A study on the deep structure of the northern part of southwest sub-basin from ocean bottom seismic data, South China Sea

doi:10.3969/j.issn.0001-5733.2011.12.013

	A study on the deep structure of the northern part of southwest sub-basin from ocean bottom seismic data, South China Sea
	Lu Chuan-Chuan 1; Hao Tian-Yao 1; Qiu Xue-Lin 2; Zhao Ming-Hui 2; You Qing-Yu 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011-12-01
卷号	54 期号:12 页码:3129-3138
关键词	Southwest Sub-basin in South China Sea Ocean bottom seismometer Wide-angle seismic Lithospheric stretching model
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2011.12.013
文献子类	Article
英文摘要	Based on the OBS data and the multi-channel seismic data collected in 2009 and 2011, the structure of crust in the north part of Southwest Sub-basin in the South China Sea is explored. Using two-dimensional ray tracing method to establish P velocity model, employing acoustic basement reflection, the reflections from the top interface of lower crust and the Moho are calculated in order to give the location of the velocity discontinuity interfaces. By employing refraction under the acoustic basement and the head wave from the mantle, the P wave velocity structure of the entire survey line is pictured. The results showed that the depths of the top interface of lower crust and the Moho vary significantly. We inferred the southwest sub-basin rifting model, and concluded that there is a similarity in geological structure between the southwest sub-basin of South China Sea and Iberia-Newfoundland which is a typical non-volcanic margin. It is found that the two end-member mechanical continental rifting models could not satisfactorily explain the southwest sub-basin geological structure, while the elastic beam mechanics model can explain this rifting mode. Although in the lower crust of the northern part of southwest sub-basin there isn't large-scale magmatic activity, we inferred that a small amount of molten material may exist on the top of Moho.
WOS关键词	CRUSTAL STRUCTURE ; MARGIN ; BASIN ; EXTENSION ; TECTONICS ; EVOLUTION ; SOUNDINGS ; PROFILE ; FAULTS ; MODEL
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000298906400013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74318]
专题	中国科学院地质与地球物理研究所
通讯作者	Lu Chuan-Chuan
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Lu Chuan-Chuan,Hao Tian-Yao,Qiu Xue-Lin,et al. A study on the deep structure of the northern part of southwest sub-basin from ocean bottom seismic data, South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(12):3129-3138.
APA	Lu Chuan-Chuan,Hao Tian-Yao,Qiu Xue-Lin,Zhao Ming-Hui,&You Qing-Yu.(2011).A study on the deep structure of the northern part of southwest sub-basin from ocean bottom seismic data, South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(12),3129-3138.
MLA	Lu Chuan-Chuan,et al."A study on the deep structure of the northern part of southwest sub-basin from ocean bottom seismic data, South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.12(2011):3129-3138.