Record details

Title
    Constriction due to subduction: evidence for slab pull in the Mariánské Lázně complex (central European Variscides)
Statement of responsibility
    Gernold Zulauf
Author
    Zulauf, Gernold
Language
    anglicky
Source title - serial
    Terra nova
Vol./nr.
    Vol. 9, no. 5-6
Pages
    p. 232-236
Year
    1997
Notes
    4 obr., 1 fot., 2 s.bibl.
    Anglické resumé
    Zkr. název ser.: Terra nova
Subject group
    analýza petrotektonická
    bohemikum
    eklogit
    facie granulitová
    lineace
    mariánskolázeňský bazický komplex
    metamorfóza vysokotlaká
    podmínky P-T
    saxothuringikum
    subdukce
    tektonit
Geographical name
    ČR-Čechy
    Mariánské Lázně (Cheb)
    Poutnov (Karlovy Vary)
    SRN
Keyword
    Central
    Complex
    Constriction
    Due
    European
    Evidence
    Lázně
    Mariánské
    Pull
    Slab
    Subduction
    Variscides
Abstract (in english)
   S tectonites of the Mariánské Lázně eclogites include pencil fabrics, constrictional folds and mullions, that result from the first deformation increment observed. Petrological and microstructural data suggest that these structures formed by constrictional flow at deep subduction levels after, or even during, the elogite facies stage and before the subsequent high-pressure granulite facies overprint. Constriction at mantle depths is explained by taking into account the geometry and seismic properties of recent subduction zones. Here, constrictional strain and associated L > S tectonites should be expected below the rheology-controlled slab bend (at about 40 km depth), where dip-parallel extension and a reduced viscosity of the downgoing slab are compatible with a coaxial flow regime
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    18. 2. 2008
Import date
    8. 8. 2012