ID | 56914 |
フルテキストURL | |
著者 |
Belay, Iyasu Getachew
The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
Tanaka, Ryoji
The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
ORCID
Kaken ID
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Kitagawa, Hiroshi
The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
ORCID
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Kobayashi, Katsura
The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
Nakamura, Eizo
The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
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抄録 | The geochemical variabilities in intraplate basalts (IB) from the West African passive margin (WAPM) region, have generally been employed to indicate the presence of recycled materials in an associated upwelling mantle plume. However, the absence of time-progressive linear hotspot tracks in WAPM-IB make it difficult to explain their genesis solely by the mantle plume hypothesis. Here, we show that the Sr–Nd–Hf–Pb isotopic variations in basalts from most of the WAPM-IB could have mainly attributed to the derivation from two types of fusible regions of the refertilized subcontinental lithospheric mantle (SCLM) and the sub-lithospheric mantle. The locations and magma genesis of WAPM-IB are strongly related to the distance from the Mesozoic rift axis and the structure of the rifted SCLM. The melting of the source region can possibly be attributed to small-scale mantle convection at the base of the SCLM without the involvement of a mantle plume.
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発行日 | 2019-07
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出版物タイトル |
Nature Communications
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巻 | 10巻
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号 | 1号
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出版者 | Springer Nature Publishing AG
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開始ページ | 3022
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ISSN | 20411723
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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著作権者 | © The Author(s) 2019
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論文のバージョン | publisher
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PubMed ID | |
DOI | |
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関連URL | isVersionOf https://doi.org/10.1038/s41467-019-10832-7
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ライセンス | http://creativecommons.org/licenses/by/4.0/
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Citation | Belay, I.G., Tanaka, R., Kitagawa, H. et al. Origin of ocean island basalts in the West African passive margin without mantle plume involvement. Nat Commun 10, 3022 (2019) doi:10.1038/s41467-019-10832-7
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助成機関名 |
日本学術振興会
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助成番号 | 16K05578
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