1887

Abstract

Summary

The grounded electrical-source airborne transient electromagnetic (GREATEM) method has been successfully applied to the geological mapping and environmental exploration in China and other Asian countries. However, the survey data is mainly interpreted with a flat earth model even in areas with rugged topography. The topographic effects can be serious in EM responses especially for early time channels. Neglecting the topographic effect can result in incorrect results in the interpretations of GREATEM data. In this paper, we model 3D time-domain EM responses for GREATEM system with unstructured edged finite-element method in combination with the backward Euler scheme. The tetrahedral grids are used to handle the complex geometry. We verify the effectiveness of our algorithm by analyzing numerical experiments for different topographic models.

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/content/papers/10.3997/2214-4609.201601305
2016-05-30
2024-04-19
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References

  1. Allah, S.A., Mogi, T., Ito, H., Jomori, A., Yuuki, Y., et al.
    [2013] Three-dimensional resistivity characterization of a coastal area: Application of Grounded Electrical-Source Airborne Transient Electromagentic (GREATEM) survey data from Kujukuri Beach, Japan. Journal of Applied Geophysics, 99, 1–11.
    [Google Scholar]
  2. Allah, S.A., Mogi, T., Ito, H., Jymori, A., Yuuki, Y., et al.
    [2014] Three-dimensional resistivity modelling of grounded electrical-source airborne transient electromagnetic (GREATEM) survey data from the Nojima Fault, Awaji Island, south-east Japan. Exploration Geophysics, 45, 49–61.
    [Google Scholar]
  3. Amestoy, P.R., Guermouche, A., L’ExcellentJ.-Y. and Pralet, S.
    [2006] Hybrid scheduling for the parallel solution of linear systems. Parallel Computing, 32, 136–156.
    [Google Scholar]
  4. Ito, H., Kaieda, H., Mogi, T., Jomori, A. and Yuuki, Y.
    [2014] Grounded electrical-source airborne transient electromagnetics (GREATEM) survey of Aso Volcano, Japan. Exploration Geophysics, 45, 43–48.
    [Google Scholar]
  5. Jin, J.
    [2002] The finite element method in electromagnetics, 2nd Edition. John Wiler and Sons.
    [Google Scholar]
  6. Liu, X., Zhang, Y.Y, Lu, X.S. and Yao, W.H.
    [2015] Inverse synthetic aperture imaging of ground-airborne transient electromagnetic method with a galvanic source. Chinese Journal of Geophysics, 58, 277–288.
    [Google Scholar]
  7. Mogi, T., Tanaka, Y., Kusunoki, K., Morikawa, T. and Jomori, N.
    [1998] Development of grounded electrical-source airborne transient EM (GREATEM). Exploration Geophysics, 29, 61–64.
    [Google Scholar]
  8. Smith, R.S., Annan, A. P. and McGowan, P. D.
    [2001] A comparison of data from airborne, semi-airborne, and ground electromagnetic systems. Geophysics, 66, 1379–1385.
    [Google Scholar]
  9. Strack, K.M.
    [1992] Exploration with deep transient electromagnetics. Elsevier Science, 373.
    [Google Scholar]
  10. Um, E.S., Harris, J.M. and Alumbaugh, D.L.
    [2010] 3D time-domain simulation of electromagnetic diffusion phenomena: A finite-element electric-field approach. Geophysics, 75, F115–F126.
    [Google Scholar]
  11. Wang, Y., Ji, Y.J., LiS.Y., Lin, J., Zhou, F.D. and Yang, G.H.
    [2013] A wavelet-based baseline drift correction method for grounded electrical source airborne transient electromagnetic signals. Exploration Geophysics, 44, 229–237.
    [Google Scholar]
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