Formation of corundum in direct contact with quartz and biotite in clockwise <i>P–T</i> trajectory from the Sør Rondane Mountains, East Antarctica

We have found corundum in direct contact with quartz and biotite as inclusions garnet the pelitic gneisses of northern Austkampane Northeastern (NE) Terrane Sør Rondane Mountains (SRM), East Antarctica. Our samples, which include corundum–bearing gneisses, show petrographic features such staurolite garnet, compositional zoning orthoamphibole Al decreasing toward rims, late–stage cordierite formation, these are characteristic a clockwise P–T trajectory. The observations consistent proposed regional evolution NE SRM. other observed porphyroblasts interpreted to formed owing either breakdown or metastable crystallization relative kyanite prior peak metamorphism. close association surrounding suggests fluid– melt–related processes. These imply that (rarely high–grade metamorphic rocks) result during prograde stage continental collision zone.