Abstract Whiteschists from the Monte Rosa Nappe were examined in field as well with petrographic, geochemical, and isotopic methods to constrain controversial origin of these rocks their Alpine metamorphic context. occur ellipsoidal-shaped, decametric-sized bodies, within a Permian metagranite, consist mainly chloritoid, talc, phengite, quartz. The transition whiteschist metagranite is marked b...

The Kamieniec Metamorphic Belt belongs to the Variscan of Europe as NE part Bohemian Massif. It comprises a supracrustal succession dominated by micaschists that has not been yet recognized high-P, low-T (HP–LT) metamorphic unit. Our work demonstrates significance metapelites in study HP metamorphism To reconstruct P–T history Belt, we have investigated three samples using independent geothermo...

Unravelling the timing and rate of subduction-zone metamorphism H2O release requires linking time to compositional changes petrogenetic indicator minerals in blueschists eclogites. Garnet is a key mineral this regard, as it forms by, records, H2O-releasing reactions that can be linked pressure temperature conditions. These placed using chronology. Bulk-or multi-grain ages are norm garnet While ...

The geochemistry of metamorphic quartz vein formation in Barrow’s index mineral zones north of Stonehaven, Scotland, was investigated in order to assess regional fluid flow and mass transfer. Metamorphic grade in the Dalradian metasediments increases to the north–northwest away from the Highland Boundary Fault (HBF) and associated ophiolitic rocks of the Highland Border Complex (HBC), passing t...

Study of the concentration and isotopic composition of strontium and rubidium in hornblende diorite dikes and sills of Precambrian age from the Panamint Mountains of California showed that these rock systems were enriched in radiogenic Sr during a late Mesozoic metamorphism. Enrichments in radiogenic Sr were observed for total-rock samples which yielded apparent ages of up to 34,000 m.y., altho...