The Scandinavian Caledonides comprise nappe stacks of far-travelled allochthons that record closure the Iapetus Ocean and subsequent continental collision Baltica Laurentia. Seve Nappe Complex (SNC) includes relics outermost Baltoscandian passive margin were subducted to mantle depths. earliest deep subduction events has been dated ca. 500–480 Ma. Evidence this event reported from northern expo...

Abstract We report the first findings of several occurrences lawsonite and metamorphic aragonite in meta-sediments from Combin Zone (Piemonte–Liguria ocean, Western Alps), where early blueschist-facies episode is poorly documented. New field data (thermodynamic modelling Raman spectroscopy on carbonaceous material) are used to elucidate P–T evolution fluid composition investigate growth breakdo...