Late Pleistocene N-S shear zones along the Latium Tyrrhenian margin: structural characters and volcanological implications

By the means of structural analyses, five important N-S striking shear zones, active during the Late Pleistocene, have been discerned on the Latium Tyrrhenian margin. From the kinematic point of view, these shear zones are characterised by a transition from strike-slip to extensional tectonics through transtensional, moving from the border of the Apennine chain to the coast. The main right-lateral strike slip shear zone is discontinuously elongated with a N-S trend from the western Sabina chain to the Colli Albani volcanic district. The correspondence of this outcropping strike-slip shear zone to crustal discontinuities is suggested by magmatological, geochemical and geophysical data. The possible connection between this main discontinuity and the offshore lineaments should be one of the topics investigated by the CROP11 profile.