Generalized analytic solutions and response characteristics of magnetotelluric fields on anisotropic infinite faults. (13th March 2018)

• Record Type: Journal Article
• Authors: Bing, Xue; Yicai, Ji
• Is Part Of: Journal of geophysics and engineering. Volume 15:Number 3(2018:Jun.)
• Page Start: 962
• Page End: 970
• Publication Date: 2018-03-13
• Subjects: Magnetotelluric fields -- TE mode and TM mode -- anisotropy -- vertically layered model -- anisotropic infinite faults; Geophysics -- Periodicals; Prospecting -- Geophysical methods -- Periodicals; Engineering -- Periodicals; 622.1505
• DOI: 10.1088/1742-2140/aaa8a8
• Languages: English
• ISSNs: 1742-2132

Abstract

Abstract: In order to understand directly and analyze accurately the detected magnetotelluric (MT) data on anisotropic infinite faults, two-dimensional partial differential equations of MT fields are used to establish a model of anisotropic infinite faults using the Fourier transform method. A multi-fault model is developed to expand the one-fault model. The transverse electric mode and transverse magnetic mode analytic solutions are derived using two-infinite-fault models. The infinite integral terms of the quasi-analytic solutions are discussed. The dual-fault model is computed using the finite element method to verify the correctness of the solutions. The MT responses of isotropic and anisotropic media are calculated to analyze the response functions by different anisotropic conductivity structures. The thickness and conductivity of the media, influencing MT responses, are discussed. The analytic principles are also given. The analysis results are significant to how MT responses are perceived and to the data interpretation of the complex anisotropic infinite faults.