Figure F20. A core photograph of a deformed oxide gabbro seam in Section 176-735B-149R-3 (left) that produced a strong spike in magnetic susceptibility (right). The deformation intensity is strongest (grade 4; mylonitic) just at the peak in intensity of magnetic susceptibility. The contrast of the photograph is somewhat enhanced to reveal the presence of a deformed felsic vein between 52 and 55 cm in the section and felsic veinlets in the deformed troctolite (lithologic interval 718) just above the oxide-gabbro mylonite. The latter was not identified as a separate lithologic interval in the core descriptions. The inset is a scanned image of a slab sample of this portion of the section. In the plot on the right, background measurements are the flat parts of the curve on its left.

Figure F20. A core photograph of a deformed oxide gabbro seam in Section 176-735B-149R-3 (left) that produced a strong spike in magnetic susceptibility (right). The deformation intensity is strongest (grade 4; mylonitic) just at the peak in intensity of magnetic susceptibility. The contrast of the photograph is somewhat enhanced to reveal the presence of a deformed felsic vein between 52 and 55 cm in the section and felsic veinlets in the deformed troctolite (lithologic interval 718) just above the oxide-gabbro mylonite. The latter was not identified as a separate lithologic interval in the core descriptions. The inset is a scanned image of a slab sample of this portion of the section. In the plot on the right, background measurements are the flat parts of the curve on its left.