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The crustal structure beneath the Shidao station on Xisha Islands of South China Sea
Qiu, XL; Zeng, GP; Xu, Y; Hao, TY; Li, ZX; Priestley, K; McKenzie, D; xlqiu@scsio.ac.cn
2006
发表期刊CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
卷号49期号:6页码:1720-1729
摘要We installed a temporary earthquake station at Shidao on Xisha Islands of South China Sea to study the seismicity and lithospheric structure of the region, and carried out the observation experiment for more than one year. Although the seismic data in reef and island areas have relatively large background noise, especially during the passage of a tropical cyclone, earthquakes above M-W 6 can still be recorded. In this paper, those teleseismic records with clear P waveforms are chosen to carry out receiver function analysis and modeling. A simple crustal structure model beneath the station is obtained, in which the Moho depth is 28 km. On the top of the upper crust is a 2 km-thick low velocity layer with a shear wave velocity of only 2.3 km/s. The shear wave velocity increases gradually with depth to 3.8 km/s in the lower crust. We compared this model with previous results and discovered that the models of Shidao Station and Qiongzhong Station (QIZ) are the natural extensions of the Xisha Trough section. The crustal structure of Xisha Block consists of thinned continental crust, with a velocity structure that is similar to the normal continental crust of South China Block.
部门归属Chinese Acad Sci, S China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Peoples R China; Earthquake Adm Hainan Prov, Haikou 570203, Peoples R China; Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China; Univ Cambridge, Bullard Labs, Cambridge CB3 0EZ, England
关键词South China Sea Xisha Islands Shidao Station Teleseismic Receiver Function Crustal Velocity Structure
学科领域Geochemistry & Geophysics
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收录类别sci
资助项目海洋地质
WOS记录号WOS:000242388600019
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4388
专题中科院边缘海地质重点实验室
通讯作者xlqiu@scsio.ac.cn
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GB/T 7714
Qiu, XL,Zeng, GP,Xu, Y,et al. The crustal structure beneath the Shidao station on Xisha Islands of South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2006,49(6):1720-1729.
APA Qiu, XL.,Zeng, GP.,Xu, Y.,Hao, TY.,Li, ZX.,...&xlqiu@scsio.ac.cn.(2006).The crustal structure beneath the Shidao station on Xisha Islands of South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,49(6),1720-1729.
MLA Qiu, XL,et al."The crustal structure beneath the Shidao station on Xisha Islands of South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49.6(2006):1720-1729.
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