Palinspastic restoration and paleogeographic reconstruction of the peri-Tyrrhenian area during the Neogene

摘要: Abstract This paper presents the results of research carried out on paleogeographic and geodynamic post-collisional evolution peri-Tyrrhenian area from Southern Alps to Sicily. During this a back arc area-thrust belt-foredeep system developed, in which following tectono-sedimentary zones can be distinguished, external internal ones: foreland zone, connected foredeep through slope generally controlled by normal faults; foredeep, an assymmetric depression with strong subsidence, related compressional activity thrust zone; chain, whose outward migration late Oligocene onward was discontinuus, important stages crisis partially mechanical response different crustal thicknesses existing foreland; discontinuous satellite basins, developed within belt; inner part where superposition extensional tectonics over previous domains causes fragmentation belt, leading its destruction. According model, seven palinspatic maps are discussed, regarding time intervals: (25-24 m.y.), Burdigalian (22-20 Langhian (17-16 Serravallin (15-13 Tortonian (10-9 Messinian (5.5-5.3 m.y.) early Pliocene (5.3-4.6 m.y.). five these intervals significant modifications occurred whole area, changes. In any case seems clearly bundles tectonic lines transversal chain which, same interval, outermost belt separated areas values shortening, tthe most segments having amount extension. These certainly have significance probably acted along formed discontinuities.