Journal
SCIENCE CHINA-EARTH SCIENCES
Volume 56, Issue 10, Pages 1759-1768Publisher
SCIENCE PRESS
DOI: 10.1007/s11430-013-4580-y
Keywords
lithospheric magnetic field; revised spherical harmonic cap analysis; CHAMP satellite data
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Funding
- Federal Ministry of Education and Research (BMBF)
- National Natural Science Foundation of China [41174122, 40890163, 41031066]
- OPWSRP [201005017]
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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 described to a spatial resolution of 150 km at the mean Earth's radius, which represents a good compromise between the resolutions 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.
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