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Fig. 6


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Major elements classification diagrams for magmatic rocks. (a) Mg# vs. SiO2; (b) K2O vs. SiO2 (Rickwood, 1989); (c) A/NK vs. A/CNK (Miniar and Piccoli, 1989); (d) MALI classification from Frost et al. (2001). See text for data sources on COAfB occurrences.

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