Identification and Correction for MT Static Shift Using TEM Inversion Technique

作     者：Yang ChangfuDepartment of Earth Science, Nanjing University, Nanjing 210093Lin ChangyouLanzhou Institute of Seismology, China Seismological Bureau, Lanzhou 730000 

作者机构：Department of Earth Science Nanjing University Nanjing 210093 Lanzhou Institute of Seismology China Seismological Bureau Lanzhou 730000 

出 版 物：《Journal of China University of Geosciences》 (中国地质大学学报（英文版）)

年 卷 期：2001年第12卷第3期

页      面：266-271页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：thepreviousMinistryofCoalIndustryandGansuSciencesTechnologyCommittee 

主　　题：TEM inversion MT correction of static shift. 

摘      要：The inversion of TEM data, using the observed magnetic fields instead of that of apparent resistivities data in this paper, avoids the errors caused by the definition of the apparent resistivity. The inversed results by fitting the magnetic fields of the transmitter source s image with the observed magnetic fields are relatively less affected by the conductivity inhomogeneity. The MT apparent curve is calculated on the basis of the conductivity model constructed from the TEM inversion results. This curve is used as a reference curve for the correction of MT static shift, which makes the correction more reliable. Meanwhile, the domain transformation is also achieved from time to frequency between the two kinds of electromagnetic data. Therefore, the correction of the MT static shift is actualized using TEM inversion method. The corresponding application research shows that this method is very effective for the identification and correction of the MT static shift.