Record details

Title
    The Sklené garnet peridotite: petrology, geochemistry, and structure of a mantle-derived boudin in Moldanubian granulite.
Author
    Ackerman, Lukáš
    Jelínek, Emil
    Medaris, Gordon
    Medaris Jr., Gordon
    Siebel, Wolfgang
    Tikoff, Basil
    Toy, Virginia
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 54, č. 4
Pages
    22
    24
Year
    2009
Thesaurus term
    geochemistry
    LPO
    Moldanubian
    peridotite
    peridotite,LPO,geochemistry,radiogenic isotopes,PT conditions,Moldanubian
    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.

   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
    Česká geologická služba
    UK Praha, Přírodovědecká fakulta
Contributor code
    ČGS (RIV)
    UK, PřF
Source format
    R
Import date
    8. 8. 2012