Composition, provenance and thermal history of sedimentary successions from the Cilento Group (southern Apennines)

The Cilento Group represents the first deep-marine forelandclastic wedge, deposited since the early Langhian, onto deformedoceanic-derived rocks and shallow-water carbonate rocks of theAdria margin. The Cilento Group, is an impressive turbiditicsystem, which records the earliest collisional phases of theCalabria and Adria microplates in southern Apennines andextends from the Tyrrhenian coast to the NE to the Ionian coastto the SE. The terrains of the Cilento Group unit unconformablyoverlie carbonate rocks of the apenninic platform to the east and,more extensively, the Liguride and Sicilide oceanic-derivedterranes.The Cilento Group, Langhian to Tortonian in age (AMORE etalii, 1988 and many others) 1200-2000 m thick, restsunconformably on the Liguride Complex, and in turn it isunconformably overlain by the upper Tortonian GorgoglioneFormation, and the upper Tortonian to lower Messinian (?)Monte Sacro, Oriolo and Serra Manganile Fms (CRITELLI, 1999;CRITELLI et alii, 2011). The Cilento Group consists of differentturbidite depositional systems. In addition to siliciclastic turbiditebeds, the Cilento Group includes numerous carbonato-clasticmegabeds (from a few meters to 65 m thick), olistostrome beds(ten to hundreds of meters thick), and coarse volcaniclastic debrisflows and turbidites. It has been divided into four formations: thePollica FmFm, the San Mauro Fm, the Torrente Bruca FmFmand the Albidona FmFm, from the northwest to the southeast(Fig. 1).