摘要
本文采用适配滤波频时分析技术对中国数字地震台网记录的长周期面波资料进行处理,获得了路经中国大陆的23条波路径的基阶瑞雷面波群速度频散曲线,频散曲线的周期从10.5秒至150秒。使用HARKRIDER面波反演程序反演了各条波路径的平均地壳上地幔结构。所得模型直至230km。深处仍有较好的分辨。根据所得结果将中国大陆划分为四个构造单元。各构造单元之间差异明显且在某些单元内部横向变化也很显著。
The adaptive filtering frequency-time analysis is used to process the long-term surface wave data recorded by China Digital-Network in this paper. The frequency scattering curves of fundamental Rayieigh wave group velocity travelled along 23 wave paths in China continent are obtained, with periods ranging 10.5-150 s. The average upper mantle structure along those wave paths is reversed by the Harkrider Program. The obtained model presents a better resolution as deep as 230 km downwards. Based on the obtained results China continent has been divided into 4 structural units, between which there exist striking differences and also within some of which there exists an obvious lateral variation.
出处
《地震研究》
CSCD
北大核心
1991年第3期239-246,共8页
Journal of Seismological Research
基金
地震联合基金
关键词
面波
大陆
地壳
上地幔
数字台网
Surface wave
Group velocity
Frequency scattering
Reversion
Crust
Upper mantle
