Earthquake-controlling processes of detachment zones in eastern North China

	Earthquake-controlling processes of detachment zones in eastern North China
	Sun, AQ ; Niu, SY ; Shao, J ; Hou, QL ; Zhang, JZ
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2004
卷号	78 期号:1 页码:283-290
关键词	Sub-mantle Plume Detachment Belt Earthquake-controlling Structure Low-velocity And High-conductivity Zones North China Basin-and Range Area
ISSN号	1000-9515
文献子类	Article
英文摘要	The basin-and-range area in eastern North China is known for frequent occurrence of earthquakes, their great magnitudes and heavy losses thereby incurred. Seismic studies in the past usually emphasized the intersections, inflexions and branches of the faults. However, the intensities of many great earthquakes in this area do not show linear distribution, and the epicenters are horizontally dispersed at certain depths instead of along the strike of faults. Based on the sub-mantle plume studies made by authors in the past decade, it is thought that there exists an uplifted sub-mantle plume under the fault depression area in North China. The uplifting and intrusion of mantle materials caused the upper crust to be faulted, while low-velocity and high-velocity layers are alternatively distributed in the middle crust under the influence of the mantle and the lower crust. The middle and lower crust materials were detached from the top of the submantle plume to the surroundings while the sub-mantle plume materials were detached outward. When the detached middle and lower crust come to the boundary of fault basins in the upper crust, they will be obstructed by the orogenic zone and the detachment will go slower. The shearing between them will cause the stress to accumulate and release alternatively, so that earthquakes occurred frequently in the areas of sub-mantle plume and its surroundings.
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000221717300035
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64588]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun, AQ
作者单位	1.Shijiazhuang Coll Econ, Shijiazhuang 050031, Hebei, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Sun, AQ,Niu, SY,Shao, J,et al. Earthquake-controlling processes of detachment zones in eastern North China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2004,78(1):283-290.
APA	Sun, AQ,Niu, SY,Shao, J,Hou, QL,&Zhang, JZ.(2004).Earthquake-controlling processes of detachment zones in eastern North China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,78(1),283-290.
MLA	Sun, AQ,et al."Earthquake-controlling processes of detachment zones in eastern North China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 78.1(2004):283-290.