Main description (Italian)

The Tyrrhenian basin is one of the few existing back-arc basins on Earth and the only one demonstrated to have experienced the process of mantle exhumation. Despite the various studies conducted in the Tyrrhenian basin in the last 50 years, the evolution from the first break-up to the opening of the central Vavilov basin, the internal structure, the relationship between thinned continental crust / exhumed mantle / intruded magma, and the thermal state with the related deep fluid circulation are not fully understood. The IODP-402 in 2024 has helped to advance on several of these questions strongly, but drilling data is limited in the spatial interpretation of this complex back-arc setting. With the present survey, we tried to fill part of these gaps by collecting new data represented by: heat flow, thermal conductivity, sub-bottom chirp profiles and -very high-resolution swath bathymetry. These data will help to image shallow tecto-sedimentary and magmatic features and help to constrain the deep thermal structure of the central part of the Tyrrhenian Basin.