Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Semiautomatic and Automatic Cooperative Inversion of Seismic and Magnetotelluric Data

    Access Status
    Open access via publisher
    Authors
    Le, C.
    Harris, Brett
    Pethick, A.
    Takam Takougang, Eric
    Howe, B.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Le, C. and Harris, B. and Pethick, A. and Takam Takougang, E. and Howe, B. 2016. Semiautomatic and Automatic Cooperative Inversion of Seismic and Magnetotelluric Data. Surveys in Geophysics. 37 (5): pp. 845-896.
    Source Title
    Surveys in Geophysics
    DOI
    10.1007/s10712-016-9377-z
    ISSN
    1573-0956
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/4215
    Collection
    • Curtin Research Publications
    Abstract

    Natural source electromagnetic methods have the potential to recover rock property distributions from the surface to great depths. Unfortunately, results in complex 3D geo-electrical settings can be disappointing, especially where significant near-surface conductivity variations exist. In such settings, unconstrained inversion of magnetotelluric data is inexorably non-unique. We believe that: (1) correctly introduced information from seismic reflection can substantially improve MT inversion, (2) a cooperative inversion approach can be automated, and (3) massively parallel computing can make such a process viable. Nine inversion strategies including baseline unconstrained inversion and new automated/semiautomated cooperative inversion approaches are applied to industry-scale co-located 3D seismic and magnetotelluric data sets. These data sets were acquired in one of the Carlin gold deposit districts in north-central Nevada, USA. In our approach, seismic information feeds directly into the creation of sets of prior conductivity model and covariance coefficient distributions.We demonstrate how statistical analysis of the distribution of selected seismic attributes can be used to automatically extract subvolumes that form the framework for prior model 3D conductivity distribution. Our cooperative inversion strategies result in detailed subsurface conductivity distributions that are consistent with seismic, electrical logs and geochemical analysis of cores. Such 3D conductivity distributions would be expected to provide clues to 3D velocity structures that could feed back into full seismic inversion for an iterative practical and truly cooperative inversion process. We anticipate that, with the aid of parallel computing, cooperative inversion of seismic and magnetotelluric data can be fully automated, and we hold confidence that significant and practical advances in this direction have been accomplished.

    Related items

    Showing items related by title, author, creator and subject.

    • Structural constraints in joint inversion of seismic and EM data: Analysis and visualization
      Pethick, Andrew; Harris, Brett (2014)
      Structurally coupled joint inversion of seismic and electromagnetic data is a good candidate for recovering subsurface earth properties if the direction of change of electrical conductivity and acoustic impedance are ...
    • Unconstrained 2D and 3D magnetotelluric inversion - Detection of a Ni-Cu-PGE ore zone and carbonaceous phyllites - Kevitsa
      Le, C.; Harris, Brett; Pethick, Andrew (2016)
      The large Kevitsa Ni-Cu-PGE (platinum group elements) deposit in Finland is part of a complex geoelectrical setting. The ore zone is electrically conductive compared to the high resistivity olivine pyroxenite host rock. ...
    • A new co-operative inversion strategy via fuzzy clustering technique applied to seismic and magnetotelluric data
      Thong Kieu, D.; Kepic, Anton (2015)
      Geophysical inversion produces very useful images of earth parameters; however, inversion results usually suffer from inherent non-uniqueness: many subsurface models with different structures and parameters can explain ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.