Tectonostratigraphic model of the Late Cretaceous inversion along the Nowe Miasto-Zawichost Fault Zone, SE Mid-Polish Trough

Abstract

The Nowe Miasto-Zawichost Fault Zone is located within the Teisseyre-Tornquist Zone that separates the East European Craton from the Palaeozoic Platform and forms one of the most fundamental lithospheric boudaries in Europe. High-quality seismic reflection profiles, calibrated by several deep wells, were interpreted in an effort to assess the timing and structural style of inversion tectonics within the SE segment of the Mid-Polish Trough. Thickness variations of the Upper Cretaceous series indicate that inversion movements commenced during the late Turonian?-Coniacian and intermittently persisted into the Maastrichtian and Paleocene. Structural features detected on seismic data include steep reverse faults, upthrusted basement blocks and positive flower structures. Inversion-related structure imaged on seismic data could be explained by deeper basement normal and reverse faulting and associate fold-propagation folding at shallower depths. The geometry of the identified inversion-related structures and the en-echelon pattern of the Nowe Miasto-Zawichost Fault Zone described using processed gravity data strongly suggest that inversion along the NE boundary of the SE segment of the Mid-Polish Trough was associated with strike-slip movements.