Radiogenic lead mobility in the Shea Creek unconformity-related uranium deposit (Saskatchewan, Canada) : migration pathways and Pb loss quantification

Philippe Kister and Michel Cuney and Viacheslav N. Golubev and Jean-Jacques Royer and Christian Le Carlier de Veslud and Jean-Claude Rippert. ( 2004 )
in: Comptes rendus Académie des sciences Geoscience Geochemistry, 336 (205--215)

Abstract

The average Pb/U ratio of the Shea Creek unconformity-type uranium deposit has been estimated at 0.071±0.015. The calculation was performed on a volume enclosing the orebody to take into account the possible radiogenic lead migration within the ore zone. Despite this precaution, this ratio is significantly lower than the expected ratio (0.211) assuming a main U deposition around 1315 Ma, as suggested by previous UPb isotopic dating. Although part of the radiogenic lead can be trapped as galena within the orebody, about 60% of Pb have migrated more than 700 m away from the orebody, preferentially along the unconformity.

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BibTeX Reference

@ARTICLE{,
    author = { Kister, Philippe and Cuney, Michel and N. Golubev, Viacheslav and Royer, Jean-Jacques and Le Carlier de Veslud, Christian and Rippert, Jean-Claude },
     title = { Radiogenic lead mobility in the Shea Creek unconformity-related uranium deposit (Saskatchewan, Canada) : migration pathways and Pb loss quantification },
   journal = { Comptes rendus Académie des sciences Geoscience Geochemistry },
    volume = { 336 },
   chapter = { 0 },
      year = { 2004 },
     pages = { 205--215 },
       doi = { 10.1016/j.crte.2003.11.006 },
  abstract = { The average Pb/U ratio of the Shea Creek unconformity-type uranium deposit has been estimated at 0.071±0.015. The calculation was performed on a volume enclosing the orebody to take into account the possible radiogenic lead migration within the ore zone. Despite this precaution, this ratio is significantly lower than the expected ratio (0.211) assuming a main U deposition around 1315 Ma, as suggested by previous UPb isotopic dating. Although part of the radiogenic lead can be trapped as galena within the orebody, about 60% of Pb have migrated more than 700 m away from the orebody, preferentially along the unconformity. }
}