Helium isotope ratios of pore gases in deep-sea sediments, Leg 128

Y. Sano, M. Sakamoto, J. Ishibashi, H. Wakita, R. Matsumoto

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Helium in the samples can be explained by the mixing between atmospheric helium dissolved in bottom water of the Japan Sea and crustal helium in the sediment. The sedimentary helium is enriched in mantle-derived 3He compared with those from the Japan Trench and the Nankai Trough. This suggests that the basement of the Japan Sea has relatively large remnants of mantle-derived helium compared with that of the Pacific. Major chemical compositions of the samples are methane and nitrogen. There is a positive correlation between methane content and helium content corrected for air component. -from Authors

Original languageEnglish
Pages (from-to)747-751
Number of pages5
JournalUnknown Journal
Publication statusPublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


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