Volcanic Origin of Disulfur Monoxide (S2O) on Io

Mikhail Yu Zolotov, Bruce Fegley

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

We use chemical equilibrium calculations to model S2O formation by high temperature thermochemical reactions in volcanic gases on Io. The calculations predict formation of 1-6% S2O gas at observed hot spot temperatures in SO2-S2gas mixtures at pressures of 1-100 bars in volcanoes on Io. The S2O abundance increases with increasing pressure (up to ~6% at 100 bars) and is relatively insensitive to temperature and the bulk O/S ratio over wide ranges. Condensation of volcanic S2O provides a plausible explanation for the solid S2O that has been suggested to be present on Io's surface (e.g., around the Pele volcano).

Original languageEnglish (US)
Pages (from-to)293-297
Number of pages5
JournalIcarus
Volume133
Issue number2
DOIs
StatePublished - Jun 1 1998
Externally publishedYes

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ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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