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Petrography of a discordant metabasite from Skallen, Lutzow-Holmbukta, East Antarctica
https://nipr.repo.nii.ac.jp/records/1474
https://nipr.repo.nii.ac.jp/records/147457ac25f3-09e2-4039-a235-dee5bfe5ee2c
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000012107 (2.5 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 1983-10-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Petrography of a discordant metabasite from Skallen, Lutzow-Holmbukta, 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 | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Yoshida, Masaru
× Yoshida, Masaru× Aikawa, Nobuyuki |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Geosciences, Faculty of Science, Osaka City University | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Geosciences, Faculty of Science, Osaka City University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | A discordant metabasite from Skallen is an olivine tholeiite resembling petrochemically with some of the Proterozoic Amundsen dikes of Enderby Land. Field occurrence, mineral association, and microstructure including zoning structure of minerals are not incompatible with the polymetamorphic interpretation of the area presented by YOSHIDA et al. (submitted to Antarctic Earth Science, 1982), and indicate that the rock intruded in synchronous with or earlier than possibly the second and probably the first tectono-metamorphic event of YOSHIDA et al. Microprobe analyses and compositional zoning of constituent minerals of the metabasite are presented and some temperature and pressure values are calculated utilizing five different geothermometers and a geobarometer. Among calculated values, 693±3℃, 768±3℃, and 823±22℃ obtained by averaging temperatures after margin pairs of garnet-clinopyroxene (ELLIS and GREEN : Contrib. Mineral. Petrol., 71,13,1979) and garnet-biotite (THOMPSON : Am. J. Sci., 276,425,1976) geothermometers, after core pairs of two pyroxenes (WOOD and BANNO : Contrib. Mineral. Petrol., 42,109,1973) and garnet-clinopyroxene geothermometers, and averaging highest temperatures after core pairs of two pyroxenes and garnet-clinopyroxene geothermometers are considered possible to be explained either by the polymetamorphic or by the monometamorphic history of the discordant metabasite. It is stressed that the peak of a dominant metamorphism is considered to have reached the temperature much higher than 823℃ whichever the metamorphic history might have been. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 28, p. 144-165, 発行日 1983-10 |