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  2. 地质与地球物理研究所
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Sedimentary structure of the Sichuan Basin derived from seismic ambient noise tomography

文献类型：期刊论文

作者Xia, Xin1,2,3; Li, Zhiwei4; Bao, Feng5; Xie, Jun5; Shi, Yutao6; You, Qingyu1,2; Chen, Haopeng7
刊名GEOPHYSICAL JOURNAL INTERNATIONAL
出版日期2021-04-01
卷号225期号:1页码:54-67
关键词Crustal imaging Earthquake ground motions Seismic noise Seismic tomography
ISSN号0956-540X
DOI10.1093/gji/ggaa578
英文摘要Determining a detailed 3-D velocity model with high resolution for the sedimentary layer in the Sichuan Basin is potentially beneficial both to the industrial oil/gas exploration and earthquake hazards' mitigation. In this study, we apply the ambient noise tomography method to construct a 3-D S-wave velocity model. This model focuses on the sedimentary layer of the Sichuan Basin, with a 0.3 degrees x 0.3 degrees grid precision. Dispersion curves of both group and phase velocities of Rayleigh wave at 4 to 40 s periods are utilized, which are extracted from 87 broad-band stations in the Sichuan Basin and the surrounding areas. The 3-D model reveals a thick sedimentary layer of the Sichuan Basin with S-wave velocity ranging from similar to 2.0 to 3.4 km s(-1). The sediment thickness in the margins of the Sichuan Basin is generally greater than the typical values of 6-10 km in the central areas due to surrounding orogenic activities, with a maximum depth of similar to 13 km in the northwestern margin. Moreover, a prominent low S-wave velocity anomaly in the margins may be caused by the sediment accumulations from large-scale landslides and pronounced denudation of the surrounding orogenic belts. Major geologic units in the sedimentary layer are delineated in this study. The S-wave velocity values within each geologic unit and their bottom interfaces are obtained. Based on our model, we calculate synthetic ground motions for the 2013 Lushan earthquake and obtain the distribution of the peak ground acceleration from the earthquake epicentre to the western Sichuan Basin. The result clearly illustrates the basin amplification effect on the seismic waves.
资助项目China Seismic Experimental Site[2019CSES0102] ; China Seismic Experimental Site[2018YFC1504202] ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration[2017IES0402] ; [NSFC41974064] ; [NSFC41674065] ; [NSFC41806083]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000646864000004
出版者OXFORD UNIV PRESS
资助机构China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; China Seismic Experimental Site ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration ; Basic Research Fund of the Institute of Earthquake Forecasting, China Earthquake Administration
源URL[http://ir.iggcas.ac.cn/handle/132A11/101143]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Li, Zhiwei
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Beijing Inst Spacecraft Environm Engn, Sci & Technol Reliabil & Environm Engn Lab, Beijing 100094, Peoples R China
5.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China
6.China Earthquake Adm, Inst Earthquake Forecasting, Beijing 100036, Peoples R China
7.Huazhong Univ Sci & Technol, Sch Phys, Inst Geophys, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Xia, Xin,Li, Zhiwei,Bao, Feng,et al. Sedimentary structure of the Sichuan Basin derived from seismic ambient noise tomography[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2021,225(1):54-67.
APA Xia, Xin.,Li, Zhiwei.,Bao, Feng.,Xie, Jun.,Shi, Yutao.,...&Chen, Haopeng.(2021).Sedimentary structure of the Sichuan Basin derived from seismic ambient noise tomography.GEOPHYSICAL JOURNAL INTERNATIONAL,225(1),54-67.
MLA Xia, Xin,et al."Sedimentary structure of the Sichuan Basin derived from seismic ambient noise tomography".GEOPHYSICAL JOURNAL INTERNATIONAL 225.1(2021):54-67.

入库方式： OAI收割

来源：地质与地球物理研究所

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