Record details

Title
    Geochemistry of the Drahotín and Mutěnín intrusions, West Bohemian shear zone, Bohemian massif: contrasting evolution of mantle-derived melts
Author
    Ackerman, Lukáš
    Krňanská, Martina
    Siebel, Wolfgang
    Strnad, Ladislav
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Mineralogy and Petrology
Vol./nr.
    Roč. 99, č. 3-4
Pages
    15
Year
    2010
Thesaurus term
    assimilation
    fractional crystallization
    gabbro
    Teplá-Barrandian
Keyword
    Bohemian
    Contrasting
    Drahotín
    Evolution
    Geochemistry
    Intrusions
    Mantle-derived
    Massif
    Melts
    Mutěnín
    Shear
    West
    Zone
Abstract (in english)
   In western Bohemia, the Drahotín and Mutěnín intrusions show different origins and evolutions. Parental magmas of the Drahotín intrusion were derived predominantly from enriched mantle sources, and the melts have undergone a significant degree of assimilation-fractional crystallization during their ascent and/or emplacement into the Earth`s crust. In contrast, the compositional variation of the complex Mutěnín intrusion cannot be explained by similar processes as in the case of Drahotín intrusion, but more likely reflects the involvement of several parental magmas. The gabbronorite was derived from a depleted mantle source, whereas the diorite/syenite stem from a mixed mantle-crust reservoir. The contrasting evolution of the Drahotín and Mutěnín intrusions may be due to their melt derivation and magma emplacement under different tectonothermal regimes at different times during Variscan orogenesis.
Contributor
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
    R
Import date
    8. 8. 2012