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

Fig. 5

From: Formation of phyllosilicates in a fault zone affecting deeply buried arkosic sandstones: their influence on petrophysic properties (Annot sandstones, French external Alps)

Fig. 5

Petrophysic data and mineralogical composition along the studied profile across the Restefond fault zone. a Mineralogical content obtained by point counting analyses (cf Table 1). 1 Macropores, 2 fresh feldspars, 3 calcite cement, 4 quartz veins, 5 newly-formed phyllosilicates and matrix enriched in phyllosilicates, 6 altered feldspars, 7 detrital phyllosilicates, 8 detrital quartz, 9 polygenic fragments. b Total porosity (Nt). c Permeability values (K) in mD. Core orientation green: horizontal and parallel to the fault; blue: horizontal and perpendicular to the fault; red: vertical

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