Organic carbon accumulation in modern sediments of the Angola basin influenced by the Congo deep sea fan
RABOUILLE, Christophe
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
Océan et Interfaces [OCEANIS]
< Réduire
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
Océan et Interfaces [OCEANIS]
Langue
EN
Article de revue
Ce document a été publié dans
Deep Sea Research Part II: Topical Studies in Oceanography. 2017, vol. 142, p. 64-74
Résumé en anglais
Geochemical data (total organic carbon-TOC content, δ13Corg, C:N, Rock-Eval analyses) were obtained on 150 core tops from the Angola basin, with a special focus on the Congo deep sea fan. Combined with the previously ...Lire la suite >
Geochemical data (total organic carbon-TOC content, δ13Corg, C:N, Rock-Eval analyses) were obtained on 150 core tops from the Angola basin, with a special focus on the Congo deep sea fan. Combined with the previously published data, the resulting dataset (322 stations) shows a good spatial and bathymetric representativeness. TOC content and δ13Corg maps of the Angola basin were generated using this enhanced dataset. The main difference in our map with previously published ones is the high terrestrial organic matter content observed downslope along the active turbidite channel of the Congo deep sea fan till the distal lobe complex near 5000 m of water-depth. Interpretation of downslope trends in TOC content and organic matter composition indicates that lateral particle transport by turbidity currents is the primary mechanism controlling supply and burial of organic matter in the bathypelagic depths.< Réduire
Mots clés en anglais
Organic matter
Recent sediments
South Atlantic Ocean
Turbidites
Project ANR
Transfert de carbone organique et fonctionnement des écosystèmes dans les lobes terminaux de l'éventail sous-marin du Congo - ANR-11-BS56-0030