Fig. 2: δ30SiNBS28 and δ18OVSMOW (±2 s.e; see Methods.) values of modeled JH (Jack Hills) melts (n = 127) in comparison with younger lithologies.
From: Eoarchean and Hadean melts reveal arc-like trace element and isotopic signatures
Individual analyses are presented here since some zircons could accommodate multiple ion microprobe sputtering locations. Sources: LFB WR (Lachlan Fold Belt Whole Rock; cyan and pink triangles and fields)21, Archaean cherts/silicified pillow basalts from Barberton, South Africa (dark blue and yellow squares and fields)49 and modern ODP (Ocean Drilling Program) serpentinites (black and maroon diamonds) (δ18O50). Clays (dark pink field) (δ30Si;51 δ18O52), shales (thatched light green and turquoise fields) (δ30Si;53 δ18O54), Mantle reservoirs (lime green box) (δ30Si of HIMU (Hi-μ; Mangaia, Cook Islands), EM1 (Enriched Mantle 1; Pitcairn islands) and EM2 (Enriched Mantle 2; Samoa))55; δ18O of HIMU56 (Olivine phenocrysts57, Δ18Omelt-olivine58), δ18O of EM1 and EM256) and Archaean komatiites (red bar) (δ30Si:26, δ18O59,60). JHmelt δ18O, serpentinite error bars are smaller than the symbols. The assimilation/re-melting of these lithologies was also hinted at in just the JHZ (Jack Hills zircon) isotopic data (Supplementary Fig. 1). Data for MORB (Mid-Oceanic Ridge Basalt) is from ref. 61.
