Sulfur chemistry with time-varying oxygen abundance during Solar System formation

Matthew A. Pasek, John A. Milsom, Fred J. Ciesla, Dante S. Lauretta, Christopher M. Sharp, Jonathan I. Lunine

Research output: Contribution to journalArticlepeer-review

83 Scopus citations


Chemical models of solar nebula chemistry are presented which show the influence of progressive water depletion from the inner solar nebula. The main focus of this work is the equilibrium distribution of S resulting from this process. Under canonical solar nebula conditions, H2S is the dominant S-bearing species in the gas phase and troilite (FeS) is the primary reservoir for S after condensation. As water vapor diffuses out to its condensation front, the equilibrium distribution of S changes significantly. With the removal of water vapor, SiS becomes the most abundant S-bearing gas and MgS and CaS compete with FeS as the main sulfide reservoir. These results allow us to argue that some of the minerals in the enstatite chondrites formed through the heterogeneities associated with the nebular ice condensation front, and that the sulfur abundance in Jupiter reflects a depletion in H2S that is the result of inner nebula sulfur chemistry under varying oxygen abundance.

Original languageEnglish (US)
Pages (from-to)1-14
Number of pages14
Issue number1
StatePublished - May 2005


  • Cosmochemistry
  • Jupiter
  • Meteorites
  • Solar nebula

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'Sulfur chemistry with time-varying oxygen abundance during Solar System formation'. Together they form a unique fingerprint.

Cite this