Figure F80. Scanned image of thin section showing mylonitic gabbroic/pyroxenitic veins. The mylonitization of the vein material had little effect on adjacent harzburgite enclaves, except along contacts between the enclaves and mylonite zones. Brown patches associated with the mylonitized veins are brown amphiboles, which replace clinopyroxene in the vein and at the edge of the mylonitized zones (upper left). Orthopyroxene and olivine from harzburgite along the edge of the vein are commonly entrained within the mylonite as porphyroclasts (see orthopyroxene [opx] example in lower right) (Sample 209-1270C-1R-1 [Piece 13, 83

Figure F80. Scanned image of thin section showing mylonitic gabbroic/pyroxenitic veins. The mylonitization of the vein material had little effect on adjacent harzburgite enclaves, except along contacts between the enclaves and mylonite zones. Brown patches associated with the mylonitized veins are brown amphiboles, which replace clinopyroxene in the vein and at the edge of the mylonitized zones (upper left). Orthopyroxene and olivine from harzburgite along the edge of the vein are commonly entrained within the mylonite as porphyroclasts (see orthopyroxene [opx] example in lower right) (Sample 209-1270C-1R-1 [Piece 13, 83–85 cm]).