Fig.6
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Harker diagrams showing major element composition of calc-alkaline plutons in the French Massif Central and the Armorican massif. Literature data (white, black and grey symbols) are from 1986 (Pfeiffer); Shaw et al. (1993); Cuney et al., (2001) and Pin and Paquette (2002). Note the near linear trends drawn by diorites and tonalites extrapolating toward the composition of hornblende gabbros.
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