Citation: K. Ouzegane et S. Boumaza, AN EXAMPLE OF ULTRAHIGH-TEMPERATURE METAMORPHISM - ORTHO-PYROXENE-SILLIMANITE-GARNET, SAPPHIRINE-QUARTZ AND SPINEL-QUARTZ PARAGENESES IN AL-MG GRANULITES FROM IN HIHAOU, IN OUZZAL, HOGGAR, Journal of metamorphic geology, 14(6), 1996, pp. 693-708