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Direct observations of the 3D pore network of a Callovo-Oxfordian claystone

type de publication      communication internationale avec actes publiés
date de publication 22-10-2012
auteur(s) Robinet Jean-Charles; Davy Catherine A.; Ghayaza Mariem; Skoczylas Frédéric; Troadec David; Sardini Paul; Talandier Jean
  
conférence 5th International Meeting on Clays in Natural and Engineered Barriers for Radioactive Waste Management
     dates de 22-10-2012 à 25-10-2012
     lieu Montpellier, France
     nom des actes Book of abstracts of the 5th International Meeting on Clays in Natural and Engineered Barriers for Radioactive Waste Management
  
résumé Small scale pores and mineral organisation of the COx claystone are widely acknowledged to control transfer properties of water, gas and varied solutes. In order to assess these properties, the COx small-scale structure has been imaged down to micrometric resolution by various means, including classical Scanning Electron Microscopy (SEM) [Sammartino-2003, Robinet-2008], X-ray computed microtomography [Robinet-2008] and autoradiography [Sammartino-2003]. To go further into pore and mineral characterisation of COx claystone, the following investigations are currently under way: (i) acquiring/quantifying the 3D geometry of the pore network of undisturbed COx with a nanometric resolution and (ii) imaging/quantifying the small-scale (mm-nm) structure of self-sealed volumes, both using a FIB/SEM.
mots clés argilite, SEM, FIB/SEM, self-sealing, gas migration
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