Crustal structure beneath South China revealed by deep seismic soundings and its dynamics implications

doi:10.3969/j.issn.0001-5733.2011.10.013

	Crustal structure beneath South China revealed by deep seismic soundings and its dynamics implications
	Deng Yang-Fan 1,2; Li Shou-Lin 2,3; Fan Wei-Ming 1; Liu Jia 2,3
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011-10-01
卷号	54 期号:10 页码:2560-2574
关键词	South China Deep seismic sounding 3-D velocity structure Moho Pn velocity
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2011.10.013
文献子类	Article
英文摘要	Since the 1970s, 57 DSS profiles have been carried out in South China. In this paper we collect all DSS profiles in South China, construct the 3-D crust velocity model in the region (100 degrees E similar to 125 degrees E and 18 degrees N similar to 34 degrees N) using robust 3-D Kriging interpolation method. We discuss the spatial distribution of Moho depth and Pn velocity in detail; analyze the relationship between average velocity and thickness in tectonic units; investigate the crust character and the subduction direction of Pacific plate to Eurasian plate. The results show that: (1) the average Moho depth of Yangtze block is about 40 km, the average crust velocity is 6.30 km/s, while the Moho depth of Cathaysia block is about 32 km, the average velocity is 6.24 km/s; (2) Sichuan basin has the same character as continental platforms in the world, Cathaysia block has the character of extended continent, Taiwan has the character of continental arcs; (3) the average Pn velocity is 8.02 km/s in Cathaysia block 7.98 km/s in Taiwan orogen, and 7.94 km/s in Yangtze block, including the fastest 8.02 km/s in Sichuan basin and the slowest 7.75 km/s in east Songpan-Ganzi. Chuandian area and east Songpan-Ganzi is relatively active, while Sichuan basin and Cathaysia block are steady; (4) the subduction direction of Pacific plate to Eurasian plate should be NW-SE.
WOS关键词	NORTHERN CONTINENTAL-MARGIN ; WAVE VELOCITY STRUCTURE ; QIONGDONGNAN BASIN ; PROFILE ; SEA ; TAIWAN ; AREA ; REFLECTION/REFRACTION ; FEATURES ; PROVINCE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000296410000013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74630]
专题	中国科学院地质与地球物理研究所
通讯作者	Deng Yang-Fan
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Deng Yang-Fan,Li Shou-Lin,Fan Wei-Ming,et al. Crustal structure beneath South China revealed by deep seismic soundings and its dynamics implications[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(10):2560-2574.
APA	Deng Yang-Fan,Li Shou-Lin,Fan Wei-Ming,&Liu Jia.(2011).Crustal structure beneath South China revealed by deep seismic soundings and its dynamics implications.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(10),2560-2574.
MLA	Deng Yang-Fan,et al."Crustal structure beneath South China revealed by deep seismic soundings and its dynamics implications".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.10(2011):2560-2574.