Supplementary Materials for Carbonatite versus silicate melt metasomatism impacts grain scale 87Sr/86Sr and 143Nd/144Nd heterogeneity in Polynesian mantle peridotite xenoliths

Major element, trace element, and Sr and Nd isotope analyses of minerals from Samoa and Tahiti mantle xenoliths. Dataset S1 are Olivine, clinopyroxene, orthopyroxene, and spinel major element concentrations (wt. %) for the four peridotite xenoliths examined in this study. Dataset S2 are Trace element concentrations (in ppm) of olivine, orthopyroxene, and clinopyroxene. Dataset S3 are Strontium and neodymium isotope compositions of single grains (of opx, cpx, olivine) from Savai'i and Tahiti xenoliths.