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Fluid inclusions in an osumilite-bearing granulite from Bunt Island in the Archean Napier Complex, East Antarctica: implications for a decompressional P-T path?
https://doi.org/10.15094/00003122
https://doi.org/10.15094/00003122dbd0be3b-6467-45e2-83c7-c89491c44c25
名前 / ファイル | ライセンス | アクション |
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KJ00000044116 (1.6 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2003-10-01 | |||||
タイトル | ||||||
タイトル | Fluid inclusions in an osumilite-bearing granulite from Bunt Island in the Archean Napier Complex, East Antarctica: implications for a decompressional P-T path? | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Carbonic fluid inclusion | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ultrahigh-temperature granulite | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Bunt Island | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Archean Napier Complex | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | East Antarctica | |||||
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 | 10.15094/00003122 | |||||
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) |
Tsunogae, Toshiaki
× Tsunogae, Toshiaki× Santosh, M.× Osanai, Yasuhito× Owada, Masaaki× Toyoshima, Tsuyoshi× Hokada, Tomokazu× Crowe, Warwick A. |
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著者所属(英) | ||||||
en | ||||||
Department of Geology, Rand Afrikaans University/Department of Natural Environmental Science, Kochi University/Department of Earth Sciences, Okayama University/Department of Earth Sciences, Yamaguchi University/Graduate School of Science and Technology, Niigata University/National Institute of Polar Research/Department of Geology and Geophysics, University of Western Australia | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We report high-density CO_2-rich fluid inclusions in garnet,orthopyroxene,and quartz from an osumilite-bearing aluminous granulite from Bunt Island of the Archean Napier Complex,East Antarctica.The melting temperatures of fluids lie in the range of -56.8 to -57.8゜C being close to the triple point for pure CO_2 (-56.6゜C ). Homogenization of the CO_2,-rich fluids into the liquid phase occurs at temperatures in the range of -35.4 to 24.7゜C. This translates into CO_2 densities in the range of 0.788-1.084g/cm^3 .The estimated CO_2 ,isochore for high-density inclusions in garnet intersects the P-T trajectory of Bunt Island at around 10 kbar at 1050゜C, which corresponds to the peak metamorphic conditions of the region derived from mineral phase equilibria.We therefore infer that CO_2 ,was the dominant fluid species present during the ultrahigh-temperature metamorphism in Bunt Island.CO_2 inclusions with lower density occurring in quartz and garnet provide isochores that intersect the P-T path at <7 kbar and <950゜C indicating density reversal of originally high-density inclusions along a decompressional exhumation path of the ultrahigh-temperature rocks in the Bunt Island. | |||||
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 16, p. 61-75, 発行日 2003-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |