Page 235 - Microtectonics

7.7 · Crystallographically Determined Inclusion Patterns 225

Fig. 7.51. Two intergrown andalusite porphyroblasts in micaschist, with cleavage domes of graphite. The porphyroblasts are almost free of
inclusions, but graphite is a major constituent of the micaschist matrix. Some growth inclusions are visible in the porphyroblast. A weakly
developed re-entrant zone is visible at lower right. Menderes Massif, Turkey. Width of view 2.5 mm. PPL. (Photograph courtesy R. Hetzel)

Fig. 7.52. Biotite porphyroblast in biotite schist with inclusions of opaque minerals in two almost orthogonal directions; the straight NE-SW
ones are parallel to, and probably controlled by the crystal cleavage, whereas the curved NW-SE ones constitute S i (passive inclusions). The
centre of the crystal shows a clockwise rotation of about 25° with respect to S . Strain shadows are visible at the left and right hand side of
e
the biotite crystal where the matrix with opaque grains was apparently detached from the crystal (Sect. 6.3). Rioumajou, Pyrenees, Spain.
Width of view 4 mm. PPL