A high resolution lithospheric magnetic field model over China

• Published in: Science China. Earth sciences Vol. 56; no. 10; pp. 1759 - 1768
• Main Authors: Ou, JiaMing, Du, AiMin, Thébault, E., Xu, WenYao, Tian, XiaoBo, Zhang, TieLong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2013; Springer Nature B.V
• Subjects: China; Earth; Earth and Environmental Science; Earth science; Earth Sciences; Geology; Lithosphere; Magnetic anomalies; Magnetic fields; Mathematical models; Regional; Research Paper; Satellites; 中国; 区域磁异常; 卫星数据; 岩石圈; 平均半径; 建模技术; 磁场模型; 高分辨率; China; China, People's Rep., Xizang, Tibetan Plateau; China, People's Rep., Xinjiang, Tarim Basin; China, People's Rep; CHAMP satellite data; lithospheric magnetic field; revised spherical harmonic cap analysis
• ISSN: 1674-7313; 1869-1897
• DOI: 10.1007/s11430-013-4580-y

CHAMP satellite data and ground-based magnetic observations are used and combined to map the lithospheric magnetic field over China by means of the revised spherical cap harmonic analysis （R-SHCA） modeling technique. The magnetic field is de- scribed to a spatial resolution of 150 km at the mean Earth＇s radius, which represents a good compromise between the resolu- tions afforded by surface and satellite data. We compare the magnetic anomalies modeled at the regional scale with composite regions containing large-scale of tectonic structures. These regions, including the Tarim Basin and the Tibetan Plateau, are correlated with regional magnetic anomalies at satellite altitude but contain a significant number of small-scale and complex magnetic structures at the mean Earth＇s radius. These magnetic anomalies are globally consistent with the known geological features in China but also offer a way to delineate the contours of the geological blocks and to discuss the connection between magnetic anomalies and the heat flow distribution in this region.