Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago
- Grenier, Mélanie
- Brown, K.A.
- Colombo, M.
- Belhadj, M.
- Baconnais, I.
- Pham, V.
- Soon, M.
- Myers, P.G.
- Jeandel, C.
- François, R.
DOIAbstract
International audienceDetermining the factors controlling the neodymium (Nd) isotopic compositions (expressed as ε Nd) and rare earth element (REE) concentrations of rivers is imperative to improve our understanding of the distribution of these water mass tracers in the ocean. Here we present the first measurements of <0.45 μm-filtrate REE concentrations (i.e., the concentration of truly dissolved, nano-particulate and colloidal REEs passing through a 0.45 μm filter, hereafter referred to as dissolved) and ε Nd in rivers draining into the Canadian Arctic Archipelago (CAA). Results show a large variation in both REE concentrations (Nd = [8; 37, 260] pmol/kg) and ε Nd ([−32.1; −15.1]) in the thirteen rivers sampled. Dissolved REE concentratio...
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