Physics
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.2661b&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 17, p. 2661-2664
Physics
7
Seismology: Lithosphere And Upper Mantle, Seismology: Body Wave Propagation, Tectonophysics: Continental Tectonics-Extensional, Information Related To Geographic Region: Europe
Scientific paper
To investigate the influence of inherited inhomogeneity in a lithosphere under extension, we studied the deep structure of Corsica, an island in the Mediterranean sea, at the boundary of the extensional Tyrrhenian basin, using a temporary array of eight broad-band seismographs. Between the stations in the western Hercynian part of the island and the stations in eastern Alpine Corsica, an average static station delay of 0.4 s was observed for P waves, and 0.7 s for S waves. The crustal structure is obtained through seismic data, gravity modeling and the receiver function method. The difference in crustal structure between the west and east of Corsica can explain only about half of the anomaly. Consequently we postulate a sharp increment in the thickness of the lithosphere to account for the remaining 0.2 s of P anomaly.
Bertrand Etienne
Béthoux Nicole
Contrucci Isabelle
Deschamps Anne
Ferrandini Jean
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