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Publication MBMG 715
Citation Scarberry, K.C., Elliott, C.G., and Yakovlev, P.V., 2019, Geology of the Butte North 30' x 60' quadrangle, southwest Montana: Montana Bureau of Mines and Geology Open-File Report 715, 30 p., 1 sheet, scale 1:100,000.
Price $ 12.00
Document Version This is an open-file publication. MBMG open files are manuscripts and maps that are released, but not considered formal publications; most have not gone through the rigorous review and editorial process required for an official report. Some open-file reports eventually appear as formal Bureau publications.
Document Status Print on Demand
Description The Butte North quadrangle lies in a geologically complex area of southwestern Montana. Archean and Paleoproterozoic crystalline basement rock, Mesoproterozoic through Cretaceous metasedimentary and sedimentary rock, Cretaceous through Tertiary intrusive and volcanic rock, and Tertiary and Quaternary valley-fill and surficial deposits are all exposed in the quadrangle. The Late Cretaceous Boulder Batholith and co-magmatic Elkhorn Mountains Volcanic Field, and the Eocene-Oligocene Lowland Creek and Elliston volcanic fields are the dominant units in the quadrangle. The Boulder Batholith hosts two world-class porphyry Cu-Mo deposits, which are cut by polymetallic lode veins.
Subject(s) ELKHORN MOUNTAINS VOLCANIC FIELD, BOULDER BATHOLITH, LOWLAND CREEK VOLCANIC FIELD, AMACONDA METAMORPHIC CORE COMPLEX, DETACHMENT, CENOZOIC MAGMATISM, BASIN AND RANGE EXTENSION
Geographic Area/Counties DEER LODGE, JEFFERSON, LEWIS AND CLARK, POWELL, SILVER BOW
Files Available for Download Download Map 54 Mb
Download report 518 kb