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T-T-T diagram of serpentine and saponite, and estimation ofmetamorphic heating degree of Antarctic carbonaceous chondrites
https://doi.org/10.15094/00004573
https://doi.org/10.15094/000045734469a42e-ef9e-4483-a8c6-edf8d7417db3
名前 / ファイル | ライセンス | アクション |
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KJ00000036379 (2.0 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||
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公開日 | 1992-03-01 | |||||||
タイトル | ||||||||
タイトル | T-T-T diagram of serpentine and saponite, and estimation ofmetamorphic heating degree of Antarctic carbonaceous 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 | |||||||
ID登録 | ||||||||
ID登録 | 10.15094/00004573 | |||||||
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) |
Akai, Junji
× Akai, Junji
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著者所属(英) | ||||||||
en | ||||||||
Department of Geology and Mineralogy,Faculty of Science,NiigataUniversity | ||||||||
抄録(英) | ||||||||
内容記述タイプ | Other | |||||||
内容記述 | For the estimation of peak thermal metamorphic degree of phyllosilicates in Antarctic carbonaceous chondrites, heating experiments of serpentine and saponite were carried out. A T-T-T diagram of serpentine for elevated temperature was obtained by heating the serpentine in the Murchison CM2 chondrite in vacuo at different temperatures (250∿1100℃) and for different durations (1 hour to 350 hours). Serpentine decomposed into olivine and enstatite through characteristic transitional structures. First decomposition started at about ∿300℃, the transitional structure appears at ca. 400∿500℃, and well-crystallized olivine and enstatite appeared above ∿750℃. In the T-T-T diagram, a minor time dependence was found. A T-T-T diagram of saponite was obtained in a similar was using terrestrial Fe-saponite. Saponite maintained its structure till about 800∿900℃, then decomposition started and finally enstatite was formed. New data on thermally affected phyllosilicates in Yamato (Y)-793321 indicate coexistence of 7Å unaltered serpentine and a transitional structure. Thermally affected saponite in Belgica (B)-7904 was also documented. Based on the T-T-T diagrams, the peak metamorphic degrees and peak temperatures were estimated in the order of B-7904≥Y-86720>Y-82162>Y-793321. | |||||||
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 5, p. 120-135, 発行日 1992-03 |
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出版者 | ||||||||
出版者 | National Institute of Polar Research |