The Role of Carbon in Extrasolar Planetary Geodynamics and Habitability

  title={The Role of Carbon in Extrasolar Planetary Geodynamics and Habitability},
  author={Cayman T. Unterborn and Jason E. Kabbes and Jeffrey S. Pigott and Daniel R. Reaman and Wendy R. Panero},
  journal={arXiv: Earth and Planetary Astrophysics},
The proportions of oxygen, carbon and major rock-forming elements (e.g. Mg, Fe, Si) determine a planet's dominant mineralogy. Variation in a planet's mineralogy subsequently affects planetary mantle dynamics as well as any deep water or carbon cycle. Through thermodynamic models and high pressure diamond anvil cell experiments, we demonstrate the oxidation potential of C is above that of Fe at all pressures and temperatures indicative of 0.1 - 2 Earth-mass planets. This means that for a planet… 
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