Geochemical evidence for high volatile fluxes from the mantle at the end of the Archean: Sample data

This file describes the origin of samples and gives the original xenon data published in refs. 4, 5 and 8. The slopes of the fractionation lines are given in refs. 8 (Table S1), 5 (Tables 1 and S1) and 4 (Table S1). For the barite sample (Ref. 6, Table 1), Xe data were normalized to 132Xe since 130Xe could have been contributed by radioactivity products. In this case Δ129Xe was computed from 128Xe and 131,132Xe data. The Δ129Xe values were computed from the difference between the isotope fractionation slope (‰/u) and the 129Xe/130Xe values in deviation permil (‰) relative to the corresponding atmospheric isotope composition.