Magnetite in CI Carbonaceous Meteorites: Origin by Aqueous Activity on a Planetesimal Surface.
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.
Kerridge
J F
JF
Mackay
A L
AL
Boynton
W V
WV