WEKO3
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LREE-enriched mafic gneiss and meta-ultramafic rock from Tonagh Island in the Napier Complex, East Antarctica
https://doi.org/10.15094/00003067
https://doi.org/10.15094/00003067232393b9-e623-4609-97f1-3372f84e952d
名前 / ファイル | ライセンス | アクション |
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KJ00000044184 (2.3 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2000-10-01 | |||||
タイトル | ||||||
タイトル | LREE-enriched mafic gneiss and meta-ultramafic rock 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 | Archaean | |||||
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 | mafic gneiss and meta-ultramafic rock | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | REE geochemistry | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | source mantle | |||||
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 | 10.15094/00003067 | |||||
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) |
Owada,Masaaki
× Owada,Masaaki× Osanai,Yasuhito× Tsunogae,Toshiaki× Toyoshima,Tsuyoshi× Hokada, Tomokazu× Crowe,Warwick A. |
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著者所属(英) | ||||||
en | ||||||
Department of Earth Sciences, Yamaguchi University/Department of Earth Sciences, Okayama University/Department of Earth Sciences, Shimane 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 | Mafic gneisses and meta-ultramafic rocks are exposed on Tonagh Island These rocks are high-Mg composition and have undergone ultrahigh-temperature metamorphism Most of the mafic gneisses and the meta-ultramafic rocks occur as intercalated layers or lenses within the quartzo-feldspathic gneisses Some of the mafic gneisses and the meta-ultramafic rocks locally cut the layers or foliations of neighboring quartzo-feldspathic gneisses, suggesting that these mafic gneisses and meta-ultramafic rocks were originally intrusive rocks Major and trace element compositions of the mafic gneisses and the meta-ultramafic rocks resemble those of komatiitic basalt to komatiite from the Archaean greenstone belt Light REE-enriched and flat patterns are recognized in the mafic gneisses and meta-ultramafic rocks although the REE pattern of the deformed sample is convex upward In the Mt Riiser-Larsen region situated 40 km northeast from Tonagh Island, it has been found in a previous study that the LREE-enriched mafic gneisses and meta-ultramafic rocks have been derived from komatiitic rocks whose chemical trends show magmatic variations Therefore, the LREE-enriched patterns of mafic gneisses and ultramafic rocks on Tonagh Island and in the Mt Riiser-Larsen region could be inherited from the chemical nature of original rocks prior to undergoing ultrahigh-temperature metamorphism The LREE-enriched pattern cannot be explained by interaction between an LREE-flat parental magma and an LREE-enriched crustal material m terms of geochemical constraints Hence, the LREE-enriched and flat types of the mafic gneisses and the meta-ultramafic rocks on Tonagh Island would have been derived from different source mantles with respect to LREE signatures | |||||
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 13, p. 86-102, 発行日 2000-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |