Three dimensional shear wave velocity structure of crust and upper mantle in South China Sea and its adjacent regions by surface waveform inversion
Three dimensional shear wave velocity structure of crust and upper mantle in South China Sea and its adjacent regions by surface waveform inversion
复制标题
DOI：
10.1007/s11589-001-0142-z
复制
发表时间：
2001-03
影响因子：
--
通讯作者：
Xiao-lin Cao;Jie-shou Zhu;Lian‐Feng Zhao;Jia-min Cao;X. Hong
中科院分区：
文献类型：
--
作者：
Xiao-lin Cao;Jie-shou Zhu;Lian‐Feng Zhao;Jia-min Cao;X. Hong
我们收集了大约328个地震记录。数据集来自4个数字记录的CDSN长周期和宽带站。我们进行了基于分割波形反演（PWI）的反演。它将大规模优化问题划分为若干独立的小规模问题。采用等块（2°×2°）离散的地表波形反演方法，获取地壳和上地幔不同深度（地表至430 km）的剪切速度结构图像。所有这些异常都是通过“检查板”分辨率测试确定的。这些结果表明南海与邻近海域在速度、岩石圈和软流圈结构上存在显著差异。
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.