Fig. 6

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a. ACF diagram representing the composition of the three rock types considered: metagabbros, schists and serpentinite. A is corrected for sodium and potassium (A = Al2O3 - Na2O − K2O), C is corrected for phosphorus (C = CaO − P2O3) and F is corrected for manganese and titanium (F = FeOt + MgO − MnO − TiO2 with FeOt = 0.8998 × Fe2O3). b. Binary diagram representing the trend of Al2O3 vs TiO2 in the bulk rocks.
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