Candoni, Oliviero, Ceramicola, Silvia, Praeg, Daniel, Zecchin, Massimo, Brancatelli, Giuseppe, Gorini, Christian, Bohrmann, Gerhard, Cova, Andrea, Istituto Nazionale di Geofisica e di Oceanografia Sperimentale (OGS), Università degli studi di Trieste = University of Trieste, Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Pontifical Catholic University of Rio Grande do Sul (PUC-RS), Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Center for Marine Environmental Sciences [Bremen] (MARUM), Universität Bremen, The European Union’s Horizon 2020 research and innovation programme under Marie Skłodowska-Curie grant agreement No. 656821, EC SEAGAS (656821), European Project: 656821,H2020,H2020-MSCA-IF-2014,SEAGAS(2016), Praeg, Daniel, Multi-disciplinary Comparison of Fluid Venting from Gas Hydrate Systems on the Mediterranean and Brazilian Continental Margins over Glacial-Interglacial Timescales - SEAGAS - - H20202016-04-30 - 2019-04-29 - 656821 - VALID, EGU General Assembly Conference, Candoni, O., Ceramicola, S., Praeg, D., Zecchin, M., Brancatelli, G., Gorini, C., Bohrmann, G., Cova, A., Università degli studi di Trieste, Pontifícia Universidade Católica do Rio Grande do Sul [Porto Alegre] (PUCRS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), and Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)
International audience; The Ionian Calabrian margin, offshore southern Italy, is a tectonically active area, located above a subduction zone dominated by rollback of the African plate. A variety of mass wasting features are known to occur along the inner continental slope, based on seafloor mapping during the Italian project MaGIC (Marine Geohazards Along the Italian Coasts). New high-resolution geophysical data are available from a wider area following two surveys, in 2014 of the German RV Meteor, which acquired multibeam bathymetry (50 m DTM) and Parasound sub-bottom profiles, and in 2015 of the Italian RV OGS Explora, which acquired Chirp sub-bottom and multichannel seismic reflection profiles. Here we integrate these data with existing geophysical datasets and published exploration wells to map submarine slope failures and mass wasting deposits within the Pliocene-Quaternary succession. The results show that features of mass failures are widespread along the steep (higher than 10˚) slopes of the Ionian margin south of Calabria, and within the intra-slope basins of the margin east of Calabria. Seafloor features range from small-scale features (hundreds of meters in extent), mainly located on the canyon headwalls and sidewalls, to larger slides (up to 10 km in extent) on open slopes. Subsurface profiles across open slopes and intra-slope basins provide evidence of repeated failures, particularly in the upper Quaternary. The stratigraphic distribution of failures suggests that widespread mass wasting features occur above an unconformity tentatively dated to the Middle Pleistocene (