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Ocean island basalts (OIBs) possess uniformly low B contents, and lower B/Nb and B/K 2 O ratios than mid-ocean ridge basalts (MORBs). While B is depleted in OIBs relative to either MORBs or arc lavas, OIB samples representing EM and HIMU isotopic reservoirs, often ascribed to the effects of ancient subducted materials, cannot be distinguished from other OIBs in terms of B abundances or B...
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