others (2017).
Identified resources Historical production of lead, silver, and zinc.
Production The Kimmel and Leadville (Sunset) mines produced about 13,444 tons of ore containing significant Pb and Ag, with minor Cu, Zn, and Au.
Status Past mining.
Estimated resources Unknown.
Geologic maps Evans and Green (2003), scale 1:100,000; Ruppel and Lopez (1988), scale 1:200,000.
Geophysical data Inadequate Rank 3 to 4 aeromagnetic and Rank 4 aeroradiometric coverage.
Favorable rocks and structures The principal mines in the district are Pb-Ag replacement deposits in Mississippian limestone; a few small mines explore deposits of secondary copper minerals in fractures and in thrust fault breccias (Ruppel and Lopez, 1988).
Deposits Kimmell mine (MRDS dep_id: 10011682), Sunset mine (MRDS dep_id: 10105783).
Evidence from mineral occurrences MRDS; Idaho Geological Survey polymetallic sites with Mg.
Geochemical evidence One 43-ton test shipment from the Kimmel No. 2 level assayed 5.2% Pb and 3 oz/ton Ag.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Exposed at the surface.
Authors Jane M. Hammarstrom, Virginia S. Gillerman, Reed S. Lewis, Christopher A. Tate.
New data needs None at this time.
Geologic mapping and modeling needs None requested at this time.
Geophysical survey and modeling needs Not applicable to magnesium deposits.
Digital elevation data needs Lidar in progress.