GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.2 GNGTS 2023 A New Three-Dimensional Moho Model of the Central Mediterranean Area S. Bongiovanni 1 , A. D’Alessandro 2 , R. Martorana 1 , A. Sulli 1 1 Università di Palermo, Dipartimento di Scienze della Terra e del Mare, Palermo, Italy 2 Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Nazionale Terremoti, Rome, Italy INTRODUCTION The Central Mediterranean is a very complex geodynamic area resulting from the interaction between the African and European plates. This interaction is responsible for tectonics and geodynamic processes that are strongly related to the variable topography of the Moho surface present in the study area. In this context, a Moho map is of great importance as it is a fundamental requirement to obtain detailed high resolution models of the structure of the upper mantle (Lippitsch et al., 2003) and to better understand the geodynamic of the area. In this work we propose a new three-dimensional Moho map for the central Mediterranean, obtained from the interpolation of results of different methods. STUDY AREA The Central Mediterranean consists of a complex system of extensional, compressive and strike/slip structures resulting from the interaction between the African and European Plates. This process has caused continental collision, lithospheric subduction and opening of back-arc basins with strong lateral variation in lithospheric composition and thickness (Catalano et al., 2001; Di Stefano et al., 2009). As a result, half of the 14 crustal types defined at global scale by Mooney et alii (1998) are present in the study area (Van der Maijde et al., 2003). MATERIALS AND METHODS In order to reconstruct the three-dimensional Moho model of the Central Mediterranean, different data were used. Initially, Moho maps existing in literature were considered (Di Stefano et al., 2011; Finetti, 2005; Cassinis et al., 2005; Maesano et al., 2017; DISS Working Group, 2021). These were supplemented