The provenances of asteroids, and their contributions to the volatile inventories of the terrestrial planets. (文章, 2012) [WorldCat.org]
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The provenances of asteroids, and their contributions to the volatile inventories of the terrestrial planets.
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The provenances of asteroids, and their contributions to the volatile inventories of the terrestrial planets.

作者: CM Alexander 有關機構: Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, USA. alexander@dtm.ciw.eduR BowdenML FogelKT HowardCD Herd所有作者
版本/格式: 文章 文章 : 英語
資源:Science (New York, N.Y.) 2012 Aug 10; 337(6095): 721-3
其他資料庫: WorldCatWorldCat
提要:
Determining the source(s) of hydrogen, carbon, and nitrogen accreted by Earth is important for understanding the origins of water and life and for constraining dynamical processes that operated during planet formation. Chondritic meteorites are asteroidal fragments that retain records of the first few million years of solar system history. The deuterium/hydrogen (D/H) values of water in carbonaceous chondrites are  再讀一些...
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文件類型 文章
所有的作者/貢獻者: CM Alexander 有關機構: Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, USA. alexander@dtm.ciw.edu; R Bowden; ML Fogel; KT Howard; CD Herd; LR Nittler
ISSN:0036-8075
語言註釋: English
專有的識別號: 805889191
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摘要:

Determining the source(s) of hydrogen, carbon, and nitrogen accreted by Earth is important for understanding the origins of water and life and for constraining dynamical processes that operated during planet formation. Chondritic meteorites are asteroidal fragments that retain records of the first few million years of solar system history. The deuterium/hydrogen (D/H) values of water in carbonaceous chondrites are distinct from those in comets and Saturn's moon Enceladus, implying that they formed in a different region of the solar system, contrary to predictions of recent dynamical models. The D/H values of water in carbonaceous chondrites also argue against an influx of water ice from the outer solar system, which has been invoked to explain the nonsolar oxygen isotopic composition of the inner solar system. The bulk hydrogen and nitrogen isotopic compositions of CI chondrites suggest that they were the principal source of Earth's volatiles.

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