SAILLET , Elodie

Outcrops of the Cretaceous high-porosity sandstone of the Southeast Basin, France, show two main types of deformation structures: a large number of small-offset, shear-enhanced cataclastic deformation bands (DBs); and a small number of large (meters to decameters)-offset ultracataclastic fault zones. Microstructural analyses of the cataclastic...

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We present results from a study of the distribution of deformation bands and larger ultracataclastic faults in a high-porosity sandstone reservoir outcrop analogue. We show that tectonic loading path and the nature of the stress changes causing deformation may strongly influence strain distribution. Localisation of deformation onto a smaller...

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Compactive shear bands with different ratio of compactive to shear inelastic deformation were recently studied in detail in different regions within the porous rocks. Among them are nicely exposed networks of conjugate cataclastic bands formed in a single tectonic event in the "Bassin du Sud-Est" (Provence, France) in Cretaceous sandstones....