Fine velocity structures and deep processes in crust and mantle of the Qinling orogenic belt and the adjacent North China craton and Yangtze craton

doi:10.6038/cjg20141006

	Fine velocity structures and deep processes in crust and mantle of the Qinling orogenic belt and the adjacent North China craton and Yangtze craton
	Teng Ji-Wen 1; Li Song-Ling 2; Zhang Yong-Qian 1; Wang Fu-Yun 2; Pi Jiao-Long 1; Zhao Jin-Ren 2; Zhang Cheng-Ke 2; Qiao Yong-Hu 1; Hu Guo-Ze 1; Yan Ya-Fen 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2014-10-01
卷号	57 期号:10 页码:3154-3175
关键词	Qinling-Daba orogenic belt Crystalline basement Seismic wave field Fine structure of crust and upper mantle Deep process
ISSN号	0001-5733
DOI	10.6038/cjg20141006
文献子类	Article
英文摘要	The three tectonic units, Qinling-Daba orogenic belt, North China craton and Yangtz craton, are very complicated in whether each tectonic unit system or each boundary structure. Restricted by many times of tectonic movements, the Qinling orogen and its adjacent areas have experiencedspecial orogenic processes of continental interior. Although some related work has been done in this area, there are little studies on the fine structure and deep dynamical processesin the crust and mantle and, particularly for the system coupling research of the North China craton, QinLing-Daba orogenic belt and Yangtze craton. In order to fill this gap, we deployeda high-precision wide-angle seismic reflection and refraction wave field exploration survey profile across this region. It began from Yulin north of Ningshan in the north and extended southward to Fuling with a length of 1000 km. Through high-resolution data acquisition, inversion and characterization of the crust and mantle fine velocity structure, we found the specific velocity structure of deep crust and mantle along the profile and obtain the following new knowledge. (1) With the same basement, the Qinling-Daba orogenic belt was resulted from the uplift of the crystalline basement. In other words, the formation of the orogen was only related to the forced deformation and the spatial state of the upper crust. The orogenic belt and its forelands of the both sides were the products of the same deep process in the intracontinental orogenic process, while local uplift of the Moho interface led to the extension of the foreland basin B-fc between the North China craton and Qinling orogen. (2) The continuous sedimentary formation, crystalline basement, upper crust, lower crust, interval velocity structure and block velocity structure of uppermost mantle, relief change and space state at each interface are first put forward along the 1000 km long profile. We define the partition zones among the North China craton, Qinling-Daba orogenic belt and Yangtze craton on the basis of the seismic wave boundary response. In this paper, we also discuss internal structures of the three tectonic units and the velocity variation features of the adjacent areas. (3) There are significant differences between the North China craton, Qinling-Daba orogen and Yangtze craton in velocity structure of the continental area, Q structure, distribution of different faults and sequences. The distribution of the faults with varied scales, depths and attitudes displays the marked differencesin theirformation, deformation behavior, mechanisms and constraints by tectonic movements.
WOS关键词	VARYING LAYERED STRUCTURES ; BODY WAVE SEISMOGRAMS ; SYNTHETIC SEISMOGRAMS ; CRYSTALLINE BASEMENT ; INHOMOGENEOUS-MEDIA ; COMPUTATION ; SYSTEM ; REFLECTION ; FIELDS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000344039800006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85690]
专题	中国科学院地质与地球物理研究所
通讯作者	Teng Ji-Wen
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.China Earthquake Adm, Geophys Explorat Ctr, Zhengzhou 450002, Peoples R China
推荐引用方式 GB/T 7714	Teng Ji-Wen,Li Song-Ling,Zhang Yong-Qian,et al. Fine velocity structures and deep processes in crust and mantle of the Qinling orogenic belt and the adjacent North China craton and Yangtze craton[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(10):3154-3175.
APA	Teng Ji-Wen.,Li Song-Ling.,Zhang Yong-Qian.,Wang Fu-Yun.,Pi Jiao-Long.,...&Yan Ya-Fen.(2014).Fine velocity structures and deep processes in crust and mantle of the Qinling orogenic belt and the adjacent North China craton and Yangtze craton.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(10),3154-3175.
MLA	Teng Ji-Wen,et al."Fine velocity structures and deep processes in crust and mantle of the Qinling orogenic belt and the adjacent North China craton and Yangtze craton".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.10(2014):3154-3175.