ORIGIN AND EVOLUTION OF THE MESSINIAN BASINS DEVELOPED ON TOP OF THE SICILIAN FOLDAND THRUST BELT

Risultato della ricerca: Otherpeer review

Abstract

During the Messinian the inherited paleo-topography conditioned the depositionalenvironments of the Mediterranean region, already strongly influenced by the effects of thesalinity crisis, mainly in the central region, where seabed at that time is expected to be veryuneven and shallower than Western and Eastern Mediterranean. Indeed in this area as from 15Ma the Sicilian Fold and Thrust Belt (SFTB) was originating, characterized by a multi-stageevolution: two main shortening events generated and developed at different structural levels(shallow- and deep-seated thrusts in thin-skinned thrust-model) and at different time intervals,involving mainly the Meso-Cenozoic carbonate units of the ancient African passive continentalmargin, followed by a more recent thick-skinned thrusting that involved the Plio-Pleistiocenedeposits in the frontal area, as well as the crystalline basement in the internal sector of the chain.Just in the Messinian time interval along the internal sectors of this edifice the transition fromshallow to deep seated tectonics was recorded. On top of the SFTB different types of basinsoriginated progressively in response to the shortening wave. Depending on their position andrelated active processes during the Messinian we can distinguish: intramountain (mainly posttectonic),thrust-top (syn-tectonic), and foreland (pre-tectonic) Messinian basins, with differentcharacters and geometries. Our results are only preliminary and could represent a first approachtowards a better understand of the present complex distribution of the different variety of theMessinian sequences. The next step of this study should be the palinspastic restoration of thestrongly deformed Messinian successions, in order to reconstruct a more detailed Mediterraneanpaleogeography
Lingua originaleEnglish
Pagine29-30
Numero di pagine2
Stato di pubblicazionePublished - 2016

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