Volume 40 Issue 10
Oct.  2015
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Yang Huaijie, Pan Heping, Luo Miao, Meng Qingxin, 2015. Numerical Modeling for Transient Anomalous Secondary Electromagnetic of Tabular Orebody in Borehole. Earth Science, 40(10): 1689-1700. doi: 10.3799/dqkx.2015.152
Citation: Yang Huaijie, Pan Heping, Luo Miao, Meng Qingxin, 2015. Numerical Modeling for Transient Anomalous Secondary Electromagnetic of Tabular Orebody in Borehole. Earth Science, 40(10): 1689-1700. doi: 10.3799/dqkx.2015.152
shu

Numerical Modeling for Transient Anomalous Secondary Electromagnetic of Tabular Orebody in Borehole

doi: 10.3799/dqkx.2015.152
  • 1.

    Institute of Geophysics & Geomatics, China University of Geosciences, Wuhan 430074, China

  • 2.

    Shijiazhuang University of Economics, Shijiazhuang 050031, China

  • Received Date: 2014-12-20
  • Publish Date: 2015-10-15
    Abstract
  • The transient electromagnetic response of conductive orebody is studied so as to provide a reliable basis for the exploration of the transient electromagnetic in borehole. Finite-different time-domain method and Mur absorbing boundary were used to simulate three-dimensional transient electromagnetic field generated by magnetic dipole source, and establishing the geometric model of low resistivity orebody with different depth, different sizes, different dips, as well as high resistivity orebody in the whole space. During the data processing, excluding the impact of conductive whole space to the total response and getting the anomalous secondary field which reflects the target characteristics. The regularity of the geometric model was analyzed, and the result shows that the orebody with different depth, sizes, dips and conductivity have very different response. The method for identification of tabular orbody has a significant effect.

     

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