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Volatile Element Chemistry during Metamorphism of Ordinary Chondritic Material and Some of its Implications for the Composition of Asteroids
Laura Schaefer, Bruce Fegley
We used chemical equilibrium calculations to model thermal metamorphism of ordinary chondritic material as a function of temperature, pressure, and trace element abundance and use…
Outgassing of Ordinary Chondritic Material and Some of its Implications for the Chemistry of Asteroids, Planets, and Satellites
Laura Schaefer, Bruce Fegley
We used chemical equilibrium calculations to model thermal outgassing of ordinary chondritic material as a function of temperature, pressure, and bulk compositions and use our resu…
Application of an Equilibrium Vaporization Model to the Ablation of Chondritic and Achondritic Meteoroids
Laura Schaefer, Bruce Fegley
We modeled equilibrium vaporization of chondritic and achondritic materials using the MAGMA code. We calculated both instantaneous and integrated element abundances of Na, Mg, Ca,…
Silicon Tetrafluoride on Io
Laura Schaefer, Bruce Fegley
Silicon tetrafluoride (SiF4) is observed in terrestrial volcanic gases and is predicted to be the major F - bearing species in low temperature volcanic gases on Io (Schaefer and Fe…
Alkali and Halogen Chemistry in Volcanic Gases on Io
Laura Schaefer, Bruce Fegley
We use chemical equilibrium calculations to model the speciation of alkalis and halogens in volcanic gases emitted on Io. The calculations cover wide temperature (500-2000 K) and p…
Predicted Abundances of Carbon Compounds in Volcanic Gases on Io
Laura Schaefer, Bruce Fegley
We use chemical equilibrium calculations to model the speciation of carbon in volcanic gases on Io. The calculations cover wide temperature (500-2000 K), pressure (10^-8 to 10^+2 b…