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パラオ海溝の深海6500mに存在する石灰岩体の溶解
https://doi.org/10.18999/sumrua.24.73
7ffcdba3-49bd-43a0-aee9-30f09742bca0
名前 / ファイル | ライセンス | アクション | |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2014-06-09 | |||||
タイトル | ||||||
タイトル | パラオ海溝の深海6500mに存在する石灰岩体の溶解 | |||||
その他のタイトル | ||||||
その他のタイトル | Dissolution of limestone block located at 6500m depth of the Palau Trench | |||||
著者 |
坪井, 辰哉
× 坪井, 辰哉× 和田, 秀樹× 中村, 俊夫× 松崎, 浩之× 大辻, 菜穂× 藤岡, 換太郎× 小栗, 一将× 北里, 洋× Tsuboi, Tatsuya× Wada, Hideki× Nakamura, Toshio× Matsuzaki, Hiroyuki× Otsuji, Naho× Fujioka, Kantaro× Oguri, Kazumasa× Kitazato, Hiroshi |
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キーワード | ||||||
主題Scheme | Other | |||||
主題 | Palau Trench | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Deep-water Limestone | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | DIC | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ∆14C | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sr isotopic age | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | パラオ海溝 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 深海石灰岩 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 溶存無機炭素 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ∆14C | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sr年代 | |||||
抄録 | ||||||
内容記述 | The large limestone block was found at 6500m depth of Palau Trench in 1993. The Sr isotopic age of this limestone shows the accumulation age of late Miocene. Using the submersible Shinkai 6500, we report the 14C density of seawater collected around the large limestone block on the landward slope of the Palau Trench, at around 6500m depth, which is significantly deeper than the carbonate compensation depth (CCD). AMS-14C measurements of dissolved inorganic carbon (DIC) extracted revealed values as low as -295‰. It is suggested that this value is predominantly caused by the dissolution from the limestone block.1993 年の“しんかい6500'潜航の際に、パラオ毎溝陸側斜面の水深6500mの海底に巨大な石灰岩岩体を発見した。この石灰岩体は、炭酸塩補償深度(CCD)以深に分布している。Sr同位体比年代曲線による石灰岩の堆積年代は,およそ後期中新世であると推定される。また,石灰岩露頭近傍の海水の溶存無機炭素のAMS-14C測定の結果は、∆14C値で-295‰を示した。この値は、深海の海水の14C濃度よりも低い。この低い14C濃度の原因は、CCD以深の環境における石灰岩からの炭酸塩の溶解によって、石灰岩露頭近傍の海水に14Cを含まない炭酸イオンが供給されることによるものであり、局所的ではあるが、深海の炭素循環の新たな供給源の実態を示すものである。 | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | 名古屋大学年代測定総合研究センターシンポジウム報告 | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
出版者 | 名古屋大学年代測定資料研究センター | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.18999/sumrua.24.73 | |||||
ID登録タイプ | JaLC | |||||
書誌情報 |
名古屋大学加速器質量分析計業績報告書 巻 24, p. 73-77, 発行日 2013-03 |
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著者版フラグ | ||||||
値 | publisher |