Mineralogy of the Deep Mantle - The Post-Perovskite Phase and its Geophysical Significance

K. Hirose, R. Wentzcovitch, D. A. Yuen, T. Lay

Research output: Chapter in Book/Report/Conference proceedingChapter

13 Scopus citations

Abstract

The phase equilibria, structures, and properties of a high-pressure polymorph of silicate perovskite, called post-perovskite, are discussed. This phase was discovered in 2004 and provides a viable candidate for a deep mantle phase transition in the primary lower mantle mineral, silicate perovskite. Post-perovskite may exist in regions of the lowermost mantle at temperatures below about 3,000. K, and the phase transition from perovskite to post-perovskite may explain observations of a velocity discontinuity in seismic S waves and relatively strong anisotropy of the lower most mantle D" region. The phase transition has important dynamical consequences for heat transport and boundary layer instabilities.

Original languageEnglish (US)
Title of host publicationMineral Physics
PublisherElsevier Inc.
Pages85-115
Number of pages31
Volume2
ISBN (Electronic)9780444538031
ISBN (Print)9780444538024
DOIs
StatePublished - Jan 1 2015

Keywords

  • Boundary layer instabilities
  • Core-mantle boundary
  • Core-mantle heat flux
  • D" discontinuity
  • D" region
  • Lower mantle
  • Perovskite
  • Phase transition
  • Post-perovskite

Fingerprint Dive into the research topics of 'Mineralogy of the Deep Mantle - The Post-Perovskite Phase and its Geophysical Significance'. Together they form a unique fingerprint.

  • Cite this

    Hirose, K., Wentzcovitch, R., Yuen, D. A., & Lay, T. (2015). Mineralogy of the Deep Mantle - The Post-Perovskite Phase and its Geophysical Significance. In Mineral Physics (Vol. 2, pp. 85-115). Elsevier Inc.. https://doi.org/10.1016/B978-0-444-53802-4.00054-3