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Published June 1990 | Published
Journal Article Open

Igneous origin for the Na in the cloud of Io

Abstract

We heated mixtures of sulfur and Na-bearing silicates in evacuated silica glass capsules to temperatures between 600°C and 950°C. At or above 850°C, Na-silicate glass reacts with elemental S to form a (Na,K) sulfide. Mobilization of this phase may account for the presence of Na and K on the surface of Io, and hence in the material sputtered into the Jovian magnetosphere.

Additional Information

Copyright 1990 by the American Geophysical Union. (Received December 29, 1989; revised March 6, 1990; accepted March 9, 1990.) Paper number 90GL00748. We thank Jeffery Warner (Chevron Research Lab) for aid in SEM analysis and John Pirolo and Gabor Faludi for glass working. Mary Johnson thanks Mark Parisi, as usual. This research was supported by NASA NAGW-1741.

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