Czechoslovak Journal of Physics

, Volume 56, Supplement 4, pp D49–D54 | Cite as

Study of the partitioning of uranium and thorium in Moroccan black shale

  • C. Galindo
  • L. Mougin
  • A. Nourreddine
  • S. Fakhi


Moroccan black shale was analysed for uranium and thorium isotopes using alpha-spectrometry. A sequential leaching procedure was used to define the speciation of isotopes of the actinides in the material. As in most other organic rich rocks, uranium is highly enriched in the black shale. This actinide is associated predominantly with humic acids. Thorium (232Th) is a less mobile radionuclide in this environment as was expected from its chemical properties, and in agreement with the most widely adopted views in the published literature. It is partitioned between silicate minerals, pyrite and kerogen.


Uranium Pyrite Humic Acid Thorium Kerogen 
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Copyright information

© Institute of Physics, Academy of Sciences of Czech Republic 2006

Authors and Affiliations

  • C. Galindo
    • 1
  • L. Mougin
    • 1
  • A. Nourreddine
    • 1
  • S. Fakhi
    • 2
  1. 1.Institut Pluridisciplinaire Hubert CurienStrasbourg Cedex 2France
  2. 2.Faculté des Sciences Ben M’sikLaboratoire de Radiochimie (LRC)CasablancaMorocco

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