Osumilite and a spinel + quartz association in garnet-sillimanite gneiss from RundvÃ¥gshetta, Lützow-Holm Complex, East Antarctica

►We report for the first time osumilite occurring as fine isolated inclusions within garnet porphyroblasts in a granulite-facies rock from RundvÃ¥gshetta, Lützow-Holm Complex, East Antarctica. ►We also report a spinel + quartz association found as inclusions within garnet porphyroblasts. ►The occurrence of osumilite and spinel + quartz in this rock indicates ultrahigh-temperature conditions and exhumation along a clockwise pressure-temperature path.