Experimental Determination of Mantle Solidi and Melt Compositions for Two Likely Rocky Exoplanet Compositions

Abstract

First of their kind experiments examine phase equilibria and melt compositions for exoplanet silicate mantles at terrestrially relevant ƒO2.• The mineralogy and melts are similar to those of Earth's mantle. One composition melts at conditions more likely to produce magma oceans.• Results can be used to calibrate future exoplanet models for volatile solubility, volcanic atmosphere contributions, and crust composition.

Experimental Determination of Mantle Solidi and Melt Compositions for Two Likely Rocky Exoplanet Compositions

“…New data produced by these experiments are available in the Supplement, as well as at AstroRepo (Brugman et al., 2021).…”