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university of Provence - Aix-Marseille I |  |
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university of Provence - Aix-Marseille I | |
| HAL: insu-00616947, version 1 |
| DOI: 10.1111/j.1365-2117.2011.00521.x |
| Detailed view |  Export this paper |
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| Basin Research 24 (2012) 125-153 |
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| A two-step process for the reflooding of the Mediterranean after the Messinian Salinity Crisis |
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| François Bache 1, 2Speranta-Maria Popescu 3 |
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| (2012) |
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| The Messinian Salinity Crisis is well known to have resulted from a significant drop of the Mediterranean sea level. Considering both onshore and offshore observations, the subsequent reflooding is generally thought to have been very sudden. We present here offshore seismic evidence from the Gulf of Lions and re-visited onshore data from Italy and Turkey that lead to a new concept of a two-step reflooding of the Mediterranean Basin after the Messinian Salinity Crisis. The refilling was first moderate and relatively slow accompanied by transgressive ravinement, and later on very rapid, preserving the subaerial Messinian Erosional Surface. The amplitude of these two successive rises of sea level has been estimated at ≤500 m for the first rise and 600-900 m for the second rise. Evaporites from the central Mediterranean basins appear to have been deposited principally at the beginning of the first step of reflooding. After the second step, which preceeded the Zanclean Global Stratotype Section and Point, successive connections with the Paratethyan Dacic Basin, then the Adriatic foredeep, and finally the Euxinian Basin occurred, as a consequence of the continued global rise in sea level. A complex morphology with sills and sub-basins led to diachronous events such as the so-called 'Lago Mare'.This study helps to distinguish events that were synchronous over the entire Mediterranean realm, such as the two-step reflooding, from those that were more local and diachronous. In addition, the shoreline that marks the transition between these two steps of reflooding in the Provence Basin provides a remarkable palaeogeographical marker for subsidence studies. |
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| 1: | Institut des Sciences de la Terre de Paris (iSTeP) |
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CNRS : UMR7193 – Université Pierre et Marie Curie [UPMC] - Paris VI |
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| 2: | GNS Science |
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GNS |
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| 3: | Institut de Physique du Globe de Paris (IPGP) |
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CNRS : UMR7154 – INSU – IPG PARIS – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot – Université de la Réunion |
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| 4: | Domaines Océaniques |
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Institut Universitaire Européen de la Mer (IUEM) – Université de Bretagne Occidentale [UBO] – Observatoire des Sciences de l'Univers – CNRS : UMR6538 |
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| 5: | Centre européen de recherche et d'enseignement de géosciences de l'environnement (CEREGE) |
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CNRS : UMR6635 – Institut de recherche pour le développement [IRD] – INSU – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III |
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| 6: | Géosciences Marines |
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Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
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| 7: | Interactions et dynamique des environnements de surface (IDES) |
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CNRS : UMR8148 – INSU – Université Paris XI - Paris Sud |
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| 8: | National Institite of Marine Geology & Geoecology |
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GEOECOMAR |
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| 9: | Instituto de Ciencias del Mar de Barcelona |
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CSIC |
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| 10: | Environnements et Paléoenvironnements OCéaniques (EPOC) |
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CNRS : UMR5805 – INSU – Université Sciences et Technologies - Bordeaux I – Ecole Pratique des Hautes Etudes – Observatoire Aquitain des Sciences de l'Univers |
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| 11: | Institut des Sciences de la Terre d'Orléans (ISTO) |
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Université d'Orléans – CNRS : UMR6113 – Université François Rabelais - Tours – INSU |
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| 12: | IDES (Université Paris-Sud XI) |
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CNRS : UMR8148 |
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| 13: | Departamento de Oceanografia Geologica |
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UERJ-Brasil |
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| 14: | Laboratoire de géologie de l'ENS (LGE) |
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CNRS : UMR8538 – INSU – Ecole normale supérieure de Paris - ENS Paris |
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| 15: | Sts Cyril and Methodius University |
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Faculty of mining and geology |
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| 16: | Geological Institute |
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Bulgarian Academy of Sciences |
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| 17: | Geolomagnetic Institute |
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Geolomagnetic Institute |
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| 18: | ITU (GEOLOGY AND MINING DEPARTMENT) |
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Istanbul Technical University |
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| 19: | Géosciences Rennes (GR) |
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CNRS : UMR6118 – INSU – Centre Armoricain de Recherches en Environnement – Université de Rennes 1 |
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| 20: | ISES |
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Vrije Universiteit Amsterdam |
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| 21: | Department of Geology |
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Collin Collège |
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| 22: | Istanbul Technical University |
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School of Mines and eurasia Institute of Earth Sciences |
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| subject | : | Sciences of the Universe/Earth Sciences/Tectonics Environmental Sciences/Global Changes |
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| Attached file list to this document: | |||||
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| insu-00616947, version 1 | |
| http://hal-insu.archives-ouvertes.fr/insu-00616947 | |
| oai:hal-insu.archives-ouvertes.fr:insu-00616947 | |
| From: Nathalie Pothier | |
| Submitted on: Monday, 2 July 2012 15:07:02 | |
| Updated on: Tuesday, 3 July 2012 14:36:46 | |
