Tectonic boundaries in the South China Sea from aeromagnetic signature

Yao LUO; Hang YIN; Qiang LIU; Jingmin LI; Shihua LIU; Wei GAO; Rui LI; Yi YANG

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Tectonic boundaries in the South China Sea from aeromagnetic signature

Geomorphology and geological structure of South China Sea | Updated：2024-10-12

- Tectonic boundaries in the South China Sea from aeromagnetic signature
- Journal of Oceanology and Limnology Vol. 41, Issue 2, Pages: 550-561(2023)
- Affiliations：
  
  China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China
- Author bio：
  
  geophy@vip.qq.com
- Funds：
- DOI：
  CLC：
- Received：02 April 2022，
  
  Published：01 March 2023
- Accepted：
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LUO Yao,YIN Hang,LIU Qiang,et al.Tectonic boundaries in the South China Sea from aeromagnetic signature[J].Journal of Oceanology and Limnology,2023,41(02):550-561.
DOI：

LUO Yao,YIN Hang,LIU Qiang,et al.Tectonic boundaries in the South China Sea from aeromagnetic signature[J].Journal of Oceanology and Limnology,2023,41(02):550-561. DOI：

摘要

Abstract

Magnetic data has been widely applied in the tectonic division. High-resolution magnetic data were used to analyze the geotectonic zoning of the South China Sea. Based on the newly compilated magnetic data

the processing results and the distribution of known faults

we consider that the U-shaped line approximately along the South China Sea national boundary of China shown in the magnetic map is a significant geological and geophysical boundary. We first described the linear characteristics of the magnetic data and then applied pseudo-gravity

Euler deconvolution

tilt derivatives

and the texture segmentation method to process the data. Results show that the dividing line between the South China Sea and the surrounding blocks is approximately along this U-shaped line. The dividing line between the South China domain and the South China Sea domain is along with the Dongsha Islands to Xisha Trough

which is different from the previous geophysical zoning results. Our results are almost consistent with those of the gravity data indicating roughly the tectonic zonation along the U-shaped line.

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references

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