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.本文件说明了样本的来源，并给出了参考文献4、5和8中发表的原始氙（Xenon）数据。分馏线的斜率详见参考文献8（补充表S1）、5（表1及补充表S1）和4（补充表S1）。针对重晶石样本（参考文献6，表1），由于130Xe可能由放射性产物生成，故将氙同位素数据归一化至132Xe。在此情形下，Δ¹²⁹Xe通过128Xe以及131Xe、132Xe的数据计算得到。Δ¹²⁹Xe值由同位素分馏斜率（‰/u）与相对于对应大气同位素组成的129Xe/130Xe偏差千分比（‰）之间的差值计算得出。