Extended Data Fig. 4: Spallation correction modelling for ilmenite-hosted melt inclusions after PEC correction.
From: A dry lunar mantle reservoir for young mare basalts of Chang’e-5
A cosmogenic deuterium production rate of 2.17 × 10−12 mol D g−1 Ma−1 (ref. 59) was used for melt inclusion glasses. (a) CRE age = 10 Ma. (b) CRE age = 50 Ma. (c) CRE age =100 Ma. (d) CRE age = 200 Ma. Open circles correspond to measured data and blue filled circles correspond to CRE-corrected data (Extended Data Table 4, Supplementary Table 4). Modelled degassing curves have been calculated assuming Rayleigh fractionation into a vacuum, using masses of 2.016 and 3.022, and a fractionation factor of (2.016/3.022)1/2 for H2, and masses of 18.015 and 19.021, corresponding to a fractionation factor of (18.015/19.021)1/2 for H2O, following the procedure of ref. 41 (Methods).
