Record details

Title
    Turmalíny ze svorů svrateckého krystalinika
Other titles
    Tourmaline from the mica schist of the Svratka Crystalline Complex
Author
    Buriánek, David
    Čopjaková, Renata
Language
    česky
Publication type
    článek v periodiku
Source title - serial
    Acta Mus. Moraviae, Sci. geol.
Vol./nr.
    Roč. 93, č. 1
Pages
    17
Year
    2008
Thesaurus term
    boron
    Czech Republic
    metamorphism
    mica schist
    schorl-dravite
    Svratka Crystalline Complex
    tourmaline
Keyword
    Krystalinika
    Svorů
    Svrateckého
    Turmalíny
Abstract (in czech)
   Tourmaline is a typical accessory mineral for most of micaschists in the Svratka Crystalline Complex. Based on petrographic and chemical data, two main generations of tourmaline have been distinguished. The first generation (tourmaline cores) corresponds to the prograde metamorphic event characterised by mineral assemblage Ms+Bt+Tu+/-Ky+/-St. The second generation of tourmaline (tourmaline rims) formed during exhumation of the Svratka Crystalline Complex, simultaneously with decompression breakdown of staurolite. Microprobe analyses of tourmalines reveal a compositional variation between Al-rich schorldravite to dravite (XFe 0.22-0.61; Al 5.88-6.77 apfu; Na 0.45-0.91 apfu). Tourmaline rims are typically enriched in Fe, usually enriched in Al and depleted in Mg, Na, Si relative to tourmaline cores.
Abstract (in english)
   Tourmaline is a typical accessory mineral for most of micaschists in the Svratka Crystalline Complex. Based on petrographic and chemical data, two main generations of tourmaline have been distinguished. The first generation (tourmaline cores) corresponds to the prograde metamorphic event characterised by mineral assemblage Ms+Bt+Tu+/-Ky+/-St. The second generation of tourmaline (tourmaline rims) formed during exhumation of the Svratka Crystalline Complex, simultaneously with decompression breakdown of staurolite. Microprobe analyses of tourmalines reveal a compositional variation between Al-rich schorldravite to dravite (XFe 0.22-0.61; Al 5.88-6.77 apfu; Na 0.45-0.91 apfu). Tourmaline rims are typically enriched in Fe, usually enriched in Al and depleted in Mg, Na, Si relative to tourmaline cores.
Contributor
    MU Brno, Přírodovědecká fakulta
Contributor code
    MU, PřF
Source format
    R
Import date
    8. 8. 2012