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Timing of ductile deformation and peak metamorphism in Skallevikshalsen, Lutzow-Holm Complex, East Antarctica
https://doi.org/10.15094/00003132
https://doi.org/10.15094/000031320313d6f9-639f-42f4-bea3-3b49eecd4750
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||||
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公開日 | 2004-10-01 | |||||||||
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タイトル | Timing of ductile deformation and peak metamorphism in Skallevikshalsen, Lutzow-Holm Complex, East Antarctica | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
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言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | deformation, fold, interference pattern, Lutzow-Holm Complex, Skallevikshalsen | |||||||||
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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 | 10.15094/00003132 | |||||||||
ID登録タイプ | JaLC | |||||||||
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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 | Timing of ductile deformation and peak metamorphism in Skallevikshalsen, Lutzow-Holm Complex, East Antarctica | |||||||||
著者名(英) |
Kawakami,Tetsuo
× Kawakami,Tetsuo
× Ikeda,Takeshi
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著者所属(英) | ||||||||||
en | ||||||||||
Department of Earth Sciences, Faculty of Education, Okayama University/Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University | ||||||||||
抄録(英) | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | The geological structures of Skallevikshalsen, Lutzow-Holm Complex, East Antarctica are mainly controlled by two stages of ductile deformation, D_(m-1) and D_m. The D_(m-1) stage is characterized by the development of isoclinal F_(m-1) folds with fold axes gently plunging ENE or SWS, and axial planes parallel to the compositional layering (S_(m-1)) of the metamorphic rocks. The D_m stage is characterized by the development of tight folds with axes parallel to F_(m-1) and almost vertical axial planes. An axial planar foliation, S_m, defined by the alignment of biotite and hornblende, is formed in the hinges of F_m folds. No change in direction of elongation took place between D_(m-1) and D_m. Microstructural study and field observations show that a stretching lineation on S_(m-1) defined by the alignment of sillimanite was formed during D_(m-1). The alignment of sillimanite inclusions in garnet rims probably corresponds to an older schistosity formed during D_(m-2), which had a different orientation of principal strain axes than those of D_(m-1) and D_m. Peak metamorphic mineral assemblages are preserved in garnet cores, and their formation is considered to predate D_(m-2). Absence of the alignment of inclusions in garnet cores suggests that peak metamorphism was attained under conditions without strong deformation. | |||||||||
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収録物識別子タイプ | NCID | |||||||||
収録物識別子 | AA1130866X | |||||||||
書誌情報 |
Polar geoscience 巻 17, p. 1-11, 発行日 2004-10 |
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出版者 | ||||||||||
出版者 | National Institute of Polar Research |