Crustal Structure beneath the Xisha Islands of the South China Sea Simulated by the Teleseismic Receiver Function Method

详细信息   

• 责任者：Huang Haibo (Key Laboratory of Marginal Sea Geology ; South China Sea Institute of Oceanology ; Chinese Academy of Sciences ; Guangzhou 510301 ; China) ; Qiu Xuelin
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(11)
• 关键词：crustal structure ; 远震信号 ; teleseismic signals ; 接收函数 ; receiver functions ; 西沙群岛 ; Xisha Islands
• 页码：p.2788-2798
• 图表：9 illus., 1 table, 35 refs.
• 分类号：0400
• 出版序号：20122211
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

1D shear wave velocity models for the crust structure beneath the Xisha Islands of  the South China Sea are constructed using the data from a temporary seismic station at Chenhang island (CHH) and a permanent seismic station at Yongxing island (YXN).  Receiver functions for each station were obtained from teleseismic records with clear P waveforms and a combination of inversion and forward modeling was used to infer the crustal structure below each station. According to the modeling results, the authors suggest that the low-velocity layer in lower crust and the anomalous Poisson’s ratio result from the presence of anisotropy of rocks and minerals which arises from the ductile rheological zone and hot mantle activity in the depth.