Figure 7. Normative projections of the olivine (ol), plagioclase (pl), diopside (di), quartz (q) basalt tetrahedron on the triangular diagrams (A) ol-pl-q and (B) ol-di-q. Shown are the analyzed flows sampled during Leg 152 (Sites 917 and 918) and Leg 163 (Sites 988, 989, and 990), excluding analyses with >5% loss on ignition. Calculation, projection, and abbreviations are as for Figure 6. The solid lines are the pyroxene, olivine, and plagioclase cotectics taken from Figure 6.