The lower mantle can be oxidized in the presence of water

Beijing, China (SPX) Mar 5, 2020
If we took a journey from Earth’s surface to the center, the midway point locates roughly at 1900 km depth in the lower mantle. The lower mantle ranges from 660 to 2900 km depth and occupies 55% of our planet by volume. The chemical composition of the lower mantle is rather simple. It has long been pictured as being made up of 2 major minerals (~95%), namely bridgmanite and ferropericlase. Until
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