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Influence of dam reservoir on deep marine sedimentological environment : An example of the Kumano Trough, central Japan
http://hdl.handle.net/10748/7695
http://hdl.handle.net/10748/76955fa27584-f2f0-435e-b82b-11db0823bb99
名前 / ファイル | ライセンス | アクション |
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20005-051-015.pdf (697.8 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2016-06-21 | |||||
タイトル | ||||||
タイトル | Influence of dam reservoir on deep marine sedimentological environment : An example of the Kumano Trough, central Japan | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Pb-210 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | mass accumulation rate | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | hemipelagic deep marine | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | dam reservoir | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Kumano Trough | |||||
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 | |||||
著者 |
Shirai, Masaaki
× Shirai, Masaaki× Omura, Akiko |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Sedimentation rate (mass accumulation rate; MAR) of surface hemipelagic sediments in the Kumano Trough, a forearc basin approximately 2000 m deep off the eastern Kii Peninsula, central Japan, was estimated from excess Pb-210 radioactivity profile and dry bulk density of the core sample. The estimated excess Pb-210 radioactivity profile was subdivided into three segments. The top segment was inferred to be affected by biological mixing in the surface mixing layer (SML). In contrast, a difference between segment-2 and segment-3 would reflect decease in MAR. With a simple model, the influence of the biological mixing and boundary age between segment-2 and segment-3 were estimated. The relationship between decreasing age of hemipelagic sediment MAR in the Kumano Trough (1950s) and dam construction age (1950s–1960s) was reasonable. Additionally, the relationship was supported by similarity in sediment grain size of dam reservoir and hemipelagic environment. Consequently, the construction of dams probably influences the deep marine hemipelagic environment of the forearc basin 2000 m below sea level. | |||||
書誌情報 |
Geographical Reports of Tokyo Metropolitan University 号 51, p. 119-126, 発行日 2016 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 03868710 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00200173 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | Department of Geography, Tokyo Metropolitan University | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | postprint |