Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Limnology and Oceanography 1481-1490 OCEAN ATLANTIQUE ANGOLA BASSIN 2013 fdi:010060621 ENG Limnology and Oceanography 0024-3590 ISI:000322514600026 4 10.4319/lo.2013.58.4.1481 https://www.documentation.ird.fr/hor/fdi:010060621 https://www.documentation.ird.fr/intranet/publi/2013/09/010060621.pdf 58 Horizon (IRD) We report the distribution of cadmium at 13 stations along 5.83 degrees S in the Angola Basin. The studied area (which is influenced by the plume of the Congo River, doming, and relatively high primary production) is characterized by relatively low-circulation regime, which results in a strong oxygen minimum. In subsurface, very low cadmium : phosphate (Cd : P) ratios (0.05-0.10 nmol L-1 : mu mol L-1) were observed below the euphotic zone (depth range = 50-200 m), indicating that mineralization is the main process explaining the Cd-P fractionation. Cd-P decoupling is not restricted to subsurface waters, but occurs also throughout the oxygen minimum zone. An isopycnal analysis of the Cd : P ratio throughout the Atlantic Ocean shows that upper and intermediate waters in the South-east Atlantic are highly altered in terms of Cd-P properties. Benthic inputs at 4000 m were associated with degradation of organic matter with an important siliceous component, but were not accompanied by substantial changes in the Cd : P ratio. 032 UR195 / US191