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Bulletin de la Societe Geologique de France; March 2004; v. 175; no. 2; p. 107-119; DOI: 10.2113/175.2.107
© 2004 Societe Geologique de France
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A sequence analyzed from the basin to the platform : the Middle Oxfordian calcareous succession in southeastern France

Christian Gaillard1, Laurent Emmanuel2, Micheline Hanzo3, Bernard Lathuiliere3, François Atrops1, Yves Bodeur4, Abdelkader Bouhamdi1, Didier Marchand5, Raymond Enay1, Christiane Ruget6 and Winfried Werner7

1 UMR 5125, Paléoenvironnements et Paléobiosphère, Université Claude Bernard, Lyon 1, Géode, 2 rue Raphaël Dubois, F 69622 Villeurbanne cedex, France. Christian.Gaillard{at}univ-lyon1.fr – Francois.Atrops{at}univ-lyon1.fr
2 FR 32, Département de Géologie Sédimentaire, Université P&M Curie, Case 116, 4 place Jussieu, F 75252 Paris cedex 05, France. lemmanuel{at}ccr.jussieu.fr
3 UMR G2R, Géologie des Bassins sédimentaires, Université Henri Poincaré, Nancy1, BP 239, F 54506 Vandoeuvre-les-Nancy cedex, France. Bernard.Lathuiliere{at}g2r.uhp-nancy.fr – Micheline.Hanzo{at}g2r.uhp-nancy.fr
4 Laboratoire de Géologie, Université de Nantes, BP 92908, 2 rue de la Houssinière, F 44072 Nantes cedex, France. Yves.Bodeur{at}chimie.univ-nantes.fr
5 UMR 5561, Biogéosciences, Centre des Sciences de la Terre, Université de Bourgogne, 6 boulevard Gabriel, F 21100 Dijon, France. Didier.Marchand{at}u-bourgogne.fr
6 Chipier, route de Pimotin, F 69420 Tupin et Semons, France.
7 Bayer. Staats. Paläont. Hist. Geol., Richard Wagner Strasse 10. D 80333 München, Allemagne. w.werner{at}lrz.uni-muenchen.de

Abstract

Middle Oxfordian sedimentation is very homogeneous in southeastern France. It is characterized by a specific alternation of marls and fine-grained limestones (G. transversarium Zone). This work shows that sets of calcareous beds allow accurate stratigraphic correlations in various paleogeographic areas, from the shallow Jura platform to the deep Dauphinois basin. Following a rifting period, this sedimentation illustrates a doming period with decreasing subsidence and water depth. This corresponds to the establishment of a wide marine area more favourable to carbonate sedimentation. Considering sequence stratigraphy, some slight variations occur in the sediment record and lead to interesting comparisons between the platform and the basin. The geochemical evolution, mainly the manganese content, seems to be dependant of the activity of the Ligurian Tethys oceanic ridge. This fact shows that sedimentation in southeastern France could be significantly controlled by tectono-eustasy.

Key Words: Sequence stratigraphy • Chemostratigraphy • Tectono-eustasy • Platform/basin correlations • Oxfordian • Southeastern France






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