New basin modelling results from the Polish part of the Central European Basin system: implications for the Late Cretaceous–Early Paleogene structural inversion

Abstract

Combined subsidence and thermal 1D modelling was performed on six well-sections located in the north-western Mid-Polish Trough/Swell in the eastern part of the Central European Basin system. The modelling allowed constraining quantitatively both the Mesozoic subsidence and the magnitude of the Late CretaceousPaleocene inversion and erosion. The latter most probably reached 2,400 m in the Mid-Polish Swell area. The modelled Upper Cretaceous thickness did not exceed 500 m, and probably corresponded to 200-300 m in the swell area as compared with more than 2,000 m in the adjacent noninverted part of the basin. Such Upper Cretaceous thickness pattern implies early onset of inversion processes, probably in the Late Turonian or Coniacian. Our modelling, coupled with previous results of stratigraphic and seismic studies, demonstrates that the relatively low sedimentation rates in the inverted part of the basin during the Late Cretaceous were the net result of several discrete pulses of nondeposition and/or erosion that were progressively more pronounced towards the trough axis. The last phase of inversion started in the Late Maastrichtian and was responsible for the total amount of erosion, which removed also the reduced Upper Cretaceous deposits. According to our modelling results, a Late Cretaceous heat-flow regime which is similar to the present-day conditions (about 50 mW/m 2 ) was responsible for the observed organic maturity of the Permian-Mesozoic rocks. This conclusion does not affect the possibility of Late CarboniferousPermian and Late Permian-Early Triassic thermal events.

Climatic disaster at the Triassic-Jurassic boundary - a clay minerals and major elements record from the Polish Basin

“…area and in the Pom er anian seg ment of MPT was mostly in the range of 1500-2000 m (Resak et al, 2008;Brañski, 2009Brañski, , 2011aNarkiewicz et al, 2010;S³owakiewicz and Poprawa, 2010), in di cat ing that the Rhaetian-Hettangian strata stud ied were not sig nif i cantly mod ified by ther mal diagenesis. In ad di tion, the time dur ing which the lithostatic load in the MPT at tained max i mum val ues is es timated at only 20-30 My (Brañski, 2011a), which pre vented long-last ing diagenetic con di tions.…”

Polyphase dolomitization of the Wuchiapingian Zechstein Limestone (Ca1) isolated reefs (Wolsztyn Palaeo-Ridge, Fore-Sudetic Monocline, SW Poland)

“…Dur ing Late Perm ian and Me so zoic times, con tin ual sub si dence took place with pe ri ods of ac cel er ated sub sidence, un til the Turonian to Paleocene tec tonic in ver sion of the Pol ish Ba sin (see Resak et al, 2007;Krzywiec et al, 2009;and ref er ences therein). At pres ent, the base of the Zechstein Lime stone lies at a depth of 2.0-2.5 km, and at the end of Juras sic it was lo cated at a depth of ca.…”

The internal geometry and lithofacies pattern of the Upper Cretaceous-Danian sequence in the Polish Lowlands

“…The other con cept as sumes that the in version was a multi-phase pro cess trig gered dur ing the (? )lat est Turonian-Coniacian (Dadlez, 1976(Dadlez, , 1980Jaskowiak-Schoeneichowa, 1981;Krassowska, 1997;Dadlez and Marek, 1997;Leszczyñski, 1997Leszczyñski, , 2000Leszczyñski and Dadlez, 1999;Krzywiec, 2000Krzywiec, , 2002aKrzywiec, , b, 2006Resak et al, 2008;Krzywiec et al, 2009). Anal y sis of seis mic data sug gests the fol low ing gen eral in ver sion phases: late Turonian-Coniacian, late Santonian-Campanian and late Maastrichtian-Paleo cene (Krzywiec, 2006).…”

“…Palaeogeographic re con struc tions and ba sin mod el ling suggest that in ver sion pro cesses re sulted in a re moval of some 1 to over 2 km of Up per Cre ta ceous de pos its from the Mid-Pol ish Swell, and the base of Zechstein was el e vated even by 4 km in the Kujavian seg ment Dadlez, 2001;Wagner et al, 2002;Resak et al, 2008). Deeply rooted fault systems, e.g., the Koszalin-Chojnice, Drawno-Cz³opa-Szamotu³y and Gop³o-Ponêtów-Wartkowice zones, were ac tive dur ing the sed i men ta tion and played a sig nif i cant role in the lithofacies dis tri bu tion (Dadlez and Marek, 1974;JaskowiakSchoeneichowa, 1976;Leszczyñski, 2002a, b).…”

“…The Late Cre ta ceous-early Paleogene struc tural in ver sion of the Mid-Pol ish Trough is widely dis cussed in re cent pa pers by Mazur et al (2005), Krzywiec (2006), Resak et al (2008) and Krzywiec et al (2009). (FIG.…”