Fig. 4
From: Thermal buffering-controlled temperature variation between Mg–Al-rich rocks and migmatites
P–T pseudosection for samples (a) Mg–Al-rich metapelite − 830-4, and (b) Migmatitic rock − 830 − 16. The black, bold outline represents the inferred peak field, and the orange arrow represents the interpreted P–T path. Peak fields are magnified in the inset for each diagram. The kyanite-sillimanite phase transformation is indicated with a wide dashed white line, sapphirine-in by a narrow dashed white line, and the solidus by a dashed black line. Sapphirine-in is indicated in 830-4 by a narrow dashed white line. Variance increases with shading in each diagram. Bulk composition used for the calculation of phase diagrams is given at the top of each model in mol%. Abbreviations: bi = biotite, cd = cordierite, cor = corundum, gt = garnet, hb = hornblende, ilm = ilmenite, kfs = K-feldspar, ky = kyanite, melt = melt, mt = magnetite, opx = orthopyroxene, pl = plagioclase, q = quartz, ru = rutile, sa = sapphirine, sill = sillimanite, sp = spinel. Preliminary diagrams are provided in Supplementary Figures S2 and S3.
