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Plots of maficity versus (a) Rb/Sr ratio; (b) Zr (in ppm); (c) Nb/Ta ratio and (d) normalized La/Yb ratio ratios. Note the low maficity of leucogranite compared to high-K granodiorite and granite and the very evolved nature of biotite leucogranites with their high Rb contents and low Nb/Ta ratios. See text for data sources on COAfB occurrences.
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