TY - JOUR A1 - Pivec,E. A1 - Stemprok,M. A1 - Novak,J.K. A1 - Lang,M. T1 - Tourmaline as a late-magmatic or postmagmatic mineral in granites of the Czech part of the Krusne hory - Erzgebirge batholith JF - Journal of the Czech Geological Society JA - J. Czech Geol. Soc. Y1 - 1998 VL - 43 IS - 1-2 SP - 17 EP - 23 CY - Prague PB - Czech Geological Society SN - 1803-1943 (online), 1802-6222 (print) AV - Free UR - http://www.jgeosci.org/index.php?pg=detail&ID=JCGS.745 L1 - http://www.jgeosci.org/content/JCGS.745_Pivec.pdf KW - tourmaline KW - chemical composition KW - Late Palaeozoic granites KW - Krusne hory Mts. KW - Czech Republic AB - Tourmaline is an accessory mineral of the Late Palaeozoic granites of the Krusne hory - Erzgebirge batholith (290-330 Ma). Its occurrence is distinctly regionally dependent; it is common in the Western pluton of the batholith and extremely rare in granites of the Eastern pluton. Very low content of Mg and Fe in granites cause the rare occurrence of tourmaline in the pluton in spite of a high content of boron in granite melt, eg in Blatna granite body. The magmas themselves were incapable of conserving much boron as displayed by the occurrences of tourmalinized phyllites and tourmalinites at contact of this body. All the tourmalines examined correspond to schorl-dravite series with a low content of uvite component, especially in metasedimentary rocks. A higher concentration of fluorine in tourmaline is in greisenized granites, whereas the lowest contents were found in tourmalines occurring in wolframite - quartz veins at Rotava. Thus, the chemistry of tourmalines indicates the conditions of their crsytallization. ER -