Figure 12

Representative plots for distinguishing between A1 and A2 granitoids. (a) Nb-Y-Ce diagram21, (b) Yb/Ta versus Y/Nb diagram60, (c) TZr (°C) versus SiO2 (wt.%) concentration, showing distinction among the Paleo- to Mesoproterozoic A-type granites in the southern margin of the NCC. Abbreviation: TZr (°C), calculated Zr saturation temperatures. Lines for average A-type granite and fractionated I-type granite are from the literature47. Detailed literature data are listed in Table SA.