Figure F10. A. Al2O3 vs. SiO2/MgO for serpentinite muds and metamorphic clasts from Legs 125 and 195. There exists a clear distinction between the serpentinite muds and the metamorphic schists with ultramafic protoliths (with Al2O3 < 3 wt% and Si/Mg ~1), and the schists with MORB-like protoliths (with Al2O3 > 3 wt% and Si/Mg > 1). There is also a positive correlation between the Al2O3 and Si/Mg ratio for the Leg 125 metabasalts (Johnson, 1992) and the MORB-like schists from Leg 195. The shaded field is for serpentinized peridotites (Savov, 2004). Note that the scale for Al2O3 is logarithmic. B. CaO vs. SiO2/MgO for serpentinite muds and metamorphic clasts from Legs 125 and 195. The serpentinite muds are clearly different from the metamorphic schists in that they have low Si/Mg (~1). The MORB samples from Leg 125 (Johnson, 1992) and the metabasic schists from Leg 195 have Ca > 3 wt% and Si/Mg >1. C. TiO2 vs. SiO2/MgO for serpentinite muds and metamorphic clasts from Legs 125 and 195. As in Figure F5A, the schists with basaltic protolith have high TiO2 (1 wt%) and Si/Mg > 1. They also show positive TiO2-SiO2/MgO correlation. Note that the scale for TiO2 is logarithmic. Symbols are the same as in A.

Figure F10. A. Al₂O₃ vs. SiO₂/MgO for serpentinite muds and metamorphic clasts from Legs 125 and 195. There exists a clear distinction between the serpentinite muds and the metamorphic schists with ultramafic protoliths (with Al₂O₃< 3 wt%and Si/Mg ~1), and the schists with MORB-like protoliths (with Al₂O₃ > 3 wt% and Si/Mg > 1). There is also a positive correlation between the Al₂O₃and Si/Mg ratio for the Leg 125 metabasalts (Johnson, 1992) and the MORB-like schists from Leg 195. The shaded field is for serpentinized peridotites (Savov, 2004). Note that the scale for Al₂O₃ is logarithmic. B. CaO vs. SiO₂/MgO for serpentinite muds and metamorphic clasts from Legs 125 and 195. The serpentinite muds are clearly different from the metamorphic schists in that they have low Si/Mg (~1). The MORB samples from Leg 125 (Johnson, 1992) and the metabasic schists from Leg 195 have Ca > 3 wt% and Si/Mg >1. C. TiO₂ vs. SiO₂/MgO for serpentinite muds and metamorphic clasts from Legs 125 and 195. As in Figure F5A, the schists with basaltic protolith have high TiO₂ (1 wt%) and Si/Mg > 1. They also show positive TiO₂-SiO₂/MgO correlation. Note that the scale for TiO₂is logarithmic. Symbols are the same as in A.