A magnetotelluric study of the deep electric structure beneath the Ordos Block

doi:10.6038/cjg20170515

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	A magnetotelluric study of the deep electric structure beneath the Ordos Block
	Li Chen-Jing 1,2; Bai Deng-Hai 1; Xue Shuai 1,2; Li Xin 1,2; Ma Xiao-Bing 1; Yan Yong-Lie 1; Kong Xiang-Rue 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017-05-01
卷号	60 期号:5 页码:1788-1799
关键词	Ordos Block Hetao Graben Yinshan Belt Magnetotelluric Electric Structure
ISSN号	0001-5733
DOI	10.6038/cjg20170515
文献子类	Article
英文摘要	Recent studies revealed that beneath the northern Ordos Block and Hetao Graben, there is a large-scale low velocity/low resistivity body in lower crust and upper mantle. This challenges the conventional view that Ordos Block is a rigid block with deep root. To understand the deep structures of the study area, a north-south magnetotelluric profile, crossing the whole Ordos Block, Hetao Graben and Yinshan Belt in western North China Craton, was deployed to image the deep electric structures. The 2D and 3D inversions of the profile shows a striking boundary around 38 degrees N. The south part of Ordos Block has a rigid and thick (150 km) cratonic lithosphere with high resistivity; while extensive conductive anomaly exists beneath the north part of Ordos Block and Hetao Graben. The conductive anomaly extends horizontally southward from Hetao Graben to the interior of Ordos Block about 200 km, and down from lower crust to upper mantle about 100 km. According to the spatial features of the conductive complex and by referring to the low velocity anomaly, we suggest that the conductive anomaly might be hot materials in the lower crust and upper mantle, which reflect an undergoing process of reactivation or destruction in deep lithosphere of north Ordos Block and Hetao Graben. This may help further understanding the deep tectonic relationship between the northeastern Tibetan plateau and western North China Craton.
WOS关键词	NORTH CHINA CRATON ; UPPER-MANTLE BENEATH ; RESISTIVITY STRUCTURE ; TIBETAN PLATEAU ; EASTERN CHINA ; CRUST ; INVERSION ; DECOMPOSITION ; CONDUCTIVITY ; DESTRUCTION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000400803000015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/52944]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Bai Deng-Hai
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li Chen-Jing,Bai Deng-Hai,Xue Shuai,et al. A magnetotelluric study of the deep electric structure beneath the Ordos Block[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(5):1788-1799.
APA	Li Chen-Jing.,Bai Deng-Hai.,Xue Shuai.,Li Xin.,Ma Xiao-Bing.,...&Kong Xiang-Rue.(2017).A magnetotelluric study of the deep electric structure beneath the Ordos Block.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(5),1788-1799.
MLA	Li Chen-Jing,et al."A magnetotelluric study of the deep electric structure beneath the Ordos Block".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.5(2017):1788-1799.