Record details

Title
    The mechanism of flow and fabric development in mechanically anisotropic trachyte lava
Author
    Haloda, J.
    Hrouda, F.
    Lexa, O.
    Schulmann, K.
    Týcová, P.
    Závada, Prokop
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Structural Geology
Vol./nr.
    Roč. 31, č. 11
Pages
    s. 1295-1307
Year
    2009
Notes
    Projekt: GA205/03/0204, GA ČR, CZ3cav_un_auth*0007398
    Projekt: KJB301110703, GA AV ČR3cav_un_auth*0229087
    Rozsah: 13 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    anisotropy of magnetic susceptibility
    fibre-slip mechanism
    lava dome
    mechanical anisotropy
    sanidine
    trachyte
Keyword
    Anisotropic
    Development
    Fabric
    Flow
    Lava
    Mechanically
    Mechanism
    Trachyte
Abstract (in english)
   Anisotropy of magnetic susceptibility (AMS) and Electron back-scattered diffraction (EBSD) of magnetite and sanidine fabrics throughout an eroded trachyte lava dome in Tertiary volcanic province of the NW Czech Republic revealed two fabric types. The high degree of AMS fabric is associated with sanidine textural domains similar to normal kink bands and occupies the whole body except the SW margin. Folded fabric and low anisotropy of AMS also in the SW margin reveals sanidine alignment domains resembling reverse kink-bands. The flow of trachyte lava occurred via simultaneous slip of sanidine crystal along their planes and also by readjustment of the textural domain boundaries according to the fibre-slip theory.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013