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<title lang=en>Magnetostratigraphy and paleoenvironments in shallow-water carbonates : the Oligocene-Miocene sediments in the northern margin of the Liguro-Provençal basin (West Marseille, southeastern France)</title>
<creator>Demory, François</creator>
<creator>Conesa, Gilles</creator>
<creator>Oudet, J.</creator>
<creator>Mansouri, Habib</creator>
<creator>Munch, Philippe</creator>
<creator>Borgomano, J.</creator>
<creator>Thouveny, Nicolas</creator>
<creator>Lamarche, Juliette</creator>
<creator>Gisquet, Franck</creator>
<creator>Marié, Lionel</creator>
<contributor>Centre européen de recherche et d'enseignement de géosciences de l'environnement (CEREGE) ; Institut de Recherche pour le Développement (IRD) - Aix Marseille Université (AMU) - Collège de France (CdF) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Geologie des Systèmes et des Reservoirs Carbonates (GSRC - EA 4234) ; Université de Provence - Aix-Marseille 1</contributor>
<contributor>Dynamique de la Lithosphere ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire de Géologie des Systèmes et Réservoirs Carbonatés EA 4229 ; Université de Provence - Aix-Marseille 1</contributor>
<description>International audience</description>
<source>EISSN: 1777-5817</source>
<source>Bulletin de la Société Géologique de France</source>
<publisher>Société géologique de France</publisher>
<identifier>hal-00619040</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00619040</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00619040</source>
<source>Bulletin de la Société Géologique de France, Société géologique de France, 2011, 182 (1), pp.37-55. 〈10.2113/gssgfbull.182.1.37〉</source>
<identifier>DOI : 10.2113/gssgfbull.182.1.37</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.2113/gssgfbull.182.1.37</relation>
<language>en</language>
<subject lang=fr>Paleomagnetism</subject>
<subject lang=fr>Magnetostratigraphy</subject>
<subject lang=fr>Neogene</subject>
<subject lang=fr>Liguro-provençal basin</subject>
<subject lang=fr>Paleoenvironment</subject>
<subject lang=fr>Carbonates</subject>
<subject lang=fr>Paleobathymetry</subject>
<subject lang=fr>Paleoclimatic changes</subject>
<subject lang=fr>Geodynamics</subject>
<subject>[SDU.STU.ST] Sciences of the Universe [physics]/Earth Sciences/Stratigraphy</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The present study proposes to estimate the influence of climate, eustatism and local tectonics on the sedimentation of a basin margin at the syn-rift to post-rift transition. For that, paleomagnetic measurements were performed on a marine marly-calcareous sedimentary succession ranging from Upper Oligocene to Lower Miocene and located on the northern margin of the Liguro-Provençal basin. The magnetostratigraphic record is correlated to the reference geomagnetic polarity scale [ATNTS04, Lourens et al. 2004] with the help of biostratigraphy based on calcareous nannofossils and planctonic foraminifers [Oudet et al., 2010]. The resulting age model shows that the 100 m-thick sedimentary succession covers a time span of 5 m.y. from the Late Chattian to the Early Burdigalian. Despite several exposure surfaces and a change in the sedimentation rate, no significant hiatus of sedimentation is documented. In addition, we also estimate the paleoenvironmental evolution through the sedimentary succession. Comparing the dated paleoenvironmental reconstruction with global {delta}18O and sea level curves [Miller et al., 2005], we show that the Carry-le-Rouet succession is an excellent paleoclimatic archive. Indeed, coral reefs developed at the glacial-interglacial stage transition marking the end of the Oligocene. In addition, the most diversified coral reefs occurred during the warmest period of the Aquitanian. During rifting, bathymetric variations recorded in the studied succession are related to local synsedimentary tectonics whereas, during oceanic crust accretion, global sea level changes influence the sedimentation. This result allows to characterise and to accurately date the break-up unconformity at 20.35 Ma.</description>
<date>2011-01-01</date>
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