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We model the dynamics and melting of a ridge-centered mantle plume, and predict the geochemical composition of magma at the surface. The mantle source is a fine-scale mixture of a small fraction of hydrous peridotite that is relatively enriched in incompatible elements (“EC”) and is embedded in a drier peridotite (“DC”) matrix. We assume all magma erupts at the ridge and calculate the contribution...
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