Tectonic boundaries in the South China Sea from aeromagnetic signature -- Journal of Oceanology and Limnology,2023,41(2):550-561

	Cite this paper:
	Yao Luo, Hang Yin, Qiang Liu, Jingmin Li, Shihua Liu, Wei Gao, Rui Li, Yi Yang. Tectonic boundaries in the South China Sea from aeromagnetic signature[J]. Journal of Oceanology and Limnology, 2023, 41(2): 550-561

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

China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing, 100083, China

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.

Key words: South China Sea|U-shaped line|tectonic zoning|aeromagnetic map|texture segmentation

Received: 2022-04-02 Revised:

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Articles by Yao Luo

Articles by Hang Yin

Articles by Qiang Liu

Articles by Jingmin Li

Articles by Shihua Liu

Articles by Wei Gao

Articles by Rui Li

Articles by Yi Yang

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