Sedimentary markers in the Provençal Basin (western Mediterranean): a window into deep geodynamic processes
|Author(s)||Leroux Estelle1, 2, Aslanian Daniel3, Rabineau Marina2, Moulin Maryline3, Granjeon Didier4, Gorini Christian1, Droz Laurence2|
|Affiliation(s)||1 : Univ Paris 06, UPMC, ISTEP, UMR 7193, F-75005 Paris, France.
2 : IUEM UBO, CNRS, UMR6538, Domaines Ocean, F-29280 Plouzane, France.
3 : IFREMER, Ctr Brest, GM, F-29280 Plouzane, France.
4 : IFP Energies Nouvelles, F-92852 Rueil Malmaison, France.
|Source||Terra Nova (0954-4879) (Wiley-blackwell), 2015-04 , Vol. 27 , N. 2 , P. 122-129|
|WOS© Times Cited||9|
|Abstract||Deep Earth dynamics impact so strongly on surface geological processes that we can use sediment palaeo-markers as a window into the deeper Earth. Derived from climatic and tectonic erosive actions on the continents, and related to eustasy, subsidence and isostasy, the sediment in a deep basin is the main recorder of these processes. Nevertheless, defining and quantifying the relative roles of parameters that interact to give the final sedimentary architecture is not a simple task. Using a 3D-grid of seismic and wide-angle data, boreholes and numerical stratigraphic modelling, we propose here a quantification of post-rift vertical movements in the Provençal Basin (West Mediterranean) involving three domains of subsidence: seaward tilting on the platform and the slope and purely vertical subsidence in the deep basin. These domains fit the deeper crustal domains highlighted by previous geophysical data. Post-break-up sedimentary markers may therefore be used to identify the initial hinge lines of the rifting phase and the subsidence laws.|