Supplemental Material: A mantle origin for high-Sr late Archean tonalite-trondhjemite-granodiorite suites

Sample descriptions, analytical methods, details of classification of literature TTG samples and comparison to Rayleigh fractionation models, and discussion of the Ti isotope compositions of low-pressure TTGs from the Yilgarn craton. Additionally contains supplemental figures and tables, as well as links to supplementary datasets: (1) Ti stable isotope data of Neoarchean TTGs from the Yilgarn craton (Spencer et al., 2026a); (2) compilation of global high-Sr TTG geochemical data (Spencer et al., 2026b); and (3) compilation of global Archean and Paleoproterozoic sanukitoid geochemical data (Spencer, 2026).