TY - JOUR AU - Sztanó, Orsolya AU - Balázs, Attila AU - Bartha, István Róbert AU - Ben Mahrez, Hana AU - Horányi, Anna AU - Kovács, Ádám AU - Šujan, Michal AU - Tőkés, Lilla AU - Törő, Balázs AU - Vallner, Fanni AU - Varga, Gábor AU - Magyar, Imre TI - Sedimentology, lithostratigraphy, paleogeography and water level changes in a lacustrine basin: the depositional model of Lake Pannon JF - GEOLOGICAL SOCIETY SPECIAL PUBLICATIONS J2 - GEOL SOC SPEC PUBL VL - 554 PY - 2025 IS - 1 SP - 1 SN - 0305-8719 DO - 10.1144/SP554-2024-72 UR - https://m2.mtmt.hu/api/publication/35728193 ID - 35728193 AB - Advances in sedimentology and basin analysis provide the foundation for a comprehensive basin-fill model and lithostratigraphic framework of Lake Pannon, Central Europe, highlighting the dynamical changes of the depositional environments. The lake's ca. 8 Myr long evolution began with transgression and deepening, followed by normal regression, forming up to 7 km thick sediment fill. Initial coarse-grained coastal deposits are overlain by offshore to deep-water marls, with varying carbonate- and organic-matter content and include both anoxic laminites and sediment gravity-flow deposits. Later confined and unconfined turbidite systems developed due to interactions between basin-floor relief and shelf-slope progradation. Stacked deltaic cycles followed by clayey alluvial plain deposits with anastomosing and meandering sandy channel fills comprise the upper part of the succession. Repeated aggradational to progradational clinothem architectures, thickness and distribution of muddy to sandy delta lobes on the shelf, and distribution of turbidite lobes in the deep basins reflect lake-level fluctuations. While climate primarily controlled lake level, coastal sedimentation is identified as a new factor driving long-term lake-level rise. Therefore, Lake Pannon's stratigraphy demonstrates that, in contrast to marine systems, in supply-dominated endorheic lakes accommodation space is created by sedimentation. LA - English DB - MTMT ER - TY - THES AU - Tőkés, Lilla TI - Scales of confinement and cyclicity in turbidite systems: illustrated by examples from the Pannonian Basin PB - Eötvös Loránd Tudományegyetem (ELTE) PY - 2024 SP - 171 DO - 10.15476/ELTE.2023.354 UR - https://m2.mtmt.hu/api/publication/36121649 ID - 36121649 LA - English DB - MTMT ER - TY - GEN AU - Ben Mahrez, Hana AU - Tőkés, Lilla AU - Mádlné Szőnyi, Judit AU - Sztanó, Orsolya TI - Hydrostratigraphical evaluation of deltaic to fluvial series based on spatial and temporal variations of seismic geomorphology, Pannonian Basin, Hungary CY - 2021-07-07 PY - 2021 UR - https://m2.mtmt.hu/api/publication/33148158 ID - 33148158 AB - This research focuses on the stratigraphic architecture and disposition of deltaic and fluvial sands within the Late Neogene Pannonian basin-fill succession in Eastern Hungary. The lithologies are identified from seismic interpretation and well logs evaluation, to develop a quantitative hydrostratigraphic classification of the sequence. Hydrostratigraphic divisions are based on the hydraulic conductivity of the rock bodies, depending primarily on the extent and connectivity (lateral and vertical) of sand bodies embedded in various muddy lithologies. Thus, we are going to build up a simplified 3D lithological model for the uppermost 1500 m of the basin fill succession, that will be transformed into hydrostratigraphic units and used in numerical flow models as hydraulic conductivity values. The change of depositional environments and the direction of the sediment flow during the Neogene-Quaternary is reflected in the spatial-temporal disposition of sand deposits and therefore appears as different hydrostratigraphic units in the model. The study region’s extent is approximately 50 x 40 km2 containing 5 merged three-dimensional seismic cubes covering the area. First, 7 master horizons, then several proportional slices were delineated in different attribute maps (e.g. amplitude, Root Mean Square amplitude, similarity variance, dominant frequency). The purpose of attribute maps is to investigate the seismic geomorphological features and their associated depositional environments. Basic wireline logs (gamma, spontaneous potential) from 119 wells were interpreted simply in terms of sand, mud, and heterolithic muddy-sand, and finally were tied to the seismic cube. The combination of these two methods: seismic geomorphology and lithology extraction from well logs allows the identification of sandy deltaic lobes, sandy fluvial channel belts, and the muddy flood plains. Based on the lateral extension and density of sand lithology, percentages of sand vs clay (net-to-gross; N/G) as well as sand connectivity percentages were determined. Above the deltaic succession, a fluvial depositional environment takes place and can be divided into units. Starting by a meandering system, with 500-3600 m wide channel belts and therefore a high N/G. Then, a transition into an anastomosing river system is observed, it is characterized by channels about 100-200 m wide, with lower N/G ratios and less connectedness. In the upper part of the fluvial succession, the large meandering channel belts returned to the area. These changes in river style and paleo-hydrography affect the sand and clay ratio and their connectivity; therefore, the previous hydrostratigraphic units’ decomposition must be reconsidered. LA - English DB - MTMT ER - TY - JOUR AU - Tőkés, Lilla AU - Bartha, István Róbert AU - Silye, Lóránd AU - Krézsek, Cs AU - Sztanó, Orsolya TI - Multiple-scale incision-infill cycles in deep-water channels from the lacustrine Transylvanian Basin, Romania: auto- or allogenic controls? JF - GLOBAL AND PLANETARY CHANGE J2 - GLOBAL PLANET CHANGE VL - 202 PY - 2021 SN - 0921-8181 DO - 10.1016/j.gloplacha.2021.103511 UR - https://m2.mtmt.hu/api/publication/32000520 ID - 32000520 N1 - The project was supported by the Papp Simon Foundation, the Koch Antal Geological Society and the Hungarian National Research, Development and Innovation Office (NKFI) 116618. Lóránd Silye thanks the Alexander von Humboldt Foundation for the funding of his research stay in Bremen, where he was working on this paper. LA - English DB - MTMT ER - TY - JOUR AU - Nyíri, Dániel AU - Tőkés, Lilla AU - Zadravecz, Csilla AU - Fodor, László TI - Early post-rift confined turbidite systems in a supra-detachment basin: Implications for the early to middle Miocene basin evolution and hydrocarbon exploration of the Pannonian Basin JF - GLOBAL AND PLANETARY CHANGE J2 - GLOBAL PLANET CHANGE VL - 203 PY - 2021 PG - 24 SN - 0921-8181 DO - 10.1016/j.gloplacha.2021.103500 UR - https://m2.mtmt.hu/api/publication/31999783 ID - 31999783 N1 - MOL Hungarian Oil and Gas Plc, Budapest, Hungary Department of Physical and Applied Geology, ELTE Eötvös Loránd University, Budapest, Hungary MTA-ELTE Geological Geophysical and Space Science Research Group, Budapest, Hungary Cited By :2 Export Date: 4 July 2022 CODEN: GPCHE Correspondence Address: Nyíri, D.; MOL Hungarian Oil and Gas PlcHungary; email: nyiri.daniel.94@gmail.com LA - English DB - MTMT ER - TY - CONF AU - Ben Mahrez, Hana AU - Tőkés, Lilla AU - Molson, John AU - Mádlné Szőnyi, Judit AU - Sztanó, Orsolya TI - From seismic geomorphology to hydrostratigraphic units: spatial and temporal variations of deltaic to fluvial architecture, Pannonian Basin, Hungary T2 - EGU General Assembly 2021: Conference Abstracts PB - European Geosciences Union (EGU) C1 - München PY - 2021 UR - https://m2.mtmt.hu/api/publication/31937912 ID - 31937912 AB - This study focuses on the stratigraphic architecture of deltaic and fluvial sand lithologies within the Late Neogene Pannonian basin-fill succession in Hungary, identified from seismic and well data, in order to develop a quantitative hydrostratigraphic classification of the sequence. Hydrostratigraphic divisions are based on the hydraulic conductivity of the rock bodies, which depends on their extent, i.e. the thickness and the spatial distribution, as well as the lateral and vertical connectivity of sand bodies embedded in various muddy lithologies. Thus, we are going to build a simplified 3D lithological model for the uppermost 1500 m of the basin fill succession, that can later be transformed into hydrostratigraphic units and hydraulic conductivity values applied in a numerical flow model. The depositional environments change from deltaic to fluvial and within the fluvial system the environment alternates between meandering and anastomosing. These intervals will appear as different hydrostratigraphic units in the model. In our work-flow, a merged three-dimensional seismic cube covering an area of approximately 50 x 40 km2 was analyzed: 7 master horizons and several proportional slices were delineated in different attribute maps (e.g. amplitude, Root Mean Square amplitude, symmetry, similarity). These maps were generated to investigate the seismic geomorphological features and their associated depositional environments. Rock bodies were defined on the planform geometry of seismic attributes. Basic wireline logs (gamma, spontaneous potential, and resistivity) from 237 wells were interpreted simply in terms of sand, mud and heterolithic muddy-sand, and finally were tied to the seismic cube. Lithology of rock bodies was determined with the help of well data. With this method, sandy deltaic lobes, sandy fluvial channel belts, and the muddy flood plains were identified. Based on the extension and density of sand bodies, percentages of sand vs clay (net-to-gross; N/G) as well as sand connectivity percentages were determined. Above the deltaic succession, the fluvial depositional setting can be divided into three minor units. These units start with a meandering system, with 500-3600 m wide channel belts and a relatively high N/G. For an interval in the Pliocene about 350 m thick, a transition into an anastomosing river system is observed. This unit is characterized by channels about 100-200 m wide, with significantly lower N/G ratios and less connectedness. In the uppermost part of the succession, large meandering channel belts returned to the area. These changes in river style and paleo-hydrography affect the sand and clay ratio and their connectivity; therefore, definition of previous hydrostratigraphic units must be reconsidered. LA - English DB - MTMT ER - TY - CONF AU - Tőkés, Lilla AU - Bartha, István Róbert AU - Silye, Lóránd AU - Krézsek, Csaba AU - Sztanó, Orsolya ED - Kövér, Szilvia ED - Balázs, Attila ED - Fodor, László TI - Cycles of erosion, aggradation and abandonment: architecture of deep-water channels and lobes, Transylvanian Basin, Romania T2 - ILP 2019 :14th Workshop of the International Lithosphere Program Task Force Sedimentary Basins : abstracts C1 - Hévíz PY - 2019 SP - 179 EP - 181 PG - 3 UR - https://m2.mtmt.hu/api/publication/33789815 ID - 33789815 LA - English DB - MTMT ER - TY - CONF AU - Tőkés, Lilla AU - Patacci, Marco TI - Quantifying Tabularity of Turbidite Beds: Methodology and Applications T2 - AAPG Search and Discovery #90323 PB - American Association of Petroleum Geologists (AAPG) T3 - AAPG Datapages / Search and Discovery ; 90323. PY - 2018 UR - https://m2.mtmt.hu/api/publication/31205938 ID - 31205938 LA - English DB - MTMT ER - TY - JOUR AU - Tőkés, Lilla AU - Patacci, Marco TI - Quantifying tabularity of turbidite beds and its relationship to the inferred degree of basin confinement JF - MARINE AND PETROLEUM GEOLOGY J2 - MAR PETROL GEOL VL - 97 PY - 2018 SP - 659 EP - 671 PG - 13 SN - 0264-8172 DO - 10.1016/j.marpetgeo.2018.06.012 UR - https://m2.mtmt.hu/api/publication/30320603 ID - 30320603 N1 - Funding Agency and Grant Number: Tempus Public Foundation (Campus Mundi Student Mobility) [CM-SMR/140014/2016]; Papp Simon Foundation\n Funding text: Financial support for a study programme at Leeds University for Lilla Tokes was received from the Tempus Public Foundation (Campus Mundi Student Mobility, grant number CM-SMR/140014/2016) and the Papp Simon Foundation. Marco Fonnesu is thanked for providing informal feedback to an earlier version of this manuscript. We thank two anonymous reviewers for their constructive criticism that greatly improved the manuscript.\n AB - Tabular beds and sheet-like deposits in deep-water systems have been the subject of much research attention; they can form high quality hydrocarbon reservoirs, owing to their excellent lateral continuity and predictable geometry. Additionally, deposit tabularity is a piece of evidence used to infer flow confinement in ancient systems and thus to evaluate the suitability of outcrop datasets as reservoir analogues. However, the quantification of tabularity is rarely attempted and a consistent definition on how to describe it quantitatively is lacking. For this study, published data from eighteen well-constrained ancient turbidite systems in outcrop were analysed. A simple and novel methodology for the quantitative calculation of tabularity along a transect from log panels and photo panels was devised, based on: a) subdividing beds into two groups based on their thickness, b) calculating the percentage of beds continuous across a fixed window (500 m) and c) calculating the rate of thinning for the continuous beds within the same window. Calculations obtained from multiple locations within individual systems enable the investigation of proximal to distal, and axial to lateral changes in tabularity to be captured, and therefore permits the evaluation of tabularity in three-dimensions. A comparison between tabularity of the considered systems and their inferred degree of basin confinement shows that in the confined systems >= 90% of beds are continuous over 500 m compared to <= 40% for the two unconfined systems studied. In addition, different bed types were compared: hybrid event bed thinning rates are shown to be up to three times those of classical turbidites. This methodology provides a new tool to compare tabularity within and between systems quantitatively. It is hoped that the quantitative determination of tabularity will become a common workflow when describing ancient turbidite systems. It is suggested that this approach will enhance the value of outcrop data to inform models capturing the architecture of systems analogous to subsurface hydrocarbon reservoirs. LA - English DB - MTMT ER - TY - JOUR AU - Balázs, Attila AU - Magyar, Imre AU - Matenco, Liviu AU - Sztanó, Orsolya AU - Tőkés, Lilla AU - Horváth, Ferenc TI - Morphology of a large paleo-lake: Analysis of compaction in the Miocene-Quaternary Pannonian Basin JF - GLOBAL AND PLANETARY CHANGE J2 - GLOBAL PLANET CHANGE VL - 171 PY - 2018 SP - 134 EP - 147 PG - 14 SN - 0921-8181 DO - 10.1016/j.gloplacha.2017.10.012 UR - https://m2.mtmt.hu/api/publication/3309809 ID - 3309809 AB - Abstract Lake-floor morphologies may be significantly different from seafloor topographies of other basins, typically observed in passive or active continental margins. The bathymetry of large paleo-lakes is often overwritten by subsequent tectonic evolution, burial beneath thick overburden and inherent compaction effects. We study the evolution of such an initial underfilled, balance fill and finally overfilled large paleo-lake basin by the interpretation of 2D and 3D seismic data set corroborated with calibrating wells in the example of the Neogene Pannonian Basin of Central Europe. Lake Pannon persisted for about 7–8Myr and was progressively filled by clastic material sourced by the surrounding mountain chains and transported by large rivers, such as the paleo-Danube and paleo-Tisza. We combined sedimentological observations with a backstripping methodology facilitated by well lithology and porosity data to gradually remove the sediment overburden. This approach has resulted in a morphological reconstruction of the former depositional surfaces with special focus on the prograding shelf-margin slopes. Our calculations show that the water depth of the lake was more than 1000m in the deepest sub-basins of the Great Hungarian Plain of the Pannonian Basin. The significant compaction associated with lateral variations of Neogene sediment thicknesses has created non-tectonic normal fault offsets and folds. These features have important effects on fluid migration and hydrocarbon trapping. We furthermore compare the geometries and effects of such non-tectonic features with the activity of larger offset sinistral strike-slip zones using 3D seismic attributes. LA - English DB - MTMT ER -