Record details

Title
    Origin of migmatites by deformation-enhanced melt infiltration of orthogneiss: a new model based on quantitative microstructural analysis
Other titles
    Vznik migmatitů infiltrací taveniny při deformaci ortorul: nový model založený na kvantitativní mikrostrukturní analýze
Author
    Haloda, Jakub
    Hasalová, P.
    Hrouda, F.
    Lexa, O.
    Schulmann, Karel
    Týcová, Patricie
    Ulrich, Stanislav
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Metamorphic Geology
Vol./nr.
    Roč. 26, č. 1
Pages
    25
Year
    2008
Thesaurus term
    crystal size distribution, melt infiltration, melt topology, migmatites, quantitative textural analysis
Keyword
    Analysis
    Based
    Deformation-enhanced
    Infiltration
    Melt
    Microstructural
    Migmatites
    Model
    New
    Origin
    Orthogneiss
    Quantitative
Abstract (in czech)
   Vznik migmatitů infiltrací taveniny při deformaci ortorul: nový model založený na kvantitativní mikrostrukturní analýze
Abstract (in english)
   A detailed field study reveals a gradual transition from high-grade solid-state banded orthogneiss via stromatic migmatite and schlieren migmatite to irregular, foliation-parallel bodies of nebulitic migmatite within the eastern part of the Gföhl Unit (Moldanubian domain, Bohemian Massif). A new petrogenetic model is proposed for the origin of felsic migmatites by melt infiltration from an external source into banded orthogneiss during deformation. The migmatite microstructures developed by granular flow accompanied by melt-enhanced diffusion and/or melt flow. However, an AMS study and quartz microfabrics suggest that the amount of melt present did not exceed a critical threshold during the deformation to allow free movements of grains.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014