Record details

    Development of topaz-bearing granites of the Krudum massif (Karlovy Vary pluton)
Statement of responsibility
    Miloš René
Other titles
    Proceedings of the International Conference "Genetic Significance of hosphorus in Fractionated Granites" (IGCP roject No.373) (Variant.)
    René, Miloš
Source title - serial
    Acta Universitatis Carolinae, Geologica
    Vol. 42, no. 1
    p. 103-109
    7 diagr., 1 tab., 33 bibl.
    Zkr. název ser.: Acta Univ. Carol., Geol.
Subject group
    chemismus hornin
    inkluze minerální
    krušnohorský pluton
    krystalizace frakcionovaná
Geographical name
    Horní Slavkov (Sokolov)
    Krásno (Sokolov)
Abstract (in english)
   Krudum massif forms independent magmatic body in the SW part of the Karlovy Vary pluton. The youngest of granite types in this massif are topaz-albite granites of the Sn-W ore deposit Krásno-Horní Slavkov. These topaz-albite granites show hydrothermal alteration of different intensity and fill prominent structures of stock type. Their magmatic origin is indicated by the general morphology of the granite stocks and the occurrence of younger dyke topaz-albite granites and intrusive breccias. Magmatic model is further supported by the presence of snowball structures of quartz phenocrysts containiing orientated albite inclusions.Fractional crystallization, best evidenced in the older topaz-bearing two mica granites, turns in the topaz-albite granites into fluid fractionation indicated particularly by the low Th/U and LREE/HREE ratios and a prominrnt negative Eu normaly. Topaz-albite granites are ranked among -high granites with high proportion of incompatible elements (Li, Rb, Nb, Sn)
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    18. 2. 2008
Import date
    8. 8. 2012