TANSI C. (1); MUTO F. (2); CRITELLI S. (2); IOVINE G. (1), 2007, Neogene-Quaternary strike-slip tectonics in the central Calabrian Arc (Southern Italy)., Journal of geodynamics 43 (2007): 393–414. doi_10.1016/j.jog.2006.10.006,
URL: http://www.cnr.it/prodotto/i/41578

A Middle Miocene-Middle Pleistocene regional NW-SE left-lateral strike-slip fault system profoundly conditioned the evolution of central Calabria, during the late tectonic phases which involved the Apulian block and the Calabrian Arc. This system dissected an Oligocene-Early Miocene orogenic belt, made of Alpine nappes overthrusted the Apennine Chain. In the present study, three major faults, arranged in a right-hand en ´echelon pattern, have been identified within the mentioned strike-slip system_ the Falconara-Carpanzano Fault, the Amantea-Gimigliano Fault, and the Lamezia-Catanzaro Fault. A wide active transtensional area (N-S-trending Crati Graben), developed since Late Pliocene, is located at the SE termination of the Falconara-Carpanzano Fault. In the sectors of overlapping of the faults, the transpressional regime induced tectonic extrusions of the deep-seated units of the Chain, producing push-ups within the overlying complexes. In particular, push-ups are either made of Mesozoic carbonate rocks at Mt. Cocuzzo-Mt. Guono and Mt. S. Lucerna, or of ophiolite rocks at Mt. Reventino and Gimigliano. In these sectors, the primary geometric relationships among the units of the orogenic belt were locally altered. The en ´echelon arrangement of the above-mentionedNW-SE major strike-slip faults indicates the existence of a left-lateral crustal shear zone, striking on average N160. The age of the regionalNW-SE left-lateral strike-slip system deserves thorough investigation. Besides evidence from historical and instrumental earthquakes, and from paleoseismological investigations, the kinematic data suggests that the "cause" of the transtensional sector (Crati Graben) could be found in the regional Falconara-Carpanzano Fault.

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