Silicon isotopes in lunar rocks: Implications for the Moon’s formation and the early history of the Earth

By R. Armytage, R. B. Georg, H. Williams, A. Halliday. 2012

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Evidence for Mo isotope fractionation in the solar nebula and during planetary differentiation (2014, background): “…a preferential loss of isotopically light Mo from the Moon, but more volatile and lighter elements such as Li (Magna et al., 2006), K (Humayun and Clayton, 1995) and Si (Armytage et al., 2012; Fitoussi and Bourdon, 2012) do not show significant isotopic fractionation between the Earth and Moon.”
Melting and mixing states of the Earth’s mantle after the Moon-forming impact (2015, methodology): “However, this model has difficulty in explaining the fact that the Earth and Moon have nearly identical isotopic ratios (e.g. oxygen, silicon, and tungsten, Wiechert et al. 2001; Herwartz et al. 2014; Armytage et al. 2012; Touboul et al. 2007).”
Planetary and meteoritic Mg/Si and δ30Si variations inherited from solar nebula chemistry (2015, result): “053‰ (2SE), in good agreement within uncertainties with previous recent measurements (-0.286±0.011‰; average and 95% confidence interval of 14 measurements from Fitoussi et al., 2009; Savage et al., 2010, 2011; Zambardi and Poitrasson, 2011; Armytage et al., 2011; Armytage et al., 2012; Pringle et a”