Record details

Title
    Grain-scale processes in actively deforming magma mushes: New insights from electron backscatter diffraction (EBSD) analysis of biotite schlieren in the Jizera granite, Bohemian Massif
Other titles
    Procesy v magmatu
Author
    Týcová, Patricie
    Verner, Kryštof
    Žák, Jiří
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Lithos
Vol./nr.
    Roč. 106, č. 3-4
Pages
    14
Year
    2008
Thesaurus term
    central-europe
    crystallization
    deformation
    dynamic recrystallization
    Electron backscatter diffraction (EBSD)
    Electron backscatter diffraction (EBSD), Granite, Magnetic susceptibility anisotropy, Pluton, Schlieren
    Granite
    growth
    Magnetic susceptibility anisotropy
    orientation
    pluton
    rocks
    Schlieren
    terrane
    variscan orogen
Keyword
    Actively
    Analysis
    Backscatter
    Biotite
    Bohemian
    Deforming
    Diffraction
    EBSD
    Electron
    Grain-scale
    Granite
    Insights
    Jizera
    Magma
    Massif
    Mushes
    New
    Processes
    Schlieren
Abstract (in czech)
   In the porphyritic Jizera granite, Bohemian Massif, three distinct types of lattice-preferred orientations of biotite grains were revealed in schlieren-delineated magmatic structures using the electron backscatter diffraction (EBSD) method. (1) Biotite basal planes (001) reorient from schlieren-subparallel near the schlieren base to schlieren-perpendicular in the upper part of the schlieren. Both orientations share subhorizontal N-S to NNE-SSW-trending a axes. (2) In some domains, the a axes are steep and at a high angle to the schlieren plane while the c axes plunge shallowly and rotate around an ill-defined a axis. (3) In other domains, the EBSD coincides with background magnetic fabric of the host granite revealed using the anisotropy of magnetic susceptibility (AMS) method: that is, the a axes plunge shallowly to the SE or NW while the c axes are subhorizontal and cluster around the NE-SW trend.
Abstract (in english)
   In the porphyritic Jizera granite, Bohemian Massif, three distinct types of lattice-preferred orientations of biotite grains were revealed in schlieren-delineated magmatic structures using the electron backscatter diffraction (EBSD) method. (1) Biotite basal planes (001) reorient from schlieren-subparallel near the schlieren base to schlieren-perpendicular in the upper part of the schlieren. Both orientations share subhorizontal N-S to NNE-SSW-trending a axes. (2) In some domains, the a axes are steep and at a high angle to the schlieren plane while the c axes plunge shallowly and rotate around an ill-defined a axis. (3) In other domains, the EBSD coincides with background magnetic fabric of the host granite revealed using the anisotropy of magnetic susceptibility (AMS) method: that is, the a axes plunge shallowly to the SE or NW while the c axes are subhorizontal and cluster around the NE-SW trend.

   In the porphyritic Jizera granite, Bohemian Massif, three distinct types of lattice-preferred orientations of biotite grains were revealed in schlieren-delineated magmatic structures using the electron backscatter diffraction (EBSD) method. (1) Biotite b
Contributor
    Česká geologická služba
    UK Praha, Přírodovědecká fakulta
Contributor code
    ČGS (RIV)
    UK, PřF
Source format
    R
Import date
    8. 8. 2012
    15. 10. 2014