Reconstruction of Northern African monsoon between 6.2 and 4.9 Ma and possible relationships with Late Miocene events
Restitution de l’histoire de la mousson nord-africaine entre 6,2 et 4,9 Ma et relations possibles avec les événements tardi-Miocène
Résumé
Reconstruction of Northern African monsoon between 6.2 and 4.9 Ma and possible relationships with Late Miocene events. Mineralogical and geochemical investigations have been realized on ODP Site 659 in order to better understand the detrital sedimentation of the Cap Verde plateau and to reconstruct African monsoon intensity variations between 6.2 and 4.9 Ma. Time intervals corresponding to an intensification of the summer African monsoon rainfall are associated to a reduction of eolian input from the Sahara and an intensification of the African river input. The reflooding of the Mediterranean Sea at the end of the Messinian salinity crisis (MSC) (5.33 Ma) is correlated to a greater aridity in the Sahara.
Origine | Accord explicite pour ce dépôt |
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