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Swiss Journal of Geosciences
Fig. 11 | Swiss Journal of Geosciences

Fig. 11

From: Microstructural characterization of natural fractures and faults in the Opalinus Clay: insights from a deep drilling campaign across central northern Switzerland

Fig. 11

Micron-veinlets (small white arrow) imaged with optical light microscopy (a, c, e) and identical positions imaged by CL microscopy (b, d, f). a, b Strike-slip fault, with dextral sense of shear. The calcite slickenfibres are overprinted by many wiggly micron-veinlets (sample BOZ1_1_619.65). c, d Thrust fault associated with a fibrous calcite vein. The slickensides on the fault plane are overprinted by wiggly calcite micron-veinlets (sample BOZ2_1_507.70). e, f Thrust fault with micron-veinlets sheared by slip planes in the matrix (sample BOZ2_1_482.70A)

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