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.

著者: CM Alexander 附属: 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所有著者
版本/格式: 文章 文章 : 英语
资源:Science (New York, N.Y.) 2012 Aug 10; 337(6095): 721-3
其它数据库: 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  再读一些...
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文档类型 文章
所有的著者/提供者: CM Alexander 附属: 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
语言注释: English
专有的标识符 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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