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    Economic Geology of the Big Horn Mountains of West-Central Arizona

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    Author
    Allen, G.B.
    Issue Date
    1985
    Keywords
    Arizona Geological Survey Open File Reports
    Mesozoic
    Proterozoic
    Arizona
    Big Horn Mountains
    silicic volcanic rocks
    diorite intrusives
    monzonite
    granite
    gneiss
    schists
    phyllite
    amphibolite
    Geology
    Late Cretaceous
    Cenozoic
    Maricopa County
    Big Horn mineral district
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    Citation
    Allen, G.B., 1985, Economic Geology of the Big Horn Mountains of West-Central Arizona. Arizona Geological Survey Open File Report, OFR-85-17, 152 p.
    Description
    The Big Horn Mountains are a geologically complex range that extends over 500 square km in west-central Arizona. Three major lithologic terranes outcrop: (1) Proterozoic amphibolite, phyllite, schists, gneiss, and granite; (2) Mesozoic monzonite to diorite intrusives; and (3) Cenozoic mafic to silicic volcanic rocks and clastic rocks. The entire area is in the upper plate of a detachment fault and, consequently, contains many low- to high-angle normal faults. Each lithologic terrane has its associated mineral occurrences. The Big Horn district is exclusively hosted in the pre-Tertiary terrane. Most of its mineral occurrences are spatially related to the Late Cretaceous intrusive rocks. One occurrence, the Pump Mine, may be a metamorphic secretion deposit, and therefore, would be middle Proterozoic.
    URI
    http://hdl.handle.net/10150/629321
    Additional Links
    http://repository.azgs.az.gov/uri_gin/azgs/dlio/862
    Language
    en
    Series/Report no.
    OFR-85-17
    Rights
    Arizona Geological Survey. All rights reserved.
    Collection Information
    Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.
    North Bounding Coordinate
    33.6767
    South Bounding Coordinate
    33.528
    West Bounding Coordinate
    -113.217
    East Bounding Coordinate
    -113.045
    Collections
    AZGS Document Repository

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