Figure F4. V-Ti systematics (Shervais, 1982) for the lavas erupted following subduction initiation. Note that the earliest lavas to erupt following subduction initiation (the fore-arc basalt [FAB]) is distinct from mid-ocean-ridge basalt (MORB) and from later boninites. These are, however, isolated outcrops: Expedition 352 will provide the full stratigraphy. Data from Ishizuka et al. (2006, 2011).
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