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Geochronological study of post-metamorphic granite from Kasumi Rock, Lutzow-Holm Complex, East Antarctica
https://doi.org/10.15094/00003135
https://doi.org/10.15094/00003135162ee687-90e7-4375-9ccb-fb1c5274db30
名前 / ファイル | ライセンス | アクション |
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KJ00000712287 (1.3 MB)
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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 | |||||
タイトル | ||||||
タイトル | Geochronological study of post-metamorphic granite from Kasumi Rock, Lutzow-Holm Complex, East Antarctica | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Rb-Sr whole rock isochron, Sm-Nd whole rock isochron, post-metamorphic granite, Kasumi Rock, Lutzow-Holm Complex | |||||
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 | 10.15094/00003135 | |||||
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 | Geochronological study of post-metamorphic granite from Kasumi Rock, Lutzow-Holm Complex, East Antarctica | |||||
著者名(英) |
Ajishi,Hideaki
× Ajishi,Hideaki× Kawano,Yoshinobu× Kawakami,Tetsuo× Ikeda,Takeshi |
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著者所属(英) | ||||||
en | ||||||
Graduate School of Education, Saga University/Faculty of Culture and Education, Saga University/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 | Kasumi Rock is situated in the amphibolite-facies metamorphic zone in the Lutzow-Holm Complex, East Antarctica. In this area, granitic rocks occur as steeply dipping linear dykes with sharp intrusive contacts, and cross-cut the foliation of layered metamorphic rocks. A geochronological study of this post-metamorphic granite (PMG) has been performed. An Rb-Sr whole rock isochron for five granitic rocks defines an age of 492.1+-23.4 Ma with an initial ^87Sr/^86Sr ratio of 0.70535+-0.00027 (MSWD=0.08). In the Sm-Nd isochron diagram, four rock samples yield an age of 498.4+-90.6 Ma with an initial ^143Nd/^144Nd ratio of 0.511782+-0.000101 (MSWD=0.05). The whole rock isochron ages and mode of occurrence suggest that the Kasumi PMGs were intruded after regional cooling of the area, and probably affected local reequilibrium for isotopic systems of surrounding metamorphic rocks. The PMGs might have been slowly cooled and crystallized after the intrusion. The Kasumi PMGs have no genetic relation to the Oku-iwa PMGs as regards Rb-Sr and Sm-Nd isotopic systems, because the initial ratios of both PMGs are quite different from each other. This is interpreted to mean that the PMGs in the Lutzow-Holm Complex were originated from different source materials or had different chemical reaction processes with crustal materials. | |||||
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 17, p. 35-44, 発行日 2004-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |