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Ni-Fe metals in the type 3 ordinary chondrites
https://nipr.repo.nii.ac.jp/records/1381
https://nipr.repo.nii.ac.jp/records/1381849471a3-e2c5-4086-8412-2765e472ba6e
名前 / ファイル | ライセンス | アクション |
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KJ00000012015.pdf (1.4 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||
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公開日 | 1982-12-01 | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | Ni-Fe metals in the type 3 ordinary chondrites | |||||||
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 | |||||||
ページ属性 | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | P(論文) | |||||||
著者名(英) |
Nagahara, Hiroko
× Nagahara, Hiroko
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著者所属(英) | ||||||||
en | ||||||||
Geological Institute, University of Tokyo | ||||||||
抄録(英) | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | Metals in four type 3 ordinary chondrites (ALH-77015,-77278,-77299 and -77304) are classified into four types based on their occurrence; those within chondrules, those on the surface of chondrules, those in the matrix and those forming chondrules. Metals within chondrules have higher Co contents than those on the surface or in the matrix, indicating that they would have cystallized from the liquid at higher temperatures. Modal ratios of discrete kamacite, discrete taenite and coexisting grains are different from those in the chondrites of higher petrologic types, and they are considered not to have been heated above about 500℃. Most metals in the type 3 ordinary chondrites show compositional zoning due to decreasing temperature; however, zoning in kamacite is more conspicuous than in the chondrites of higher petrologic types. According to diffusion coefficients of Ni in kamacite and taenite, metals in the type 3 ordinary chondrites should have cooled 2 orders of magnitude more rapidly below 500℃ than those in the chondrites of higher petrologic types. This difference would be a constraint for the estimation of the parental body of the ordinary chondrites. | |||||||
雑誌書誌ID | ||||||||
収録物識別子タイプ | NCID | |||||||
収録物識別子 | AA00733561 | |||||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 25, p. 86-96, 発行日 1982-12 |