@article{oai:nipr.repo.nii.ac.jp:00001057,
 author = {Nakamura, Noboru},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Dec},
 note = {P(論文), 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.},
 pages = {219--226},
 title = {A Preliminary Isotopic Study on Four Yamato Diogenites-Sm-Nd and Rb-Sr Systematics-},
 volume = {15},
 year = {1979}
}