地震地质 ›› 2001, Vol. 23 ›› Issue (2): 257-263.

• 瞬变电磁法研究与应用 • 上一篇    下一篇

利用TEM测深校正MT静态偏移的技术问题

姚治龙1, 王庆乙2, 胡玉平1, 刘俊昌1   

  1. 1. 华北有色地勘局物探公司, 天津300181;
    2. 有色金属总公司北京矿产地质研究所, 北京100012
  • 收稿日期:2001-01-31 修回日期:2001-02-28 出版日期:2001-06-05 发布日期:2009-10-26

TECHNICAL PROBLEMS OF MT STATIC-SHIFT USING TEM SOUNDING CORRECTION

Yao Zhilong1, Wang Qingyi2, Hu Yuping1, Liu Junchang1   

  1. 1. Geophysical Exploration Co. of North China Nonferrous Metal Survey, Tianjin 300181;
    2. Beijing Institute of Mineral, General Co. of Nonferrous Metal, Beijing 100012
  • Received:2001-01-31 Revised:2001-02-28 Online:2001-06-05 Published:2009-10-26

摘要: 由近地表电性不均匀体引起的静态偏移严重地影响了MT资料解释的质量。研究表明,利用时间域电磁测深(TEM)可以有效地解决这个问题。重点讨论了利用TEM做MT静改时需要解决的3个技术问题,并以实例说明了应用效果。

关键词: 大地电磁测深, 瞬变电磁测深, 静态偏移, TE,TM极化

Abstract: The static-shift caused by shallow inhomogeneouties is one of the major factors which lead to severe problems in the interpretation of magnetotelluric (MT) data. It has been shown that this problem can be solved by using time-domain Transient ElectroMagnetic (TEM) sounding. In this paper, the characteristic of MT static shift and the principle of correction by using TEM method are presented. Besides, three technical key points, the features of TEM survey system (TEMS-3S), the data processing software and the correcting techniques, are discussed, and a case history is given as well to illustrate the effectiveness of the correction method for MT static-shift.

Key words: Magnetotelluric (MT), Transient ElectroMagnetic (TEM), Static-shift, TE, TM polarization