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Swiss Journal of Geosciences
Fig. 13 | Swiss Journal of Geosciences

Fig. 13

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

Fig. 13

XFM trace element maps. a-b Sr and Fe map of sample BOZ2_1_531.77. Concentration values according colour bar: dark colours for low concentration values, bright colours for high concentration values. The image displays calcite slickensides with relative high Sr and Fe values compared to the fibrous calcite veins (see confirmation by histograms in c–d). The calcite fibres do show homogeneous trace element concentrations (both Sr and Fe) along their growth direction. The micron-veinlets are displays as wiggly stripes cross cutting both slickensides and veins and appear in similar trace element concentrations compared to the slickensides

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