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Journal Article

Seismic anisotropy reveals the long route of the slab through the western-central Mediterranean mantle

Authors

Lucente,  Francesco Pio
GEOFON, Deutsches GeoForschungsZentrum;

Margheriti,  Lucia
GEOFON, Deutsches GeoForschungsZentrum;

Piromallo,  Claudia
GEOFON, Deutsches GeoForschungsZentrum;

Barruol,  Guilhem
GEOFON, Deutsches GeoForschungsZentrum;

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Citation

Lucente, F. P., Margheriti, L., Piromallo, C., Barruol, G. (2006): Seismic anisotropy reveals the long route of the slab through the western-central Mediterranean mantle. - Earth and Planetary Science Letters, 241, 517-529.
https://doi.org/10.1016/j.epsl.2005.10.041


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_2908903
Abstract
In the south-eastern corner of the Tyrrhenian basin, in the central Mediterranean Sea, a tight alignment of earthquakes along a well-defined Benioff zone marks one of the narrowest active trenches worldwide, where one of the last fragment of the former Tethys ocean is consumed. Seismic tomography furnishes snapshot images of the present-day position of this slab, and seismic anisotropy allows to reconstruct the past kinematics of the subduction process. Using seismic anisotropy fast directions as a proxy for the present and past mantle flow, we look backward for the seismic traces of the slab motion through the western-central Mediterranean mantle, from the starting locus of subduction toward its present day position. The result of combining independent data sets provides a coherent pattern of anisotropy that illustrates an example of slab rollback from its initiation point to its present-day position.