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Controls on turbidite sedimentation: Insights from a quantitative approach of submarine channel and lobe architecture (Late Quaternary Congo fan) ArchiMer
Picot, M.; Droz, L.; Marsset, Tania; Dennielou, Bernard; Bez, M..
The role of internal and external forcing of sedimentation in turbidite systems remains a subject of debate. Here we propose new insights from the quantitative analysis of architectural parameters of the Congo Axial Fan. Fifty-two channel-levee-lobe systems, spanning the last ca. 200 ka, are visible on the seafloor, most of them having slightly elongated lobe complexes at their termination. Volumes of lobe complexes (usually 3 to 196 km3) are highly variable in time and space. The cumulative volume of the lobe complexes represents approximately 30% of the volume of the Axial Fan. The Axial Fan is sequentially divided into periods of increasing/decreasing channel lengths and basinward/landward migrations of avulsion points, representing successive...
Tipo: Text Palavras-chave: Turbidite system; Congo; Late Quaternary; Lobe complexes; Sedimentary cycles; Avulsion; Bathymetry; Seismic profiles.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00312/42285/41610.pdf
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