Syros Island, Cyclades complex, central Aegean Sea, Greece, is a prime locality for the study of processes active in deep levels orogens and world famous its exceptionally well preserved glaucophane schist-to eclogite-facies lithologies. Glaucophane schists eclogites are witnesses one fundamental tectonic operating on planet Earth. Results geological research have contributed lot to our present...

Sodic amphiboles in high pressure and ultrahigh pressure (UHP) metamorphic rocks are complex solid solutions in the system Na2O±MgO±Al2O3±SiO2± H2O (NMASH) whose compositions vary with pressure and temperature. We conducted piston-cylinder experiments at 20±30 kbar and 700±800 °C to investigate the stability and compositional variations of sodic amphiboles, based on the reaction glaucophane ˆ 2...