Emplacement, structural and P-T evolution of the ~346 Ma Miřetín Pluton (eastern Teplá-Barrandian Zone, Bohemian Massif): implications for regional transpressional tectonics - Discussion

Pavel Pitra (1)

1 Terre, Temps, Traçage

Vondrovic et al. (2011) describe magmatic to solid-state fabrics in the so-called Miřetín Pluton, which intruded in the central-eastern part of the Bohemian Massif, along the tectonic contact between the Hlinsko Unit in the hanging wall and the Svratka and Polička units in the footwall. The authors infer that the Pluton intruded in a transpressional domain along the eastern margin of the Teplá-Barrandian Zone and experienced an early submagmatic to hightemperature (HT) solid-state deformation in a transpressional regime before a subsequent, low-temperature (LT) deformation associated with normal kinematics. They acknowledge that this interpretation is "at variance with the earlier concepts of Pitra et al. (1994)", who studied the pluton and the adjacent rocks of the Hlinsko and Svratka units in some detail and concluded that the pluton was emplaced syntectonically into a ductile normal shear zone. Interestingly, most features described in the granodiorite are identical to those reported in Pitra et al. (1994), and the interpretation only is different. The goal of this contribution is to emphasize that the analysis of Vondrovic et al. (2011) does not take into account some important, regional features and that the interpretation proposed by Pitra et al. (1994) remains valid.

Domaines: Sciences de la Terre

Pavel Pitra. Emplacement, structural and P-T evolution of the ~346 Ma Miřetín Pluton (eastern Teplá-Barrandian Zone, Bohemian Massif): implications for regional transpressional tectonics - Discussion. Journal of Geosciences, 2012, 57 (3), pp.189-191. ⟨10.3190/jgeosci.121⟩. ⟨insu-00744621⟩