X‐ray computed tomography of deep‐sea clay as tools to detect rare earth elements and yttrium enrichment

DOI Web Site 参考文献28件 オープンアクセス
  • Yoichi Usui
    School of Geoscience and Civil Engineering, College of Science and Engineering Kanazawa University Ishikawa Japan
  • Kazutaka Yasukawa
    Frontier Research Center for Energy and Resources, School of Engineering The University of Tokyo Tokyo Japan
  • Koichi Iijima
    Submarine Resources Research Center, Research Institute for Marine Resources Utilization Japan Agency for Marine‐Earth Science and Technology (JAMSTEC) Kanagawa Japan
  • Hideaki Machiyama
    Submarine Resources Research Center, Research Institute for Marine Resources Utilization Japan Agency for Marine‐Earth Science and Technology (JAMSTEC) Kanagawa Japan
  • Yuji Ichiyama
    Department of Earth Science Chiba University Chiba Japan
  • Erika Tanaka
    Volcanoes and Earth's Interior Research Center, Research Institute for Marine Geodynamics Japan Agency for Marine‐Earth Science and Technology (JAMSTEC) Kanagawa Japan
  • Koichiro Fujinaga
    Department of Systems Innovation, School of Engineering The University of Tokyo Tokyo Japan

書誌事項

公開日
2023-01
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1111/iar.12503
公開者
Wiley

この論文をさがす

説明

<jats:title>Abstract</jats:title><jats:p>Pelagic clay that contains rare‐earth elements and yttrium (REY) at over 2000 ppm (termed “highly REY‐rich mud”) has been reported from a few areas in the western North Pacific Ocean through focused geochemical analyses. Those REY are carried by biogenic calcium phosphate, suggesting that the formation of highly REY‐rich mud involves enhanced biological productivity. However, detecting REY enrichment in sediment is time‐consuming, and the global significance of the formation of REY‐rich mud is still under debate. Here we perform x‐ray computed tomography (CT) analyses on cores recovered around Minamitorishima Island and demonstrate the positive correlation with highly REY‐rich mud and high CT numbers of the sediment. The variation of the CT number matches the wet bulk density. Further quantitative analyses using direct measurements of density and geochemistry suggest that a grain density increase and a porosity decrease due to the REY‐carrying biogenic apatite are essential to explain the high CT numbers in the REY‐enriched layer. While the chemical composition itself is of minor importance to elevate the CT numbers, our results suggest that x‐ray CT can be a proxy for highly REY‐rich mud.</jats:p>

収録刊行物

参考文献 (28)*注記

もっと見る

関連プロジェクト

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ