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Geochemical characteristics of two types of early Paleozoic granitoids from the Soer Rondane Mountains, East Antarctica
https://doi.org/10.15094/00003089
https://doi.org/10.15094/0000308949b724f3-a892-4431-be4b-7748e4afe638
名前 / ファイル | ライセンス | アクション |
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KJ00000044207 (2.2 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 | Geochemical characteristics of two types of early Paleozoic granitoids from the Soer Rondane Mountains, East Antarctica | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | early Paleozoic volcanic-arc type and within-plate type granitoids | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | trace and rare earth elements | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | petrogenesis | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Sor Rondane Mountains | |||||
キーワード | ||||||
言語 | en | |||||
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 | 10.15094/00003089 | |||||
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 | Geochemical characteristics of two types of early Paleozoic granitoids from the Soer Rondane Mountains, East Antarctica | |||||
著者名(英) |
Li, Zilong
× Li, Zilong× Tainosho, Yoshiaki× Shiraishi, Kazuyuki× Owada, Masaaki× Kimura, Jun-ichi |
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著者所属(英) | ||||||
en | ||||||
Graduate School of Science and Technology, Kobe University/Faculty of Human Development, Kobe University/National Institute of Polar Research/Department of Earth Sciences, University of Yamaguchi/Department of Geology, Shimane University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Early Paleozoic granitoids of the S0r Rondane Mountains, which occur as stocks, batholiths or sheets and intrude into late Proterozoic high- to intermediate-grade metamorphic rocks, represent prominent Pan-African to post Pan-African intermediateacidic magmatic events. They are mainly composed of granite and syenite and are enriched in alkalis. Based on geochemical features, there are two types of early Paleozoic granitoids: (1) volcanic-arc type (including Dufek and Lunckeryggen) granitoid, and (2) within-plate type (including Austkampane, Pingvinane, Vikinghogda and Rogerstoppane) granitoid. The volcanic-arc type granitoid has higher Mg#, Sr, and Sr/Ba, Sr/Y, La/Sm, La/Yb and LREE/HREE ratios, lower A/CNK and Ga/Al ratios, and ΣREE with no or positive Eu anomalies. On the other hand, the within-plate type granitoid has relatively higher A/CNK and Ga/Al ratios, and ΣREE, lower Mg#, Sr, and Sr/Ba, Sr/Y, La/Sm, La/Yb and LREE/HREE ratios with moderate to strong negative Eu anomalies. Geochemical characteristics as well as isotopic data of two types of early Paleozoic granitoids indicate two possibilities of their petrogenesis. One is that the volcanic-arc type granitoid may have been derived from deeper parental magma source by process of fractional crystallization with or without assimilation and/or mixing, subsequently, successive fractional crystallization from the same magma source (should be altered components) after assimilation by crustal materials during ascending, to produce the within-plate type granitoid; the other is that they are derived from different source materials and have different processes. The volcanic-arc type granitoid may be derived from partial melting of the Nils Larsen tonalite with minor mixing with, for example, host gneisses, while the within-plate type granitoid is formed by assimilation of crustal materials of host metamorphic rocks by the melt and then fractional crystallization. | |||||
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. 119-138, 発行日 2001-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |