Contribution to the geochemistry of uranium from sedimentary rocks and particularly from carboniferous schists

Whereas fixation of uranium by sediments occurs with such an importance that these sediments may be actual uranium sources, and as it notably the case for carboniferous shales, the author aimed at understanding mechanisms which govern the enrichment of black shales in uranium in the case of the Saint-Hippolyte site. The author first presents the main properties of uranium in solution which may help the understanding of its geochemistry. He proposes a summarised presentation of works which addressed uranium-containing black shales in order to have an overview of present knowledge. Then, based on relationships between uranium and some constituents of these shales, he tries to highlight valid hypotheses of formation. Article published in 'Bulletin du Service de la carte geologique d'Alsace et de Lorraine', tome 14, no. 4, 1961. Sedimentologie et pedologie, geochimie de la surface 1961. pp. 179-208.