The Conductivity Characteristics of Middle and Upper Crust of Jingyuan Yanchi, Southern Ningxia Arc Structure
详细信息
- 责任者：Yin Bingxi (Geological Survey of Ningxia Hui Autonomous Region ; Yinchuan 750021 ; China) ; Cheng Jianhua
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(4)
- 关键词：构造带 ; tectonic zones ; 上地壳 ; upper crust ; 电性结构 ; electrical structure ; 宁夏 ; Ningxia ; 甘肃 ; Gansu Province
- 页码：p.332-339
- 图表：illus., 26 refs.
- 分类号：0400
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
By processing,interpreting and inverting magnetotelluric sounding data of a profile in the main arc structure in Ningxia Province,we revealed the electric property structure of middle Qilian folded-uplift belt,Jingyuan Xiji depression belt,Xihuasha Liupanshan folded-uplift belt,Xingren Haiyuan depression belt,Zhongwei Tongxin rift zone,Weining Beishan Luoshan depression belt,west-Ordos folded-uplift belt and 30 km depth of the Tianhuan depression belt,and the relationships among them.It can be inferred that the Qilian collision orogenic belt is of a thrust imbricate fault structure pattern,which thrusted from SW to NEN and the long pleated band in the western margin of Ordos stacked in order from east to west.The results show that low-conductivity layer in the crust is mainly distributed discontinuously in north Qilian collision orogenic belt and Xingrenbao Haiyuan depression belt in the arc structure of Southern Ningxia,and the high conductivity layer of Qilian orogenic belt is ended in Xingrenbao Haiyuan depression belt.The high conductivity layer of Xingrenbao Haiyuan depression belt is ended in the west Ordos thrust fold belt and meet the decollement layer of Ordos overthrust nappe.All in all,the low resistance layer in the crust of Southern Ningxia arc-shaped structure belt shows the characteristics of the deep southwest and the low northeast.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |