Record details

    Ti-bearing andradite-prehnite-epidote assemblage from the Malá Fatra granodiorite and tonalite (Western Carpathians)
Statement of responsibility
    Shah Wali Faryad, Ivan Dianiška
    Dianiška, Ivan
    Faryad, Shah Wali
Source title - serial
    Schweizerische mineralogische und petrographische Mitteilungen
    Vol. 83, no. 1
    p. 47-56
    7 obr., 2 fot., 7 tab., 29 bibl.
    Zkr. název ser.: Schweiz. mineral. petrogr. Mitt.
Subject group
    chemismus minerálů
    hydrotermální alterace
    metamorfóza nízkostupňová
    podmínky P-T
    skupina epidotu
    vrásnění alpinské
    Západní Karpaty
Geographical name
Abstract (in english)
   Calc-silicate minerals (Ca-garnet, prehnite, epidote, titanite, actinolite) occur associated with chlorite and muscovite in Variscan tonalite and granodiorite of the Tatricum Unit in the Malá Fatra Mountains. They formed during postmagmatic cooling of granitoids. Garnet is rich in fluorine (F = 1.58 wt per cent) and Ti = 3.29 wt per cent with the end-member contents ranging between 50-74 mol per cent for andradite, 32-42 per cent for grossularite and 1-14 per cent for schorlomite + morimotoite. Major element contents in garnet indicate the exchanges of Fe3+Al-1, Fe2+TiFe3+-2 and VITiIVFe3+IVSi-1VIAl-1. Mineral assemblages and thermodynamic calculation indicate temperature of ca 360-380 °C at 0.2 GPa for garnet, prehnite and epidote formation. The tonalite and granodiorite were affected by Alpine metamorphic overprint, which resulted in deformation and formation of very low-grade mineral assemblages, involving pumpellyite, epidote, chlorite, muscovite, albite and microcline.
   P-T calculations yielded pressure of ca. 0.3 GPa at 300 °C for this metamorphic event in the Malá Fatra Mts. of the Tatricum Unit
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    26. 9. 2007
Import date
    8. 8. 2012