Figure F54. MgO/SiO2 vs. Al2O3/SiO2 for Site 1274 peridotites. Site 1268, 1270, 1271, and 1272 peridotites are shown for comparison. Also shown for comparison are published data on ophiolitic and orogenic peridotites (Western Alps orogenic lherzolites and ophiolites [Bodinier, 1988; Rampone et al., 1996); Oman dunites and harzburgites [Godard et al., 2000]) and abyssal peridotites (Southwest Indian Ridge [SWIR] [Snow and Dick, 1995]; Mid-Atlantic Ridge [MAR] Site 920 [Casey, 1997]; East Pacific Rise [EPR] [Niu and Hekinian, 1997]; Izu-Bonin Mariana [IBM] [Parkinson and Pearce, 1998]).

Figure F54. MgO/SiO₂ vs. Al₂O₃/SiO₂ for Site 1274 peridotites. Site 1268, 1270, 1271, and 1272 peridotites are shown for comparison. Also shown for comparison are published data on ophiolitic and orogenic peridotites (Western Alps orogenic lherzolites and ophiolites [Bodinier, 1988; Rampone et al., 1996); Oman dunites and harzburgites [Godard et al., 2000]) and abyssal peridotites (Southwest Indian Ridge [SWIR] [Snow and Dick, 1995]; Mid-Atlantic Ridge [MAR] Site 920 [Casey, 1997]; East Pacific Rise [EPR] [Niu and Hekinian, 1997]; Izu-Bonin Mariana [IBM] [Parkinson and Pearce, 1998]).