Rare gas studies of twenty-four antarctic chondrites
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概要
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The concentrations of rare gases and isotopic compositions of He, Ne and Ar were determined in twenty-four antarctic meteorites by rare gas mass spectrometry. No significant difference is found in cosmic-ray irradiation and thermal histories between antarctic and non-antarctic chondrites, except a discovery of extremely long irradiation age of 92 m.y. for the Yamato-74035 (L6) chondrite. The Yamato-75028 chondrite contains high concentrations of solartype rare gases. On the basis of rare gas data, two groups of paired meteorites were identified; they are Yamato-75097,-75102,-75108 and -75271,and Allan Hills-77015,-77167 and -77260.
- 国立極地研究所の論文
著者
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Takaoka Nobuo
Department Of Earth And Planetary Science Faculty Of Science Kyushu University
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Nagao Keisuke
Okayama University Of Science
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Nagao Keisuke
Department Of Applied Physics Faculty Of Science Okayama University Of Science
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Saito Kazuo
Department Of Earth And Environmental Sciences Yamagata University
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Ohba Yoshio
Department of Earth Sciences, Faculty of Science, Yamagata University
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Saito Kazuo
Department Chemistry Faculty Of Science Tohoku University
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Ohba Yoshio
Department Of Earth Sciences Faculty Of Science Yamagata University
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Takaoka Nobuo
Department of Earth Sciences, Faculty of Science,Yamagata University
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