Fig. 7. Mineral compositions of (a) garnet and (b) clinopyroxene.
Similar to the olivine, orthopyroxene occurs as three types: inclusions in coarse-grained garnet (Opx1; Fig. 4c and i); coarse-grained porphyroblasts (Opx2; Fig. 4e and h); and fine-grained matrix (Opx3; Fig. 4h–l). The orthopyroxene inclusions have higher MgO (29.30–29.69 wt.%), lower FeO (10.93–13.38 wt.%), and variable Al2O3(1.36–4.57 wt.%) contents as compared with the other types. MgO contents are slightly lower (28.22–29.04 and 27.67–28.37 wt.%, respectively) and FeO contents are slightly higher (12.24–13.74 and 12.75–13.95 wt.%, respectively) in the coarse-grained orthopyroxene porphyroblasts and fine-grained matrix (Fig. 8a–b).