Figure F5. Isotopic compositions highlight the complex variations in lava chemistry following subduction initiation. A complete stratigraphy will enable better interpretation of these data in terms of variations in mantle sources and subduction components following subduction initiation. Data from Ishizuka et al. (2006, 2011). HMA = high-Mg andesites, KPR = Kyushu-Palau Ridge, MORB = mid-ocean-ridge basalt, NHRL = Northern Hemisphere reference line.
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