On the origin of the moon by rotational fission

  title={On the origin of the moon by rotational fission},
  author={Alan B. Binder},
  journal={The moon},
  • A. Binder
  • Published 1 March 1974
  • Geology
  • The moon
Based on simple CIPW norms for the proposed terrestrial upper mantle material, it is shown that if the Moon fissioned from the Earth and gravitationally differentiated, it could have a 72 km thick anorthosite (An97) crust, a calcium poor (3.8% by weight) pyroxenite upper mantle 100 Mg/Mg + Fe = 75 to 80) ending at a depth of 313 km and a dunite (Fo93_95) lower mantle below a depth of 313 km. Refinements of these simple norm models, based on the cooling history, crystallization sequence and the… 
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