Oxygen Isotopes and the Moon-Forming Giant Impact

  title={Oxygen Isotopes and the Moon-Forming Giant Impact},
  author={Uwe Wiechert and Alexander N. Halliday and D.-C. Lee and Gregory A. Snyder and L. A. Taylor and Douglas Iii Rumble},
  pages={345 - 348}
We have determined the abundances of 16O,17O, and 18O in 31 lunar samples from Apollo missions 11, 12, 15, 16, and 17 using a high-precision laser fluorination technique. All oxygen isotope compositions plot within ±0.016 per mil (2 standard deviations) on a single mass-dependent fractionation line that is identical to the terrestrial fractionation line within uncertainties. This observation is consistent with the Giant Impact model, provided that the proto-Earth and the smaller impactor planet… 
Oxygen Isotopes and Sampling of the Solar System
Oxygen is the dominant element in our planetary system. It is therefore remarkable that it shows substantial isotopic diversity both in mass-dependent fractionation, because it is a light element,
A non-terrestrial 16O-rich isotopic composition for the protosolar nebula
A precise determination of the oxygen isotopic composition of the solar wind from particles implanted in the outer hundreds of nanometres of metallic grains in the lunar regolith is reported.
Isotopes as tracers of the sources of the lunar material and processes of lunar origin
  • K. Pahlevan
  • Geology, Physics
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2014
The development of new isotopic tracers sensitive to processes in the melt–vapour lunar disc are discussed and theoretical calculations of their behaviour and sample observations can constrain scenarios of post-impact evolution in the earliest history of the Earth–Moon system.
Distinct oxygen isotope compositions of the Earth and Moon
The virtually identical oxygen isotope compositions of the Earth and Moon revealed by Apollo return samples have been a challenging constraint for lunar formation models. For a giant impact scenario
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.


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Abstract— The small difference between the O‐isotopic mass fractionation lines of the Earth and Mars has been measured precisely using a laser fluorination system. The precision achieved from the two
The oxygen‐isotopic record in enstatite meteorites
Abstract— Oxygen‐isotopic compositions were determined for a suite of enstatite chondrites and aubrites. In agreement with previous work (Clayton et al., 1984), most samples have O‐isotopic
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Down-temperature flow of aqueous fluid within planetesimals is sufficient to explain the mineralogical and oxygen isotopic diversity among CV, CM, and CI carbonaceous chondrites and displacement of the terrestrial planets from the primordial slope 1.
A Component of Primitive Nuclear Composition in Carbonaceous Meteorites
The oxygen of anhydrous, high-temperature minerals in carbonaceous meteorites is strongly depleted in the heavy stable isotopes 17O and 18O and probably results from the admixture of a component of almost pure 16O.
From interstellar gas to the Earth‐Moon system
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Origin of the Moon in a giant impact near the end of the Earth's formation
This work reports a class of impacts that yield an iron-poor Moon, as well as the current masses and angular momentum of the Earth–Moon system, and suggests that the Moon formed near the very end of Earth's accumulation.