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- Origins and formation of Earth and Mars, and other terrestrial bodies
- Accretion and late veneer
- Magma ocean (or not)
- Volatile budgets
- Setting the initial state
- Solubility
- Partitioning
- Mantle and core geochemistry/petrology
- Planetary scale volatile cycling
- Interactions between mantle, atmosphere, and core
- Through time
- Slabs in the transition zone
- Effects of variable fO2, pressure, temperature
- Wish List:
- Fully coupled planetary-scale model
- geochemistry + geodynamics
- Explain all the weird stuff in the mantle
- seen seismically
- needed geochemically
- size, mixing timescales, mechanical, chemical
- Where, when, and how did plate tectonics start?
- Explain why Earth, Mars, Venus, and Mercury are so different