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Fig. 11 | Swiss Journal of Geosciences

Fig. 11

From: Structural and metamorphic evolution of a subducted passive margin: insights from the Briançonnais nappes of the Western Alps (Ubaye–Maira valleys, France–Italy)

Fig. 11

Deformation features at the microscale. a S3 disjunctive foliation developed in the Aiguille de Mary unit metandesite associated to growth of chlorite and white mica (sample DT17); b S3 disjunctive foliation in the Combe-Brémond Upper Jurassic marble (sample DT30); c S3 continous fine foliation developed in Combe-Brémond Upper Cretaceous marble (sample DT13); d Feldspar porphyroclast enveloped by S2 foliation in the Aiguilles de Mary metandesite. This foliation is associated with the growth of white mica and chlorite (sample DT18); e F2 folds in the sample of Fig. 10d; the S2 crenulation cleavage is parallel to the axial plane of the folds that deform the previous S1 foliation (sample DT18); f Quartz-carpholite composite vein, in the Roure unit; note how the quartz is affected by bulging after the carpholite grow (sample DT16); g Plagioclase crystal approximately parallel to the fine S3 foliation of a “Série de la Bergerie de l’Alpet” marble; note also the development of grain boundary migration (GBM) in calcite (sample DT33); h Selective S3 foliation developed in a Permian quartz-schist and subsequently deformed by D4 folds associated with a S4 spaced cleavage (sample DT23)

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