Electrical Resistivity Structure of Longmenshan Crust-Mantle under Sector Boundary
详细信息
- 责任者：Wang Xuben (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Luo Wei
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(8)
- 关键词：壳幔作用 ; crust-mantle effect ; 电性结构 ; electrical structure ; 龙门山 ; Longmen Mountains
- 页码：p.2718-2727
- 图表：7 illus., 57 refs.
- 分类号：0400
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
A long peroid magnetotelluric profile along the Luqu-Longmenshan-Hechuan has been finished which helps to study the crust-mantle electrical resisitivity structure in Longmenshan and its adjacent area,Institutive and reasonable 2-D inversion algorithm under sector boundary was adopted.The results of this profile has shown the crust-mantle high resistance belt in Ruergai,Longmenshan,central Sichuan and low resistance belt in Songpan from northwest to southeast.Longmenshan crust-mantle high resistance block shows up as wedge-shaped high resistance block stretching to northwest under the Longmenshan thrust belt.Due to bi-directional compression of East margin of Qinghai-Tibet plateau and upper Yangtze plate,Crust materials of Songpan-Ganzi massifs thrust to Longmenshan,and middle-lower crust and upper mantle slides toward southwest,presenting a trend that west margin of upper Yangtze plate in shape of wedge inserting into east brim of Qinghai-Tibet Plateau.It was initially thought that Songpan crust-mantle ductile shear belt is regarded as the west margin deep boundary of upper Yangtze plate since Mesozoic-Cenozoic Era.
© 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 |