Record details

    Perovskite from the Miedzyrzecze sill near Bielsko-Biala in the Polish Carpathians (The type area of the teschenite association)
Statement of responsibility
    Roman Wlodyka, Lukasz Karwowski
Other titles
    Perowskit z sillu w Miedzyrzeczu kolo Bialska-Bialej w polskich Karpatach fliszowych (obzar typowy asocjacji cieszynitowej)
    Karwowski, Lukasz
    Wlodyka, Roman
Source title - serial
    Archiwum Mineralogiczne
    Vol. 53, no. 1-2
    p. 109-130
    9 obr., 6 fot., 6 tab., 2 s. bibl.
    Zkr. název ser.: Arch. mineral. (Warszawa)
Subject group
    chemismus minerálů
    flyšové pásmo Západních Karpat
    hydrotermální alterace
    krystalová struktura
    vzácné zeminy
    zonálnost krystalu
Geographical name
Abstract (in english)
   For the first time perovskite has been observed in the western part of the Polish Flysch Carpathians, in the olivine glimmerite sill of the Bielsko-Biala vicinity. Perovskite and titaniferous magnetite belong to the latest minerals, filling the interstices between diopside and phlogopite. Detailed investigations: chemical and thermal analysis, X-ray diffraction as well as infrared and gamma spectroscopy, indicated that the studied perovskite is almost pure CaTiO3 (perovskite sensu stricto) containing only 2.60 to 4.20 wt. per cent REE2O3, 2.40 to 3.60 wt. per cent Nb2O5, 0.40 to 1.20 wt. per cent Fe2O3 and 0.80 to 1.10 wt. per cent Na2O. The unit cell parameters and tilt angle of the (Ti, Nb, Fe)06 octahedra are very similar to those typical of the perovskite specimens from other alkaline ultrabasic complexes. Total homogenization of several melt inclusions was achieved at about 1000°C; trapped phases (probably pyrrhotite or chalcopyrite) did not dissolve in the melt inclusion filling.
   The observed formation of titanite or titaniferous garnets replacing perovskite was controlled by a low leach rate of calcium from perovskite structure and a high activity of SiO2 in hydrothermal fluids. The leaching of Nb and LREE elements, stimulated by perovskite fracturing, was caused by CO2-bearing fluids
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    16. 8. 2007
Import date
    8. 8. 2012