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    Geophysical Imaging of Fault Structures Over the Qadimah Fault, Saudi Arabia

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    Type
    Thesis
    Authors
    AlTawash, Feras
    Advisors
    Schuster, Gerard T. cc
    Committee members
    Jonsson, Sigurjon cc
    Stewart, Ian
    Program
    Earth Science and Engineering
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2011-06
    Permanent link to this record
    http://hdl.handle.net/10754/205814
    
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    Abstract
    The purpose of this study is to use geophysical imaging methods to identify the conjectured location of the ‘Qadimah fault’ near the ‘King Abdullah Economic City’, Saudi Arabia. Towards this goal, 2-D resistivity and seismic surveys were conducted at two different locations, site 1 and site 2, along the proposed trace of the ‘Qadimah fault’. Three processing techniques were used to validate the fault (i) 2-D travel time tomography, (ii) resistivity imaging, and (iii) reflection trim stacking. The refraction traveltime tomograms at site 1 and site 2 both show low-velocity zones (LVZ’s) next to the conjectured fault trace. These LVZ’s are interpreted as colluvial wedges that are often observed on the downthrown side of normal faults. The resistivity tomograms are consistent with this interpretation in that there is a significant change in resistivity values along the conjectured fault trace. Processing the reflection data did not clearly reveal the existence of a fault, and is partly due to the sub-optimal design of the reflection experiment. Overall, the results of this study strongly, but not definitively, suggest the existence of the Qadimah fault in the ‘King Abdullah Economic City’ region of Saudi Arabia.
    Citation
    AlTawash, F. (2011). Geophysical Imaging of Fault Structures Over the Qadimah Fault, Saudi Arabia. KAUST Research Repository. https://doi.org/10.25781/KAUST-3COBA
    DOI
    10.25781/KAUST-3COBA
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-3COBA
    Scopus Count
    Collections
    Theses; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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