Molecular cloud origin for the oxygen isotope heterogeneity in the solar system.

@article{Yurimoto2004MolecularCO,
  title={Molecular cloud origin for the oxygen isotope heterogeneity in the solar system.},
  author={Hisayoshi Yurimoto and Kiyoshi Kuramoto},
  journal={Science},
  year={2004},
  volume={305 5691},
  pages={1763-6}
}
Meteorites and their components have anomalous oxygen isotopic compositions characterized by large variations in 18O/16O and 17O/16O ratios. On the basis of recent observations of star-forming regions and models of accreting protoplanetary disks, we suggest that these variations may originate in a parent molecular cloud by ultraviolet photodissociation processes. Materials with anomalous isotopic compositions were then transported into the solar nebula by icy dust grains during the collapse of… CONTINUE READING

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