Titanium is a typical trace to minor cation in tourmalines from granitic pegmatites. Concentrations up to 2 wt.% TiO2 (∼0.25 apfu Ti) were locally found in tourmalines from primitive pegmatites and in black tourmalines from outer pegmatite units of more evolved pegmatites, whereas Fe-poor and Li-enriched tourmalines from inner units of complex (Li) pegmatites are typically Ti-free (Selway et al. 1999). We found Ti-rich tourmalines in three distinct paragenetic types: (i) Ca-enriched schorl-dravite associated with Kfs + Pl/Ab + Qz ± Ttn, Bt from several localities of intragranitic NYF pegmatites of the Třebíč Pluton, Moldanubian Zone,...
Titanium in tourmalines from granitic pegmatites and their exocontacts
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Petr Gadas, Milan Novák, Radek Škoda, Jan Cempírek, Adam Zachař, Tomáš Flégr, Federico Pezzotta; Titanium in tourmalines from granitic pegmatites and their exocontacts. The Canadian Mineralogist 2019;; 57 (5): 745–747. doi: https://doi.org/10.3749/canmin.AB00011
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