Hostname: page-component-6bf8c574d5-n2sc8 Total loading time: 0 Render date: 2025-03-09T16:35:52.091Z Has data issue: false hasContentIssue false
  • English
  • Français

Observation of High 3He/4He Ratio in Ocean Sediments — Evidence for Extraterrestrial Material Contamination

Published online by Cambridge University Press:  12 April 2016

M. Ozima ,
M. Takayanagi ,
S. Zashu  and
S. Amari
M. Ozima
Affiliation:
Geophysical Institute, University of Tokyo, Tokyo 113, Japan
M. Takayanagi
Affiliation:
Geophysical Institute, University of Tokyo, Tokyo 113, Japan
S. Zashu
Affiliation:
Geophysical Institute, University of Tokyo, Tokyo 113, Japan
S. Amari
Affiliation:
Geophysical Institute, University of Tokyo, Tokyo 113, Japan

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Occurrence of anomalously high 3He/4He ratio (> 5 × 10−5) is rather common in the Pacific deep sea sediment. The 3He/4He ratio correlates well with the 3He content, whereas the 3He content shows approximate inverse relation with the sedimentation rate. Input of stratospheric dust of about 1 ppm or less which corresponds to about 2000 ton/y fallout rate can explain the above observation.

Type
III. Interplanetary Dust: Laboratory Studies
Information
International Astronomical Union Colloquium , Volume 85: Properties and Interactions of Interplanetary Dust , 1985 , pp. 185 - 189
Copyright
Copyright © Reidel 1985

References

(1.) Merrihue, C., Annals N.Y. Acad. Sci, 119, Art. 1, 351–367 (1964).CrossRefGoogle Scholar
(2.) Krylov, A.Ya., Mamyrin, B.A., Silin, Yu.I. and Khabarin, L.V., Geochemistry International, 10, 202–205 (1973).Google Scholar
(3.) Initial Report of the Deep Sea Drilling Project, 43, 19–321 (1979).Google Scholar
(4.) Ibid, 43, 323-391 (1979).Google Scholar
(5.) Kobayashi, K., Tonouchi, S., Furuta, T. and Watanabe, M., Bull. Ocean Res. Inst. Univ. of Tokyo, No. 13, 1–148 (1980).Google Scholar
(6.) Preliminary Report of the Hakuho Maru Cruise KH80-3, p209 (1981).Google Scholar
(7.) Ozima, M., Zashu, S. and Nitoh, O., Geochim. Cosmochim. Acta, 47, 2217–2224 (1983).CrossRefGoogle Scholar
(8.) Ozima, M. and Zashu, S., Science, 219, 1067–1068 (1983).CrossRefGoogle Scholar
(9.) Kaneoka, I. and Takaoka, N., Earth Planet. Sci. Lett. 39, 382–386 (1978).CrossRefGoogle Scholar
(10.) Ozima, M. and Podosek, F.A., Noble gas geochemistry, p367, Cambridge Univ. Press (1983).Google Scholar
(11.) Tolstikhin, I.N., in Terrestrial Rare Gases, (Ed. Alexander, E.C. Jr and Ozima, M.) 33–62 (Japan Science Soc. Press., 1978).Google Scholar
(12.) Posodek, F.A., Honda, M. and Ozima, M., Geochim. Cosmochim. Acta, 44, 1875–1884 (1980).Google Scholar
(13.) Hughes, D.W., in Cosmic dust (Ed. McDonnell, J.A.M.), 123–185 (Wiley, 1978).Google Scholar
(14.) Rajan, R.S., Brownlee, D.E., Tomandl, D., Hodge, R.W., Farrar., H.IV. and Britten, R.A., Nature, 267, 133–135 (1977).Google Scholar