Oxygen isotopes in R-chondrite magnetite and olivine : Links between R chondrites and ordinary chondrites

@inproceedings{James2000OxygenII,
  title={Oxygen isotopes in R-chondrite magnetite and olivine : Links between R chondrites and ordinary chondrites},
  author={James and P................... and Greenwood and ALAN and {\'E}. and Rubin and John and T. and Wasson},
  year={2000}
}
Ion-microprobe studies yield DO (5dO 2 0.52z dO) values in magnetite from the Rumurti chondrite (RC) PCA91241 (which is paired with PCA91002) of 13.1 to13.9‰, slightly higher than that in O from whole-rock R samples. Despite DO values in whole-rock RCs that are much (by ca. 1.6‰) higher than in whole-rock LL chondrites, the DO in R magnetite is much lower (by ca. 2‰) than the values ( 14 to 17‰) from LL3 Semarkona and Ngawi (Choi et al., 1998). The dO values in PCA magnetite ( 215 to 210‰) are… CONTINUE READING

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