THREE DIMENSIONAL SHEAR WAVE VELOCITY STRUCTURE OF CRUST AND UPPER MANTLE IN SOUTH CHINA SEA AND ITS ADJACENT REGIONS BY SURFACE WAVEFORM INVERSION
Cao Xiaolin
Zhu Jieshou
Zhao Lianfeng
Cao Jiamin
Hong Xuehai
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” sensitivity tests. These results show significant difference in velocity, lithosphere and asthenosphere structure between South China Sea and its adjacent regions.
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Publication Date：2001-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 113-124 )