The role of melting of oceanic crust within the subduction factory: A melt inclusion approach

大陆地壳最终是在俯冲带形成的，在那里，海洋地壳沿着深海海沟再循环回到地幔中，形成岛弧。人们对俯冲“工厂”中发生的过程知之甚少，但通常会援引旧俯冲海洋地壳的脱水来提供触发地幔融化和弧岩浆活动的水。越来越多的证据表明，在许多地方，俯冲的海洋地壳可能会融化，而不是简单地脱水。我将通过对熔体包裹体（岩浆中生长的晶体捕获的熔体液滴）的研究来验证这一点，并将更好地约束俯冲工厂的投入产出预算。

Continental crust is ultimately generated in subduction zones, where oceanic crust is recycled back into the mantle along deep ocean trenches, producing island arcs. Processes occurring in the subduction 'factory' are poorly understood, but dehydration of old subducted oceanic crust is usually invoked to provide water that triggers mantle melting and arc magmatism. Evidence is accumulating that in many locations the subducted oceanic crust may melt, rather than simply dehydrate. I will test this using studies of melt inclusions (droplets of melt trapped by crystals growing in the magma), and will better constrain the input-output budgets of the subduction factory.