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Magnetic Properties of Yamato-7301(j), -7305(k) and -7304(m) Chondrites in Comparison with Their Mineralogical and Chemical Compositions
https://nipr.repo.nii.ac.jp/records/972
https://nipr.repo.nii.ac.jp/records/9723005f330-f6fd-4416-a44c-1188a196c196
名前 / ファイル | ライセンス | アクション |
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KJ00000011518.pdf (2.2 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||
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公開日 | 1979-03-01 | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | Magnetic Properties of Yamato-7301(j), -7305(k) and -7304(m) Chondrites in Comparison with Their Mineralogical and Chemical Compositions | |||||||
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) |
Nagata, Takesi
× Nagata, Takesi
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著者所属(英) | ||||||||
en | ||||||||
National Institute of Polar Research | ||||||||
抄録(英) | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | Magnetic properties, represented by the magnetic hysteresis curves at room temperature and the thermomagnetic curves, of Yamato-7301 (j), -7305 (k), and -7304 (m) chondrites are compared with their chemical and petrographic compositions. Yamato (j) chondrite (H4) contains a metallic phase of 8.0wt% comprising kamacite of 5.3wt% Ni and smaller amounts of plessite and taenite, accompanied by non-magnetic metallic oxides. It seems very likely that the metallic oxides were in the form of hydroxides in the original state and were transformed to substituted magnetites by a heating. The metallic phase has been much oxidized by severe weathering. Yamato (k) chondrite (L5) contains a metallic phase of 8.6wt% comprising kamacite of 6.5wt% Ni and α_2-phase of (13-25)wt% Ni, suggesting that this chondrite was reheated to about 1000℃ and rapidly cooled to result in a production of α_2-phase. Yamato (m) chondrite (L5) contains a metallic phase of 8.3wt% comprising kamacite of 5.5wt% Ni and taenite, suggesting that this chondrite was almost equilibrated because of its very slow cooling and no appreciable effect of later metamorphism. Tables 3 and 4 give their basic magnetic properties, and Table 2 their chemical compositions. | |||||||
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 12, p. 250-269, 発行日 1979-03 |