Crustal structure of shear waves and its tectonic significance in the mid-northern continental margin of the South China Sea

doi:10.3969/j.issn.0001-5733.2011.12.015

	Crustal structure of shear waves and its tectonic significance in the mid-northern continental margin of the South China Sea
	Wei Xiao-Dong 1,2,4; Zhao Ming-Hui 1; Ruan Ai-Guo 2; Qiu Xue-Lin 1; Hao Tian-Yao 3; Wu Zhen-Li 2; Ao Wei 1,4; Xiong Hou 1,4
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011-12-01
卷号	54 期号:12 页码:3150-3160
关键词	Ocean Bottom Seismometer (OBS) Converted S-wave V(p)/V(s) ratio High velocity layer in the lower crust
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2011.12.015
文献子类	Article
英文摘要	The joint exploration of P-wave and S-wave can obtain amount of information on lithology and geophysical properties, which effectively improve the composition constraint of the deep crustal structure. Based on the optimum P-wave model, the shear waves recorded on the radial components of profile OBS2006-3 have been modeled by 2-D ray-tracing. The S-wave velocities in sedimentary layer 1 and sedimentary layer 2 are of 0. 7 similar to 0. 9 km/s and 1. 6 similar to 1. 7 km/s, respectively. The V(p)/V(s) ratios in these sediments vary from 2. 64 similar to 3. 16 to 2. 41. The relatively high V(p)/V(s) ratios are probably related to unconsolidated sediments. In the Mesozoic sedimentary layer, the S-wave velocity increases gradually from 2. 6 km/s at the top to 3. 0 km/s at the bottom, and the V(p)/V(s) ratio is of 1. 74 similar to 1. 80. The V(p)/V(s) ratio of 1. 74 similar to 1. 82 in the crust is considered to be the continental crust. The S-wave velocity and V(p)/V(s) are 4. 0 similar to 4. 2 km/s and 1. 73 similar to 1. 78 of the High Velocity Layer (HVL) in the lower crust, which suggest that the HVL has a mafic composition that may originate from underplating of the igneous rocks after the cessation of the seafloor spreading.
WOS关键词	NORTHEASTERN MARGIN ; VELOCITY STRUCTURE ; TIBETAN PLATEAU ; BASIN ; PROFILE ; NORWAY ; RATIO
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000298906400015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74138]
专题	中国科学院地质与地球物理研究所
通讯作者	Wei Xiao-Dong
作者单位	1.Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 2.State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wei Xiao-Dong,Zhao Ming-Hui,Ruan Ai-Guo,et al. Crustal structure of shear waves and its tectonic significance in the mid-northern continental margin of the South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(12):3150-3160.
APA	Wei Xiao-Dong.,Zhao Ming-Hui.,Ruan Ai-Guo.,Qiu Xue-Lin.,Hao Tian-Yao.,...&Xiong Hou.(2011).Crustal structure of shear waves and its tectonic significance in the mid-northern continental margin of the South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(12),3150-3160.
MLA	Wei Xiao-Dong,et al."Crustal structure of shear waves and its tectonic significance in the mid-northern continental margin of the South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.12(2011):3150-3160.