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A ‘dry’ condensation origin for circumstellar carbonates

Author

Listed:
  • Alice Toppani

    (Centre de Recherches Pétrographiques et Géochimiques—CNRS UPR 2300
    Muséum National d'Histoire Naturelle
    Institute for Geophysics and Planetary Physics, Lawrence Livermore National Laboratory)

  • François Robert

    (Muséum National d'Histoire Naturelle)

  • Guy Libourel

    (Centre de Recherches Pétrographiques et Géochimiques—CNRS UPR 2300
    Ecole Nationale Supérieure de Géologie, INPL)

  • Philippe de Donato

    (Laboratoire Environnement et Minéralurgie—CNRS UMR 7569)

  • Odile Barres

    (Laboratoire Environnement et Minéralurgie—CNRS UMR 7569)

  • Louis d'Hendecourt

    (Université Paris-Sud)

  • Jaafar Ghanbaja

    (Faculté des Sciences—Université Henri Poincaré, Nancy I)

Abstract

Water surprise Planetary scientists generally consider carbonates to be a good indication of — at one time or another — the presence of liquid water. On Mars, the geology confirms that the water was there. But a new experiment suggests that the future detection of carbonates around a young star will not necessarily imply the presence of bodies that have had liquid water. Performed in a reaction chamber that mimics circumstellar environments, the experiment shows that carbonates and amorphous silicates can form when a silicate gas condenses in the presence of water vapour and carbon dioxide: no liquid water is necessary.

Suggested Citation

  • Alice Toppani & François Robert & Guy Libourel & Philippe de Donato & Odile Barres & Louis d'Hendecourt & Jaafar Ghanbaja, 2005. "A ‘dry’ condensation origin for circumstellar carbonates," Nature, Nature, vol. 437(7062), pages 1121-1124, October.
    • Handle: RePEc:nat:nature:v:437:y:2005:i:7062:d:10.1038_nature04128
    DOI: 10.1038/nature04128
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