Elasticity of Fe- and Al-bearing and --free MgSiO$_{3}$-perovskite

ORAL

Abstract

We present a thorough analysis of the elastic properties of iron- and aluminum-bearing and --free MgSiO3-perovskite. Results from different first principles methods are compared to experimental data available and results for aggregate elastic moduli and velocities are analyzed at lower mantle conditions. Velocity heterogeneities produced by temperature variations and variation of aluminum and iron content are carefully examined and contrasted. This analysis is essential for improving understanding of the constitution of Earth's lower mantle.

*Research supported by NSF awards EAR-1319361, -1019853, and -0810272.

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Authors

  • Gaurav Shukla

    • School of Physics and Astronomy, University of Minnesota

  • Zhongqing Wu

    • Department of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China

  • Renata Wentzcovitch

    • University of Minnesota
    • University of Minnesota, Twin Cities, MN 55455
    • Department of Chemical Engineering and Materials Science, University of Minnesota
    • Department of Chemical Engineering and Materials Science, Minnesota Supercomputing Institute, University of Minnesota, Twin Cities
    • University of Minnesota, Twin Cities, MN, 554555