Accretion of the Earth and segregation of its core

Article Abstract:

An estimated 30-40 million years were spent for the accretion of the Earth from smaller 'planetesimals', many of which had metallic iron cores. The core forming process took place under high pressure that led to the Earth's core being richer in low-atomic-number elements, especially silicon and oxygen, than the cores of the smaller planetesimal blocks.

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Experimental evidence for the existence of iron-rich metal in the earth's lower mantle

Article Abstract:

The lower mantle of the Earth is likely to consist approximately 1wt percent of a metallic iron-rich alloy. It is believed that the presence of this alloy has a lot of influence over the mantle's oxidation state and siderophile element budget.

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Putting the sqeeze on oxidation

Article Abstract:

The results of the experiments conducted on the earth's lower mantle are presented. As the lower mantle constitutes a large volume of earth, even a small amount of metallic iron represents several percent of metallic iron in the planet.

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