gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1956.031.234.06 The section CaSiO3-MgSiO3-Al2O3 Segnit E. R. M.Sc., Ph.D. Department of Geology, University of Adelaide1

The greater part of this work was done whilst the author was a research student in the Dept. of Mineralogy and Petrology, University of Cambirdge.

 9 1956 31 234 255 264 Copyright © 1956, The Mineralogical Society 1956 Summary

Phase relationships in the section CaSiO3-MgSiO3-Al2O3 through the quaternary system CaO-MgO-Al2O3-SiO2 have been determined. The bearing of the results on the genesis of aluminous pyroxenes and associated minerals in metamorphic rocks is discussed.