Terrestrial magma ocean origin of the Moon

  title={Terrestrial magma ocean origin of the Moon},
  author={Natsuki Hosono and Shun‐ichiro Karato and Junichiro Makino and Takayuki R. Saitoh},
  journal={Nature Geoscience},
A conceptual framework for the origin of the Moon must explain both the chemical and the mechanical characteristics of the Earth–Moon system to be viable. The classic concept of an oblique giant impact explains the large angular momentum and the lack of a large iron-rich core to the Moon, but in this scenario it is difficult to explain the similarity in the isotopic compositions of the Earth and Moon without violating the angular momentum constraint. Here we propose that a giant, solid impactor… 
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Asymmetric shock heating and the terrestrial magma ocean origin of the Moon
  • S. Karato
  • Geology, Physics
    Proceedings of the Japan Academy. Series B, Physical and biological sciences
  • 2014
One of the difficulties of the current giant impact model for the origin of the Moon is to explain the marked similarity in the isotopic compositions and the substantial differences in the major
A multiple-impact origin for the Moon
The hypothesis of lunar origin by a single giant impact can explain some aspects of the Earth–Moon system. However, it is difficult to reconcile giant-impact models with the compositional similarity
Oxygen isotopic evidence for vigorous mixing during the Moon-forming giant impact
The results indicate that the late veneer impactors had an average Δ′17O within approximately 1 per mil of the terrestrial value, limiting possible sources for this late addition of mass to the Earth-Moon system.
Identification of the giant impactor Theia in lunar rocks
Triple oxygen isotope data reveal a 12 ± 3 parts per million difference in Δ17O between Earth and the Moon, which supports the giant impact hypothesis of Moon formation, and show that enstatite chondrites and Earth have different Δ 17O values, and speculate on an enstatITE chondrite–like composition of Theia.
Geochemical arguments for an Earth-like Moon-forming impactor
An inversion method is presented to calculate the Hf/W ratios and ϵ182W values of the proto-Earth and impactor mantles for a given Moon-forming impact scenario.
New approaches to the Moon's isotopic crisis
  • H. Melosh
  • Geology, Physics
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2014
The isotopic constraint may be the most stringent test yet for theories of the Moon's origin, as it differs from the Earth's in its low volatile content and perhaps in the elevated abundance of oxidized iron.
Magma oceans in the inner solar system
Theory and observations point to the occurrence of magma ponds or oceans in the early evolution of terrestrial planets and in many early-accreting planetesimals. The apparent ubiquity of melting