Seismic stratigraphy based chronostratigraphy (SSBC) of the Serbian Banat region of the Pannonian Basin

Abstract

Seismic stratigraphy based chronostratigraphic (SSBC) analysis of the Serbian Banat region allows the delineation of the spatial and stratigraphic relationships of the generally regressive and shallowing upward Neogene depositional fill of a tectonically unstable central portion of the Pannonian Basin. When geometrically restored in time and space, the sediment dispersal directions, sediment source directions, types of sedimentation breaks and the tectonic events influencing basin evolution can be delineated. For such an analysis the timetransgressive lithostratigraphic units used in the neighbouring Hungarian part of the Pannonian Basin are conveniently introduced based upon their characteristic seismic facies and constrained borehole log records as mappable seismic stratigraphic sequence units, termed "seismic operational sequences". The respective Neogene stage and operational sequence equivalents (Hungarian lithostratigraphic units or formations) are the Middle Miocene (Badenian, Sarmatian), Upper Miocene-Lower Pliocene (Pannonian-Endrod and Szolnok Formations; Pontian-Algyo and Ujfalu Formations and Lower Pliocene-Zagyva Formation) and Upper PlioceneQuaternary (Nagyalfold Formation). SSBC analysis greatly assists in the geological constraint or "geovalidation" of interpreted seismic stratigraphic relationships and provides potentially critical insight into stratigraphic and structural problems of non-unique interpretations. In the specific case, using such an approach on previously unpublished regional seismic lines, SSBC analysis reveals that the Banat region has undergone structural inversion. This may be related to changes in local stress directions along strike slip faults, which initiated in earliest Late Miocene (Endrod Formation), culminating in the reverse tilting and incipient shortening of the western graben. Therefore during the time interval that the Badenian through Endrod sediments were deposited in the graben, autocyclic progradation initiated from the Kikinda Szeged High in the East followed by Szolnok, Algyo, Ujfalu and younger units prograding from the West as the central high uplifted relative to the graben. Such tectonic inversion has substantial hydrocarbon potential implications for exploration in the region.

The balance between orogenic building and subsequent extension during the Tertiary evolution of the NE Dinarides: Constraints from low-temperature thermochronology

“…This hypothesis is strongly supported by the two-steps extension derived from field kinematic studies (Toljić et al, submitted for publication). The exact geometry of the associated normal faults and kinematics is difficult to determine by our study due to the absence of subsurface data, but a series of major N-S oriented depocentres are observed E of the Fruška Gora (e.g., Pigott and Radivojević, 2010).…”

Az Endrődi Formáció kőzettani és palinológiai vizsgálata a Hódmezővásárhely–I fúrásban (Makói-árok) — őskörnyezeti és diagenezis-történeti értékelés

“…A vulkáni képződményekkel (bazalt és piroklasztit) közberétegződően, illetve annak fedőjében az Endrődi Formáció kőzetei azonosíthatók. Fontossága ellenére, a Szegedi-medence és a Makói-árok szerkezeti viszonyainak kialakulásában, illetve diagenezisében e vulkáni esemény hatása napjainkban sem ismert kielégítő szinten, noha a Makói-árok intenzív mélyülésének fő fázisa pannóniai (SZUROMI-KORECZ et al 2004, MAGYAR 2010, PIGOTT & RADIVOJEVIĆ 2010, MATENCO & RADIVOJEVIĆ 2012, BADA et al 2014.…”

Synrift and postrift miocene sediments of Northern Banat, Serbia

“…The mechanism of Pannonian Basin opening is explained in detail in the paper from Matenco and Radivojević (2012) and Radivojević (2014). Gradstein et al 2004;Rögl 1996;Vasiliev et al 2005Vasiliev et al , 2010Pigott and Radivojević 2010;Matenco and Radivojević 2012;Radivojević, 2014) 4.1.1. Undivided Lower Miocene…”

“…Sometimes it is possible to find sandstones with high glauconite content, even up to 30%. The clastic sediments often show a transition towards the limestone when the amount of carbonate increase, while the portion of clastic component drops (Pigott and Radivojević, 2010). Fossil fauna in these area were determined in last sixty years (Marković 1954(Marković -1984Buljan 1964Buljan -1983Čanović 1967Bogićević 2000Bogićević -2013Gajić 2000Gajić -2013) and featured with rare samples of shallow-water benthic foraminifera (Heterostegina, Amphistegina, Elphidium, Cibicides etc.…”

“…The recognition of these lithostratigraphic units is quite straightforward on well logs and seismic lines, given the huge difference between lithostratigraphic units (Pigott and Radivojević, 2010). Also, core material allows good correlation between well logs and depositional environment.…”