Cited by 279High-pressure geophysics and materialsGeological and Geochemical AnalysisBoron and Carbon Nanomaterials Research

Stability of magnesite and its high-pressure form in the lowermost mantle

Isshiki, Maiko, Irifune, Tetsuo, Hirose, Kei, Ono, Shigeaki, Ohishi, Yasuo, Watanuki, Tetsu, Nishibori, Eiji, Takata, Masaki +1 more·2004·Nature

Abstract

Carbonates are important constituents of marine sediments and play a fundamental role in the recycling of carbon into the Earth's deep interior via subduction of oceanic crust and sediments. Study of the stability of carbonates under high pressure and temperature is thus important for modelling the carbon budget in the entire Earth system. Such studies, however, have rarely been performed under appropriate lower-mantle conditions and no experimental data exist at pressures greater than 80 GPa (refs 3-6). Here we report an in situ X-ray diffraction study of the stability of magnesite (MgCO(3)), which is the major component of subducted carbonates, at pressure and temperature conditions approaching those of the core-mantle boundary. We found that magnesite transforms to an unknown form at pressures above approximately 115 GPa and temperatures of 2,100-2,200 K (depths of approximately 2,600 km) without any dissociation, suggesting that magnesite and its high-pressure form may be the major hosts for carbon throughout most parts of the Earth's lower mantle.

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Crossref · 10.1038/nature02181

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  • High-pressure phase transitions were observed in magnesite and Fe-magnesite.

    “High-pressure phase transitions were observed in magnesite and Fe-magnesite (Boulard et al., 2011;Isshiki et al., 2004).”

    From Structures and Crystal Chemistry of Carbonate at Earth's Mantle Conditions (2020) · cites this paper as Isshiki et al., 2004

  • Magnesite is considered to be a potentially major reservoir of carbon in the Earth's mantle.

    “Considered to be a potentially major reservoir of carbon in the Earth's mantle (Wang et al., 1996; Isshiki et al., 2004; Hazen and Schiffries, 2013)”

    From Clumped-isotope thermometry of magnesium carbonates in ultramafic rocks (2016) · cites this paper as Isshiki et al., 2004

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Authors
Isshiki, M., Irifune, T., Hirose, K., Ono, S., Ohishi, Y., Watanuki, T., Nishibori, E., Takata, M., & Sakata, M.
Affiliations
  • Ehime University (JP)
  • Tokyo Institute of Technology (JP)
  • Japan Agency for Marine-Earth Science and Technology (JP)
  • Japan Synchrotron Radiation Research Institute (JP)
  • SPring-8 (JP)
  • Nagoya University (JP)
Corresponding author
  • Isshiki, Maiko
  • Irifune, Tetsuo
Venue
Nature
Published
2004-01
Volume
427
Issue
6969
Pages
60-63
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1984885274
Cited by
279
References
26
Citations by year
2026: 14 · 2025: 11 · 2024: 11 · 2023: 3 · 2022: 15 · 2021: 16 · 2020: 24 · 2019: 15 · 2018: 12 · 2017: 23 · 2016: 13 · 2015: 16 · 2014: 12 · 2013: 13 · 2012: 8
FWCI
6.85
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › High-pressure geophysics and materials
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
  • Physical Sciences › Materials Science › Materials Chemistry › Boron and Carbon Nanomaterials Research
Keywords
magnesite, high-pressure phase transformation, lower mantle, carbonate stability, subducted carbonates, carbon cycle, core-mantle boundary, in situ X-ray diffraction

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