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

Fig. 5

From: Tectonometamorphic history of the Gruf complex (Central Alps): exhumation of a granulite–migmatite complex with the Bergell pluton

Fig. 5

Field aspect of principal rock types in the Gruf complex. a Typical migmatitic structure of the biotite-orthogneiss (upper Val Codera, 763′251/128′963); b weakly foliated mafic enclaves intruded by leucocratic veins in the enclave-rich biotite-orthogneiss (upper Val Aurosina, 758′153/129′875); c leucocratic veins derived from the migmatitic orthogneiss (light-coloured, bottom left) intruding greenish websterite to gabbronorite (top, contact zone in upper Val Grosina, 758′643/127′405); d millimetre thick bands of leucocratic, quartzo-feldspatic granoblastic leucosome and melanocratic, biotite-sillimanite-garnet-rich melanosome in partially molten paragneiss and micaschist (upper Val Aurosina, 758′458/129′444); e decimetric, meta-ultramafic enclaves within migmatitic biotite-orthogneiss (loose block in Val Salubiasca, 759′479/124′986); f bands of pyroxenite and chromite within chlorite-spinel-enstatite-olivine fels crosscut by talc veins (upper Val Casnaggina, 760′342/129′718)

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