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Petrology and metamorphism of sapphirine-bearing aluminous gneisses from Tonagh Island in the Napier Complex, East Antarctica
https://doi.org/10.15094/00003042
https://doi.org/10.15094/0000304246643ad8-2660-46e4-8f3f-8ce3256b68c4
名前 / ファイル | ライセンス | アクション |
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KJ00000044159 (4.0 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1999-10-01 | |||||
タイトル | ||||||
タイトル | Petrology and metamorphism of sapphirine-bearing aluminous gneisses from Tonagh Island in the Napier Complex, East Antarctica | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Aluminous gneiss | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Napier Complex | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Sapphirine | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Tonagh Island | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ultrahigh-temperature metamorphism | |||||
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 | 10.15094/00003042 | |||||
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) |
Hokada, Tomokazu
× Hokada, Tomokazu× Osanai, Yasuhito× Toyoshima, Tsuyoshi× Owada, Masaaki× Tsunogae, Toshiaki× Crowe, Warwick A. |
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著者所属(英) | ||||||
en | ||||||
Department of Polar Science, School of Mathematical and Physical Sciences, The Graduate University for Advanced Studies/Department of Earth Sciences, Faculty of Education, Okayama University/Graduate School of Sciences and Technology, Niigata University/Department of Earth Sciences, Faculty of Science, Yamaguchi University/Faculty of Education, Shimane University/Department of Geology and Geophysics, University of Western Australia | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | A variety of Mg-rich silica-undersaturated aluminous gneisses containing sapphirine, spinel and corundum occur within the ultrahigh-temperature (UHT) metamorphic sequence at Tonagh Island in the Napier Complex, East Antarctica. They occur as blocks or pods in quartzo-feldspathic gneisses or mafic granulite, or as thin layers around ultramafic rocks. The modes of occurrence, constituent minerals and mineral textures of these aluminous gneisses are different from each other, suggesting that they are derived from different protoliths or formation processes. Field occurrences suggest that some of the aluminous gneisses on Tonagh Island may not be simple pelitic precursors but were formed through processes associated with partial melting or metasomatism. Various reaction textures and compositional zoning in constituent minerals, which reflect retrograde metamorphism, are commonly observed in these rocks. Garnet-orthopyroxene geothermobarometry using the chemical compositions of the cores of garnet and orthopyroxene yields slightly lower temperatures (800-1000℃ at 0.5-1.0 Gpa) than the thermal climax (1100℃). Pressure condition of 0.8-1.1 Gpa at the thermal peak (1030-1100℃) is estimated from the garnet-orthopyroxene geobarometry. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1130866X | |||||
書誌情報 |
Polar geoscience 巻 12, p. 49-70, 発行日 1999-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |