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Extreme redox variations in a superdeep diamond from a subducted slab - Nature

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Extreme redox variations in a superdeep diamond from a subducted slab - Nature

The introduction of volatile-rich subducting slabs to the mantle may locally generate large redox gradients, affecting phase stability, element partitioning and volatile speciation1. Here we investigate the redox conditions of the deep mantle recorded in inclusions in a diamond from Kankan, Guinea. Enstatite (former bridgmanite), ferropericlase and a uniquely Mg-rich olivine (Mg# 99.9) inclusion indicate formation in highly variable redox conditions near the 660 km seismic discontinuity.

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Extreme redox variations in a superdeep diamond from a subducted slab - Nature

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Extreme redox variations in a superdeep diamond from a subducted slab - Nature

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