Sulfur isotopic data from the Cretaceous/Tertiary boundary sediments in the eastern Hokkaido, Japan

Y. Kajiwara, K. Kaiho

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

At the Cretaceous/Tertiary (K/T) boundary within the continuous marine sedimentary sequence of Kawaruppu section in the eastern Hokkaido, a temporary and drastic increase in 34S/32S ratio of whole rock sulfide has been recognized. Pyrite is the major sulfur carrier in many of the present samples. It is remarkable that the sedimentary sequence records a sharp and drastic increase in 34S/32S ratio just at the bottom of the boundary claystone with a rather gradual, upward re-equilibration trend from the boundary. This is fairly analogous in variation pattern to the palynological (pollen/spore ratio) profiles reported from some K/T boundary sections. -from Authors

Original languageEnglish
Pages (from-to)69-73
Number of pages5
JournalAnnual Report - University of Tsukuba, Institute of Geoscience
Volume17
Publication statusPublished - 1991 Jan 1

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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