International Journal of Earth Sciences

, Volume 97, Issue 1, pp 19–33 | Cite as

Magmatic fabrics and emplacement of the cone-sheet-bearing Knížecí Stolec durbachitic pluton (Moldanubian Unit, Bohemian Massif): implications for mid-crustal reworking of granulitic lower crust in the Central European Variscides

  • Kryštof Verner
  • Jiří Žák
  • Radmila Nahodilová
  • František V. Holub
Original Paper


The ∼340 Ma Knížecí Stolec durbachitic pluton was emplaced as a deep-seated cone-sheet-bearing ring complex into the Křišt’anov granulite body (Moldanubian Unit, Bohemian Massif). Prior to the emplacement of the durbachitic magma, the steep sub-concentric metamorphic foliation in the granulite formed due to intense ductile folding during high-grade retrograde metamorphism. Subsequently, the durbachitic pluton intruded discordantly into the granulite at around ∼340 Ma. The steep margin-parallel magmatic fabric in the durbachitic rocks may have recorded intrusive strain during emplacement. After the emplacement, but prior to the final solidification, the pluton was overprinted by the regional flat-lying fabric under lower pressure–temperature conditions (T = 765 ± 53°C; P = 0.76 ± 0.15 GPa). Based on this study and comparison with other ultrapotassic plutons, we suggest that the flat-lying fabrics, widespread throughout the exhumed lower to middle crust (Moldanubian Unit), exhibit major variations in character, intensity, kinematics, and shape of the fabric ellipsoid. These fabrics may have formed at different structural levels and in different parts of the root prior to ~337 Ma. Therefore, we suggest that this apparently “single” orogenic fabric recorded multiple deformation events and heterogenous finite deformation rather than reflecting a single displacement field within the orogenic root.


Durbachite Emplacement Exhumation Granulite Moldanubian Unit Pluton 



The thorough reviews and constructive comments by Alfons Berger, Jens C. Grimmer and Rainer Altherr helped to improve the manuscript and are gratefully acknowledged. We also thank Jaroslava Pertoldová for her great support of our work, and Jiří Konopásek and Stanislav Vrána for helpful discussions. The Armed Forces of the Czech Republic and Headquarters of the Boletice Military Training Area are thanked for allowing us to access the field area. This research was funded by Grant No. 271/2005/B-GEO/PrF of the Charles University Grant Agency (to K. Verner), Czech Geological Survey Internal Research Project No. 3233 (to K. Verner), Czech Geological Survey Internal Research Project No. 6201 (to J. Babůrek), and in part also by Grant No. 205/02/0514 of the Grant Agency of the Czech Republic (to F.V. Holub).


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Kryštof Verner
    • 1
    • 2
  • Jiří Žák
    • 1
    • 3
  • Radmila Nahodilová
    • 1
  • František V. Holub
    • 2
  1. 1.Czech Geological SurveyPragueCzech Republic
  2. 2.Institute of Petrology and Structural GeologyCharles UniversityPragueCzech Republic
  3. 3.Institute of Geology and PaleontologyCharles UniversityPragueCzech Republic

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