Plot of calculated parental melt HSE concentrations, normalized to Re, Os, Ir, Ru, Pt and Pd concentrations for the CI chondrite Orgueil reported by Horan et al. (2003) and Au data were normalized to average Au concentrations of CI chondrites reported by Fischer-Gödde et al. (2010). Parameter concentrations are plotted from Table 6. For comparison, the initial parental melt concentrations estimated by Walker et al., 2008 (IVB), McCoy et al., 2011 (IVA), and Hilton et al., 2019 (SBT) are shown.