Sachpazi M., Hirn A., Clément C., Haslinger F., Laigle M., Kissling E., Charvis Philippe, Hello Yann, Lépine J.C, Sapin M., Ansorge J. (2000). Western Hellenic subduction and Cephalonia transform : local earthquakes and plate transport and strain. Tectonophysics, 319, 301-319. ISSN 0040-1951.
Titre du document
Western Hellenic subduction and Cephalonia transform : local earthquakes and plate transport and strain
Année de publication
2000
Auteurs
Sachpazi M., Hirn A., Clément C., Haslinger F., Laigle M., Kissling E., Charvis Philippe, Hello Yann, Lépine J.C, Sapin M., Ansorge J.
Source
Tectonophysics, 2000,
319, 301-319 ISSN 0040-1951
Focal parameters of local earthquakes in the region of the Ionian Islands of western Greece are constrained with a temporary dense array of three-component seismographs operated jointly offshore and onshore. Seismic deformation is documented to be confined to the east of the N20°-E-striking seep continental slope west of Cephalonia island, the right-lateral Cephalonia Transform Fault, CTF, inferred from large earthquakes. The pre-apulian continental material appears to be only deforming east of the transform fault, where it is in upper plate position to the Hellenic subduction. East of the transform fault, the transmission velocity tomography from local earthquakes, compared in depth-section with a previous marine reflection profile, provides evidence in support of a shallow landward dipping boundary around 12km deep under the Ionian Islands along which they may override the lower plate. On either side of this interface local earthquakes occur with different focal mechanisms, in support with its interpretation as the interplate. Under Cephalonia island, reverse-faulting deforms the upper plate along NW-SE structures, which may also be affected by left-lateral bookshelf-faulting. Small earthquakes show normal faulting along the western coast of Cephalonia and its extension 20 km SSW, the trace of the CTF as inferred from the occurrence of the large strike-slip earthquakes. Another group of normal-fault earthquakes locates in the lower plate from under Cephalonia to Zante, just outboard of a possible change of interplate dip suggested from reflection seismics landward under the islands... (D'après résumé d'auteur)
Plan de classement
Tectonique [064TECTO]
;
Sismologie [066SISMO]
Descripteurs
SISMOTECTONIQUE ; SUBDUCTION ; CONVERGENCE ; TECTONIQUE DE PLAQUES ; FAILLE TRANSFORMANTE ; SEISME ; SISMIQUE A REFLEXION
Description Géographique
GRECE
Localisation
Fonds IRD [F B010024201]
Identifiant IRD
fdi:010024201
