Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Global maps of the magnetic thickness and magnetization of the Earth’s lithosphere


Vervelidou,  Foteini
2.3 Earth's Magnetic Field, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Thébault,  Erwan
External Organizations;

External Ressource
No external resources are shared
Fulltext (public)

(Publisher version), 4MB

Supplementary Material (public)
There is no public supplementary material available

Vervelidou, F., Thébault, E. (2015): Global maps of the magnetic thickness and magnetization of the Earth’s lithosphere. - Earth Planets and Space, 67, 173.

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_1397954
We have constructed global maps of the large-scale magnetic thickness and magnetization of Earth’s lithosphere. Deriving such large-scale maps based on lithospheric magnetic field measurements faces the challenge of the masking effect of the core field. In this study, the maps were obtained through analyses in the spectral domain by means of a new regional spatial power spectrum based on the Revised Spherical Cap Harmonic Analysis (R-SCHA) formalism. A series of regional spectral analyses were conducted covering the entire Earth. The R-SCHA surface power spectrum for each region was estimated using the NGDC-720 spherical harmonic (SH) model of the lithospheric magnetic field, which is based on satellite, aeromagnetic, and marine measurements. These observational regional spectra were fitted to a recently proposed statistical expression of the power spectrum of Earth’s lithospheric magnetic field, whose free parameters include the thickness and magnetization of the magnetic sources. The resulting global magnetic thickness map is compared to other crustal and magnetic thickness maps based upon different geophysical data. We conclude that the large-scale magnetic thickness of the lithosphere is on average confined to a layer that does not exceed the Moho.