Počet záznamů: 1

The Sklené garnet peridotite: petrology, geochemistry, and structure of a mantle-derived boudin in Moldanubian granulite

  1. 1.
    0337040 - GLU-S 2010 RIV JP eng J - Článek v odborném periodiku
    Medaris Jr., G. - Ackerman, Lukáš - Jelínek, E. - Toy, V. - Siebel, W. - Tikoff, B.
    The Sklené garnet peridotite: petrology, geochemistry, and structure of a mantle-derived boudin in Moldanubian granulite.
    Journal of Geosciences. Roč. 54, č. 4 (2009), s. 301-323 ISSN 0449-2560
    Grant CEP: GA AV ČR KJB300130902
    Výzkumný záměr: CEZ:AV0Z30130516
    Klíčová slova: peridotite * LPO * geochemistry * radiogenic isotopes * PT conditions * Moldanubian
    Kód oboru RIV: DD - Geochemie

    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.
    Trvalý link: http://hdl.handle.net/11104/0181130