A Study of Magnetotelluric Sounding in the Middle Segment of the Longmensham Structural Belt
详细信息
- 责任者：Zhang Zhenyu (Institute of Geophysical and Geochemical Exploration ; CAGS ; Langfang 065000 ; China) ; Wang Xuben
- 刊名：Geophysical and Geochemical Exploration
- 出版年：2012
- 卷期：36(3)
- 关键词：地震构造 ; seismotectonics ; 大地电磁测深 ; telluric electromagnetic sounding ; 龙门山断裂带 ; Longmenshan Fault Zone
- 页码：p.377-381
- 图表：2 illus., 15 refs.
- 分类号：1600
- issnNo：ISSN1000-8918
- isbnNo：CN11-1906/P
摘要
With multifunction instrument V8 generated by Phoenix Company in Canada,the authors carried out magnetotelluric sounding study in the middle section of Longmenshan structural belt,and used advanced data processing and interpretation of electromagnetic technology to analyze magnetotelluric sounding(MT) profile data.At the same time,the profile was analyzed by the qualitative analysis method(Mohr circle analysis,polarization diagram analysis) and the interpretation of magnetotelluric sounding.It is concluded that the overall performance of the profile is two-dimensional,and the anisotropy and three-dimensional nature are relatively strong in the fracture sub-region.It is also inferred that the source location of the Wenchuan Magnetude-8 Earthquake that occurred in May 12,2008 was in the footfall of Yinxiu fault.