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Swiss Journal of Geosciences
Fig. 12 | Swiss Journal of Geosciences

Fig. 12

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

Fig. 12

EDX point data of microstructures including calcite mineralization. a, b Calcite slickensides show distinct group of compositions with higher Fe and Mg values than calcite in other tension gash fillings. TG: tension gash. Data included from the following samples: BOZ2_1_527.87, BOZ2_1_530.16, BOZ2_1_548.59, BOZ2_1_541.82, STA3_1_830.87, BOZ1_1_544.69, BOZ2_1_531.77, BOZ1_1_613.58. c–f Local microstructural analyses of sample BOZ2_1_531.77 and sample BOZ1_1_544.69 show similar groups of: calcite slickensides on thrust faults with higher Mg and Fe values compared to fibrous calcite veins directly adjacent to the slickensides

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