Toroidal mantle flow around the Calabrian slab (Italy) from SKS splitting

Details Toroidal mantle flow around the Calabrian slab (Italy) from SKS splitting Toroidal mantle flow around the Calabrian slab (Italy) from SKS splitting

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110601c&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 10, CiteID L10601

Physics

20

Seismology: Body Wave Propagation, Seismology: Lithosphere And Upper Mantle, Tectonophysics: Dynamics Of Lithosphere And Mantle-General, Tectonophysics: Plate Boundary-General (3040), Information Related To Geographic Region: Europe

Scientific paper

SKS-wave birefringence is likely caused by ongoing and/or fossil mantle flow. Splitting parameters in the southern Tyrrhenian subduction zone define a quite complex pattern of fast directions with large delay times up to 2.7 s. Fast directions are prevalently trench parallel below the slab and rotate to trench normal at the western edge of the slab depicting a ring around it. We interpret these anisotropic patterns, also observed in laboratory experiment, as toroidal mantle flow induced by rollback subduction.

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