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    Mauna Loa's submarine western flank: Evidence for deep volcanic spreading and hydrothermal alteration

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    Author
    Borchers, Deanna Caroline
    Date
    2005
    Advisor
    Morgan, Julia K.
    Degree
    Master of Science
    Abstract
    Observations of submersible dives across Mauna Loa's submarine western flank suggest the flank has been influenced by a number of interacting processes, including large-scale sector collapses, deep volcanic spreading, and hydrothermal alteration. Subaerially derived pillow lavas observed draping the upper flank are in strong contrast to the volcaniclastic debris discovered at the toe of the flank. The distribution of rock types, deformation structures, and alteration phases within the volcaniclastic rocks suggest the mid-slope bench is constructed of a series of thrust sheets formed by seaward sliding of the western flank. Volcaniclastic sediments within the bench have been locally altered by circulation of hot hydrothermal fluids along the faults. The remnant landslide scar, from which much of the clastic debris within the bench derived, has largely been concealed by a flood of new lava flows, many of which crossed the shoreline and were deposited on the upper flank as pillow basalts.
    Keyword
    Geology
    Citation
    Borchers, Deanna Caroline. "Mauna Loa's submarine western flank: Evidence for deep volcanic spreading and hydrothermal alteration." (2005) Master’s Thesis, Rice University. https://hdl.handle.net/1911/17758.
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    Home | FAQ | Contact Us | Privacy Notice | Accessibility Statement
    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892
    Site Map