K-Ar Age of Yamato Meteorite, Yamato-74190-01(L)

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概要

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• Preliminary measurements have been carried out on the isotopic compositions and contents of helium, neon and argon in Yamato-74190-01 (L). K-Ar age and exposure ages on the meteorite have been calculated as follows : K-Ar age (∿2.1 b. y.), exposure ages (24 and 22 m. y. in terms of ^3(He) and ^<21>(Ne) contents respectively). From the isotopic correlation diagram for neon and the isotopic ratio, ^<36>(Ar)/^<38>(Ar), it has been suggested that this meteorite contains almost the same quantity of trapped rare gases as cosmogenic ones.

• 国立極地研究所の論文

著者

• Okano Jun

  Institute Of Geological Sciences College Of General Education Osaka University

• Kamaguchi Akeji

  Institute of Geological Sciences, College of General Education, Osaka University

• Kamaguchi Akeji

  Institute Of Geological Sciences College Of General Education Osaka University

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