A doubling of the post-perovskite phase boundary and structure of the Earth's lowermost mantle

John W. Hernlund (), Christine Thomas and Paul J. Tackley
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John W. Hernlund: Department of Earth and Space Sciences
Christine Thomas: University of Liverpool
Paul J. Tackley: Department of Earth and Space Sciences

Nature, 2005, vol. 434, issue 7035, 882-886

Abstract: Modelling the Earth's mantle A new model of the deep Earth allows geophysicists to measure variations in Earth's temperature near the boundary between the rocky mantle and core. Using a recently discovered phase change in the lowest part of the Earth's mantle, where atoms rearrange themselves in crystals under extreme pressure and temperature, the model also explains odd features of this part of the mantle, such as patchy regions that reflect seismic waves generated by large earthquakes and inferences of dense partial melting. Combined with observations, the results imply very large variations in temperature, providing further evidence for circulation of material throughout the Earth's mantle.

Date: 2005
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DOI: 10.1038/nature03472

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