| DOI: | 10.1038/ngeo2451
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| 论文题名: | Nitrogen isotope variations in the Solar System |
| 作者: | Füri E.; Marty B.
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| 刊名: | Nature Geoscience
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| ISSN: | 17520894
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| 出版年: | 2015
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| 卷: | 8, 期:7 | | 起始页码: | 515
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| 结束页码: | 522
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| 语种: | 英语
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| 英文摘要: | The relative proportion of the two isotopes of nitrogen, 14 N and 15 N, varies dramatically across the Solar System, despite little variation on Earth. NASA's Genesis mission directly sampled the solar wind and confirmed that the Sun-and, by inference, the protosolar nebula from which the Solar System formed-is highly depleted in the heavier isotope compared with the reference nitrogen isotopic composition, that of Earth's atmosphere. In contrast, the inner planets, asteroids, and comets are enriched in 15 N by tens to hundreds of per cent; organic matter in primitive meteorites records the highest 15 N/14 N isotopic ratios. The measurements indicate that the protosolar nebula, inner Solar System, and cometary ices represent three distinct isotopic reservoirs, and that the 15 N enrichment generally increases with distance from the Sun. The 15 N enrichments were probably not inherited from presolar material, but instead resulted from nitrogen isotope fractionation processes that occurred early in Solar System history. Improvements in analytical techniques and spacecraft observations have made it possible to measure nitrogen isotopic variability in the Solar System at a level of accuracy that offers a window into the processing of early Solar System material, large-scale disk dynamics and planetary formation processes. © 2015 Macmillan Publishers Limited. All rights reserved. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/106368
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| Appears in Collections: | 气候减缓与适应
科学计划与规划
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作者单位: | Centre de Recherches Pétrographiques et Géochimiques, CNRS-Université de Lorraine, 15 Rue Notre Dame des Pauvres, Vandoeuvre-lès-Nancy, France
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| Recommended Citation: | |
Füri E.,Marty B.. Nitrogen isotope variations in the Solar System[J]. Nature Geoscience,2015-01-01,8(7)
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