HAL : insu-00616338, version 1

DOI : 10.1016/j.palaeo.2011.07.018

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Palaeogeography Palaeoclimatology Palaeoecology / Palaeogeography Palaeoclimatology and Palaeoecology 310, 3-4 (2011) 256-272

The Messinian Salinity Crisis in the Dacic Basin (SW Romania) and early Zanclean Mediterranean-Eastern Paratethys high sea-level connection

Jean-Pierre Suc 1, Damien Do Couto 1, 2, M.C. Melinte-Dobrinescu 3, Rodica Macalet 4, Frédéric Quillévéré 5, Georges Clauzon 6, Istvan Csato 7, Jean-Loup Rubino 8, Speranta-Maria Popescu 9

(2011)

New field observations and fossil analyses complete and clarify the strong impact of the Mediterranean sea-level changes linked to the peak of the Messinian Salinity Crisis on the Dacic Basin in southwestern Romania. In addition to the Gilbert-type fan delta already evidenced along the Danube River in the area of Turnu Severin, a new Gilbert-type fan delta is described northward. Early Zanclean bottomset beds are evidenced and dated based on nannofossils at the junction of the two coalescing Gilbert-type fan deltas. A clear sedimentological, morphological and chronologic differentiation is established in the area between the Carpathians Late Miocene piedmont alluvial fans and the early Zanclean Gilbert-type fan deltas. The early Zanclean age of the Hinova clays, where the bottomset beds of the Gilbert-type fan deltas are mostly developed, is confirmed by the occurrence of nannofossil markers of Subzone NN12b and a Bosphorian mollusk macrofauna. Early Zanclean inflow of Mediterranean marine waters into the Dacic Basin is also supported by the record of planktonic foraminifers. In the Dacic Basin, the Messinian Salinity Crisis resulted in the cutting of the Iron Gates by a Carpathians river. Fluvial erosion also affected the residual Pannonian Basin and probably catched the paleo-Tisza River which contributed to the erosion of the Iron Gates and to the fluvial drainage of the partly desiccated Dacic Basin. Arguments are reinforced in favor of a marine gateway between the Mediterranean and Dacic Basin through the Balkans before and after the Messinian Salinity Crisis.

1 :	Institut des Sciences de la Terre de Paris (iSTeP)
	CNRS : UMR7193 – Université Pierre et Marie Curie [UPMC] - Paris VI
2 :	Institut des Sciences de la Terre d'Orléans (ISTO)
	Université d'Orléans – CNRS : UMR6113 – Université François Rabelais - Tours – INSU
3 :	National Institite of Marine Geology & Geoecology
	GEOECOMAR
4 :	National Institute of Hydrology and Water Management
	National Institute of Hydrology and Water Management
5 :	Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE)
	CNRS : UMR5276 – INSU – Université Claude Bernard - Lyon I – École Normale Supérieure - Lyon
6 :	Centre européen de recherche et d'enseignement de géosciences de l'environnement (CEREGE)
	CNRS : UMR6635 – Institut de recherche pour le développement [IRD] – INSU – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III
7 :	Department of Geology
	Collin Collège
8 :	Total, CST JF–TG/ISS
	Total, CST JF–TG/ISS - Pau
9 :	Institut de Physique du Globe de Paris (IPGP)
	CNRS : UMR7154 – INSU – IPG PARIS – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot – Université de la Réunion

domaine

:

Planète et Univers/Sciences de la Terre/Tectonique Sciences de l'environnement/Milieux et Changements globaux

mots-clés : Fluvial network – Mediterranean sea-level changes – Gilbert-type fan delta – Eastern Paratethys – Pontian paleogeography

insu-00616338, version 1

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Contributeur : Nathalie Pothier <>

Soumis le : Jeudi 1 Septembre 2011, 14:32:50

Dernière modification le : Jeudi 6 Octobre 2011, 10:47:18