Magnetite in CI Carbonaceous Meteorites: Origin by Aqueous Activity on a Planetesimal Surface

@article{Kerridge1979MagnetiteIC,
  title={Magnetite in CI Carbonaceous Meteorites: Origin by Aqueous Activity on a Planetesimal Surface},
  author={John F. Kerridge and Alan Lindsay Mackay and William V. Boynton},
  journal={Science},
  year={1979},
  volume={205},
  pages={395 - 397}
}
The composition and morphology of magnetite in CI carbonaceous meteorites appear incompatible with a nebular origin. Mineralization on the meteorite parent body is a more plausible mode of formation. The iodine-xenon age of this material therefore dates an episode of secondary mineralization on a planetesimal rather than the epoch of condensation in the primitive solar nebula. 
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