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Title: Thermodynamic properties of MgSiO 3 at super-Earth mantle conditions

Abstract

Recent discoveries of terrestrial exoplanets distant from our solar system motivate laboratory experiments that provide insight into their formation and thermal evolution. Using laser-driven shock wave experiments, we constrain high-temperature and high-pressure adiabats and the equation of state of MgSiO3 ,a dominant mantle constituent of terrestrial exoplanets. Critical to the development of a habitable exoplanet is the early thermal history, specifically the formation and freezing of the magma ocean and its role in enabling convection in the mantle and core. We measure the adiabatic sound speed and constrain the melt transition along the Hugoniot and find that the adiabats and melt boundary of silicate magmas are shallower than predicted. In conclusion, this suggests that small changes in the temperature of a super-Earth mantle would result in rapid melting and solidification of nearly the entire mantle.

Authors:
 [1];  [1];  [1];  [2];  [3];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1548350
Alternate Identifier(s):
OSTI ID: 1456271
Report Number(s):
LLNL-JRNL-782899
Journal ID: ISSN 2469-9950; PRBMDO; 973808
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 21; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Fratanduono, D. E., Millot, M., Kraus, R. G., Spaulding, D. K., Collins, G. W., Celliers, P. M., and Eggert, J. H. Thermodynamic properties of MgSiO3 at super-Earth mantle conditions. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.214105.
Fratanduono, D. E., Millot, M., Kraus, R. G., Spaulding, D. K., Collins, G. W., Celliers, P. M., & Eggert, J. H. Thermodynamic properties of MgSiO3 at super-Earth mantle conditions. United States. https://doi.org/10.1103/PhysRevB.97.214105
Fratanduono, D. E., Millot, M., Kraus, R. G., Spaulding, D. K., Collins, G. W., Celliers, P. M., and Eggert, J. H. Thu . "Thermodynamic properties of MgSiO3 at super-Earth mantle conditions". United States. https://doi.org/10.1103/PhysRevB.97.214105. https://www.osti.gov/servlets/purl/1548350.
@article{osti_1548350,
title = {Thermodynamic properties of MgSiO3 at super-Earth mantle conditions},
author = {Fratanduono, D. E. and Millot, M. and Kraus, R. G. and Spaulding, D. K. and Collins, G. W. and Celliers, P. M. and Eggert, J. H.},
abstractNote = {Recent discoveries of terrestrial exoplanets distant from our solar system motivate laboratory experiments that provide insight into their formation and thermal evolution. Using laser-driven shock wave experiments, we constrain high-temperature and high-pressure adiabats and the equation of state of MgSiO3 ,a dominant mantle constituent of terrestrial exoplanets. Critical to the development of a habitable exoplanet is the early thermal history, specifically the formation and freezing of the magma ocean and its role in enabling convection in the mantle and core. We measure the adiabatic sound speed and constrain the melt transition along the Hugoniot and find that the adiabats and melt boundary of silicate magmas are shallower than predicted. In conclusion, this suggests that small changes in the temperature of a super-Earth mantle would result in rapid melting and solidification of nearly the entire mantle.},
doi = {10.1103/PhysRevB.97.214105},
journal = {Physical Review B},
number = 21,
volume = 97,
place = {United States},
year = {Thu Jun 21 00:00:00 EDT 2018},
month = {Thu Jun 21 00:00:00 EDT 2018}
}

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Cited by: 22 works
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Works referencing / citing this record:

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