Sun, Weidong; Hu, Yanhua (Y. H.); Kamenetsky, Vadim S; Eggins, Stephen; Chen, Ming; Arculus, Richard
It has long been proposed that MORB and OIB have constant supra-primitive mantle (PM) Nb/U values identical to each other. This fact together with complementary sub-PM values for the continental crust (CC), are taken as fundamental evidence, linking the mantle sources of MORB and OIB to the formation of the CC. Given that plate subduction at convergent margins is the major known process that dramatically fractionates Nb from U, and consequently that subducted oceanic slabs are the main primary...[Show more]
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