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PRELIMINARY REPORT ON STRUCTURES OF FOREFINGER POINT, ENDERBY LAND, EAST ANTARCTICA
https://doi.org/10.15094/00002754
https://doi.org/10.15094/0000275417c89659-70a4-446c-97bc-fcf8758dcb7b
名前 / ファイル | ライセンス | アクション |
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KJ00002368384 (1.5 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1994-09-01 | |||||
タイトル | ||||||
タイトル | PRELIMINARY REPORT ON STRUCTURES OF FOREFINGER POINT, ENDERBY LAND, EAST ANTARCTICA | |||||
言語 | ||||||
言語 | eng | |||||
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 | 10.15094/00002754 | |||||
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 | PRELIMINARY REPORT ON STRUCTURES OF FOREFINGER POINT, ENDERBY LAND, EAST ANTARCTICA | |||||
著者名よみ |
イシカワ, マサヒロ
× イシカワ, マサヒロ× モトヨシ, ヨウイチ / |
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著者名(英) |
ISHIKAWA, Masahiro
× ISHIKAWA, Masahiro× MOTOYOSHI, Yoichi× FRASER, Geoffrey L. |
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著者所属(英) | ||||||
en | ||||||
Institute of Geology and Paleontology, Faculty of Science, Tohoku University | ||||||
著者所属(英) | ||||||
en | ||||||
National Institute of Polar Research | ||||||
著者所属(英) | ||||||
en | ||||||
Research School of Earth Sciences, Australian National University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Granulite-facies metamorphic rocks of Forefinger Point, which lie on the Casey Bay coastline in Enderby Land, have been affected by three stages of folding, shear zone formation, and intrusion of pegmatite. The peak metamorphic structural evolution was characterized by the development of F_n isoclinal to close buckling folds. This deformation was associated with the coexistence of orthopyroxene+sillimanite±quartz, and was followed by the formation of cordierite and symplectites of cordierite+sapphirine, orthopyroxene+cordierite+sapphirine in response to subsequent isothermal decompression. These symplectic intergrowths are generally unstrained except in some cordierite domains where cordierite exhibits a weak mineral lineation, implying that intense ductile deformation had ceased before the decompressional reactions : orthopyroxene+sillimanite+quartz=cordierite, orthopyroxene+sillimanite=cordierite+sapphirine, garnet+quartz=orthopyroxene+cordierite. Although the Forefinger Point granulites have undergone high strain deformation under peak metamorphic conditions, they experienced only low and local strain deformation after peak metamorphism. The post-peak-metamorphic structural evolution was characterized by the development of F_<n+1> open to gentle buckling folds, narrow shear zones and emplacement of pegmatite. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1072335X | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Geosciences 巻 7, p. 90-100, 発行日 1994-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |