GNGTS 2019 - Atti del 38° Convegno Nazionale

142 GNGTS 2019 S essione 1.2 produced a new shifting of volcanism firstly to the present-day Valle del Bove area and then to the Mt. Etna summit craters. In conclusion, a wide wrench region, characterized by different shear zones, affects the whole Etna area. Their activity and mutual interaction led to local transtension and subsidence (which favoured volcanism), rapidly evolving to transpression and uplift (which hampered volcanism), resulting in the overall time-space scattering of the volcanic centres. The model also sheds new light on the nature of the tectonic deformation heavily affecting the southeastern coastal sector of the volcano, with both seismicity and flank movement. References Bianchi F., Carbone S., Grasso M., Invernizzi G., Lentini F., Longaretti G., Merlini S. and Mostardini F.; 1987: Sicilia orientale: profilo geologico Nebrodi-Iblei . Mem. Soc. Geol. It., 38 , 429–458. Borgia A., Ferrari L. and Pasquarè, G.; 1992: Importance of gravitational spreading in the tectonic and volcanic evolution of Mount Etna . Nature, 357 , 231–235. Branca S., De Guidi G., Lanzafame G. and Monaco C.; 2014: Holocene vertical deformation along the coastal sector of Mt. Etnav olcano (eastern Sicily, Italy): implications on the time-space constrains of the volcano lateral sliding . J. Geodyn., 82 , 194–203. Branca S., Coltelli M., Groppelli G. and Lentini, F.; 2011: Geological map of Etna volcano, 1:50,000 scale . Ital. J. Geosci., 130, 265–291. Catalano S., Pavano F., Romagnoli G. and Tortorici G.; 2017: Late Quaternary tectonics and active ground deformation in the Catania urban area (eastern Sicily): New constraints from a geological investigation . Tectonophysics, 712–713, 200–207, https://doi.org/10.1016/j.tecto.2017.05.033. Chiocci L.F., Coltelli M., Bosman A. and Cavallaro D.; 2011: Continental margin largescale instability controlling the flank sliding of Etna volcano . Earth Planet. Sci. Lett., 305 , 57–64. Coltelli M. et al. ; 2016: The marine activities performed within the TOMO-ETNA experiment . Ann. Geophys., 59 , 4, https://doi.org/10.4401/ag-7081. Firetto Carlino M., Cavallaro D., Coltelli C., Cocchi L., Zgur F., Patanè D.; 2019: Time and space scattered volcanism of Mt. Etna driven by strike-slip tectonics . Sci. Rep., 9:12125 https://doi.org/10.1038/s41598-019-48550-1. Mattia M., Bruno V., Cannavò F. and Palano M.; 2012: Evidences of a contractional pattern along the northern rim of the Hyblean Plateau (Sicily, Italy) from GPS data . Geologica Acta, 10 , 1–9. Mazzarini F., Isola I., Bisson M., Nannipieri L., Favalli M., Fornaciai A. and Tarquini S.; 2017: Seismic lines offshore Mount Etna (SOME) open database . Ann. Geophys., 60 , 5, S0557, https://doi.org/10.4401/ag-7346. Polonia, A. Torelli L., Mussoni P., Gasperini L., Artoni A. and Klaeschen D.; 2011: The Calabrian Arc subduction complex in the Ionian Sea: regional architecture, active deformation, and seismic hazard . Tectonics, 30 , TC5018. Tibaldi A., Pasquar, F.A. and Tormey D.; 2010: Volcanism in reverse and strike–slip fault settings. In New Frontiers in Integrated Solid Earth Sciences (eds Cloetingh, S. and Negendank, J.) 315–348 (Springer-Verlag, Dordrecht, The Netherlands), https://doi.org/10.1007/978-90-481-2737-5. Urlaub M. et al. 2018: Gravitational collapse of Mount Etna’s south-eastern flank . Sci. Adv., 4(10) . Wakabayashi J., Hengesh J.V. and Sawyer T.L.; 2004: Four-dimensional transform fault processes: progressive evolution of step-overs and bends . Tectonophysics, 392 , 279–301. THE NORTH-ANATOLIAN FAULT BELOW THE SEA OF MARMARA AND THE NE AEGEAN SEA (NW TURKEY) L. Gasperini 1 , A. Polonia 1 , M.N. Çag˘ atay 2 1 Istituto di Scienze Marine, ISMAR-CNR, Marine Geology, Bologna, Italy 2 Istanbul Technical University, EMCOL and Department Geological Engineering, Istanbul, Turkey Introduction. The disastrous 1999 earthquakes in eastern Marmara region have stimulated the international community to understand geometry and behaviour of the North-Anatolian Fault (NAF) beneath the Sea of Marmara. Whereas the area was considered mature for a large earthquake, the knowledge of detailed fault geometry below the Sea of Marmara was very