The Thermal Conductivity of Bridgmanite at Lower Mantle Conditions Using a Multi‐Technique Approach-Reference-Cited by-同舟云学术

The Thermal Conductivity of Bridgmanite at Lower Mantle Conditions Using a Multi‐Technique Approach

Published:2024-06 Issue:6 Volume:129 Page:
ISSN:2169-9313
Container-title:Journal of Geophysical Research: Solid Earth
language:en
Short-container-title:JGR Solid Earth

Author:

Edmund Eric¹,Chuvashova Irina¹²^ORCID,Konôpková Zuzana³,Husband Rachel⁴^ORCID,Strohm Cornelius⁴,Appel Karen³^ORCID,Bähtz Carsten³⁵,Ball Orianna⁶,Bouffetier Victorien³,Brugman Kara¹⁷^ORCID,Buakor Khachiwan³,Chantel Julien⁸,Chariton Stella⁹,Duff Matthew⁶,Dwivedi Anand³^ORCID,Glazyrin Konstantin⁴^ORCID,Hosseini‐Saber S. M. A.⁴^ORCID,Jaisle Nicolas¹⁰^ORCID,Laurus Torsten⁴^ORCID,Li Xiang¹¹,Masani Bernhard⁶,McHardy James⁶^ORCID,McMahon Malcolm⁶,Merkel Sébastien⁸^ORCID,Mohrbach Katharina⁴¹¹,Mondal Anshuman⁴¹¹^ORCID,Morard Guillaume¹⁰^ORCID,Prakapenka Vitali B.⁹^ORCID,Prescher Clemens¹²^ORCID,Ryu Young‐Jay⁹,Schwinkendorf Jan‐Patrick³,Tang Minxue⁴,Younes Zena⁶^ORCID,Sanchez‐Valle Carmen¹¹,Liermann Hanns‐Peter⁴^ORCID,Badro James¹³^ORCID,Lin Jung‐Fu¹⁴^ORCID,McWilliams R. Stewart⁶,Goncharov Alexander F.¹^ORCID

Affiliation:

1. Carnegie Science Earth and Planets Laboratory Washington DC USA

2. Now at Florida International University Miami FL USA

3. European XFEL GmbH Schenefeld Germany

4. Deutsches Elektronen‐Synchrotron DESY Hamburg Germany

5. Now at Institute of Radiation Physics Helmholtz‐Zentrum Dresden‐Rossendorf e.V. Dresden Germany

6. The School of Physics and Astronomy, Centre for Science at Extreme Conditions, and SUPA University of Edinburgh Edinburgh UK

7. Now at Facility for Open Research in a Compressed Environment Arizona State University Tempe AZ USA

8. University Lille CNRS INRAE Centrale Lille UMR 8207 ‐ UMET ‐ Unité Matériaux et Transformations Lille France

9. Center for Advanced Radiation Sources The University of Chicago Chicago IL USA

10. Université Grenoble Alpes Université Savoie Mont Blanc CNRS IRD IFSTTAR ISTerre Grenoble France

11. University of Münster Institut für Mineralogie Corrensstraße 24 Münster Germany

12. Institute of Earth and Environmental Sciences University of Freiburg Freiburg Germany

13. Université Paris Cité Institut de physique du globe de Paris CNRS 1 rue Jussieu Paris France

14. Department of Earth and Planetary Sciences Jackson School of Geosciences The University of Texas at Austin Austin TX USA

Abstract

AbstractThe thermal conductivity of bridgmanite, the primary constituent of the Earth's lower mantle, has been investigated using diamond anvil cells at pressures up to 85 GPa and temperatures up to 3,100 K. We report the results of time‐domain optical laser flash heating and X‐ray Free Electron Laser heating experiments from a variety of bridgmanite samples with different Al and Fe contents. The results demonstrate that Fe or Fe,Al incorporation in bridgmanite reduces thermal conductivity by about 50% in comparison to end‐member MgSiO3 at the pressure‐temperature conditions of Earth's lower mantle. The effect of temperature on the thermal conductivity at 28–60 GPa is moderate, well described as , where a is 0.2–0.5. The results yield thermal conductivity of 7.5–15 W/(m × K) in the thermal boundary layer of the lowermost mantle composed of Fe,Al‐bearing bridgmanite.

Funder

National Science Foundation

Carnegie Institution for Science

Publisher

American Geophysical Union (AGU)

Link

https://agupubs.onlinelibrary.wiley.com/doi/am-pdf/10.1029/2024JB028823

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