Propagation of the south-eastern segment of the Polish Trough connected with bounding fault zones (from the Permian to the Late Jurassic)

Abstract

Sedimentary thicknesses and fault patterns give evidence for longitudinal propagation of the south-eastern segment of the Polish Trough towards the SE during the Late Permian to Middle Jurassic times. The multiphase tectonic history includes three discrete episodes of accelerated subsidence: Late Permian Early Triassic, Early Jurassic and Late Jurassic. Two of them were connected with increasing activity on basin-bounding faults: the Holy Cross fault and the Nowe Miasto-lłza fault, which parallels the Tornquist-Teisseyre zone. The geometry of basin infill indicates a transverse asymmetry of the trough, activity of one transfer fault and an accommodation zone. The Late Jurassic was an episode of overall subsidence not coupled with major thickness gradients. This basin developed mainly in subhorizontal transtensional conditions in the NNE direction except for the phase (Middle and Upper Triassic) associated with gravity tectonics.