Figure F9. A. MgO vs. SiO2 for serpentinite muds and metamorphic clasts from Legs 125 and 195. The shaded field is for serpentinized peridotites (Savov, 2004). Note how the metamorphic rocks with ultramafic protolith overlap the field with the Leg 195 serpentinite muds and how the metabasic clasts with MORB-like protolith have low MgO. B. SiO2 vs. CaO for serpentinite muds and metamorphic clasts from ODP Legs 125 and 195. The shaded field is for serpentinized peridotites (Savov, 2004). Note the similarity of the Leg 195 metamorphic schists and the metabasalts recovered from Leg 125 (Johnson, 1992). The metamorphic schists also show consistently high CaO (>3 wt%). C. Al2O3 vs. TiO2 for serpentinite muds and metamorphic clasts from Legs 125 and 195. The positive correlation between the Al2O3 and TiO2 observed in the serpentinite muds (Fig. F7A) seems to be linked to similar relationship in the metabasic rocks. Note that the scale for TiO2 is logarithmic. Symbols are the same as in A.

Figure F9. A. MgO vs. SiO₂ for serpentinite muds and metamorphic clasts from Legs 125 and 195. The shaded field is for serpentinized peridotites (Savov, 2004). Note how the metamorphic rocks with ultramafic protolith overlap the field with the Leg 195 serpentinite muds and how the metabasic clasts with MORB-like protolith have low MgO. B. SiO₂ vs. CaO for serpentinite muds and metamorphic clasts from ODP Legs 125 and 195. The shaded field is for serpentinized peridotites (Savov, 2004). Note the similarity of the Leg 195 metamorphic schists and the metabasalts recovered from Leg 125 (Johnson, 1992). The metamorphic schists also show consistently high CaO (>3 wt%). C. Al₂O₃ vs. TiO₂ for serpentinite muds and metamorphic clasts from Legs 125 and 195. The positive correlation between the Al₂O₃and TiO₂ observed in the serpentinite muds (Fig. F7A) seems to be linked to similar relationship in the metabasic rocks. Note that the scale for TiO₂ is logarithmic. Symbols are the same as in A.