Record details

Title
    The Sklené garnet peridotite: petrology, geochemistry, and structure of a mantle-derived boudin in Moldanubian granulite
Author
    Ackerman, Lukáš
    Jelínek, E.
    Medaris Jr., G.
    Siebel, W.
    Tikoff, B.
    Toy, V.
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 54, č. 4
Pages
    s. 301-323
Year
    2009
Notes
    Projekt: KJB300130902, GA AV ČR
    Rozsah: 23 s. : WWW
    Výzkumný záměr: CEZ:AV0Z30130516
Subject category
    geochemistry
    LPO
    Moldanubian
    peridotite
    PT conditions
    radiogenic isotopes
Keyword
    Boudin
    Garnet
    Geochemistry
    Granulite
    Mantle-derived
    Moldanubian
    Peridotite
    Petrology
    Sklené
    Structure
Abstract (in english)
   The Moldanubian Sklené garnet peridotite, which preserves mineralogical, geochemical, and structural evidence for a protracted mantle evolution, is a small boudin (1 m) enclosed by granulite of the Gföhl Assemblage. The peridotite has a porphyroclastic texture, in which large garnet and smaller olivine and pyroxene porphyroclasts reside in a fine-grained, recrystallized matrix of olivine, pyroxene, and pargasitic amphibole). By comparison with other Moldanubian garnet peridotites in the Czech Republic, the Sklené peridotite likely represents a fragment of subcontinental lithospheric mantle. It experienced early partial fusion and depletion of incompatible elements at moderate pressure in the spinel stability field, followed by transport to high-pressure conditions. Subsequently, the depleted peridotite was metasomatized by transient, primitive basaltic melts, with the addition of Rb, Th, U, Pb, and Sr.
Contributor
    AV ČR Brno, Geologický ústav
Contributor code
    AV ČR, GLÚ
Source format
    U
Import date
    8. 8. 2012