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Experimental constraints on partial melting under UHT and dry conditions of quartzo-feldspathic rock in the Napier Complex, East Antarctica
https://doi.org/10.15094/00003084
https://doi.org/10.15094/00003084b8b894a1-70b2-4638-98b4-df42107db257
名前 / ファイル | ライセンス | アクション |
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KJ00000044202 (1.9 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2001-10-01 | |||||
タイトル | ||||||
タイトル | Experimental constraints on partial melting under UHT and dry conditions of quartzo-feldspathic rock 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 | dry condition | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | feldspar | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | melting experiment | |||||
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 | ultrahigh-temperature (UHT) 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 | 10.15094/00003084 | |||||
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× Arima, Makoto |
|||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Environmental Sciences, Yokohama National University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We carried out high pressure melting experiments on a mixture of mineral separates of quartz, plagioclase (antiperthite) and a rare amount of orthopyroxene at 1000-1150℃ and 1.0 Gpa under dry conditions. The starting material was obtained from an ultrahigh-temperature (UHT) garnet-orthopyroxene-bearing quartzo-feldspathic gneiss in the Mt. Riiser-Larsen of the Napier Complex, East Antarctica. This UHT gneiss is considered to be equilibrated at metamorphic conditions >1070℃. The mineral assemblages in the run products at 1000℃ and 1100℃ are the same as those of the starting material. K_2O content in K-feldspar lamellae of antiperthite decreases with temperature. Granitic glass (<10 vol%) was detected along boundaries between lamella-free plagioclase and quartz grains in the run at 1150℃. The experimental results indicate that the homogenization temperature of this antiperthite lies <1150℃ at 1.0 Gpa. It is consistent with the estimated temperature from feldspar geothermometry. Major element composition of the glass at 1150℃ shows the molecular Al_2O_3/(Na_2O+K_2O+CaO) ratio (A.S.I.: aluminum saturation index) = 1.08 and high Na_2O+K_2O contents (8.1 wt%) relative to low CaO (1.3 wt%), which is comparable to the chemical features of A-type granite or leucogranite. This may imply that some genetic links might exist between UHT metamorphism and A-type granite magmatism in the Napier Complex. | |||||
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 14, p. 39-52, 発行日 2001-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |