Light noble gases in the geological mass extinction layers in Hungary

Chikako Nishimura, Takuya Matsumoto, Jun Ichi Matsuda, Csaba H. Detre, György Don, Tibor Braun

Research output: Contribution to journalArticle


The elemental abundance and isotopic ratio of He and Ar have been measured in the sedimentary rock samples of Permian (P) - Triassic (T) and Triassic (T) - Jurassic (J) boundary layers in Hungary. Low 3He/4He and high 40Ar/36Ar ratios as compared to the air values have been found, suggesting that radiogenic components are predominant in these layers. The 38Ar/36Ar ratios are also atmospheric. Thus, it is likely that all these isotopic ratios of noble gases are not indicating an extraterrestrial impact. However, there seems to be pulse increases of 3He concentration at the P- T boundary compared to other P and T samples. This still maintains the possibility that an extraterrestrial input is the cause for the mass extinction at the P-T boundary.

Original languageEnglish
Pages (from-to)1180-1185
Number of pages6
JournalRevista de Chimie
Issue number11
Publication statusPublished - Nov 2008


  • Ar/Ar ratios
  • Noble gases
  • Radiogenic components
  • Sedimentary rock

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science (miscellaneous)
  • Engineering(all)
  • Surfaces, Coatings and Films
  • Materials Chemistry

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  • Cite this

    Nishimura, C., Matsumoto, T., Matsuda, J. I., Detre, C. H., Don, G., & Braun, T. (2008). Light noble gases in the geological mass extinction layers in Hungary. Revista de Chimie, 59(11), 1180-1185.