GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.1 - POSTER GNGTS 2023 Tectonic-Sedimentary evolution of the Tuscan shelf (Italy): seismic-stratigraphic analysis of Neogenic succession in the northern Tyrrhenian Sea between Elba Island and Monte Argentario promontory M. Buttinelli 1 , F. Mazzarini 1 , G. Musumeci 1,2 , R. Maffucci 1 , I. Cavirani 2 , P. Diviacco 3 1 Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Roma, Italy 2 Università di Pisa, Dipartimento di Scienze della Terra, Via Santa Maria, 53, 56126, Pisa, Italy 3 Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS Borgo Grotta Gigante 42/C - 34010 - Sgonico (TS), Italy Abstract The northern Tyrrhenian Sea separates the northern Apennines of the Tuscany coast (Italy) from the Corsica island (France). The northern Tyrrhenian Sea bathymetry in the western part close to the Corsica Basin shows bowl-shape geometries, while its eastern part close to the Tuscan Shelf shows more regular and flat geometry. The architecture of the Tuscan Shelf has been extensively investigated and is characterized by structural highs (ridges) and depressions (basins) (Bartole, 1995; Mauffret & Contrucci, 1999; Pascucci et al., 1999; Sartori et al., 2001; Cornamusini et al., 2002; Pascucci, 2005; Contrucci et al., 2005), and it is separated from the Corsica Basin by an important structural-morphological high, the N-S trending Elba-Pianosa Ridge (Wezel, 1982). The western sector of the northern Apennines and the northern Tyrrhenian Sea (Tuscany and northern Latium) still preserve the record of the initial phases of the continental collision between Europe and the Adria microplate and the late- and post-orogenic evolution linked to the early phases of extension (Carmignani et al., 1994; Bonini et al., 2014; Buttinelli et al. 2014; Ryan et al., 2021). To date, the role of the structural inheritance (i.e., the thrust stack formed in the early phase of the orogeny) has not been fully explored. The careful analysis of the Tuscan Shelf basins’ architecture may provide constraints in forwarding models of the tectonic evolution of this sector of the orogeny (e.g., Pascucci, 2002; Contrucci et al., 2005; Buttinelli et al., 2014).