Stratigraphic simulations of the shelf of the Gulf of Lions: testing subsidence rates and sea-level curves during the Pliocene and Quaternary
|Author(s)||Leroux Estelle1, 2, Rabineau Marina1, Aslanian Daniel2, Granjeon Didier3, Droz Laurence1, Gorini Christian4|
|Affiliation(s)||1 : UBO, CNRS, IUEM, UMR6538,Domaines Ocean, F-29280 Plouzane, France.
2 : IFREMER, Ctr Brest, GM, F-29280 Plouzane, France.
3 : IFP Energies Nouvelles, F-92852 Rueil Malmaison, France.
4 : Univ Paris 06, UMR 7193, ISTEP, F-75005 Paris, France.
|Source||Terra Nova (0954-4879) (Wiley-blackwell), 2014-06 , Vol. 26 , N. 3 , P. 230-238|
|WOS© Times Cited||24|
|Abstract||Determining the relative importance of factors interacting to control stratigraphic organization is a key issue in sedimentology. The Pliocene-Quaternary chronostratigraphy on the Gulf of Lions platform is still poorly constrained, giving rise to different interpretations of the evolution of its subsidence through time. This paper examines the Pliocene-Quaternary sedimentary filling of the Gulf of Lion's shelf with Dionisos, a numerical stratigraphic model. Our results show that a constant subsidence rate accurately reproduces the observed geometries, whereas a varying subsidence rate reproduces them only if the acceleration of subsidence is limited. At this time-scale, a third-order eustatic curve is also reappraised: a higher resolution curve (built using δ18O measurements) gives a more realistic restitution of our stratigraphic markers. Finally, the constant subsidence rate and sediment fluxes implied in these modellings are discussed relative to climate and local factors of sedimentation|