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Seismic Detection of Post-perovskite Inside the Earth

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The Earth's Heterogeneous Mantle

Part of the book series: Springer Geophysics ((SPRINGERGEOPHYS))

Abstract

Since 2004, we have known that perovskite, the most abundant mineral in the lower mantle , has the capacity to transform to a denser structure, post-perovskite, if subjected to sufficiently high temperature and pressure . But does post-perovskite exist inside the Earth? And if it does, do we have the resources to locate it seismically? In this chapter, we present an overview of what we know about the perovskite-to-post-perovskite phase transformation from mineral physics, and how this can be translated into seismic structure. In light of these constraints, we evaluate the current lines of evidence from global and regional seismology which have been used to indicate that post-perovskite is likely present in the deep mantle.

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Acknowledgments

The authors thank Nobuaki Fuji and Frédéric Deschamps for helpful comments which improved the manuscript. This work was partially funded by the DFG (German Research Foundation) on grant number TH1530/5-1 and the NWO (Dutch Science Foundation) on grant number NWO: VIDI 864.11.008.

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Authors and Affiliations

  1. Institut für Geophysik, Westfälische Wilhelms-Universität, Münster, Germany

    Laura Cobden & Christine Thomas

  2. Department of Earth Sciences, Utrecht University, Utrecht, The Netherlands

    Laura Cobden & Jeannot Trampert

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  1. Laura Cobden
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  2. Christine Thomas
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Correspondence to Laura Cobden .

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  1. Institute of Geophysics, ETH Zurich, Zurich, Switzerland

    Amir Khan

  2. Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan

    Frédéric Deschamps

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Cobden, L., Thomas, C., Trampert, J. (2015). Seismic Detection of Post-perovskite Inside the Earth. In: Khan, A., Deschamps, F. (eds) The Earth's Heterogeneous Mantle. Springer Geophysics. Springer, Cham. https://doi.org/10.1007/978-3-319-15627-9_13

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