Whole-rock geochemical characteristics of the two-mica granite and the massive greisen of Panasqueira. (a) Diagram of aluminous saturation index (A/NK vs. A/CNK). (b) Nb/Ta versus Zr/Hf diagram discriminating barren to ore-bearing peraluminous granites (modified from Ballouard et al., 2016). (c) Biplot PC1 vs. PC2 diagram displaying results of principal components analysis (PCA) performed on major and trace element compositions of granite, greisenized granite and greisen. (d) Isocon diagram displaying the mobility of elements during greisenization. The lines with percentage values correspond to the net percent gains and losses relative to the isocon (blue line). Granite and greisen compositions are respectively an average of the 11 least altered granite and the 3 most altered samples of greisen. (e) Major and trace elements mass changes in greisen relative to the best fit isocon.