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    Constraining neotectonic deformation of the Colombian sub-Andes

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    Dalman_ku_0099M_14010_DATA_1.pdf (2.896Mb)
    Issue Date
    2015-05-31
    Author
    Dalman, Erica Megan
    Publisher
    University of Kansas
    Format
    67 pages
    Type
    Thesis
    Degree Level
    M.S.
    Discipline
    Geology
    Rights
    Copyright held by the author.
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    Abstract
    The eastern foothills of the Eastern Cordillera of the Colombian Andes are actively shortening; however, deformation rates of Quaternary structures remain sparse. Here we present millennia-scale deformation rates of the Guaicaramo thrust in the Eastern Cordillera using Terrestrial in situ Cosmogenic Nuclide dating techniques. Furthermore, we analyze river profiles along strike using digital elevation models to quantify the fluvial response to uplift. This research provides insight into thrust wedge mechanics and dynamics, seismic hazard mitigation, and hydrocarbon production potential of the region. The Quaternary shortening rate of the Guaicaramo thrust is 1.72 ± 0.30 mm/yr, which represents ~3% of the total horizontal shortening across the Colombian Andes. Furthermore, the normalized channel steepness (ksn) values reflect that the Eastern Cordillera foothills are experiencing rapid uplift. Analysis of ksn is a novel approach in the region. This work provides quantitative metrics of the surface response to uplift along the eastern foothills of the Eastern Cordillera.
    URI
    http://hdl.handle.net/1808/19027
    Collections
    • Geology Dissertations and Theses [232]
    • Theses [3906]

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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