The 3He/4He ratio in a clay from the K-T boundary,Hokkaido, Japan

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概要

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• We measured the He content and the ^3He/^4He ratio of a K-T boundary clay from Hokkaido. If some meteoritic debris which escaped total melting or evaporation at the K-T event remains in the clay, it may be possible to observe some ^3He in it. However, we could determine only the upper limits of the ^3He/^4He ratois (<6.2×10^<-6> for a bulk sample) because of the small amount of ^3He. Three alternatives are considered to explain the result.

• 国立極地研究所の論文

著者

• Ozima Minoru

  Geophysical Institute Faculty Of Science University Of Tokyo

• Amari Sachiko

  Geophysical Institute, University of Tokyo

• Hamano Yozo

  Earthquake Research Institute University Of Tokyo

• Amari Sachiko

  Geophysical Institute Faculty Of Science University Of Tokyo

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