Segmentation of the Apenninic Margin of the Tyrrhenian Back?Arc Basin Forced by the Subduction of an Inherited Transform System

The Tyrrhenian back-arc basin developed at the rear of E-ward migrating Apennine fold-and-thrust belt, with northward decreasing rollback subducting Adria slab leading to fading extension. northern portion is made thinned continental crust, whereas in central/southern extension eventually evolved oceanic crust production. In this framework, a long-lasting debate concerns existence >200 km long transform zone along 41st parallel, which should separate two portions basin. At its eastern termination, branch presumed enters margin belt and occurs as an accommodation ribbon extensional faults related basins. This zone, separates areas mutually perpendicular directions, here introduced, described, named Ponza-Alife zone. Interpretation seismic lines new structural stratigraphic data from have been used constrain pre-orogenic syn-orogenic architecture plate Plio-Quaternary stage. Our indicate that studied retraces deep-seated fault system located inherited Early Jurassic rifting episode, caused lateral juxtaposition different rift domains plate. We propose during collision trench retreat, has controlled differential retreat across forcing development overlying basin's margin.