Seismic Exploration of the Deep Structure and Seismogenic Faults in the Ligurian Sea by Joint Multi Channel and Ocean Bottom Seismic Acquisitions: Preliminary Results of the SEFASILS Cruise - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Geosciences Année : 2020

Seismic Exploration of the Deep Structure and Seismogenic Faults in the Ligurian Sea by Joint Multi Channel and Ocean Bottom Seismic Acquisitions: Preliminary Results of the SEFASILS Cruise

Jean-Xavier Dessa
Marie-Odile Beslier
Laure Schenini
Jacques Déverchère
Christophe Larroque
Serge Sambolian
Albane Canva
Stéphane Operto
Alessandra Ribodetti
  • Fonction : Auteur
Hans Agurto-Detzel
  • Fonction : Auteur
Cédric Bulois
Caroline Chalumeau
Laure Combe
  • Fonction : Auteur
  • PersonId : 752975
  • IdHAL : laure-combe

Résumé

The north Ligurian margin is a complex geological area in many ways. It has witnessedseveral phases of highly contrasting deformation styles, at both crustal scale and that of shallower covertectonics, simultaneously or in quick succession, and with significant spatial variability. This complexinterplay is mirrored in the resulting intricate structures that make it hard to identify active faultsresponsible for both, the significant seismicity observed, and the tectonic inversion undergone bythe margin, identified at longer time scales on morphostructural grounds. We present here the firstpreliminary results of the leg 1 of SEFASILS cruise, conducted in 2018 offshore Monaco, in an effort toanswer these questions by means of modern deep seismic acquisitions, using multichannel reflectionand wide-angle sea-bottom records. Some first interpretations are provided and point towards anactive basement deformation that focuses at the limits between main crustal domains.
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hal-02524420 , version 1 (20-09-2020)

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Jean-Xavier Dessa, Marie-Odile Beslier, Laure Schenini, Nicolas Chamot-Rooke, Nicola Corradi, et al.. Seismic Exploration of the Deep Structure and Seismogenic Faults in the Ligurian Sea by Joint Multi Channel and Ocean Bottom Seismic Acquisitions: Preliminary Results of the SEFASILS Cruise. Geosciences, 2020, 10 (3), pp.108. ⟨10.3390/geosciences10030108⟩. ⟨hal-02524420⟩
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