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Joint electromagnetic and seismic inversion survey: status and prospect

LIU Yan,LU Qing-tian,MENG Gui-xiang,YAN Jia-yong,ZHANG Kun,YANG Zhen-wei (Institute of Mineral Resources Chinese Academy of Geological Sciences,MLR Key Laboratory of Metallogeny and Mineral Assessment,Beijing 100037,China)  
Considering the advantages and limitations of magnetoelectrotelluric detection and seismic exploration,this paper states joint inversion more superior than a single geophysical data inversion.Two kinds of classification methods of joint inversion are analyzed,and the foundation of joint magnetoelectrotelluric and seismic inversion is pointed out,including the similar in theory and the relations on physical property.This paper surveys the research status and existing problems of joint inversion with magnetoelectrotelluric and seismic at domestic and overseas,and summarizes its two algorithms in homogeneous and heterogeneous medium.As the key of joint inversion is to coupling of two different physical property parameters,we discuss the applicability of rock physical method and structure method which are widely used.At last,we propose on joint magnetoelectrotelluric and seismic inversion.Linear iterative technology must be optimized in homogeneous medium,and nonlinear inversion theory need step up to the nonlinear inversion practice in complex geological heterogeneous structure.As structure method inversion has broad prospects,the actual data utilization needs to strengthen.It is also necessary to combination geological information including rock physical property on joint magnetoelectrotelluric and seismic inversion.
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