METAMORPHIC HISTORY OF SAPPHIRINE-BEARING AND RELATED MAGNESIAN GNEISSES FROM NAMAQUALAND, SOUTH-AFRICA

Sapphirine occurs with cordierite, phlogopite, spinel, sillimanite, corundum, orthopyroxene, and gedrite in granulite facies Mg- and Al-rich paragneisses within the low P, high T Namaqualand Metamorphic Complex. The gneisses reveal a three-stage textural history. Sapphirine appeared during a second...