A Preliminary Isotopic Study on Four Yamato Diogenites-Sm-Nd and Rb-Sr Systematics-
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概要
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Precise Sm and Nd isotopic measurements have been performed on whole rocks of four unique Yamato diogenites (Yamato-74013,-74037,-74097 and -74136). Although the observed ^<143>(Nd)/^<144>(Nd) ratios show some variations, ranging from 0.5126 to 0.5146,the data do not define an isochron. Rb-Sr measurements for mineral separates and whole rocks from the meteorites also do not yield a definite age information for these meteorites. The present results suggest that multiple young (possibly younger than 2.0 b. y.) metamorphic events may be responsible for the disturbance of the Rb-Sr and Sm-Nd systems of the meteorites.
- 国立極地研究所の論文
著者
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Nakamura Noboru
Department Of Earth & Planetary Sciences Faculty Of Science And Division Of The Nature Of The Ea
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Nakamura Noboru
Department of Earth Sciences, Faculty of Science,Kobe University
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