Abstract
Three reactions involving Mg-chlorite-muscovite and quartz were studied between 5 and 10 kilobars water pressure over a temperature range of 600–700 °C using mixtures of synthetic clinochlore, muscovite and quartz as starting materials. Three reactions were reversed in this system. 3 chlorite+5 muscovite + 8 kyanite + 5 phlogopite + 1 quartz + 12 H2O was reversed between 639.5±5.3 °C and 531.8±5.1 °C at 7.24 kb and between 645.9±5.7 °C and634.1±6.0°C at8.27kb.