桂林理工大学学报2016，Vol.36Issue(4)：660-669,10.DOI:10.3969/j.issn.1674-9057.2016.04.004
存在复杂非均匀层的一维大地电磁正演
1D magnetotelluric forward modeling of complex inhomogeneous layers
摘要
Abstract
In 2D and 3D magnetotelluric(MT) inversion,1D inversion data is often used as the initial iterative model or forward modeling to definite the boundary condition.In order to further study MT response under complex stratum condition,the analytical solution for 1 D MT modeling is derived where the conductivity of inhomogeneous layers vary with depth are linear-exponential and exponential-linear form.On this basis,the differentstratum combination conditions are discussed,and the effect of depth and thickness of inhomogeneous layer on the MT response is analyzed.The results are compared with analytic solution from homogeneous medium model and single variation model.It is shown that the MT responses of linear-and-exponential variation model with inhomogeneous are more complex than single variation model.With the thickness being larger and the embedded depth being shallower for inhomogeneous layers,the differences of resistivity and phase of MT response with the homogeneous medium model become larger.关键词
大地电磁测深/非均匀层/正演Key words
magnetotelluric sounding/inhomogeneous layer/forward modeling分类
天文与地球科学引用本文复制引用
凌嘉宣,李长伟,赵荣春,熊彬..存在复杂非均匀层的一维大地电磁正演[J].桂林理工大学学报,2016,36(4):660-669,10.基金项目
国家自然科学基金项目(41464002 （）
41674075) （）
广西自然科学基金项目(2013GXNSFAA019277) （2013GXNSFAA019277）
广西高校科研项目(2013YB107) （2013YB107）
