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Fig. 3

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Depth variation of the mineral and organic composition of the sediment core taken in the deep depression. A: BD: bulk density (g.cm−3); B: Pb: total lead (cps); C: 137Cs: 137-Cesium activity (bq.kg−1); D: Ti: titanium (cps); E: Si/Ti: silicon/titanium ratio (cps/cps); F: Corg: organic carbon content (%); G: C/N: carbon/nitrogen ratio; H: δ13C (‰).

Composition minérale et organique en fonction de la profondeur de la carotte de sédiment prélevée dans la dépression profonde. A : BD : densité apparente (g.cm−3) ; B : Pb : plomb total (cps) ; C : 137Cs : activité du 137-Cesium (bq.kg−1) ; D : Ti : titane (cps) ; E : Si/Ti : ratio silicium/titane (cps/cps) ; F : Corg : carbon organique (%) ; G : C/N : ratio carbone/azote ; H : δ13C (‰).

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