Record details

Title
    Compositional evolution and substitutions in disseminated and nodular tourmaline from leucocratic granites: Examples from the Bohemian Massif, Czech Republic
Other titles
    Chemický vývoj a substituce v rozptýlených a nodulárních turmalínech z leukokrátních granitů: Příklad z Českého masivu, Český masiv
Author
    Buriánek, David
    Novák, Milan
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Lithos
Vol./nr.
    Roč. 95, č. 1-2
Pages
    16
Year
    2007
Thesaurus term
    tourmaline granite
    Tourmaline, Schorl, Foitite, Dravite, Franite, Electron microprobe, Compositional evolution, Substitutions, Plotting diagrams, Czech Republic
Keyword
    Bohemian
    Compositional
    Czech
    Disseminated
    Evolution
    Examples
    Granites
    Leucocratic
    Massif
    Nodular
    Republic
    Substitutions
    Tourmaline
Abstract (in czech)
   V leukokratních turmalinických granitech byly vyčleněny dva rozdílné texturní typy turmalínu: (i) turmalín rozptýlený, který krystaluje přímo z magmatu a (ii) turmalín nodulární který se formuje při hranici solidu a subsolidu granitické taveniny. Tyto turmalíny mají podobné chemické složení a podobné frakcionační trendy.
Abstract (in english)
   Two distinct textural types of tourmaline were distinguished in leucocratic granites of the Bohemian Massif (Moldanubicum, Saxothuringicum): (i) commonly euhedral disseminated tourmaline (DT) crystallized in relatively early stage of the granite consolidation, and (ii) typically interstitial nodular tourmaline (NT) formed during the stage transitional from late solidus to early subsolidus crystallization. Very similar chemical composition and similar fractionation trends in both DT and NT tourmaline types indicate crystallization in a quasi-closed system from early solidus to early subsolidus stage of granite consolidation. The substitutions in tourmaline from NT granites in the Moldanubicum are more similar to the substitutions in tourmaline from Li-poor granitic pegmatites in the same region relative to tourmaline from DT granites.

   Two distinct textural types of tourmaline were distinguished in leucocratic granites of the Bohemian Massif (Moldanubicum, Saxothuringicum): (i) commonly euhedral disseminated tourmaline (DT) crystallized in relatively early stage of the granite consolidation, and (ii) typically interstitial nodular tourmaline (NT) formed during the stage transitional from late solidus to early subsolidus crystallization. Very similar chemical composition and similar fractionation trends in both DT and NT tourmaline types indicate crystallization in a quasi-closed system from early solidus to early subsolidus stage of granite consolidation. The substitutions in tourmaline from NT granites in the Moldanubicum are more similar to the substitutions in tourmaline from Li-poor granitic pegmatites in the same region relative to tourmaline from DT granites.
Contributor
    Česká geologická služba
    MU Brno, Přírodovědecká fakulta
Contributor code
    ČGS (RIV)
    MU, PřF
Source format
    R
Import date
    8. 8. 2012
    15. 10. 2014