GNGTS 2018 - 37° Convegno Nazionale

GNGTS 2018 S essione 1.2 201 chain), where the ATLF joins with the Sisifo-Alicudi shear zone, a WNW-ESE oriented dextral strike-slip shear zone passing through Alicudi and Filicudi characterized by the occurrence of low-to-moderate magnitude earthquakes (Palano et al. , 2012 and references therein). In its south-eastern termination ( i.e. toward Mt. Etna and the Ionian coast) no clear tectonic expression can be recognized (Billi et al. , 2006; De Guidi et al. , 2013; Palano et al. , 2015). Despite the complexity of the onshore tectonic pattern, the activity of major fault systems agrees well with offshore data. The IF and AEF may thus represent the Ionian counterparts of the dextral transtensive deformations described in NE Sicily and in the southern Tyrrhenian Sea. This study focuses on the off-shore segment of ATLFS in the southern Tyrrhenian and surrounding areas. We adopted a multidisciplinary approach based on seismic reflection and submarine morpho-structural data integrated with seismic, geodetic and geological observations collected in the last two decades. In particular, we investigated a broad deformation zone that include the ATLFS to provide an improved picture of active tectonics offshore northern Sicily. References Billi A., Barberi G., Faccenna C., Neri G., Pepe F. and Sulli A.; 2006: Tectonics and seismicity of the Tindari Fault System, southern Italy: Crustal deformations at the transition between ongoing contractional and extensional domains located above the edge of a subducting slab . Tectonics, 25 (2). De Guidi G., Lanzafame G., Palano M., Puglisi G., Scaltrito A. and Scarfì L.; 2013: Multidisciplinary study of the Tindari Fault (Sicily, Italy) separating ongoing contractional and extensional compartments along the active Africa-Eurasia convergent boundary . Tectonophysics, 588 , 1-17. Faccenna C., Becker T. W., Lucente F. P., Jolivet L. and Rossetti F.; 2001: History of subduction and back arc extension in the Central Mediterranean . Geophys. J. Int., 145 (3), 809-820. Palano M., Ferranti L., Monaco C., Mattia M., Aloisi M., Bruno V., Cannav F. and Siligato, G.; 2012: GPS velocity and strain fields in Sicily and southern Calabria, Italy: updated geodetic constraints on tectonic block interaction in the central Mediterranean . J. Geophys. Res.: Solid Earth, 117 (B7). Palano M., Piromallo C., and Chiarabba C.; 2017: Surface imprint of toroidal flow at retreating slab edges: The first geodetic evidence in the Calabrian subduction system . Geophys. Res. Lett., 44 (2), 845-853. Palano M., Schiavone D., Loddo M., Neri M., Presti D., Quarto R., Totaro C. and Neri, G.; 2015: Active upper crust deformation pattern along the southern edge of the Tyrrhenian subduction zone (NE Sicily): Insights from a multidisciplinary approach . Tectonophysics, 657, 205-218. Polonia A., Torelli L., Artoni A., Carlini M., Faccenna C., Ferranti L., Gasperini L., Govers R., Klaeschen D., Monaco C., Nijholt N., Orecchio B. and Wortel R.; 2016: The Ionian and Alfeo–Etna fault zones: New segments of an evolving plate boundary in the central Mediterranean Sea? . Tectonophysics, 675 , 69-90. Polonia A., Torelli L., Gasperini L., Cocchi L., Muccini F., Bonatti E., Hensen C., Schmidt M., Romano S., Artoni A. and Carlini, M. (2017). Lower plate serpentinite diapirism in the Calabrian Arc subduction complex . Nature communications, 8 (1), 2172. QUATERNARY TECTONIC ACTIVITY IN THE NORTH-EASTERN CORNER OF THE FRIULI PLAIN (NE ITALY) G. Patricelli, M.E. Poli Department of Agricultural, Food, Environmental and Animal Sciences – University of Udine, Italy Interpretation of seismic industrial lines matching with morphotectonic data and wells subsurface data allowed us to retrace the bottom of the Quaternary succession buried under the eastern Friuli plain, with the aim to detect the Quaternary activity of the main faults. The study area is settled between eastern Friuli and western Slovenia, where the external fronts of late Cretaceous-Paleogene SW-verging External Dinarides meet the external fronts of S-verging Neogene Eastern Southalpine Chain. The complex structural setting of the area