Record details

Title
    The Mariánské-Lázně Complex, NW Bohemian Massif: development and destruction of an early Palaeozoic seaway
Statement of responsibility
    Quentin G. Crowley, Peter A. Floyd, Veronika Štědrá, John A. Winchester, Václav Kachlík, J. Grenville Holland
Other titles
    Palaeozoic Amalgamation of Central Europe (Variant.)
Author
    Crowley, Quentin G.
    Floyd, Peter A.
    Holland, J. Grenville
    Kachlík, Václav
    Štědrá, Veronika
    Winchester, John A.
Language
    anglicky
Source title - serial
    Geological society special publication
Vol./nr.
    Vol. 201
Pages
    p. 177-195
Year
    2001
Notes
    10 obr., 1 tab., 5 s. bibl.
    il.
    Zkr. název ser.: Geol. Soc. spec. Publ. (London).
Subject group
    chemismus hornin
    eklogit
    kambrium
    kontaminace magmatu
    krystalizace frakcionovaná
    kůra oceánská
    mariánskolázeňský bazický komplex
    metabazit
    metamorfóza
    ofiolity
    ordovik
    podmínky P-T
    protolit
    příkrov
    vrásnění kadomské
    vrásnění variské
Geographical name
    ČR-Čechy
    Kladská (Cheb)
    Mariánské Lázně (Cheb)
    Teplá (Karlovy Vary)
Keyword
    Bohemian
    Complex
    Destruction
    Development
    Early
    Mariánské-Lázně
    Massif
    NW
    Palaeozoic
    Seaway
Abstract (in english)
   The Mariánské-Lázně Complex is a Cambro-Ordovician terrane of oceanic affinity tectonically emplaced between the Saxothuringian Zone and Teplá-Barrandian Unit, NW Czech Republic. It forms a SE-dipping allochthonous body that comprises the largest contiguous exposure of metamorphosed basic and ultrabasic lithologies in the Bohemian Massif. Petrographic evidence indicates that a significant proportion of protoliths underwent eclogite facies metamorphism (570 to 720 °C, 1.44 to 2.10 GPa), followed by an increase in temperature (up to around 800 °C) and a subsequent widespread retrograde amphibolite facies event (550 to 680 °C, 0.75 to 1.20 GPa). New major and trace element geochemical analyses of metamorphosed basic and ultrabasic lithologies indicate that they exhibit geochemical characteristics attributable to a sea floor origin. The metabasites were generated at a spreading centre that interacted with deep-seated upwelling mantle asthenosphere.
   Separate, independently fractionating basic melt batches existed: these were derived from depleted and enriched asthenosphere and depleted subcontinental lithosphere sources. Geochemical correlation of the Mariánské Lázně Complex with other early Palaeozoic metabasic provinces facilitates comparison of metabasic lithologies occurring in tectonically dislocated nappe pile thrust sheets, and allows delineation of important suture zones in the European Variscides
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    24. 10. 2007
Import date
    8. 8. 2012