GNGTS 2019 - Atti del 38° Convegno Nazionale

162 GNGTS 2019 S essione 1.2 Fig.1 - Map of the study area with position of the interpreted seismic dataset and of the analyzed boreholes (black circles). The two red lines depict the position of the profiles represented in Fig. 2 and 3. of points with z values, derived from a regression against observation of surrounding points) allowed us to create surfaces from line and point data. Interpretation of seismic profiles was conducted with the Kingdom software. The top and the base of the MSC sequence, or the corresponding erosional truncation (Margin Erosional Surface, MES, by Lofi et al. , 2018) have been interpreted. Maps of these horizons have been produced with Flex Grid technology. In spite of the lack of sonic log, useful to convert the depth by TWT to meter, or vice versa, the great amount of calibration and the clear evidence of some main seismic reflectors (in particular the MES or Top of the MSC layer) allowed us to calculate a velocity model to convert in depth the obtained TWT structural map. Google Earth, Excel and Corel Draw were also supporting data collection, storage and graphic representation, all of them contributing to the final results. Results. We analyzed more than 80 boreholes, 53 of them crossing the MSC evaporitic layer, 33 of them crossing the erosional truncation (MES). The MSC thickness is changeable (Fig. 2), reaching the maximum value of 233 m in the Contessa-1 well (Fig. 1). Considering that generally boreholes are drilled in positive structures, we cannot exclude that greater thickness could be present in negative structures present during the Messinian age. The lateral changes of the MSC thickness has been focused along the seismic profile, analyzing the cause of its variability (sedimentary rate and/or erosion) and the possible effect