Figure 3

Composition of crystalline products of anatectic melts in UHP metamorphic terranes (Additional file3: Table S2). (a) MALI index (Na₂O + K₂O - CaO) against SiO₂ contents, where the boundaries for calcic, calc-alkalic, alkali-calcic, and alkalic fields are after Frost et al. (2001). (b) Molar SiO₂/Al₂O₃ ratios against molar (Na₂O + K₂O)/Al₂O₃ ratios, where open diamonds, stars, and circles denote the experimental data for aqueous solution, hydrous melt, and supercritical fluid, respectively, used in Figure two of Hermann et al. (2013) for comparison. Data for leucosomes in the UHP metamorphic rocks from North Qaidam are after Chen et al. (2012b), Yu et al. (2012), and Song et al. (2014), and those for multiphase solid inclusions (MSI) in garnet of the UHP eclogites from the Dabie orogen are after Gao et al. (2013). Large MSI have a size of 24 to 160 μm that were directly sampled by the internal ablation method for the LA-ICPMS analysis, whereas small MSI have a size of <24 μm that were sampled by the external ablation method with minor involvement of the host mineral (Gao et al. 2013).