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Oxygen isotopic evidence for vigorous mixing during the Moon-forming Giant Impact
- Source :
- Science, Volume 351, Issue 6272, pp. 493-496 (2016)
- Publication Year :
- 2016
-
Abstract
- Earth and Moon are shown here to be composed of oxygen isotope reservoirs that are indistinguishable, with a difference in {\Delta}"17O of -1 +/- 5ppm (2se). Based on these data and our new planet formation simulations that include a realistic model for 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 {\Delta}"17O within approximately 1 per mil of the terrestrial value, suggesting that these impactors were water rich.
- Subjects :
- Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- Science, Volume 351, Issue 6272, pp. 493-496 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1603.04536
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1126/science.aad0525