Thermal expansivity, heat capacity and bulk modulus of the mantle

L Stixrude, C Lithgow-Bertelloni - Geophysical Journal …, 2022 - academic.oup.com
We derive exact expressions for the thermal expansivity, heat capacity and bulk modulus for
assemblages with arbitrarily large numbers of components and phases, including the …

Mineral physics constraints on ultra-low velocity zones in the lowermost mantle

SS Esdaille, J Chen - Earth-Science Reviews, 2024 - Elsevier
Ultra-low velocity zones (ULVZs) at the base of Earth's lower mantle inferred from seismic
inversions exhibit up to 50% lower shear velocity (Vs) and up to 25% lower compressional …

Evidence for a Fe3+-rich pyrolitic lower mantle from (Al,Fe)-bearing bridgmanite elasticity data

A Kurnosov, H Marquardt, DJ Frost, TB Ballaran… - Nature, 2017 - nature.com
The chemical composition of Earth's lower mantle can be constrained by combining
seismological observations with mineral physics elasticity measurements,,. However, the …

First-principles calculations of elasticity of minerals at high temperature and pressure

ZQ Wu, WZ Wang - Science China Earth Sciences, 2016 - Springer
The elasticity of minerals at high temperature and pressure (PT) is critical for constraining
the composition and temperature of the Earth's interior and understand better the deep water …

Thermoelasticity of Fe3+‐ and Al‐bearing bridgmanite: Effects of iron spin crossover

G Shukla, M Cococcioni… - Geophysical Research …, 2016 - Wiley Online Library
We report ab initio (LDA+ Usc) calculations of thermoelastic properties of ferric iron (Fe3+)‐
and aluminum (Al)‐bearing bridgmanite (MgSiO3 perovskite), the main Earth forming phase …

Extensive iron–water exchange at Earth's core–mantle boundary can explain seismic anomalies

K Kawano, M Nishi, H Kuwahara, S Kakizawa… - Nature …, 2024 - nature.com
Seismological observations indicate the presence of chemical heterogeneities at the
lowermost mantle, just above the core–mantle boundary (CMB), sparking debate over their …

[HTML][HTML] Path integral Monte Carlo simulations of dense carbon-hydrogen plasmas

S Zhang, B Militzer, LX Benedict, F Soubiran… - The Journal of …, 2018 - pubs.aip.org
Carbon-hydrogen plasmas and hydrocarbon materials are of broad interest to laser shock
experimentalists, high energy density physicists, and astrophysicists. Accurate equations of …

Recreating giants impacts in the laboratory: Shock compression of bridgmanite to 14 Mbar

M Millot, S Zhang, DE Fratanduono… - Geophysical …, 2020 - Wiley Online Library
Understanding giant impacts requires accurate description of how extreme pressures and
temperatures affect the physical properties of the constituent materials. Here, we report …

Confirming a pyrolitic lower mantle using self‐consistent pressure scales and new constraints on CaSiO3 perovskite

N Sun, Z Mao, S Yan, X Wu… - … Research: Solid Earth, 2016 - Wiley Online Library
In this study, we have examined the lower mantle composition and mineralogy by modeling
the density (ρ), bulk sound velocity (VΦ), and dlnρ/dlnVΦ profiles of candidate lower mantle …

Seismic and mineral physics constraints on the D ″layer

JM Jackson, C Thomas - Mantle convection and surface …, 2021 - Wiley Online Library
We present a synthesis of results from seismic and mineral physics studies of the D ″layer
to improve constraints on Earth's lowermost mantle. We focus on structures of two length …