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METEORIC WATER INFILTRATION IN SKALLEN MARBLES, EAST ANTARCTICA : OXYGEN ISOTOPIC EVIDENCE
https://doi.org/10.15094/00002848
https://doi.org/10.15094/00002848cb050372-9589-4d29-8ca1-570f3ad0a53d
名前 / ファイル | ライセンス | アクション |
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KJ00002368121 (1.1 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1997-09-01 | |||||
タイトル | ||||||
タイトル | METEORIC WATER INFILTRATION IN SKALLEN MARBLES, EAST ANTARCTICA : OXYGEN ISOTOPIC EVIDENCE | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Skallen marbles | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | oxygen isotopes | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | calcite | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | meteoric water | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | fluid infiltration | |||||
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 | 10.15094/00002848 | |||||
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) | |||||
論文名よみ | ||||||
その他のタイトル | METEORIC WATER INFILTRATION IN SKALLEN MARBLES, EAST ANTARCTICA : OXYGEN ISOTOPIC EVIDENCE | |||||
著者名よみ |
/ ワダ, ヒデキ
× / ワダ, ヒデキ |
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著者名(英) |
SATISH-KUMAR, M.
× SATISH-KUMAR, M.× WADA, Hideki |
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著者所属(英) | ||||||
en | ||||||
Department of Geosciences, Osaka City University | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Biology and Geosciences, Shizuoka University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We report here extremely large millimeter scale oxygen isotopic heterogeneity in calcites from a Skallen marble specimen. The δ^<18>O of calcite cores and most of the calcite grain boundaries are grouped around 17‰ while two analyses from the calcite-phlogopite grain boundary show depletion to -1‰. A corresponding δ^<13>C enrichment (only 0.7‰) is also observed. The δ^<13>C of graphite does not show any heterogeneity. The homogeneity of δ^<18>O and δ^<13>C of calcite (except for the local depletion) and δ^<13>C of graphite indicate that the marbles evolved through prograde and peak metamorphism with possible internal fluid buffering. The variations observed in carbon and oxygen isotopes can be ascribed to devolatilization reactions. The peak metamorphic temperature estimate by carbon isotope thermometry gave 760℃, consistent with regional peak metamorphic conditions. The local occurrence of isotopic heterogeneity on the calcite-phlogopite boundary suggests that there was meteoric water infiltration during the late stages of metamorphic history. Millimeter scale gigantic oxygen isotopic heterogeneity is observed for the first time in metamorphic rocks. The mechanism of isotope exchange invloved is unclear in the present study, but may indicate a process of fluid flow through preferential grain boundaries and by solution-reprecipitation or diffusion. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1072335X | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Geosciences 巻 10, p. 111-119, 発行日 1997-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |