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Tectonic boundaries in the South China Sea from aeromagnetic signature.

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Bibliographic Details
Title:	Tectonic boundaries in the South China Sea from aeromagnetic signature.
Authors:	Luo, Yao¹ geophy@vip.qq.com, Yin, Hang¹, Liu, Qiang¹, Li, Jingmin¹, Liu, Shihua¹, Gao, Wei¹, Li, Rui¹, Yang, Yi¹
Source:	Journal of Oceanology & Limnology. Mar2023, Vol. 41 Issue 2, p550-561. 12p.
Subject Terms:	Geomagnetic maps, Structural geology, Geologic faults, Deconvolution in seismic reflection
Geographic Terms:	South China Sea
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. [ABSTRACT FROM AUTHOR]
Database:	Energy & Power Source

Description
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. [ABSTRACT FROM AUTHOR]
ISSN:	20965508
DOI:	10.1007/s00343-022-2043-z