GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 3.3 ______ ___ GNGTS 2023 Fig. 1 - a) location map of the two study areas; b) 3D image of the Sardo-Provençal Basin with the sea bottom map (EMODnet: https://www.emodnet-bathymetry.eu/) and the interpreted points from the 2D seismic lines; c) 3D image of the Balearic Basin with the sea bottom map (EMODnet) and the interpreted points from the 2D seismic lines. Contour lines every 50 ms. Method improvement and Results. To improve the distribution of salt diapirs and make it more uniform and truthful, we attempted to increase the resolution of the study area with point data extrapolated from the interpretation of seismic lines and manipulated to fit the existing data.  We created n random points (within the X and Y boundaries of the detailed map) with z-values ​ between the minimum and maximum values of the already interpreted structures. Since the random points were uniformly distributed, when they were added to the original points, they did not change the original distribution (Fig. 2c): thus, we can assume that the new distribution is also realistic. The choice of the number of random points (i.e. n=1000) is related to the size of the study area and to the computational effort required.  With the new points created in this way, it was possible to produce the map of the distribution of diapirs, still considering the surface of the seabed as a trend area. Analyzing the data and the available seismic lines, another trend can be observed in the WS area: the salt domes develop gradually towards the Gulf of Lion and thus show a greater variation in depth, while the diapirs towards the Sardinian margin are less developed and show a lesser variation between the maximum and minimum values in time-depth (Fig. 2a). Analyzing the data