Figure F12. Na8-Fe8 diagram showing the trend of the global array after Klein and Langmuir (1987). Solid and dashed lines separate Indian Ocean MORB mantle (IMM) from Pacific Ocean MORB mantle (PMM) fields for near-axis (0-7 Ma) and Leg 187 lavas, respectively. TMM = transitional MORB mantle.

Figure F12. Na8-Fe8 diagram showing the trend of the global array after Klein and Langmuir (1987). Solid and dashed lines separate Indian Ocean MORB mantle (IMM) from Pacific Ocean MORB mantle (PMM) fields for near-axis (0-7 Ma) and Leg 187 lavas, respectively. TMM = transitional MORB mantle.