Figure 8

Zircon ɛHf_t through the Yerington magmatic system: Time corrected zircon ɛHf (ɛHf_t) versus interpreted unit age for samples spanning the Yerington magmatic system. Age determinations for each unit are the weighted mean (WM) from zircon single grain U–Pb CA–ID–TIMS analyses (Fig. 4). ɛHf_t error bars at 95% confidence interval (CI) with overdispersion. ‘Pre-’ and ‘inter-mineralisation’ fields shaded. Probability density plots (PDP) inset, coloured as per sample. From the MSWD data for ɛHf_t, ‘pre-mineralisation’ units show over dispersion (MSWD > 1) and ‘syn-mineralisation’ units show under dispersion (MWSD < 1). Data compared to previous whole rock ⁸⁷Sr/⁸⁶Sr_t²⁷ and zircon δ¹⁸O³⁶ isotope studies, which show subtle shifts from crustal to mantle isotopic signatures^73,74,75. All data points plotted in Fig. S17.