Tourmaline from the Přibyslavice peraluminous alkali-feldspar granite, Czech Republic
Chemical composition of tourmaline from the Přibyslavice alkali-feldspar granite (3 km2) in Moldanubian metamorphosed series in eastern Bohemia, is characterized by five wet and 43 microprobe analyses. The composition of the touramaline varies considerably from magnesium-rich FE61Mg36Al3 to magnesium-poor Fe84Mg9Al7 proton- and alkali-deficient schorl. Zoning of tourmaline is weak, however, the chemical differences between cores and rims are systematic: the ion content lowers from core to rim. A small deficiency of Si in the tourmalines is characteristic. In terms of the genetic classification, based on the proportion Al-Fe-Mg, the studied tourmalines belong to association of Li-poor granitoids, their pegmatites and aplites.
SNIP (Scopus, 2015): 0.700
IF (ISI, 2015): 1.326
Policy: Open Access