Both chlorine and bromine are conservative elements in aqueous transport. Therefor, abundances of their stable isotopes can only change with physical processes affecting the fluid transport (diffuion, ion filtration, mixing...). Our laboratory is one of the few in the world which is able to measure with a high precision stable isotopes compositions of chlorine and bromine.
The aim of this thesis is to develop these isotopic systems in order to better constrain surface and subsurface hydrological processes. We explore such kind of processes with labscale exprimental works (diffusion and ion filtration), as well as with natural environnements studies.