Abstract:
Tourmalines from phlogopitite, pockets, and cut veinlets can be classified as variety between the shorl-dravite endmembers with the Feобщ.*100%/(Fe общ.+Mg) ratio ranging from 16.4 to 30.3%. Based on the F- contents tourmaline composition ranges from hydroxy- to fluor-dravite. Temperature of tourmaline crystallization estimated from the tourmaline-biotite thermometer is 360-490°C. Phlogopitite, pockets, and cut veinlets have been formed at the fF2 increasing and low values of fO2 and fCO2. Absolute age of phlogopitite estimated from Rb/Sr and Sm/Nd methods is about 210 Ma.
