Tourmaline composition probes serpentinite-derived fluid interactions in subduction zones

Table S1 to S3 comprise detailed data on major element, trace element, and B isotope compositions of the studied tourmalines. Table S4 and Table S5 show the compiled range of XMg and δ11B values of metamorphic and metasomatic tourmalines in (U)HP rocks, respectively. Table S6 presents the compiled XMg and δ11B values of tourmaline associated with serpentinite fluid influx and their corresponding counterparts.