論文

査読有り
2016年7月

Bolide impact triggered the Late Triassic extinction event in equatorial Panthalassa

SCIENTIFIC REPORTS
  • Tetsuji Onoue
  • ,
  • Honami Sato
  • ,
  • Daisuke Yamashita
  • ,
  • Minoru Ikehara
  • ,
  • Kazutaka Yasukawa
  • ,
  • Koichiro Fujinaga
  • ,
  • Yasuhiro Kato
  • ,
  • Atsushi Matsuoka

6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/srep29609
出版者・発行元
NATURE PUBLISHING GROUP

Extinctions within major pelagic groups (e.g., radiolarians and conodonts) occurred in a stepwise fashion during the last 15 Myr of the Triassic. Although a marked decline in the diversity of pelagic faunas began at the end of the middle Norian, the cause of the middle Norian extinction is uncertain. Here we show a possible link between the end-middle Norian radiolarian extinction and a bolide impact. Two palaeoenvironmental events occurred during the initial phase of the radiolarian extinction interval: (1) a post-impact shutdown of primary and biogenic silica production within a time span of 104-105 yr, and (2) a sustained reduction in the sinking flux of radiolarian silica for similar to 0.3 Myr after the impact. The catastrophic collapse of the pelagic ecosystem at this time was probably the dominant factor responsible for the end-middle Norian conodont extinction.

Web of Science ® 被引用回数 : 12

リンク情報
DOI
https://doi.org/10.1038/srep29609
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000379769800001&DestApp=WOS_CPL

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