論文

査読有り
2018年

Uptake of porewater phosphate by REY-rich mud in the western North Pacific Ocean

GEOCHEMICAL JOURNAL
  • Akira Ijiri
  • ,
  • Kei Okamura
  • ,
  • Junichiro Ohta
  • ,
  • Yoshiro Nishio
  • ,
  • Yohei Hamada
  • ,
  • Koichi Iijima
  • ,
  • Fumio Inagaki

52
4
開始ページ
373
終了ページ
378
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2343/geochemj.2.0522
出版者・発行元
GEOCHEMICAL SOC JAPAN

Deep-sea mud extremely enriched in rare-earth elements and yttrium (together called REY) has been discovered around Minamitorishima Island, in the western North Pacific. The REY-rich mud was previously observed to contain abundant phillipsite and biogenic calcium phosphate. We analyzed the chemical compositions of porewater in a sediment core containing REY-rich mud and observed a decrease of dissolved phosphate (PO43-) from similar to 1 mu M to similar to 0.5 mu M around the REY-rich mud layer. The presence of dissolved nitrate + nitrite throughout the cored depth indicated oxic sediment conditions. In the REY-rich mud, PO43- was presumed to be adsorbed onto the surfaces of minerals such as phillipsite. Our results support that oxic pelagic clay containing phillipsite can be a sink for PO43-. Concentrations of REY in porewater were below the detection limit.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.2343/geochemj.2.0522
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000441846300008&DestApp=WOS_CPL

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