INVESTIGATION OF 2-D ELECTRICALLY ANISOTROPIC STRUCTURES EMPLOYING MAGNETOTELLURIC DATA

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MONTAHAEI M.; Oskouie b.; BRASSE H.; KAPINOS G.

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Journal: GEOSCIENCES Year:2011 | Volume:21 | Issue:81 Page(s): 115-120

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Information Journal Paper

Title

INVESTIGATION OF 2-D ELECTRICALLY ANISOTROPIC STRUCTURES EMPLOYING MAGNETOTELLURIC DATA

Author(s)

MONTAHAEI M. | Oskouie b. | BRASSE H. | KAPINOS G. | Issue Writer Certificate

Keywords

MAGNETOTELLURICSQ2

ELECTRICAL ANISOTROPYQ2

DIMENSIONALITY ANALYSISQ2

INDUCTION VECTORSQ2

Abstract

Investigations made in current study illustrate that an application of 2-D isotropic inversion algorithm for magnetotelluric data affected by anisotropy could recover macro-anisotropy reasonably well. First anisotropy effects on common MT interpretation steps, DIMENSIONALITY ANALYSIS and 2-D inversion modeling, are investigated. Two kinds of azimuthally anisotropic features (anisotropic block and anisotropic layer) which generally form a part of 2-D models are considered. The influence of different anisotropy strikes and resistivity contrasts on DIMENSIONALITY ANALYSIS and on the behavior of induction arrows is studied. These investigations evince that, a strike direction close to the anisotropy strike can be chosen by the DIMENSIONALITY ANALYSIS of the data. Then if the data are rotated to this angle, 2-D inversion would recover the anisotropy sensibly by means of macro-anisotropy. This procedure is tested successfully on a field data set where anisotropy had been previously recognized. The results show that the proposed approach reproduces the anisotropy acceptably via macro anisotropy in the final inversion model.

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APA: Copy

MONTAHAEI, M., Oskouie, b., BRASSE, H., & KAPINOS, G.. (2011). INVESTIGATION OF 2-D ELECTRICALLY ANISOTROPIC STRUCTURES EMPLOYING MAGNETOTELLURIC DATA. GEOSCIENCES, 21(81), 115-120. SID. https://sid.ir/paper/32026/en

Vancouver: Copy

MONTAHAEI M., Oskouie b., BRASSE H., KAPINOS G.. INVESTIGATION OF 2-D ELECTRICALLY ANISOTROPIC STRUCTURES EMPLOYING MAGNETOTELLURIC DATA. GEOSCIENCES[Internet]. 2011;21(81):115-120. Available from: https://sid.ir/paper/32026/en

IEEE: Copy

M. MONTAHAEI, b. Oskouie, H. BRASSE, and G. KAPINOS, “INVESTIGATION OF 2-D ELECTRICALLY ANISOTROPIC STRUCTURES EMPLOYING MAGNETOTELLURIC DATA,” GEOSCIENCES, vol. 21, no. 81, pp. 115–120, 2011, [Online]. Available: https://sid.ir/paper/32026/en

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