Paleoceanographical Reconstructions of the
Ducassou, Emmanuelle1, Anne Murat2, Sebastien Migeon3, Eliane Gonthier1, Thierry Mulder1, Jean Mascle3, Stefano Bernasconi4, Lucilla Capotondi5, Josette Duprat1, Pierre Carbonel1 (1) University Bordeaux 1, Talence Cedex, France (2) Cnam-Intechmer, 50103 Cherbourg Cedex, France (3) UMR Geosciences Azur, Villefranche sur Mer, 6 France (4) Geologisches Institut, Zuerich, Switzerland (5) Istituto per la Geologia Marina, Bologna, Italy
The Nile deep-sea fan is the largest sedimentary body of the
The detailed study of 45 sediment cores allows to estimate this climatic forcing at high and low frequencies on pelagic and terrigeneous sedimentation.
To obtain the sedimentological and palaeoceanographical process reconstructions for the last 500,000 years, the lithological facies analysis and geochemistry have been supported by an accurate stratigraphy (tephrochronology, sapropels, biostratigraphy, stable and radiogenic isotopes).
The main observations show a wide range of sedimentary dispersal and depositional processes from west to east as typical turbiditic channel-levee complexes and terminal lobes, and their migration, giant sediment failures of the upper slope or deformed morphologies due to the gravitational tectonics.
complex, in the western province, is the most recent turbiditic
system. Its setting up, growth and migration seem to occur during the last glaciation (marine isotope stages 4, 3 and 2). On the
contrary, the eastern province of the