Compositional evolution planetary differentiation

The accompanying review by Fegley discusses both the release of volatiles from planetary interiors during melting and density-dependent differentiation and their subsequent compositional evolution (P). The present composition of planetary atmospheres reflects a richly complex history. 

Cosmochemislry places important constraints on models for the origin of the solar nebula and the formation and evolution of planets. We explore nebula constraints by defining the thermal conditions under which meteorite components formed and examine the isotopic evidence for interaction of the nebula with the ISM and a nearby supernova. We consider how planetary bulk compositions are estimated and how they are used to understand the formation of the terrestrial and giant planets from nebular materials. We review the differentiation of planets, focusing especially on the Earth. We also consider how orbital and collisional evolution has redistributed materials formed in different thermal and compositional regimes within the solar system. 

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