The Investigation of the Unity between the Northern Part of the NS-Trending Tectonic Zone and the Seismic Zone from the Charactersitics of the Gravimetric and Magnetic Field
详细信息
- 责任者：Li Xushan (Gansu Institute of Geological Survey ; Lanzhou 730000 ; China) ; Li Baixiang
- 刊名：Geophysical and Geochemical Exploration
- 出版年：2012
- 卷期：36(5)
- 关键词：经向构造体系 ; meridional structural system ; 重力场 ; gravity field ; 磁场 ; magnetic field ; 南北地震带 ; North-South Seismic Belt
- 页码：p.760-765,771
- 图表：2 illus., 18 refs.
- 分类号：0300
- issnNo：ISSN1000-8918
- isbnNo：CN11-1906/P
摘要
Starting with an analysis of the characteristics of the geophysical field, this paper puts forward the evidence for determining the NS-trending tectonic zone on the basis of the east and west differences of NS-striking gravity gradient zone and gravity-magnetic field characteristics, and investigated the regional and deep geological-structural background for the formation of NS-trending tectonic zone as well as the corresponding relationship of the zoned distributions of the earthquakes. The NS-trending tectonic zone reflected by the gravitational gradient zone has not only inheritance manifested by its consistency with the central axis structure but also newborn nature of westward expansion.