Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel)
The morphology and present-day sediment distribution of the Zambezi turbidite system was investigated using new bathymetric and sub-bottom profiler data as part of the PAMELA research project. The Zambezi turbidite system is composed of two depositional systems: a channelized fan (the Zambezi Fan) a...
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ftarchimer:oai:archimer.ifremer.fr:59425 2023-05-15T17:13:54+02:00 Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel) Fierens, Ruth Droz, Laurence Toucanne, Samuel Raisson, François Jouet, Gwenael Babonneau, Nathalie Miramontes Garcia, Elda Landurain, Steven Jorry, Stephan 2019-06 application/pdf https://archimer.ifremer.fr/doc/00483/59425/62240.pdf https://doi.org/10.1016/j.geomorph.2019.02.033 https://archimer.ifremer.fr/doc/00483/59425/ eng eng Elsevier BV https://archimer.ifremer.fr/doc/00483/59425/62240.pdf doi:10.1016/j.geomorph.2019.02.033 https://archimer.ifremer.fr/doc/00483/59425/ info:eu-repo/semantics/openAccess restricted use Geomorphology (0169-555X) (Elsevier BV), 2019-06 , Vol. 334 , P. 1-28 Zambezi turbidite system Late Quaternary Multibeam bathymetry Sub-bottom seismic profiles text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.1016/j.geomorph.2019.02.033 2021-09-23T20:32:13Z The morphology and present-day sediment distribution of the Zambezi turbidite system was investigated using new bathymetric and sub-bottom profiler data as part of the PAMELA research project. The Zambezi turbidite system is composed of two depositional systems: a channelized fan (the Zambezi Fan) and a semi-confined fan (in the lntermediate Basin). The Zambezi Fan includes the Zambezi Valley, which is deeply incised in the Mozambique Channel and is more than three times as large and deep as the great Tanzanian and North Atlantic Mid-Ocean channels. The erosion in the Zambezi Valley is evidenced by its V-shaped morphology and the existence of a U-shaped thalweg affected by several generations of incisions. Based on echo facies and cores from literature, sediments of the Zambezi Fan are dominantly coarse-grained and fine-grained overbank deposits are infrequent. The distal portion of the Zambezi Fan is a main depositional area where typical transparent wedged-shape seismic bodies are interpreted as terminal lobes. Seismic facies in the Intermediate Basin are thought to represent mostly fine-grained turbidites intercalated with infrequent coarse-grained sheet-like turbidites. Hydrodynamic circulation (from surface eddies to the deep circulation of NADW) appears to have a great impact on the Mozambique Channel sedimentation and is suggested (1) to be involved in the delivery of the Zambezi River sediments along the Mozambique margin, (2) to entrain the upper suspended load of turbidity currents, contributing to the absence of fine-grained sedimentation and (3) to contribute to the erosion of the valley flanks leading to the exceptionally great dimensions of the valley. Article in Journal/Newspaper NADW North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Geomorphology 334 1 28 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Zambezi turbidite system Late Quaternary Multibeam bathymetry Sub-bottom seismic profiles |
spellingShingle |
Zambezi turbidite system Late Quaternary Multibeam bathymetry Sub-bottom seismic profiles Fierens, Ruth Droz, Laurence Toucanne, Samuel Raisson, François Jouet, Gwenael Babonneau, Nathalie Miramontes Garcia, Elda Landurain, Steven Jorry, Stephan Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel) |
topic_facet |
Zambezi turbidite system Late Quaternary Multibeam bathymetry Sub-bottom seismic profiles |
description |
The morphology and present-day sediment distribution of the Zambezi turbidite system was investigated using new bathymetric and sub-bottom profiler data as part of the PAMELA research project. The Zambezi turbidite system is composed of two depositional systems: a channelized fan (the Zambezi Fan) and a semi-confined fan (in the lntermediate Basin). The Zambezi Fan includes the Zambezi Valley, which is deeply incised in the Mozambique Channel and is more than three times as large and deep as the great Tanzanian and North Atlantic Mid-Ocean channels. The erosion in the Zambezi Valley is evidenced by its V-shaped morphology and the existence of a U-shaped thalweg affected by several generations of incisions. Based on echo facies and cores from literature, sediments of the Zambezi Fan are dominantly coarse-grained and fine-grained overbank deposits are infrequent. The distal portion of the Zambezi Fan is a main depositional area where typical transparent wedged-shape seismic bodies are interpreted as terminal lobes. Seismic facies in the Intermediate Basin are thought to represent mostly fine-grained turbidites intercalated with infrequent coarse-grained sheet-like turbidites. Hydrodynamic circulation (from surface eddies to the deep circulation of NADW) appears to have a great impact on the Mozambique Channel sedimentation and is suggested (1) to be involved in the delivery of the Zambezi River sediments along the Mozambique margin, (2) to entrain the upper suspended load of turbidity currents, contributing to the absence of fine-grained sedimentation and (3) to contribute to the erosion of the valley flanks leading to the exceptionally great dimensions of the valley. |
format |
Article in Journal/Newspaper |
author |
Fierens, Ruth Droz, Laurence Toucanne, Samuel Raisson, François Jouet, Gwenael Babonneau, Nathalie Miramontes Garcia, Elda Landurain, Steven Jorry, Stephan |
author_facet |
Fierens, Ruth Droz, Laurence Toucanne, Samuel Raisson, François Jouet, Gwenael Babonneau, Nathalie Miramontes Garcia, Elda Landurain, Steven Jorry, Stephan |
author_sort |
Fierens, Ruth |
title |
Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel) |
title_short |
Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel) |
title_full |
Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel) |
title_fullStr |
Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel) |
title_full_unstemmed |
Late Quaternary geomorphology and sedimentary processes in the Zambezi turbidite system (Mozambique Channel) |
title_sort |
late quaternary geomorphology and sedimentary processes in the zambezi turbidite system (mozambique channel) |
publisher |
Elsevier BV |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00483/59425/62240.pdf https://doi.org/10.1016/j.geomorph.2019.02.033 https://archimer.ifremer.fr/doc/00483/59425/ |
genre |
NADW North Atlantic |
genre_facet |
NADW North Atlantic |
op_source |
Geomorphology (0169-555X) (Elsevier BV), 2019-06 , Vol. 334 , P. 1-28 |
op_relation |
https://archimer.ifremer.fr/doc/00483/59425/62240.pdf doi:10.1016/j.geomorph.2019.02.033 https://archimer.ifremer.fr/doc/00483/59425/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.geomorph.2019.02.033 |
container_title |
Geomorphology |
container_volume |
334 |
container_start_page |
1 |
op_container_end_page |
28 |
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1766071104461340672 |