Figure 6.10. GASP Reaction. Equilibrium line for the grossular (Grs) + kyanite (Ky) + quartz (Qz) = anorthite (An) based on the experiments of Koziol and Newton (1988) and extended to lower T-P conditions using equation (15-48) of Spear (1993) and K_eq of 1. This end member reaction can be used as a geobarometer by correcting the equilibrium constant for the compositions of the garnet and of the plagioclase.

   Return to previous view