Metamorphic mineral assemblages and microstructures characterising the lamprophyres of Valscura and Val du Haut Boréon: a: granoblastic aggregates of EpM1 + ChlM1 pervasively overgrew igneous crystals in melanocratic spessartite, Val du Haut Boréon; b: mineralised tensional vein filled by elongated crystals of AbM2, ActM2, and KfsM2 in spessartite, Valscura. ActM2 grew in continuity with truncated phenocrysts of AmpI1 already replaced by M1 mineral assemblages; c: stylolitic foliation, supported by fine-grained crystals of TtnM2, which define the contact between a phenocryst of AmpI1 partially replaced by M1 mineral assemblages (at top) and an aggregate of EpM1 (at bottom) in spessartite, Valscura. Stylolitic foliation is cinematically compatible with the opening of mineralised tensional veins in Figure 11c; d: spessartite containing a porphyroclast of AmpI1 largely pseudomorphosed by M1 mineral assemblages and wrapped by D4 foliation, Valscura; pressure shadow domains are filled by BtM2, ChlM2 and minor ActM2 at the edges of the AmpI1 porphyroclast; e: aggregates of EpM1 and small phenocrysts of AmpI1 wrapped by D4 foliation in a heterogeneously deformed spessartite dyke, Val du Haut Boréon. Trails of TtnM2 and laminae of BtM2 and ChlM2 are the mineralogical support of D4 S-C surfaces; f: Micro-boudins of AmpI1 in a foliated spessartite dyke, Val du Haut Boréon. Boudin necks are filled by ActM2 and ChlM2; the foliation is mostly defined by trails of fine-grained TtnM2, and minor BtM2 and ChlM2. All pictures are taken by plane polarised light.