Figure F21. A narrow mylonite/ultramylonite zone in interval 176-735B-107R-1, 20-30 cm. The unrolled image of the whole-round core and a core photograph of the split surface of the rock are on the left. Contrast in both is somewhat enhanced to heighten detail. Two small blow-ups of portions of the core photograph show details of the mylonite zone and the coarse, nearly pegmatitic olivine gabbro just below it. There are felsic streaks in the mylonite, the base of which corresponds to a small increase in magnetic susceptibility (plot at right). In the plot, background measurements are the flat parts of the curve on its left. Deformation intensities (DI) are indicated to the right.

Figure F21. A narrow mylonite/ultramylonite zone in interval 176-735B-107R-1, 20-30 cm. The unrolled image of the whole-round core and a core photograph of the split surface of the rock are on the left. Contrast in both is somewhat enhanced to heighten detail. Two small blow-ups of portions of the core photograph show details of the mylonite zone and the coarse, nearly pegmatitic olivine gabbro just below it. There are felsic streaks in the mylonite, the base of which corresponds to a small increase in magnetic susceptibility (plot at right). In the plot, background measurements are the flat parts of the curve on its left. Deformation intensities (DI) are indicated to the right.