A high resolution lithospheric magnetic field model over China | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  A high resolution lithospheric magnetic field model over China

Type de publication:

Journal Article

Source:

Science China-Earth Sciences, Volume 56, Ticket 10, p.1759-1768 (2013)

ISBN:

1674-7313

URL:

http://link.springer.com/article/10.1007%2Fs11430-013-4580-y

Mots-clés:

UMR 7154 ; Géomagnétisme

Résumé:

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.

Notes:

Times Cited: 0 Thebault, Erwan/A-5670-2011 0