地震地质 ›› 1990, Vol. 12 ›› Issue (1): 47-52.

• 科研简报 • 上一篇    下一篇

表层构造横向不均匀性在电磁测深响应中的影响

王宝钧   

  1. 国家地震局地质研究所
  • 收稿日期:1988-03-31 出版日期:1990-03-07 发布日期:2009-11-25

THE EFFECTS OF LATERAL INHOMOGENEITY OF SURFICIAL STRUCTURES IN THE RESPONSE OF MAGNETOTELLURIC SOUNDING

Wang Bao-jun   

  1. Institute of Geology, State Seismological Bureau
  • Received:1988-03-31 Online:1990-03-07 Published:2009-11-25

摘要: 大地电磁测深结果受表层构造横向不均匀性的影响,其视电阻率曲线会发生畸变。为了分析表层构造横向不均匀性对测深曲线的影响,本文采用有限单元方法对几种野外常见的表层横向不均匀构造进行了模拟计算。研究结果表明,表层构造的横向不均匀性对于测深曲线的影响是严重的。

关键词: 横向不均匀性, 视电阻率, 畸变, 电磁响应, E极化, H极化

Abstract: The curves of apparent resistivity obtained from Magnetotelluric Sounding are greatly distorted by the lateral inhomogeneity of surficial structures. In order to delineate clearly the effects of inhomogeneity,in this study,the finite element method has been applied to simulate several structural patterns with lateral inhomogeneity and their effects on the response of Magnetotelluric Sounding. The results show that the effects of lateral inhomogeneity in the shallow layers are significant.

Key words: Lateral inhomogeneity, Apparent resistivity distortion, electromagnetic response, E-polarization, H-polarization