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| Moreno, Eva; Caroir, Fabien; Fournier, Lea; Fauquembergue, Kelly; Zaragosi, Sébastien; Joussain, Ronan; Colin, Christophe; Blanc-valleron, Marie-madeleine; Baudin, François; De Garidel-thoron, Thibault; Valet, Jean Pierre; Bassinot, Franck. |
| We present here a study based on the Anisotropy of Magnetic Susceptibility (AMS) and magnetic mineralogy carried out on the composite core MD17&18taken from the eastern levee of the active channel of the middle Bengal Fan in the Indian Ocean. Based on C-14 dating, the sedimentary sequence covers 9.8 ka in 39 m of sediment. It therefore records at very high resolution the variations in continental material exported to the ocean by the Ganges-Brahmaputra river system during the Holocene. This sequence was divided into two units according to turbidite activity: Unit 1 from 9.8 to 9.2 ka cal. Representing 39 m of coarse-grained turbidite sequences (coarse silts to fine sands) and extremely high sedimentation rates. Unit 2 of 9.2 ka cal. BP to the present... |
| Tipo: Text |
Palavras-chave: Bengal fan; Holocene; Turbidite activity; Magnetic fabric; Magnetic mineralogy. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00652/76388/77402.pdf |
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| Fauquembergue, Kelly. |
| Over the past decade, the Little Bahamas Bank (LBB) in the Caribbean has been at the heart of oceanographic cruises Carambar (2010), Caramba 1.5 (2014) and Carambar 2 (2016-2017). These scientific expeditions were carried out with the aim of improving our knowledge of the processes that controlled sediment export during the Quaternary in this tropical setting. Thus, bathymetric data covering some 24,270 km² of seabed, high-resolution seismic lines running over 6,398 km and 42 sediment cores ranging from 177 to 4,873 m water depth were collected in the upper slope through to the abyssal plane of the LBB system. This study focusses on those sediment cores retrieved in the upper (Carambar 1.5) and lower slope of the LBB and those from the Great Canyon... |
| Tipo: Text |
Palavras-chave: Bahamas; Pente; Cabonates; Ouragans; Fronts froids; Bahamas; Slope; Carbonates; Hurricanes; Cold Fronts. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00684/79601/82297.pdf |
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