gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1992.056.382.11 Short Communications Ba Partitioning and the Origin of Anorthoclase Megacrysts in Basalitic Rocks Guo J. F. Green T. H. O'Reilly S. Y. School of Earth Sciences, Macquarie University, Sydney, NSW 2109, Australia 3 1992 56 382 101 107 30 11 1990 11 7 1991 Copyright © 1992, The Mineralogical Society 1992 Ba partition coefficient anorthoclase basalt megacrysts