Ordinary Chondrite Formation from two Components: Implied Connection to Planet Mercury

Details Ordinary Chondrite Formation from two Components: Implied Connection to Planet Mercury Ordinary Chondrite Formation from two Components: Implied Connection to Planet Mercury

2004-05-15

arxiv.org/abs/astro-ph/0405298v1

Astronomy and Astrophysics

Astrophysics

Submitted to the Proceedings of the Royal Society of London

Scientific paper

Major element fractionation among chondrites has been discussed for decades as ratios relative to Si or Mg. Expressing ratios relative to Fe leads to a new relationship admitting the possibility that ordinary chondrite meteorites are derived from two components: one is a relatively undifferentiated, primitive component, oxidized like the CI or C1 chondrites; the other is a somewhat differentiated, planetary component, with oxidation state like the reduced enstatite chondrites. Such a picture would seem to explain for the ordinary chondrites, their major element compositions, their intermediate states of oxidation, and their ubiquitous deficiencies of refractory siderophile elements. I suggest that the planetary component of ordinary chondrite formation consists of planet Mercury's missing complement of elements.

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