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Earth science

Another energy source for the geodynamo

Magnesium is not usually considered to be a constituent of Earth's core, but its presence there has now been proposed to explain an ongoing enigma — the identity of the energy sources that drive our planet's magnetic field. See Letter p.387

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Figure 1: Possible processes at the boundary between Earth's liquid core and rocky mantle.


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Correspondence to Bruce Buffett.

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Buffett, B. Another energy source for the geodynamo. Nature 529, 288–289 (2016).

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