GNGTS 2018 - 37° Convegno Nazionale

GNGTS 2018 S essione 1.1 87 is highly segmented and composed by numerous faults with a direction ranging from NE-SW to NNE-SSW in the northern sector. Some of these faults coincide with the Pedagaggi Agnone Fault System, known in literature, which accommodated the flexure of the foreland below the orogenic thrust belt up to lower Pleistocene. PVFS shapes a segmented pattern with faults of second hierarchical order (about 10 km long) separated by minor geological complexity, like gaps and step-overs, that act as barriers capable to arrest the propagation of the brittle deformation at the surface. According to the segmentation model proposed by Boncio et al. (2014) these faults can joint at depth in a unique master fault whose dimension is about 34 km (considering the fault belt length). In the northern and southern sectors, we observed some morphological scarps associated to N-S directed, west dipping faults (Fig. 2). Geomorphic indexes highlight recent activity of the PVFS and AFFS. In particular, a likely inversion of kinematics is observed for the PVFS. Indeed, the hypsometric curve of the Mulinello, Marcellino and Anapo rivers show sectors in rejuvenation in the hangingwall of the faults belonging to PVFS; similarly, SL anomalies of all the four rivers lies at the hangingwall of these faults instead of the footwall. Finally, knickpoints on the long profile of the four rivers, in proximity of the faults of PVFS, show a different anomalous shape with respect to those of normal faults. These results indicate a likely reactivation of the normal faults of PVFS as reverse ones, as already suggested by other Authors (e.g. Catalano et al. , 2010) that observed Fig. 2 - DEM and mapped faults. PVFS is the Palazzolo Villasmundo Fault System (in red): Sf1, Sf2 and Sf3 are the Sortino Faults, ESF is the East Sortino Fault; Mf1 anf Mf2 are the Melilli Faults and Vf1, Vf2 and Vf3 are the Villasmundo Faults, WCF is the West Canicattini Fault. AFFS is the Augusta Fault System (in yellow); CF is the Canicattini Fault, FF is the Floridia Fault, AF is the Augusta Fault and MTF is the Monte Tauro Fault.