Strike-slip systems as the main tectonic features in the Plio-Quaternary kinematics of the Calabrian Arc |
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Authors: | Anna Del Ben Carla Barnaba Alessia Taboga |
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Institution: | (1) Department of Geological, Environmental and Marine Sciences, EGG, University of Trieste, via Weiss, 1, Trieste, 34127, Italy;(2) Present address: OGS—Centro di Ricerche Sismologiche, Via Treviso 55, Udine, 33100, Italy;(3) Present address: School of Earth, Ocean and Planetary Sciences, Cardiff University, Main College, Park Place, CF10 3YE Cardiff, UK |
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Abstract: | The oblique and diachronous collision of the Apennine-Maghrebian Chain with the Apulian (in the north-east) and Pelagian (in
the south) continental forelands, has determined the characteristic arcuate structure of this orogen. The effects of Plio-Pleistocene
deformation of the Calabrian Arc have been analysed on the basis of available reflection seismic profiles and using local
time-structural maps reconstructed along the main structures. During this period, internal sectors of the Tertiary chain migrated
forward on the oceanic Ionian foreland, and were cut by important strike-slip systems. These last have an orientation approximately
coincident with that of the migration of the front, allowing differential movement of the different sectors of the arc, towards
the weakly buoyant Ionian oceanic domain. The dataset suggests a clear connection between the development of the strike-slip
systems cutting the chain and the direction of tectonic transport, towards the East during Late Messinian/Early Pliocene time,
to the ESE during Late Pliocene/Early Pleistocene time, finally to the SSE during the Middle/Late Pleistocene to Present,
showing a clockwise rotation in well defined stages during the kinematic evolution of the chain. The origin of the Strait
of Messina during the different phases is also interpreted in the context of the analysed regional tectonic setting. |
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Keywords: | Calabrian Arc Foreland domain Seismic reflection profiles Strike-slip tectonics Time-structural map |
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