Combined phase diagram modelling and quartz?in?garnet barometry of <i>HP</i> metapelites from the Kamieniec Metamorphic Belt (NE Bohemian Massif)

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 geothermobarometric techniques including phase diagram modelling, Si4+ content white mica and quartz-in-garnet elastic barometry. Two contain mineral assemblages bearing record followed an LP event. oldest assemblage is mostly preserved first generation garnet it phengitic rutile. In one samples, also chloritoid inferred pseudomorphs after lawsonite composed quartz, clinozoisite associated with margarite. third strongly retrogressed only contains relics mica. All younger comprising low ilmenite. Mineral equilibria modelling indicates conditions event culminated at ~15.5–18 kbar ~470–570?, while episode occurred ~5–7 ~530–570?. Raman shift measured quartz inclusions well-preserved stage points their entrapment pressures between 11 16 kbar. within micaschist sample exhibit shifts corresponding ~5–8 Discrepant results obtained for are discussed detail. investigations show HP–LT typical subduction systems. A recently established tectonic model crystalline complexes exposed Massif suggests they were formed via collision Saxothuringian, Teplá–Barrandian, Brunovistulian domains. Therefore, interpret representing fragments Saxothuringian crust experienced cold extrusion from below Teplá–Barrandian domain front rigid indenter.