The Provenances of Asteroids, and Their Contributions to the Volatile Inventories of the Terrestrial Planets
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- C. M. O’D. Alexander
- Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, USA.
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- R. Bowden
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
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- M. L. Fogel
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
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- K. T. Howard
- The Natural History Museum, London SW7 5BD, UK.
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- C. D. K. Herd
- The Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada.
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- L. R. Nittler
- Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, USA.
書誌事項
- 公開日
- 2012-08-10
- DOI
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- 10.1126/science.1223474
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:title>Constraining the Birthplace of Asteroids</jats:title> <jats:p> Many primitive meteorites originating from the asteroid belt once contained abundant water that is now stored as OH in hydrated minerals. <jats:bold> Alexander <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="721" related-article-type="in-this-issue" vol="337" xlink:href="10.1126/science.1223474">721</jats:related-article> , published online 12 July) estimated the hydrogen isotopic compositions in 86 samples of primitive meteorites that fell in Antarctica and compared the results to those of comets and Saturn's moon, Enceladus. Water in primitive meteorites was less deuteriumrich than that in comets and Enceladus, implying that, in contradiction to recent models of the dynamical evolution of the solar system, the parent bodies of primitive meteorites cannot have formed in the same region as comets. The results also suggest that comets were not the principal source of Earth's water. </jats:p>
収録刊行物
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- Science
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Science 337 (6095), 721-723, 2012-08-10
American Association for the Advancement of Science (AAAS)
