Economic and Environmental Geology

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Fig. 3.

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Fig. 3. Ternary diagram of molecular Al2O3 (CaO+Na2O+K2O) (FeOt+MgO), showing-weathering trends of granitic source (A) and basaltic source (B). C= digenetic and/or metasomatic transformation of kaolinite (Ka) into illite (Ill) with fluids characterized by high K+/H+ ratios. D= digenetic and/or metasomatic transformation of kaolinite into chlorite (Chl) with fluids characterized by high Mg+2 /H+ ratios. Bt= biotite; Kfs= feldspar; Hb= hornblende; Ms= muscovite; Sm= smectite, (Toulkeridis et al., 1999).
Econ. Environ. Geol. 2021;54:213-32 https://doi.org/10.9719/EEG.2021.54.2.213
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