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Sapphirine bearing granulites from Gruf Compex, Penninic Domain, index of U.H.T. – “Ultra High Temperature” metamorphism in central (italian Rethic) Alps.These granulites (type A of Galli et al. 2011) are rare, dark, heavy and massive rocks normally occurred as relict enclaves in migmatitic orthogneisses and charnockites and represent restitic melanocratic refractory product as residue compliments…

Sapphirine bearing granulites from Gruf Compex, Penninic Domain, index of U.H.T. – “Ultra High Temperature” metamorphism in central (italian Rethic) Alps.These granulites (type A of Galli et al. 2011) are rare, dark, heavy and massive rocks normally occurred as relict enclaves in migmatitic orthogneisses and charnockites and represent restitic melanocratic refractory product as residue compliments originating through melt extraction from prepermian metapelitic sediments showing mineral assemblage made of orthopyroxene (honey light-brown), sapphirine (blue), biotite (dark brown), garnet (pink with opx–cordierite symplectites inside), quartz (colourless), feldspar (grey). Stereomicroscope photo (horizontal FOV 6mm approx) of a sample from a detrital (not in situ) discovery on Punta di Bresciadega slopes, Alpe Coeder, medium Codera valley, Chiavenna valley, Rethic Alps, Lombardy, Italy. (Selfcollected)

(Photo by Lorusso Angelo)