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P–T pseudosection for the same bulk composition as Figure 5, except for a limited amount of H2O (see text for details). Note that the scale is different from Figure 5 and that the amount of H2O expressed as a molar proportion is equivalent to ∼1% of volume of the rock at 750 °C and 22.5 kbar. The diagram is contoured with modal isopleths for garnet (a) and clinopyroxene (c), and compositional isopleths for pyrope (a), grossular (b), almandine (c), and the aluminium content in amphibole (b). The blue-coloured field corresponds to the inferred M2 assemblage melt-amp-cpx-g-pl-ky-q-ru-mu/ksp. The inferred garnet resorption and crystallization sequence is shown as inset in (a).
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