Interpretation of Magnetotelluric Sparse Survey Lines Data and Dense 3D Grid Data

Geoscience ›› 2012, Vol. 26 ›› Issue (6): 1185-1192.

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Interpretation of Magnetotelluric Sparse Survey Lines Data and Dense 3D Grid Data

LIN Chang hong^1,2, TAN Han dong ^1,2, TONG Tuo ^1,2

1 School of Geophysics and Information Technology, China University of Geosciences, Beijing100083, China
2 Key Laboratory of Geodetection (China University of Geosciences）, Ministry of Education, Beijing100083, China

Received:2012-06-02 Revised:2012-08-18 Online:2012-10-24 Published:2012-10-31

Abstract

Abstract:

We inverted the synthetic sparse survey lines data and dense 3D grid data generated from the test models and the field single line data. From the comparison between the 3D inversion results of synthetic sparse survey lines data and the 3D inversion results of dense 3D grid data, it is found that the 3D inversion results of synthetic sparse survey lines data can recover the 3D target although the effect is not as good as the 3D inversion results of dense 3D grid data. The 3D inversion results of the field single line data well reflect the 3D information of the bedrock interface underground near the survey line. The 3D inversion results show that it is possible to interpret MT sparse survey lines data using 3D inversion method. From the analysis of 3D inversion results from the synthetic data, all the tensor elements are suggested to be used in 3D inversion to interpret the sparse survey lines data and two offdiagonal elements can be used in 3D inversion to interpret the dense 3D grid data, while the results are better when all the tensor elements are used.

Key words: Key words:magnetotelluric, 3D inversion, tensor element

LIN Chang-Hong, TAN Gan-Dong, TONG Ta. Interpretation of Magnetotelluric Sparse Survey Lines Data and Dense 3D Grid Data[J]. Geoscience, 2012, 26(6): 1185-1192.

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Interpretation of Magnetotelluric Sparse Survey Lines Data and Dense 3D Grid Data

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