論文

査読有り
2016年7月

Tracking the spatiotemporal variations of statistically independent components involving enrichment of rare-earth elements in deep-sea sediments

SCIENTIFIC REPORTS
  • Kazutaka Yasukawa
  • ,
  • Kentaro Nakamura
  • ,
  • Koichiro Fujinaga
  • ,
  • Hikaru Iwamori
  • ,
  • Yasuhiro Kato

6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/srep29603
出版者・発行元
NATURE PUBLISHING GROUP

Deep-sea sediments have attracted much attention as a promising resource for rare-earth elements and yttrium (REY). In this study, we show statistically independent components characterising REY-enrichment in the abyssal ocean that are decoded by Independent Component Analysis of a multielemental dataset of 3,968 bulk sediment samples from 101 sites in the Pacific and Indian oceans. This study for the first time reconstructs the spatiotemporal variations of the geochemical signatures, including hydrothermal, hydrogenous, and biogenic calcium phosphate components that were closely involved in the formation of REY-rich mud over the past 65 million years. An underlying key factor of significant REY-enrichment is a sufficiently low sedimentation rate that enables the mud to accumulate REY from seawater. In the early Cenozoic, a remarkably small supply of aeolian dust, compared with any other time and region, facilitated the deposition of very high-grade REY-rich mud in the South Pacific. This indicates an important link between the genesis of the seafloor mineral resources and Earth's dynamic phenomena such as climate change and plate tectonics.

Web of Science ® 被引用回数 : 22

リンク情報
DOI
https://doi.org/10.1038/srep29603
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000380029200001&DestApp=WOS_CPL

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