| Three dimensional shear wave velocity structure of crust and upper mantle in South China Sea and its adjacent regions by surface waveform inversion |
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| 作者姓名： | 曹小林 朱介寿 赵连锋 曹家敏 洪学海 |
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| 作者单位： | CAO Xiao-lin1) ZHU Jie-shou2) ZHAO Lian-feng2) CAO Jia-min2) HONG Xue-hai2) 1) School of Computer Science，National University of Defense Technology，Changsha 410073，China 2) Chengdu University of Technology，Chengdu 610059，China |
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| 基金项目： | State Natural Scientific Foundation (49734150) and National High Performance Computation Foundation. |
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| 摘 要： | IntroductionHistorically, surface waves provided much of our understanding of the lateral heterogeneity in the crust and the upper mantle, especially in oceans or desert areas. Traditional method utilizes the great circle theorem for surface waves. It assumed that surface wave propagates along the great circle connecting epicenter with station. Firstly, traditional surface wave analysis was carried out by using multi-frequency-filter dispersion analysis to acquire the group or phase velocity d…
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| 收稿时间： | 21 December 1999 |
| 修稿时间： | 11 September 2000 |
Three dimensional shear wave velocity structure of crust and upper mantle in South China Sea and its adjacent regions by surface waveform inversion |
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| CAO Xiao-lin,ZHU Jie-shou,ZHAO Lian-Feng,CAO Jia-min,HONG Xue-hai.Three dimensional shear wave velocity structure of crust and upper mantle in South China Sea and its adjacent regions by surface waveform inversion[J].Acta Seismologica Sinica(English Edition),2001,14(2):117-128. |
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| Authors: | CAO Xiao-lin ZHU Jie-shou ZHAO Lian-Feng CAO Jia-min HONG Xue-hai |
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| Institution: | 1. School of Computer Science, National University of Defense Technology,
2. Chengdu University of Technology, |
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| Abstract: | We assembled approximately 328 seismic records. The data set was from 4 digitally recording long-period and broadband stations of CDSN. We carried out the inversion based on the partitioned waveform inversion (PWI). It partitions the large-scale optimization problem into a number of independent small-scale problems. We adopted surface waveform inversion with an equal block (2((2() discretization in order to acquire the images of shear velocity structure at different depths (from surface to 430 km) in the crust and upper-mantle. The resolution of all these anomalies has been established with (check-board( resolution tests. These results show significant difference in velocity, lithosphere and asthenosphere structure between South China Sea and its adjacent regions. |
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| Keywords: | South China Sea surface waveform partitioned waveform inversion three dimension shear wave velocity structure |
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