Figure 10. ²⁰⁸Pb/²⁰⁴Pb vs. ²⁰⁶Pb/²⁰⁴Pb showing measured data points for basalts recovered from the Kerguelen Plateau and Broken Ridge. S hown for comparison are measured fields for SEIR MORB (two subfields: the field extending to high ratios includes samples near the Amsterdam-St Paul platform), lavas from St. Paul and A msterdam Islands (diagonal line), and initial ratios for lavas from the Kerguelen Archipelago (sh aded area) and the Ninetyeast Ridge. Data sources are as in Figure 7.

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