Abstract
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.
Similar content being viewed by others
References
Bois C.: Rev Fr. IFP 37 (1982) 135.
Bekri O. and Ziyad M.: Abstract presented at Oil Shale Symposium (1991) Lexington, Kentucky, U.S.A.
Adams, J.A. and Weaver, C.E.: Bulletin American Association of Petroleum Geologists 42(2) (1958) 387.
Schultz M.K., Burnett, W.C., and Inn, K.G.W.: Journal of Environmental Radioactivity 40 (1998) 155.
Blanco P., Vera Tome F., and Lozano J.C.: Journal of Environmental Radioactivity 79 (2005) 315.
Tessier A., Campbell P.G.C., and Bisson M.: Anal. Chem. 51 (1979) 844.
Rahhali, I.: Notes Serv. Géol. Maroc 30 (1970) 51.
Benalioulhaj, N.: Les formations à phosphates et à schistes bitumineux du bassin des oulad-Abdoun et du bassin de Timahdit (Maroc): pétrographie, minéralogie, géochimie et environnement de dépôt. Thesis (1991) Université Louis Pasteur, Strasbourg.
Galindo C., Mougin L., and Nourreddine A.N., to be published in Applied Radiations and Isotopes (2006).
Tribovillard N., Algeo T.J., Lyons T., and Riboulleau A.: Chemical Geology, in press (2006).
Galindo C. et al.: to be published in Journal of Radioactivity (2006).
Kelly S.D. et al.: Env. Sci. Tech. 37 (2003) 1284.
Ivanovich M. and Harmon R.S.: Uranium-series disequilibrium: applications to Earth, Marine, and Environmental Sciences, 2nd edition, Clarendon Press, Oxford, New-York (1992).
Klinkhammer G. P. and Palmer M. R.: Geochimica et Cosmochimica Acta 55 (1991) 1799.
Swanson V.E.: LR Page H.E. Stocking and H.B. Smith Editors, Contributions to the geology of uranium and thorium by the United States Geological Survey and the Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955, US Geol.Surv.Prof. Pap. 300 (1956) 451.
Kochenov, A.V. and Baturin, G.N.: Lithology and Mineral Resources 37 (2002) 107.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Galindo, C., Mougin, L., Nourreddine, A. et al. Study of the partitioning of uranium and thorium in moroccan black shale. Czech J Phys 56, D49–D54 (2006). https://doi.org/10.1007/s10582-006-1066-6
Issue Date:
DOI: https://doi.org/10.1007/s10582-006-1066-6