Tracing past migrations of uranium in Paleoproterozoic basins: New insights from radiation-induced defects in clay minerals

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Research Article| November 01, 2010 Tracing past migrations of uranium in Paleoproterozoic basins: New insights from radiation-induced defects in clay minerals E. Morichon; E. Morichon * 1Université de Poitiers, laboratoire HydrASA, CNRS-UMR 6269, 40 avenue du Recteur Pineau, F-86022 Poitiers Cedex, France2IMPMC de Paris, CNRS-UMR 7590, Universités Paris 6 et 7, IPGP campus Boucicaut, Bât. 7, 140 rue de Lourmel, 75015 Paris, France *E-mail: elisa.morichon@univ-poitiers.fr. Search for other works by this author on: GSW Google Scholar D. Beaufort; D. Beaufort 1Université de Poitiers, laboratoire HydrASA, CNRS-UMR 6269, 40 avenue du Recteur Pineau, F-86022 Poitiers Cedex, France Search for other works by this author on: GSW Google Scholar T. Allard; T. Allard 2IMPMC de Paris, CNRS-UMR 7590, Universités Paris 6 et 7, IPGP campus Boucicaut, Bât. 7, 140 rue de Lourmel, 75015 Paris, France Search for other works by this author on: GSW Google Scholar D. Quirt D. Quirt 3AREVA Resources Canada Inc., P.O. Box 9204, Saskatoon, SK S7K 3X5, Canada Search for other works by this author on: GSW Google Scholar Geology (2010) 38 (11): 983–986. https://doi.org/10.1130/G31453.1 Article history received: 07 Jun 2010 rev-recd: 15 Jun 2010 accepted: 15 Jun 2010 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation E. Morichon, D. Beaufort, T. Allard, D. Quirt; Tracing past migrations of uranium in Paleoproterozoic basins: New insights from radiation-induced defects in clay minerals. Geology 2010;; 38 (11): 983–986. doi: https://doi.org/10.1130/G31453.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Radiation-induced defects were identified in kaolinite, illite, and sudoite by electron paramagnetic resonance spectroscopy of the alteration halo surrounding the uranium orebodies in the Athabasca Basin (Saskatchewan, Canada). Clay minerals are assumed to behave similarly under irradiation. In all samples, defects are similar in nature, but their concentrations can vary widely over several orders of magnitude. The maximum fluctuations in defect concentrations are observed along the regional Paleoproterozoic unconformity between the lower sandstones and the metamorphic basement rocks and close to crosscutting brittle structures, both of which appear to be the main vectors of uranium-bearing fluid transfer in the basin. In the basement, some Hudsonian faults connected to this unconformity also show high defect concentrations, attesting that uranium-bearing fluids may have circulated in the fracture network. The proximity of mineralization can be revealed through defects that record the past presence of uranium in altered rocks at significant distances from the mineralized bodies. The absence of correlation between defect concentrations and present dose rates indicates that migrations of uranium-bearing fluids took place after the formation of clay minerals. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.