Oxygen isotopic evidence for vigorous mixing during the Moon-forming giant impact

Science
Edward D YoungAlessandro Morbidelli

Abstract

Earth and the Moon are shown here to have indistinguishable oxygen isotope ratios, with a difference in Δ'(17)O of -1 ± 5 parts per million (2 standard error). On the basis of these data and our new planet formation simulations that include a realistic model for primordial oxygen isotopic reservoirs, our results favor vigorous mixing during the giant impact and therefore a high-energy, high-angular-momentum impact. The results indicate that the late veneer impactors had an average Δ'(17)O 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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Citations

Mar 24, 2018·Astrobiology·Ben K D PearcePaul G Higgs
May 8, 2018·Proceedings of the National Academy of Sciences of the United States of America·Bing Xiao, Lars Stixrude
Aug 5, 2018·Rapid Communications in Mass Spectrometry : RCM·Laurence Y YeungTao Sun
Jan 23, 2019·Rapid Communications in Mass Spectrometry : RCM·Nak Kyu KimSun Young Park
May 21, 2020·Rapid Communications in Mass Spectrometry : RCM·S GhoshmaulikAnindya Sarkar
Nov 8, 2017·Scientific Reports·Edgar S SteenstraWim van Westrenen
Mar 31, 2018·Science Advances·Richard C GreenwoodNatalie A Starkey
Jan 18, 2017·Science Advances·Melanie BarboniKevin D McKeegan
Apr 7, 2018·Earth and Planetary Science Letters·Rebecca A FischerDavid P O'Brien
Mar 24, 2021·Nature Communications·Sune G NielsenMaureen Auro

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