Volcanic Origin of Disulfur Monoxide (S2O) on Io

Mikhail Zolotov, Bruce Fegley

Research output: Contribution to journalArticle

24 Citations (Scopus)

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 1998
Externally publishedYes

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Io
volcanoes
volcanology
volcano
volcanic gas
gases
chemical equilibrium
condensation
hot spot
temperature
gas
calculation
chemical

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Volcanic Origin of Disulfur Monoxide (S2O) on Io. / Zolotov, Mikhail; Fegley, Bruce.

In: Icarus, Vol. 133, No. 2, 06.1998, p. 293-297.

Research output: Contribution to journalArticle

Zolotov, Mikhail ; Fegley, Bruce. / Volcanic Origin of Disulfur Monoxide (S2O) on Io. In: Icarus. 1998 ; Vol. 133, No. 2. pp. 293-297.
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