Etude couplée des fractionnements isotopiques du LI, B et U dans des profils d'altération : exemple du bassin versant du Strengbach (Vosges, France)

Abstract : In-depth comparison of the response of various selected isotopic tools (Li, B and U) during chemical weathering in an already known profile (eg the Summit profile in the Strengbach watershed, Ackerer, 2017) to identify the driving mechanisms of isotopic fractionations of these elements to link the response of these tools compared to the chemical alteration to go back to the alteration regime.Develop the observations made on the Summit profile and apply them to five other weathering profiles distributed over the entire watershed focusing on the <2μm fraction. This will make it possible to see if the observations made in the first profile are found in the other profiles and if we are able to go back to the alteration regime. Preliminarily investigate how the isotopic signal of chemical alteration acquired in alteration profiles evolves during the sediment transportation and if it is possible to determine the alteration regime of a watershed from it sediments.
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Justine Negrel. Etude couplée des fractionnements isotopiques du LI, B et U dans des profils d'altération : exemple du bassin versant du Strengbach (Vosges, France). Géochimie. Université de Strasbourg, 2019. Français. ⟨NNT : 2019STRAH001⟩. ⟨tel-02305371⟩

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