.... The effects of diagenesis on the microfabric, pore size distribution, and porosity of Opalinus shale were measured by comparing the behavior of natural and reconstituted specimens. The parent material (Opalinus shale) was reconstituted through multiple grinding operations, sedimentation from a dispersed...

...H. TAUBALD; A. BAUER; T. SCHÄFER; H. GECKEIS; M. SATIR; J. I. KIM Abstract The alteration and transformation behaviour of the Tertiary Hammerschmiede Smectite and the Jurassic Opalinus Shale in an alkaline solution was studied in column experiments. The Hammerschmiede Smectite is proposed...

... a relatively weak alignment of clay minerals and a random distribution for calcite. Opalinus shales from Benken and Mont Terri show strong alignment of illite-smectite, kaolinite, chlorite, and calcite. This intrinsic contribution to anisotropy is consistent with macroscopic physical properties where...

... on the Opalinus Shale and the Hammerschmiede Smectite J.-F. Alcover, Y. Qi, M. Al-Mukhtar, S. Bonnamy and F. Bergaya. Hydromechanical effects: (I) on the Na-smectite microtexture M. Al-Mukhtar, Y. Qi, J.-F. Alcover, J. Conard and F. Bergaya. Hydromechanical effects: (II) on the water-Na-smectite system...

...Figure 1. The PMMA, Berea sandstone, Bentheim sandstone, and Opalinus shale samples. Standard samples, 60 mm long, were used for experimental measurements first; then, thin-disc samples 15 mm long were cut out of the standard plugs. The Opalinus shale sample shown in the figure is before cutting. ...

... fragments) were observed, and, in some cases, pyrite grains were contained within calcite ( Fig. 8c ). Analcime–wairakite crystals were not identified. The clay mineralogies of the reacted Wyoming bentonite and Opalinus Clay fractions were also characterized. Discrete Opalinus Clay shale fragments (~1–5...