New findings of contourite-related structures and their implications on oceanographic and sedimentary conditions on the Demerara Plateau (French Guiana and Surinam)
Tallobre, C.; Giresse, P.; Loncke, L.; Bayon, G.; Bassetti, M.-A.; Randla, M.; Buscail, R.; Durrieu de Madron, X.; Bourrin, F.; Kunesch, S.; Sotin, C.; Serge, B.; Vanhaesebroucke, M. (2014). New findings of contourite-related structures and their implications on oceanographic and sedimentary conditions on the Demerara Plateau (French Guiana and Surinam), in: Van Rooij, D. et al. (Ed.) Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication, 69: pp. 127-128 In: Van Rooij, D.; Rüggeberg, A. (Ed.) (2014). Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication, 69. Ghent University, Department of Geology and Soil Science/Flanders Marine Institute (VLIZ): Oostende. xviii, 152 pp., more In: VLIZ Special Publication. Vlaams Instituut voor de Zee (VLIZ): Oostende. ISSN 1377-0950, more |  |
| Available in | Authors | | Document type: Summary
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| Keywords | Sediments > Clastics > Contourites
ASW, Guyana [Marine Regions]
Marine/Coastal | | Author keywords | Demerara Plateau; Western Equatorial Atlantic |
| Authors | | Top | - Tallobre, C.
- Giresse, P.
- Loncke, L.
- Bayon, G., more
- Bassetti, M.-A.
| - Randla, M.
- Buscail, R.
- Durrieu de Madron, X.
- Bourrin, F.
| - Kunesch, S.
- Sotin, C.
- Serge, B.
- Vanhaesebroucke, M.
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| Abstract | We report preliminary data for a multidisciplinary investigation of the eastern Demerara Plateau conducted in 2013 during the IGUANES cruise (seismic and bathymetric data, sediment cores, and mooring). Our first observations show the presence of a vast field of longitudinal bed forms and comet marks between 2000 and 2800m water depth, with a NW-SE orientation, which indicate strong bottom water currents in this area. Preliminary analyses of the sediment cores and the mooring data (positioned 3064m depth) support the occurrence of active winnowing and contourite deposition, most probably related to the southward flow of the North Atlantic Deep Water (NADW). |
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