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Geochemistry

Seeing through tectonic plates

Two overlapping oceanic plates are sinking into the mantle underneath central Japan where they dehydrate, releasing water-rich fluids that enhance mantle melting. Geochemical work helps determine the relative contribution of each plate to the overall fluid budget.

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Figure 1: Dehydration and melting in a subduction zone.

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Churikova, T. Seeing through tectonic plates. Nature Geosci 1, 350–351 (2008). https://doi.org/10.1038/ngeo215

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