In the Western Gneiss Region in Norway, mafic eclogites form lenses within granitoid orthogneiss and contain the best record of the pressure and temperature evolution of this ultrahigh-pressure (UHP) terrane. Their exhumation from the UHP conditions has been extensively studied, but their prograde evolution has been rarely quantified although it re...
Published in Petrology
bstractThe mineral zoning of corundum-bearing rocks of the Belomorian mobile belt, whose genesis remains controversial, has been studied at one of the typical occurrences: Khitoostrov. Based on the estimates of the P–T parameters of the formation of corundum-bearing rocks by the multiequilibrium thermobarometry method, pseudosections were construct...
Published in American Mineralogist
The Egéré terrane (Central Hoggar, South Algeria) includes mafic eclogite lenses boudinaged in metapelitic rocks with high-pressure relicts. These metapelites show textural records of partial melting, mainly primary melt inclusions enclosed in garnet crystals and later crystallized as “nanogranitoids.” Garnet porphyroblasts also contain inclusions ...
The Variscan metamorphism in the Pyrenees is dominantly of the low-pressure-high-temperature (LP-HT) type. The relics of an earlier, Barrovian-type, metamorphism that could be related to orogenic crustal thickening are unclear and insufficiently constrained. A microstructural and petrological study of micaschists underlying an Ordovician augen orth...
Dans les Pyrénées, le métamorphisme hercynien dominant estde type haute température (HT) et basse pression (BP). Ce typede métamorphisme est présent partout dans le reste de la chaînehercynienne, mais il est généralement tardif et précédé par unmétamorphisme de plus haute pression, typiquement barrovien.Dans les Pyrénées, les évidences d’un métamor...
Garnet-chloritoid-bearing micaschists from the Gran Paradiso massif (Western Alps) contain evidence of a polymetamorphic evolution. Detailed textural observations reveal that two stages of garnet growth are present in the micaschists, interpreted as: (i) relics of an early metamorphism of pre-Alpine age and (ii) newly grown Alpine garnet, respectiv...
