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The South China Sea is one of the largest marginal seas in the Western Pacific, and its tectonic evolution model has always been a research hotspot in Earth system science
The researchers collected 12 two-dimensional active source OBS velocity structure profiles in the northeastern part of the South China Sea , carried out data normalization, unified the coordinate system, and unified the stratification standard; then, using the Kriging interpolation method, established the standard for the northeastern part of the South China Sea.
This study collected and integrated 12 deep seismic survey lines in the northeastern part of the South China Sea , and constructed a quasi-three-dimensional velocity structure model, providing new ideas for areas lacking three-dimensional data research
This research was supported by the National Natural Science Foundation of China ( 91958212, 41730532, U20A20100, 41606064 ), the Open Fund of the Key Laboratory of Marginal Seas and Ocean Geology of the Chinese Academy of Sciences (OMG2020-07), and the talent team of Guangdong Laboratory of Southern Ocean Science and Engineering (Guangzhou) Introduce a major project ( GML2019ZD0204 ), jointly funded by the Guangdong Basic and Applied Basic Research Fund ( 2019A1515110834 )
Related paper information: https://doi.
Figure 1 Location map of the two-dimensional deep seismic survey section in the northeastern part of the South China Sea
DSR: Dongsha Uplift CSD: Chaoshan Depression SWTB: Southwestern Taiwan Basin HR: Hengchun Ridge NLT: Northern Luzon Trough COB: Ocean and Land Boundary
The survey lines in the figure are OBS2001 ( Wang et al.
Figure 2 Spatial distribution of quasi-three-dimensional velocity structure
(a) Distribution map of sedimentary layer thickness; (b) Distribution map of crustal thickness; (c) Distribution map of upper crust thickness; (d) Distribution map of lower crustal thickness
Figure 3 Distribution map of the thickness (a) and magnetic anomaly characteristics (b) of the lower crustal high-speed body in the northeastern part of the South China Sea
