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The carbon and nitrogen stable isotope geochemistry of two lunar meteorites: ALHA-81005 and Y-86032
https://doi.org/10.15094/00004507
https://doi.org/10.15094/000045072455b800-5b33-49bf-b84f-8b948eefb1cd
名前 / ファイル | ライセンス | アクション |
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KJ00000036313 (1.7 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||||
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公開日 | 1990-10-01 | |||||||||
タイトル | ||||||||||
タイトル | The carbon and nitrogen stable isotope geochemistry of two lunar meteorites: ALHA-81005 and Y-86032 | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
資源タイプ | ||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
資源タイプ | departmental bulletin paper | |||||||||
ID登録 | ||||||||||
ID登録 | 10.15094/00004507 | |||||||||
ID登録タイプ | JaLC | |||||||||
ページ属性 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | P(論文) | |||||||||
著者名(英) |
Grady,Monica M.
× Grady,Monica M.
× Pillinger,Colin T.
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著者所属(英) | ||||||||||
en | ||||||||||
Planetary Sciences Unit, Department of Earth Sciences, The Open University/Planetary Sciences Unit, Department of Earth Sciences, The Open University | ||||||||||
抄録(英) | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | The carbon and nitrogen stable isotope geochemistry of two lunar meteorites, ALHA-81005 and Y-86032 has been compared with that of an Apollo 16 regolith breccia, 60016. Although much of the carbon present in all three samples is terrestrial organic contamination, the meteorites have higher carbon abundances and lighter isotopic compositions than 60016. The non-contaminant carbon in ALHA-81005 and Y-86032 occurs as two distinct components, combusting between 550-700℃ and 900-1100℃. Since these components are absent from the pristine lunar breccia, they must have been added (i) from the impactor which ejected the meteorites from the Moon; (ii) in the Antarctic or (iii) be representative of a lunar environment not sampled by Apollo missions. At temperatures over 1100℃, spallogenic carbon combusts, with elevated δ^<13>C, greater than 0‰. Nitrogen systematics are less-well resolved than carbon, partly due to the lower amounts of nitrogen gas liberated by the meteorites. Nitrogen abundance of ALHA-81005 and Y-86032 fall in the range of values from lunar breccias and δ^<15>N values follow the heavy-light-heavy pattern characteristic of such samples. Spallogenic carbon and nitrogen are more abundant in ALHA-81005 than Y-86032,in keeping with its longer exposure age. Nitrogen data are consistent with identification of ALHA-81005 and Y-86032 as lunar highland breccias compacted from immature regolithic material. | |||||||||
雑誌書誌ID | ||||||||||
収録物識別子タイプ | NCID | |||||||||
収録物識別子 | AA10784627 | |||||||||
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Meteorites 巻 3, p. 27-39, 発行日 1990-10 |
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出版者 | ||||||||||
出版者 | National Institute of Polar Research |