Azimuthally anisotropic seismic ambient noise tomography of South China block
文献类型：期刊论文
| 作者 | Guo, Zhi1; Gao, Xing2 |
| 刊名 | TECTONOPHYSICS
 |
| 出版日期 | 2022-01-20 |
| 卷号 | 823页码:12 |
| 关键词 | Seismic noise Seismic interferometry Seismic tomography Seismic anisotropy Surface waves Crustal imaging |
| ISSN号 | 0040-1951 |
| DOI | 10.1016/j.tecto.2021.229187 |
| 通讯作者 | Gao, Xing(gxing@igsnrr.ac.cn) |
| 英文摘要 | Situated in the far southeastern corner of the Eurasian plate, the South China block is traditionally considered to be created by the collision/amalgamation of the Yangtze craton and Cathaysia terrane. In this study, we use the continuous seismic ambient noise, recorded by dense permanent seismic stations deployed across South China, to image the isotropic and azimuthal anisotropic crustal structure of the South China block. In the short period (5-10s), which is most sensitive to the upper crustal structure, the lateral changes in the isotropic crustal structure show good agreement with surface geology, with lower velocities being associated with major sedimentary basins. More details about the tectonic evolution of the South China block are revealed by the lateral and vertical variations in azimuthal anisotropy. Spatial variations in isotropic model and model with azimuthal anisotropy have been observed across the Jiangshan-Shaoxing fault, related to the crustal suture zone between the Yangtze craton and Cathaysia terrane. The azimuthal anisotropy at short periods (5-10 s) shows a fast-propagation direction broadly parallel to the suture zone. This might reflect folding, thrusting, metamorphism structures, and basin-mountain foreland deformation system created by the intense crustal deformation due to the Yangtze craton colliding with Cathaysia terrane and following multiphase tectonic activities. |
| WOS关键词 | S-WAVE VELOCITY ; STRUCTURE BENEATH ; CRUSTAL ; ROCKS ; OROGEN |
| 资助项目 | National Natural Science Foundation of China[41774050] ; National Natural Science Foundation of China[41574036] ; National Natural Science Foundation of China[41374061] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000770876700003 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/173349]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Gao, Xing |
| 作者单位 | 1.China Earthquake Adm, Inst Geol, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Zhi,Gao, Xing. Azimuthally anisotropic seismic ambient noise tomography of South China block[J]. TECTONOPHYSICS,2022,823:12. |
| APA | Guo, Zhi,&Gao, Xing.(2022).Azimuthally anisotropic seismic ambient noise tomography of South China block.TECTONOPHYSICS,823,12. |
| MLA | Guo, Zhi,et al."Azimuthally anisotropic seismic ambient noise tomography of South China block".TECTONOPHYSICS 823(2022):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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