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L'étude a consisté à comparer l'anisotropie de susceptibilité magnétique (ASM) et les teneurs en éléments traces de grès latéritiques stériles et de grès ferrugineux hydrothermalisés riches en barytine du gisement de Chaillac. La gœthite est le principal porteur de l'ASM. Ces deux grès possèdent des ASM distinctes et des anomalies caractéristiques respectivement en Ti et As. À partir de ces résultats,...
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