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Sr-Nd-Pb isotope systematics of fine sediments from the modern rivers in SW Japan : Implications for sediment provenance of the Northwest Pacific
https://tokushima-u.repo.nii.ac.jp/records/2010121
https://tokushima-u.repo.nii.ac.jp/records/2010121dc395e33-77fb-4e09-a2fa-2cef39f9f1ef
| 名前 / ファイル | ライセンス | アクション |
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jaesx_3_100029.pdf (6.12 MB)
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| Item type | 文献 / Documents(1) | |||||||||||||||||||||||
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| 公開日 | 2022-08-04 | |||||||||||||||||||||||
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| アクセス権 | open access | |||||||||||||||||||||||
| 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 | |||||||||||||||||||||||
| 出版社版DOI | ||||||||||||||||||||||||
| 関連識別子 | https://doi.org/10.1016/j.jaesx.2020.100029 | |||||||||||||||||||||||
| 関連名称 | 10.1016/j.jaesx.2020.100029 | |||||||||||||||||||||||
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| 出版タイプ | VoR | |||||||||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||||||||||||
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| タイトル | Sr-Nd-Pb isotope systematics of fine sediments from the modern rivers in SW Japan : Implications for sediment provenance of the Northwest Pacific | |||||||||||||||||||||||
| 著者 |
齋藤, 有
× 齋藤, 有
WEKO
1479
× タニミズ, マサハル
× イシカワ, ツヨシ
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| 抄録 | ||||||||||||||||||||||||
| 内容記述 | As reference data for comprehensive provenance analyses of deep-sea sediments in the Northwest Pacific region, we present Sr-Nd-Pb isotopic compositions of fine sediments sampled from 48 rivers in southwest Japan. Sr-Nd-Pb isotope ratios are reliable indicators of sediment sources. Although isotopic data of fine sediments in Chinese arid regions, known to be Asian dust sources, are abundant, comparable data from southwest Japan are scarce, even though southwest Japan, owing to its tectonic activity, is a major sediment source to the Northwest Pacific. Sr-Nd-Pb isotope ratios of our riverine fine sediment samples vary greatly (87Sr/86Sr, 0.707–0.724; 143Nd/144Nd, 0.5120–0.5129; 206Pb/204Pb, 18.16–18.89; 207Pb/204Pb, 15.55–15.66; and 206Pb/204Pb, 38.13–39.09), and these variations are clearly dependent on the principal geology of each river's watershed. These results indicate that these isotope ratios can be effectively used to discriminate the geological sources of the sediments. Sediments from watersheds dominated by Quaternary volcanic rocks have the lowest 87Sr/86Sr and Pb isotope ratios and the highest 143Nd/144Nd ratios, whereas sediments from watersheds dominated by accretionary sedimentary rocks generally have high 87Sr/86Sr and Pb isotope ratios and low 143Nd/144Nd ratios, but their specific values vary depending on the age and geographic location of the rocks. The isotope compositions of sediments from watersheds with exposed Cretaceous granitic and metamorphic rocks are also distinctive. Comparison between the isotope ratios of Japanese river sediments and the Northwest Pacific seafloor sediments suggests the importance of sediment transport by the Kuroshio Current to the Northwest Pacific. | |||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||
| 主題 | Sediment provenance | |||||||||||||||||||||||
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| 主題 | River sediment | |||||||||||||||||||||||
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| 主題 | Mud | |||||||||||||||||||||||
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| 主題 | Asian dust | |||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||
| 主題 | Kuroshio Current | |||||||||||||||||||||||
| キーワード | ||||||||||||||||||||||||
| 主題 | Southwest Japan | |||||||||||||||||||||||
| 書誌情報 |
en : Journal of Asian Earth Sciences: X 巻 3, p. 100029, 発行日 2020-05-03 |
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| 収録物識別子タイプ | ISSN | |||||||||||||||||||||||
| 収録物識別子 | 25900560 | |||||||||||||||||||||||
| 出版者 | ||||||||||||||||||||||||
| 出版者 | Elsevier | |||||||||||||||||||||||
| 権利情報 | ||||||||||||||||||||||||
| 権利情報 | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | |||||||||||||||||||||||
| EID | ||||||||||||||||||||||||
| 識別子 | 387731 | |||||||||||||||||||||||
| 言語 | ||||||||||||||||||||||||
| 言語 | eng | |||||||||||||||||||||||
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齋藤, 有, タニミズ, マサハル, イシカワ, ツヨシ, 2020, Sr-Nd-Pb isotope systematics of fine sediments from the modern rivers in SW Japan : Implications for sediment provenance of the Northwest Pacific: Elsevier, 100029– p.
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