1887

Abstract

Summary

The paper is devoted to one of the aspects of multidimensional interpretation airborne electromagnetic (EM) data in the time domain, which relates to the question of the topography effect on the measured signals. Using the 3D modeling of airborne EM data for a geoelectrical model including the surface relief and target object in the form of a tube, which are typical of one of the areas in Eastern Siberia, we analyze the differences between the signals obtained when the topography is taken into account accurately and those obtained when the topography is taken into account approximately by the corresponding correction of the transmitter-receiver altitudes over the horizontal ground surface. It is shown that the signal changes caused by ground surface relief can easily be confused with the signals caused by other inhomogeneities including target objects. Therefore, for correct data processing, it is necessary to use the 3D inversions with quite an accurate accounting of the ground surface relief.

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/content/papers/10.3997/2214-4609.201800314
2018-04-09
2024-04-29
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References

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    [Google Scholar]
  10. McMillanM.S., OldenburgD.W., HaberE., and SchwarzbachC.
    [2015] Parametric 3D inversion of airborne time domain electromagnetics. 24th International Geophysical Conference and Exhibition. ASEG Extended Abstracts2015: pp. 1–5.
    [Google Scholar]
  11. Persova, M.G., Soloveichik, Y.G., Koshkina, Y.I., Vagin, D.V. and Trubacheva, O.S.
    [2016] Geometrical nonlinear 3D inversion of airborne time domain EM data. Near Surface Geoscience 2016 - Proceedings of the 1st Conference on Geophysics for Mineral Exploration and Mining, Barcelona, Tu MIN 07.
    [Google Scholar]
  12. Persova, M.G., Soloveichik, Y.G., Simon, E.I., Koshkina, Y.I., Epanchintseva, T.B.
    [2015] Methods and software to perform 3D-inversion of the airborne electrical prospecting data in time domain. Geophysics 2015 - 11th EAGE International Scientific and Practical Conference and Exhibition on Engineering and Mining Geophysics, p. 51DUMMY.
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  13. Persova, M.G., Soloveichik, Y.G., Trigubovich, G.M., Vagin, D.V., Domnikov, P.A.
    [2014] Transient electromagnetic modelling of an isolated wire loop over a conductive medium. Geophysical Prospecting, 62(5), 1193–1201.
    [Google Scholar]
  14. Persova, M.G., Soloveichik, Y.G. and Trigubovich, G.M.
    [2011] Computer modeling of geoelectromagnetic fields in three-dimensional media by the finite element method. Izvestiya, Physics of the Solid Earth, 47(2), 79–89.
    [Google Scholar]
  15. Yang, D., Oldenburg, D.W. and Haber, E.
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    [Google Scholar]
  16. Yin, C., Zhang, B., Liu, Y. and Cai, J.
    [2016] A goal-oriented adaptive finite-element method for 3D scattered airborne electromagnetic method modeling. Geophysics, 81, E337–E346.
    [Google Scholar]
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