Fast approximate inversion of magnetotelluric (FAIMT) data for a horizontally layered earth with near-surface inhomogeneities

Sun Chuan-wen; Philip D. Rabinowitz

doi:10.1007/BF02850576

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Fast approximate inversion of magnetotelluric (FAIMT) data for a horizontally layered earth with near-surface inhomogeneities

Updated：2023-05-16

- Fast approximate inversion of magnetotelluric (FAIMT) data for a horizontally layered earth with near-surface inhomogeneities
- Journal of Oceanology and Limnology Vol. 15, Issue 1, Pages: 7-18(1997)
- Affiliations：
  
  Department of Geology and Geophysics
- Author bio：
- Funds：
- DOI：10.1007/BF02850576
  CLC：
- Published：1997
- Accepted：
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Chuan-wen, S., Rabinowitz, P.D. Fast approximate inversion of magnetotelluric (FAIMT) data for a horizontally layered earth with near-surface inhomogeneities., Chin. J. Ocean. Limnol. 15, 7–18 (1997). https://doi.org/10.1007/BF02850576
DOI：

Chuan-wen, S., Rabinowitz, P.D. Fast approximate inversion of magnetotelluric (FAIMT) data for a horizontally layered earth with near-surface inhomogeneities., Chin. J. Ocean. Limnol. 15, 7–18 (1997). https://doi.org/10.1007/BF02850576 DOI：

摘要

Abstract

This paper discusses use of approximations and the Integral Mean Value Theorem to show that 6 coefficients approximately describe the distortions of near surface inhomogeneities on the MT field of a horizontally layered earth model. When these 6 coefficients are considered together with those of the magnetic field of a horizontally layered earth model

the analytic and approximate wave impedance equations can be derived for the MT response of a horizontally layered earth model with near-surface 2-D and 3-D inhomogeneities. These approximate wave impedance equations are used with inverted MT data for 2-D and 3-D forward modelling. Although these 6 coefficients cannot be determined before inversion

initial estimates can be used. The 6 coefficients and the resistivity and thickness of each layer of a horizontally layered earth can be obtained by using published inversion methods. The 6 coefficients give important information (depths and resistivities) on the near-surface inhomogenelties. The authors inverted 2-D and 3-D theoretical models for Fast Approximate Inversion of Magnetotelluric (FAIMT) data for a horizontally layered earth with near-surface inhomogeneities compares favorably with traditional inversion methods

especially for inverting regional or basin structures. This method simplifies

computation and gives a reasonable 1-D geological model with fewer nonuniqueness problems.

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references

Bahr, K., 1988. Interpation of the magnetotelluric impedance tensor: regional induction and local telluric distortion:J. Geophys,62: 119–127.

Eggers, D. E., 1982. An eigenstate formulation of the magnetotelluric impedance tensor: Geophysics,47: 1024–1214.

Groom, R. W., Bailey, R. C., 1991. Analytic, investigations of the effects of near-surface three-dimensional galvanic scatters on MT tensor decompositions: Geophysics,56: 496–518.

Hohmann, G. W., 1975. Three-dimensional-induction polarization and electromagnetic modeling: Geophysics, 40: 309–324.

Jupp, D. L., Vozoff, K., 1977. Two-dimensional magnetotelluric inversion: Geophys,J. R. Astron. Soc.,50: 333–352.

Kaufman, A. A., Keller, G. V., 1981. Inductive Mining Prospecting; Part I: Theory: Elsevier Scientific Publishing Company.

Latorraca, G. A., Madden, T. R., Korringa, J., 1986. An analysis of the magnetotelluric impedance for three-dimensional conductivity structures: Geophysics,51: 1819–1829.

Mackie, R. L., 1993. Three-dimensional magnetotelluric inversion using conjugate gradients: Geophys. J. Int.,115: 215–229.

Madden, T. R., Mackie, R. L., 1989. Three-dimensional magnetotelluric modeling and inversion,Proc. IEEE,77: 318–333.

Park, S. K., 1985. Distortion of magnetotelluric sounding curves by three-dimensional structures:Geophysics,50: 785–707.

Smith, J. T., Booker, J. R., 1991. Rapid inversion of two-and three-dimensional magnetotelluric data,J. Geophys Res.96: 3905–3922.

Spitz, S., 1985. The magnetotelluric impedance tensor properties with respect to rotations:Geophysics,50: 1610–1617.

Torres-Verdin, C., Bostick, F. X., Jr., 1992. Implications of the Born approximation for the magnetotelluric problem in three-dimensional environments,Geophysics,57: 587–602.

Wannamaker, P. E., Hohmann, G. W., Ward, S. H., 1984. Magnetotelluric response of three-dimensional bodies in layered earths:Geophysics,49: 1517–1533.

Weidelt, P., 1975. Electromagnetic induction in three-dimensional structures,J. Geophys,41: 1517–1533.

Zhang, P., Roberts, R. G., Pedersen, L. B., 1987. Magnetotelluric strike rules:Geophysics,52: 267–278.

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