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Swiss Journal of Geosciences
Fig. 5 | Swiss Journal of Geosciences

Fig. 5

From: Geochemical signature of paleofluids in microstructures from Main Fault in the Opalinus Clay of the Mont Terri rock laboratory, Switzerland

Fig. 5

a BIB-SEM micrograph showing a gouge (upper sample part) in contact with undeformed material (lower part) separated by an open void (=sampling artifact). Compared to undeformed material, the gouge has a smaller grain size, contains more rounded grains and yields higher fabric intensity. b Is a detail of the micrograph a picturing the gouge’s boundary to be a micrometer-thin shear zone of shears parallel to nanometer-sized clay particles. c, d High-resolution SEM micrographs of slickenside surfaces covered by clay particles having sizes of a few 10th of nanometers. c Oblique view of the same, and d top view

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