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    Visualization of Active Faulting using 3-D GPR Data Recorded Across the Alpine Fault, New Zealand

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    12601559_McClymont_et_al_GPR2006.pdf (435.3Kb)
    Author
    McClymont, A.F.
    Streich, R.
    Heincke, B.
    Green, A.G.
    Nobes, D.
    Date
    2006
    Permanent Link
    http://hdl.handle.net/10092/2199

    Three-dimensional (3-D) GPR data were acquired across braided river sediments cut by the Alpine Fault at Calf Paddock, New Zealand. We used 100 MHz antennas to obtain images of the subsurface to a depth of 15 m. Cross-sections and depth-converted time slices selected from the migrated data volume show both the structural contrast generated by recent offsets of the fault and the variable orientation of the dipping structures within the braided river deposits. A trace-correlation technique is used to generate dip and dip-direction attribute maps that allow us to visualize the 3-D orientation of the dipping structures. The attribute maps reveal at least 3 different reflection patterns and the presence of minor faulting away from the main fault. A correlation- based migration technique applied to a 2-D GPR profile resulted in the successful identification of the main fault and subsidiary faults at distances up to 50 m from the main fault.

    Subjects
    3-D GPR
     
    Alpine Fault
     
    active faults
     
    braided river deposits
     
    attribute maps
     
    correlation-based migration
     
    Fields of Research::260000 Earth Sciences::260100 Geology::260107 Structural geology
     
    Fields of Research::260000 Earth Sciences::260200 Geophysics::260206 Earthquake seismology
    Collections
    • Science: Conference Contributions [263]
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