3-D shear wave radially and azimuthally anisotropic velocity model of the North American upper mantle | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  3-D shear wave radially and azimuthally anisotropic velocity model of the North American upper mantle

Type de publication:

Journal Article

Source:

Geophysical Journal International, Volume 184, Ticket 3 (2011)

ISBN:

0956-540X

Numéro d'accès:

WOS:000287362500017

Mots-clés:

UMR 7154 ; Sismologie ; Seismic anisotropy; Seismic tomography; Cratons; North America

Résumé:

Using a combination of long period seismic waveforms and SKS splitting measurements, we have developed a 3-D upper-mantle model (SAWum_NA2) of North America that includes isotropic shear velocity, with a lateral resolution of ∼250 km, as well as radial and azimuthal anisotropy, with a lateral resolution of ∼500 km. Combining these results, we infer several key features of lithosphere and asthenosphere structure.