Figure F11. Major, minor, and trace element variation diagrams illustrating the contrasts between Pacific Ocean MORB mantle (PMM) and Indian Ocean MORB mantle (IMM) fields for near-axis (0–7 Ma) and Leg 187 glasses. Data from Pyle et al. (1992); D. Pyle and C.J. Russo (pers. comm., 2004). A. Major and minor elements. Solid line separates PMM from IMM fields for near-axis lavas only. Dashed line separates PMM from IMM fields for Leg 187 lavas, where a distinction can be made and where the field boundary differs from that for the near-axis population. TMM = transitional MORB mantle.

Figure F11. Major, minor, and trace element variation diagrams illustrating the contrasts between Pacific Ocean MORB mantle (PMM) and Indian Ocean MORB mantle (IMM) fields for near-axis (0-7 Ma) and Leg 187 glasses. Data from Pyle et al. (1992); D. Pyle and C.J. Russo (pers. comm., 2004). A. Major and minor elements. Solid line separates PMM from IMM fields for near-axis lavas only. Dashed line separates PMM from IMM fields for Leg 187 lavas, where a distinction can be made and where the field boundary differs from that for the near-axis population. TMM = transitional MORB mantle. B. Trace elements. Dividing lines as in part A.