Analytic magnetotelluric responses to a two-segment model with axially anisotropic conductivity structures overlying a perfect conductor

作者：Qin, Linjiang; Yang, Changfu^*

来源：Geophysical Journal International, 2016, 205(3): 1729-1739.

DOI：10.1093/gji/ggw109

• Electrical anisotropy
• Electrical properties
• Electromagnetic theory
• Magnetotellurics

The rocks in the crust and the upper mantle of the Earth are believed to exhibit electrical anisotropy to some extent. It is beneficial to further understand and recognize the propagation of the electromagnetic waves in the Earth by investigating the magnetotelluric (which is one of the main geophysical techniques to probe the deep structures in the Earth) responses of the media with anisotropic conductivity structures. In this study, we examine the magnetotelluric fields over an idealized 2-D model consisting of two segments with axially anisotropic conductivity structures overlying a perfect conductor basement by a quasi-static analytic approach. The resulting analytic solution could not only contribute to the electromagnetic induction theory in the anisotropic Earth but also serve as at least an initial standard solution which could be used to validate the reliability and accuracy of the numerical algorithms developed for modelling the magnetotelluric responses of the 2-D media with much more general anisotropic conductivity.

• 出版日期2016-6
• 单位浙江大学; 国家海洋局第二海洋研究所