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    Sanidine, Single Crystal, Laser-Fusion 40Ar/39Ar Geochronology Database for the Superstition Volcanic Field, Central Arizona

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    Author
    McIntosh, W.C.
    Ferguson, C.A.
    Issue Date
    1998-12-01
    Keywords
    Arizona Geological Survey Open File Reports
    Proterozoic
    Pre-Tertiary
    Quaternary
    Tertiary
    Buzzards Roost
    Tule Canyon
    Bulldog Canyon
    lower Salt River Canyon
    Superstition Mountains
    Santan Mountains
    Goldfield Mountains
    Whitlow Canyon
    Pima County
    Arizona
    Superstition Volcanic Field
    rhyolite
    sanidine crystals
    Laser-Fusion
    K-Ar
    hornblende
    biotite
    plagioclase
    quartz
    rhyodacite
    lava flow
    basalt
    geochronology
    ash-flow
    copper
    volcanic field
    Apace Leap Tuff
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    Citation
    McIntosh, W.C. and Ferguson, C.A., 1998, Sanidine, Single Crystal, Laser-Fusion 40Ar/39Ar Geochronology Database for the Superstition Volcanic Field, Central Arizona. Arizona Geological Survey Open File Report, OFR-98-27, 74 p.
    Description
    The Superstition volcanic field or Superstition - Superior volcanic field (Sheridan, 1978) of central Arizona has had a long, complex history of geological investigation. Starting along its eastern edge with studies of the Globe-Miami copper district (Ransome, 1903) work has continued for nearly one hundred years mainly in the rugged Superstition Mountains along the eastern fringe of the Phoenix metropolitan area (eg. Peterson, 1960, 1968, 1969; Peterson and others, 1983; Stuckless and Sheridan, 1971; Sheridan and others, 1970; Sheridan, 1987; and Sheridan and Prowell, 1986). Investigations initiated in 1994 by the Arizona Geological Survey concentrated on detailed (1:24,000) mapping of 7.5' quadrangles in the Superior area, Whitlow Canyon area, Goldfield Mountains, Santan Mountains, Superstition Mountains, and along the lower Salt River Canyon (Figure 1). Early on in the investigation, it was determined that the area's stratigraphic framework was considerably different from previous interpretations and that the volcanic field's geochronology was poorly resolved. The previous stratigraphic framework and nomenclature was exceptionally complex (Skotnicki and Ferguson, 1995; Trapp, 1996). Previous workers (principally Stuckless and Sheridan, 1971; Sheridan, 1987) had concluded that the field included at least three large ash-flow tuff cauldrons and that the duration of volcanism spanned over 10 million years from the latest Oligocene (27 Ma) to middle Miocene (15 Ma).
    URI
    http://hdl.handle.net/10150/629959
    Additional Links
    https://library.azgs.arizona.edu/
    Language
    en
    Series/Report no.
    OFR-98-27
    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
    33.5252
    South Bounding Coordinate
    33.3831
    West Bounding Coordinate
    -111.412
    East Bounding Coordinate
    -111.135
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