Fig. 3
From: Thermal buffering-controlled temperature variation between Mg–Al-rich rocks and migmatites
Photomicrographs from samples 830-4, 830-6, 830-7, 830 − 16, 830 − 20, and 830 − 23. (a) 830-4: Fine-grained M2 sillimanite, orthopyroxene, and biotite pseudomorphing M1 cordierite. (b) 830-4: Abundant sillimanite inclusions inside garnet porphyroblasts partially replaced by sapphirine. (c) 830-6: M2 orthopyroxene coronas around M1 orthopyroxene, and fine-grained M2 orthopyroxene, sillimanite, ilmenite, magnetite, and biotite pseudomorphing M1 cordierite. (d) 830-6: M2 garnet enclosing M1 orthopyroxene. (e) 830-7: Cordierite–orthopyroxene symplectite around garnet. (f) 830-7: Intergrown ilmenite, sapphirine, biotite, and quartz inside cordierite. (g) 830 − 16: Garnet porphyroblasts inside a K-feldspar–plagioclase–quartz leucocratic lens. Biotite occurs in association with garnet. (h) 830 − 20: Quartz-plagioclase leucosome and garnet porphyroblasts wrapped by sillimanite–biotite–quartz–plagioclase–ilmenite foliation. (i) 830 − 23: Coarse-grained garnet porphyroblast partially replaced by plagioclase, hornblende, biotite, K-feldspar, ilmenite, and magnetite.
