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Petrology, geochemistry, and geochronology of plutonic rocks from the present Southwest Indian Ridge: Implications for dropstone distribution in the Indian Ocean
https://nipr.repo.nii.ac.jp/records/16832
https://nipr.repo.nii.ac.jp/records/16832ed432269-90a4-45ce-a4c7-2f2177948dd6
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2021-12-24 | |||||
タイトル | ||||||
タイトル | Petrology, geochemistry, and geochronology of plutonic rocks from the present Southwest Indian Ridge: Implications for dropstone distribution in the Indian Ocean | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Petrology, geochemistry, and geochronology of plutonic rocks from the present Southwest Indian Ridge: Implications for dropstone distribution in the Indian Ocean | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Southwest Indian Ridge | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Petrology | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Southern Ocean | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Orogeny | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Dropstones | |||||
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 | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Sato, Hiroshi
× Sato, Hiroshi× Machida, Shiki× Senda, Ryoko× Sato, Keiko× Kumagai, Hidenori× Hyodo, Hironobu× Yoneda, Shigekazu× Kato, Yasuhiro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We recovered sedimentary and plutonic rocks from the off-ridge portion of the Southwest Indian Ridge (37°00.02ʹ E, 44°49.73ʹ S, 2165 m deep). The petrography, geochemistry, and geochronology of these plutonic rocks were analyzed. Ar–Ar dating of biotite in the plutonic rocks yielded early Paleozoic ages of approximately 475 and 490 Ma, indicating that these rocks are likely related to Antarctic orogenies during the late Neoproterozoic to early Paleozoic. In addition, the samples exhibited trace element compositions and low initial εNd values (−8 and −12) similar to those of rocks from western Dronning Maud Land and the Transantarctic Mountains, Antarctica. Such similarities suggest that these plutonic rocks from the off-ridge portion of the Southwest Indian ridge were derived from western Dronning Maud Land or the Transantarctic Mountains and deposited by melting icebergs as dropstones. | |||||
書誌情報 |
en : Polar Science 巻 29, p. 100725, 発行日 2021-09 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.polar.2021.100725 | |||||
関連名称 | 10.1016/j.polar.2021.100725 |