Earth's water may have been inherited from material similar to enstatite chondrite meteorites (original) (raw)
Article Dans Une Revue Science Année : 2020
Résumé
The origin of Earth’s water remains unknown. Enstatite chondrite (EC) meteorites have similar isotopic composition to terrestrial rocks and thus may be representative of the material that formed Earth. ECs are presumed to be devoid of water because they formed in the inner Solar System. Earth’s water is therefore generally attributed to the late addition of a small fraction of hydrated materials, such as carbonaceous chondrite meteorites, which originated in the outer Solar System where water was more abundant. We show that EC meteorites contain sufficient hydrogen to have delivered to Earth at least three times the mass of water in its oceans. EC hydrogen and nitrogen isotopic compositions match those of Earth’s mantle, so EC-like asteroids might have contributed these volatile elements to Earth’s crust and mantle.
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https://hal.science/hal-02933795
Soumis le : mardi 8 septembre 2020-18:04:37
Dernière modification le : mardi 12 août 2025-17:10:14
Archivage à long terme le : mercredi 2 décembre 2020-23:25:45
Citer
Laurette Piani, Yves Marrocchi, Thomas Rigaudier, Lionel G Vacher, Dorian Thomassin, et al.. Earth's water may have been inherited from material similar to enstatite chondrite meteorites. Science, 2020, 369 (6507), pp.1110-1113. ⟨10.1126/science.aba1948⟩. ⟨hal-02933795⟩
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