40Ar-39Ar analyses of Juvinas fragments
スポンサーリンク
概要
- 論文の詳細を見る
Three fragments of the Juvinas (eucrite) taken from the main mass with a size of about 30cm were analyzed by the ^<40>Ar-^<39>Ar method in order to examine differences of secondary thermal effects. The brecciated matrix shows a scattered pattern in the ^<40>Ar-^<39>Ar age spectrum, indicating excess ^<40>Ar in the higher temperature fractions. Two other fragments show no definite plateau ages but indicate similar age patterns. A probable disturbance event (s) around 4-4.1 Ga is indicated in the 975-1050℃ fractions. Thus, Juvinas shows evidence of secondary thermal events, probably due to impacts.
- 国立極地研究所の論文
著者
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Kaneoka Ichiro
Earthquake Research Institute University Of Tokyo
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Nagao Keisuke
Institute For Study Of Earth's Interior Okayama University
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Yamaguchi Akira
Mineralogical Institute Graduate School Of Sciences University Of Tokyo
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Yamaguchi Akira
Mineralogical Institute Faculty Of Science University Of Tokyo
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Kaneoka Ichiro
Earthquake Research Institute The University Of Tokyo
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Kaneoka Ichiro
Earthquake Research Institute,University of Tokyo
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