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Consortium study of labile trace elements in some Antarctic carbonaceous chondrites: Antarctic and non-Antarctic meteorite comparisons
https://doi.org/10.15094/00004511
https://doi.org/10.15094/00004511826092fd-9d43-44ea-b23e-bdde141f9ceb
名前 / ファイル | ライセンス | アクション |
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KJ00000036317 (1.9 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 | Consortium study of labile trace elements in some Antarctic carbonaceous chondrites: Antarctic and non-Antarctic meteorite comparisons | |||||||||
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 | 10.15094/00004511 | |||||||||
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) |
Paul,Rick L.
× Paul,Rick L.
× Lipschutz,Michael E.
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著者所属(英) | ||||||||||
en | ||||||||||
Department of Chemistry, Purdue University/Department of Chemistry, Purdue University | ||||||||||
抄録(英) | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | We report data for Ag, Au, Bi, Cd, Co, Cs, Ga, In, Rb, Sb, Se, Te, Tl, U and Zn determined by radiochemical neutron activation analysis in consortium samples of Belgica (B)-7904,Yamato (Y)-82042,Yamato-82162 and Yamato-86720 carbonaceous chondrites. These trace elements cover a wide volatility/mobility range and give unique information on thermal histories of meteorites. The results indicate the unique nature of these carbonaceous chondrites. Y-82042 proves to have the volatile element pattern of a C2 (≡CM) chondrite and the petrologic characteristics of a C1 (≡CI) chondrite. These must be primary nebular condensation/accretion features, unaffected by post-accretionary processes. The other three meteorites were thermally metamorphosed in ≥2 parent regions over the 600-700℃ range, at relative temperatures B-7904<Y-82162<Y-86720. Before heating, B-7904 and Y-86720 had C2-levels of volatile elements : Y-82162 had uniquely high volatile element concentrations, at about C1-levels. The data require a new classification scheme for such chondrites. Belgica-7904 and Y-82162 and -86720 seem to be derived from one or more thermally altered carbonaceous asteroids and their spectral characteristics should be compared with those of B-, F-, G-, or T-asteroids. These results indicate substantial differences in the thermal histories of Antarctic and non-Antarctic C1 and C2 chondrite populations. In reviewing all that is known about the Antarctic and non-Antarctic meteorite populations, the overwhelming weight of evidence supports the view that these populations sample different extraterrestrial source materials, differing in thermal histories. It may be that over the extended collecting period of the Antarctic ice sheet, it has sampled a considerable greater proportion of near-Earth asteroids than do current falls. | |||||||||
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. 80-95, 発行日 1990-10 |
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出版者 | ||||||||||
出版者 | National Institute of Polar Research |