Record details

Title
    Lithological composition and geodynamic evolution of the south-eastern part of the Šumava Mts.(Moldanubian Zone, Bohemian Massif)
Author
    Franěk, Jan
    Pertoldová, Jaroslava
    Verner, Kryštof
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Silva Gabreta
Vol./nr.
    Roč. 16, č. 3
Pages
    22
Year
    2010
Thesaurus term
    Šumava Mountains, Bohemian Forest, Variscan orogen, Moldanubian Zone, tectonometamorphic processes
Keyword
    Bohemian
    Composition
    Evolution
    Geodynamic
    Lithological
    Massif
    Mts.(Moldanubian
    South-eastern
    Šumava
    Zone
Abstract (in english)
   The SE part of the Šumava Mts. (i.e. Bohemian Forest) offers a unique opportunity to observe the interaction of deformations in high-grade metamorphic rocks with development of magmatic fabrics in contemporaneous intrusions in a fluid state, proceeding at temperatures above ~700 °C and pressures corresponding to depths of ~20-30 km. The geological history is related to the Variscan orogenic processes, which, in this region of the so-called Moldanubian Zone, can be divided into (1) Exhumation of the deep-seated rocks at ~343-335 Ma associated with ascent of ultrapotassic, Mg-K-rich (durbachite) intrusions, immediately followed by an LP-HT metamorphic event and anatexis; (2) Intrusion of large volumes of high-K I-type Weinsberg granitoids into the partially exhumed Moldanubian rock syntectonic with distinct younger deformations at ~340-325 Ma, followed by emplacement of peraluminous S-type Eisgarn posttectonic granites contemporaneous with the activity of the Pfahl Shear Zone at ~325 Ma.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014