Figure F64. Downhole variation of Mg# from 500 to 1508 mbsf in Hole 735B drilled during Leg 176. Samples are subdivided mainly on the basis of TiO₂. Filled diamonds = troctolite, troctolitic gabbro, and olivine gabbro having <0.4 wt% TiO₂; half-filled diamonds = gabbro, gabbronorite, and disseminated oxide gabbro having between 0.4 and 1.0 wt% TiO₂; open diamonds = oxide gabbro with more than 1.0 wt% TiO₂; half-filled squares = felsic samples or hybrid samples with a significant felsic component; half-filled circle = strongly altered. Sample 176-735B-91R-3, 92-100 cm.