A tectonic mélange, composed of Late Cretaceous to late Oligocene blocks, crops out 20 km inland from the inferred front of an ancient subduction complex in the Northern Apennines (Italy).Apatite fission-tracks analysis has been performed on samples from representative mélange blocks. All the samples, after sedimentation, reached temperatures of about 80°-120° and were successively exhumed starting at 25 – 17 Ma. Stratigraphic and structural data suggest that the mélange was originated by underthrusting processes as a consequence of frontal tectonic erosion of the prism while apatite fission tracks analysis unravel that after a short time period they rapidly exhumed
Underthrusting followed by rapid exhumation in the frontal part of an erosive subduction complex: evidence from a fossil analogue of the Northern Apennines, Italy / Remitti, Francesca; Balestrieri, M. L.; Vannucchi, P.; Bettelli, Giuseppe; Fantoni, Laura. - STAMPA. - -:(2008), pp. 175-179. (Intervento presentato al convegno International Meeting of Young Researchers in Structural Geology and Tectonics tenutosi a Oviedo nel 1-3 Luglio 2008).