TY - JOUR AU - Krezsek, C AU - Filipescu, S AU - Silye, Lóránd AU - Matenco, L AU - Doust, H TI - Miocene facies associations and sedimentary evolution of the Southern Transylvanian Basin (Romania): Implications for hydrocarbon exploration JF - MARINE AND PETROLEUM GEOLOGY J2 - MAR PETROL GEOL VL - 27 PY - 2010 IS - 1 SP - 191 EP - 214 PG - 24 SN - 0264-8172 DO - 10.1016/j.marpetgeo.2009.07.009 UR - https://m2.mtmt.hu/api/publication/2588298 ID - 2588298 AB - The Transylvanian Basin is a mature hydrocarbon province of Romania characterized by two petroleum systems: Mesozoic (thermogenic) and Miocene (biogenic). An extensive outcrop-based sedimentological and micropaleontological study correlated to seismic and well data discusses the elements of the Miocene petroleum system. The facies associations are indicative of alluvial, fandelta, shallow- and deep-marine settings. These are grouped into four different depositional systems (evaporite, mud-carbonate, sand-mud and sand-gravel). Their evolution in time and space shows large differences between various parts of the basin that have important consequences for exploration. The Transylvanian gas is formed by more than 99% methane of bacterial origin. This is sourced by low quality (<1% TOC) deep-marine shales. The shales contain Type II and Type III kerogen. The organic material is thermally immature. The best source rocks were deposited during major transgressions in the central-eastern parts of the basin. In general, reservoir quality is the best (porosity < 20%, permeability < 1 D) in the basin center, where reservoirs are deep-marine turbidite sandstones. Lower quality reservoirs are conglomerate-rich slope channels and various shallow-marine sandstones located near the basin margins. The seals are formed by shales that hold gas columns of up to 60 m. The most common structural traps are in 4-way dip closures related to salt-cored folds. Their timing is coeval with the late (post-Pannonian) exhumation of the basin and strongly linked to coeval salt tectonics. This requires a late charge and migration. The largest traps typically have multistory (up to 20) pay zones with a total of 100 BCF to 1 TCF reserves. Exploration to date has focused on structural traps, but most of the obvious structures have been drilled. It is argued that significant exploration potential lies in stratigraphic plays, including confined submarine fans, slope channels, detached lowstand prograding wedges, incised valleys, diapir flanks, salt-tectonics related unconformities and various sub-volcanic plays. Risks of the petroleum system elements associated to these plays in different areas of the basin are discussed. (C) 2009 Elsevier Ltd. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Schuller, V AU - Frisch, W AU - Danisik, M AU - Dunkl, István AU - Melinte, MC TI - UPPER CRETACEOUS GOSAU DEPOSITS OF THE APUSENI MOUNTAINS (ROMANIA) - SIMILARITIES AND DIFFERENCES TO THE EASTERN ALPS JF - AUSTRIAN JOURNAL OF EARTH SCIENCES J2 - AUST J EARTH SCI VL - 102 PY - 2009 IS - 1 SP - 133 EP - 145 PG - 13 SN - 0251-7493 UR - https://m2.mtmt.hu/api/publication/20759927 ID - 20759927 LA - English DB - MTMT ER - TY - JOUR AU - Gábris, Gyula AU - Nádor, Annamária TI - Long-term fluvial archives in Hungary: response of the Danube and Tisza rivers to tectonic movements and climatic changes during the Quaternary: a review and new synthesis JF - QUATERNARY SCIENCE REVIEWS J2 - QUATERN SCI REV VL - 26 PY - 2007 IS - 22-24 SP - 2758 EP - 2782 PG - 25 SN - 0277-3791 DO - 10.1016/j.quascirev.2007.06.030 UR - https://m2.mtmt.hu/api/publication/1135543 ID - 1135543 AB - The paper discusses the Quaternary evolution of the Danube and Tisza rivers and their main tributaries in the context of evolution of the entire Pannonian Basin, which is Europe's largest intramontane basin, within the Alp-Carpathian orogen. The palaeo-drainage reconstruction of the Pannonian Basin for the pre-Quaternary period is Outlined in connection with the gradual regression of Lake Pannon since the Late Miocene. Deltas of rivers that entered the basin from the northwest and northeast were gradually transformed into extended alluvial plains; thus, the earliest possible ancestor of the Danube coming southeastwards from the Alps could be as old as Late Miocene. By the Pliocene the whole Lake Parnnon was infilled. The former extensional basin formation was replaced by a compresional stress field, which resulted in an uplift of the marginal flanks and late-stage subsidence anomalies. The increasing relief led to the formation of the Quaternary drainage pattern. The actively subsiding young basins were filled by fluvial sediments, transported by the Danube and Tisza river systems from the uplifting mountains. Between the subsiding regions of the Little and Great Plains, the Danube has formed an antecedent valley with terrace staircases between the uplifting sections of the Transdanubian Range and the North Midmountains. The formation of the terraces is attributed to periodic climate changes during the Pleistocene combined with differences in the uplift rate. The paper gives a complex overview of the classical chronology of the six terraces based on various data sources: mostly dating of loess/paleosol sequences, travertines, aeolian sand, and tephra strata overlying the fluvial sediments, complemented by scattered vertebrate faunal data and archaeological evidence directly from the terrace sediments. The Quaternary drainage pattern evolution of the Great Plain, with a strong tectonic control, is discussed in detail. Rivers originating from the uplifting marginal areas were drawn towards the subsiding depressions which served as local base level. Changes in subsidence rates in space and time throughout the Quaternary resulted in the evolution of a complex drainage pattern. A special emphasis is placed on the Late Pleistocene-Holocene development of the Middle-Tisza region and the Koros basin, where the Berettyo-Koros Rivers form an eastern tributary system of the Tisza River. A comparative evaluation of these two areas is especially relevant, as they provide insights into large-scale Late Pleistocene avulsion of the Tisza River. OSL dating, complemented with inferred transport directions determined from heavy mineral analysis of fluvial sediments in the Koros basin, has revealed an ancient large meandering river system that can be identified with the palaeo-Tisza, which was flowing along a tectonically controlled depression during the Late Pleniglacial. Successions in the Middle Tisza region have allowed differentiation between the older channels of the palaeo-Bodrog River and the Sajo-Hernad alluvial fan and the younger meander belts of the new course of the Tisza. In the Tisza system, changes in river style (braided to various scales of meandering) show correspondence to millennial-scale climate changes of the last 25 ka, while in the Koros basin the effects of tectonics are overprinted onto the regional climatic signals. (c) 2007 Elsevier Ltd. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Juhasz, G AU - Pogácsás, György AU - Magyar, Imre AU - Vakarcs, G TI - Tectonic versus climatic control on the evolution of fluvio-deltaic systems in a lake basin, Eastern Pannonian Basin JF - SEDIMENTARY GEOLOGY J2 - SEDIMENT GEOL VL - 202 PY - 2007 IS - 1-2 SP - 72 EP - 95 PG - 24 SN - 0037-0738 DO - 10.1016/j.sedgeo.2007.05.001 UR - https://m2.mtmt.hu/api/publication/1890256 ID - 1890256 N1 - Department of Basin Analysis, Geological Institute of Hungary, Stefánia st.14, Budapest, H-1143, Hungary Department of Applied and Environmental Geology, Eötvös Lóránd University, Pazmany P. sétány 5, Budapest, H-1117, Hungary MOL Hungarian Oil and Gas Co., Batthyány út 45, Budapest, H-1039, Hungary Cited By :72 Export Date: 22 January 2024 Correspondence Address: Juhász, Gy.; Department of Basin Analysis, Stefánia st.14, Budapest, H-1143, Hungary; email: juhasz@mafi.hu AB - The Pannonian Basin is a back-arc lake basin, situated inside the Central European Carpathian loop, surrounded by the orogenic, belts of the Eastern Alps, Carpathians and Dinarides. Integrated stratigraphical and sedimentological research reported here focuses on palaeogeographical evolution, and particularly the response of the fluvio-deltaic systems to climatic and tectonic controls in the Late-Neogene sedimentary succession, in the eastern part of the Pannonian Basin. This work has been carried out using subsurface data including regional composite seismic profiles and well-logs. Dip sections were studied to define the stratigraphical A architecture, depositional environments and sequence stratigraphy, and to interpret the sedimentary evolution of the area. The eastern Pannonian Basin is characterized by sediment input from the north-east which was one of the main routes of the fluvial-deltaic systems entering and progressively filling Lake Pannon from 11.6-2.6 Ma. The formations studied were deposited in environments that ranged from the deep-water basin plain, slope, delta front, and coastal plain to alluvial plain, causing the deposition of characteristic lithofacies associations, and characteristic biofacies. These form laterally continuous lithofacies units that can be correlated through the basin. All depositional facies units have considerable thicknesses (300-1000 m) in the deepest parts of the sub-basins. Sequence stratigraphical interpretation was carried out correlating 3rd and 4th-order sequences (Ma to ky in range) through a regional composite seismic profile network in the dip direction. Stratigraphical architecture and sedimentary facies indicate that the 3rd-order cycles were controlled by tectonic driving forces, while 4th-order cycles were probably driven by large-scale climatic A changes within the Milankovitch band. In the 3rd-order time interval Pa-3 between 9.1 and 6.8 Ma, a major tectonostratigraphic event occurred, highlighting the role of strike-slip faulting-related transtensional subsidence in the Derecske sub-basin, A superimposed on the regional post-rift thermal subsidence of the Eastern Pannonian region. The substantial base level fall at SB Pa-4 at 6.8 Ma (over 200 m, perhaps amplified by subsequent tectonic movements) can be related to the onset of a new compressional phase of structural evolution in the basin. (c) 2007 Elsevier B.V. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Márton Péterné Szalay, Emőke AU - Tischler, M AU - Csontos, L AU - Fügenschuh, B AU - Schmid, S M TI - The contact zone between the ALCAPA and Tisza-Dacia megatectonic units of Northern Romania in the light of new paleomagnetic data JF - ECLOGAE GEOLOGICAE HELVETIAE J2 - ECLOGAE GEOL HELV VL - 100 PY - 2007 IS - 1 SP - 109 EP - 124 PG - 16 SN - 0012-9402 DO - 10.1007/s00015-007-1205-5 UR - https://m2.mtmt.hu/api/publication/1155742 ID - 1155742 N1 - Paleomagnetic Laboratory, Eötvös Loránd Geophysical Institute of Hungary, Columbus 17-23, Budapest H-1145, Hungary Geologisch-Paläontologisches Institut, Basel University, Bernoullistr. 32, Basel CH-4056, Switzerland Physical and Historical Geology, ELTE University, Pazmany Peter setany 1/C, Budapest H-1117, Hungary Institute for Geology and Paleontology, Innsbruck University, Innrain 52f, Innsbruck A-6020, Austria Cited By :47 Export Date: 5 December 2022 Correspondence Address: Márton, E.; Paleomagnetic Laboratory, Columbus 17-23, Budapest H-1145, Hungary LA - English DB - MTMT ER - TY - CHAP AU - Horváth, Ferenc AU - Bada, G AU - Szafian, P AU - Tari, G AU - Ádám, Antal AU - Cloetingh, S ED - Gee, DG ED - Stephenson, RA TI - Formation; deformation of the Pannonian basin: Constraints from observational data T2 - European Lithosphere Dynamics PB - Geological Society of London CY - London SN - 9781862392120 T3 - Geological Society Memoirs ; 32. PY - 2006 SP - 191 EP - 206 PG - 16 UR - https://m2.mtmt.hu/api/publication/1857463 ID - 1857463 LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Ferenc AU - Bada, G AU - Szafián, P AU - Tari, Gábor AU - Ádám, A AU - Cloetingh, S TI - Formation and deformation of the Pannonian Basin: Constraints from observational data JF - MEMOIRS OF THE GEOLOGICAL SOCIETY OF LONDON J2 - MEM GEOL SOC LOND VL - 32 PY - 2006 SP - 191 EP - 206 PG - 16 SN - 9781862392120 SN - 0435-4052 DO - 10.1144/GSL.MEM.2006.032.01.11 UR - https://m2.mtmt.hu/api/publication/2176402 ID - 2176402 N1 - Megjegyzés-22854802 BE Stephenson, RA AB - The past decade has witnessed spectacular progress in the collection of observational data and their interpretation in the Pannonian Basin and the surrounding Alpine, Carpathian and Dinaric mountain belts. A major driving force behind this progress was the PANCARDI project of the EUROPROBE programme. The paper reviews tectonic processes, structural styles, stratigraphic records and geochemical data for volcanic rocks. Structural and seismic sections of different scales, seismic tomography and magnetotelluric, gravity and geothermal data are also used to determine the deformational styles, and to compile new crustal and lithospheric thickness maps of the Pannonian Basin and the surrounding fold-and-thrust belts. The Pannonian Basin is superimposed on former Alpine terranes. Its formation is a result of extensional collapse of the overthickened Alpine orogenic wedge during orogen-parallel extrusion towards a 'free boundary' offered by the roll-back of the subducting Carpathian slab, As a conclusion, continental collision and back-arc basin evolution is discussed as a single, complex dynamic process, with minimization of the potential and deformational energy as the driving principle. © The Geological Society of London 2006. LA - English DB - MTMT ER - TY - JOUR AU - Csontos, L AU - Vörös, Attila TI - Mesozoic plate tectonic reconstruction of the carpathian region JF - PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY J2 - PALAEOGEOGR PALAEOCL VL - 210 PY - 2004 IS - 1 SP - 1 EP - 56 PG - 56 SN - 0031-0182 DO - 10.1016/j.palaeo.2004.02.033 UR - https://m2.mtmt.hu/api/publication/1236932 ID - 1236932 N1 - Cited By :483 Export Date: 11 November 2022 CODEN: PPPYA Correspondence Address: Csontos, L.; Geological Department, Pazmany P: setany 1/a, Budapest 1117, Hungary; email: csontos@ludens.elte.hu Funding details: Hungarian Science Foundation, T 037595, T 043760 Funding text 1: The authors are indebted to many colleagues for the discussions of earlier oral and written versions of the manuscript. We would like to thank especially F. Horváth, A. Galácz, S. Kovács, M. Kázmér, E. Márton (Budapest), D. Plašienka, M. Kováč (Bratislava), F. Neubauer and Č. Tomek (Salzburg), K. Birkenmajer (Kraków), M. Săndulescu (Bucharest) S. Schmid (Basel) and P. Ziegler (Basel). We express our thanks to W. Frisch, F. Horváth, G. Stampfli, Alonso-Gutierrez, J. Von Raumer, B. Murphy, A. Collins and D. Nance who kindly revised and improved earlier versions of the manuscript. This version was helped by critical remarks of K. Birkenmajer, F. Neubauer, B. Sperner, G. Stampfli, and F. Surlyk. IGCP project 453 is gratefully thanked for moral and material support. Hungarian Science Foundation OTKA projects T 043760, T 037595 are also thanked for support. AB - Palaeomagnetic, palaeobiogeographic and structural comparisons of different parts of the Alpine-Carpathian region suggest that four terranes comprise this area: the Alcapa, Tisza, Dacia and Adria terranes. These terranes are composed of different Mesozoic continental and oceanic fragments that were each assembled during a complex Late Jurassic-Cretaceous Palaeogene history. Palaeomagnetic and tectonic data suggest that the Carpathians are built up by two major oroclinal bends. The Alcapa bend has the Meliata oceanic unit, correlated with the Dinaric Vardar ophiolite, in its core. It is composed of the Western Carpathians, Eastern Alps and Southern Alcapa units (Transdanubian Range, Bukk). This terrane finds its continuation in the High Karst margin of the Dinarides. Further elements of the Alcapa terrane are thought to be derived from collided microcontinents: Czorsztyn in the N and a carbonate unit (Tisza?) in the SE. The Tisza-Dacia bend has the Vardar oceanic unit in its core. It is composed of the Bihor and Getic microcontinents. This terrane finds its continuation in the Serbo-Macedonian Massif of the Balkans. The Bihor-Getic microcontinent originally laid east of the Western Carpathians and filled the present Carpathian embayment in the Late Palaeozoic-Early Mesozoic. The Vardar ocean occupied an intermediate position between the Western Carpathian-Austroalpine-Transdanubian-High Karst margin and the Bihor-Getic-Serbo-Macedonian microcontinent. The Vardar and Pindos oceans were opened in the heart of the Mediterranean-Adriatic microcontinent in the Late Permian-Middle Triassic. Vardar subducted by the end of Jurassic, causing the Bihor-Getic-Serbo-Macedonian microcontinent to collide with the internal Dinaric-Western Carpathian margin. An external Penninic-Vahic ocean tract began opening in the Early Jurassic, separating the Austroalpine-Western Carpathian microcontinent (and its fauna) from the European shelf. Further east, the Severin-Ceahlau-Magura also began opening in the Early Jurassic, but final separation of the Bihor-Getic ribbon (and its fauna) from the European shelf did not take place until the late Middle Jurassic. The Alcapa and the Tisza-Dacia were bending during the Albian-Maastrichtian. The two oroclinal bends were finally opposed and pushed into the gates of the Carpathian embayment during the Palaeogene and Neogene. At that time, the main NS shortening in distant Alpine and Hellenic sectors was linked by a broader right-lateral shear zone along the former Vardar suture. (C) 2004 Elsevier B.V. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Haas, János AU - Péró, Csaba TI - Mesozoic evolution of the Tisza Mega-unit JF - INTERNATIONAL JOURNAL OF EARTH SCIENCES J2 - INT J EARTH SCI VL - 93 PY - 2004 IS - 2 SP - 297 EP - 313 PG - 17 SN - 1437-3254 DO - 10.1007/s00531-004-0384-9 UR - https://m2.mtmt.hu/api/publication/1019054 ID - 1019054 N1 - Cited By :137 Export Date: 11 November 2022 CODEN: IJESF Correspondence Address: Haas, J.; Geological Research Group, , Budapest 1117, Hungary; email: haas@ludens.elte.hu Funding details: Hungarian Scientific Research Fund, OTKA, T037595 Funding details: Magyar Tudományos Akadémia, MTA Funding text 1: Acknowledgement This study was supported by the Hungarian Academy of Sciences and the Hungarian Scientific Research Fund (OTKA Project T037595) The authors thank Professor Stefan Schmid and S ndor Kov cs for helpful discussions and comments. We are much obliged to Professor Wolfgang Frisch and Professor Peter Faupl for their careful and constructive reviews. Authors are indebted to Henry Lieberman (Houston, USA) for the lingual corrections. LA - English DB - MTMT ER - TY - JOUR AU - Rosu, E AU - Seghedi, I AU - Downes, H AU - Alderton, DHM AU - Szakács, A AU - Pécskay, Zoltán AU - Panaiotu, C AU - Panaiotu, CE AU - Nedelcu, L TI - Extension-related Miocene calc-alkaline magmatism in the Apuseni Mountains, Romania: Origin of magmas JF - SCHWEIZERISCHE MINERALOGISCHE UND PETROGRAPHISCHE MITTEILUNGEN J2 - SCHWEIZ MINER PETROG VL - 84 PY - 2004 SP - 153 EP - 172 PG - 20 SN - 0036-7699 UR - https://m2.mtmt.hu/api/publication/149304 ID - 149304 N1 - [P19065 ATKI2004/0002] Megjegyzés-24076663 : Ioan/0000-0001-7381-7802 Megjegyzés-23316068 : Ioan/0000-0001-7381-7802 AB - The Miocene magmatism of the Apuseni Mountains in the Carpatho-Parmonian area hosts some of Europe's largest porphyry epithermal Cu-Au ore systems associated with shallow subvolcanic intrusions. Detailed field observations combined with K-Ar ages, geochemical analyses, Sr-Nd isotopes and paleomagnetic data constrain a model for the geotectonic evolution and processes of melt generation that may account for the exceptional mineralizing potential of the magmatic activity in this region. The magmatic activity developed mainly between 14.7 and 7.4 Ma and after a gap ceased at around 1.6 Ma. Geotectonic conditions do not support contemporaneous subduction processes, but were represented by transtensional and rotational tectonics, which generated horst and graben structures and favoured the generation and ascent of magmas. The "subduction signature" of the magmas emphasizes the significant involvement of fluids (mantle lithosphere and/or lower crust) inherited during previous geodynamic events. The mechanism of magmagenesis is considered to be related to decompressional melting (various degrees of) of a heterogeneous source situated at the crust-lithosphere mantle boundary. Mixing with asthenospheric melts generated during the extension-related attenuation of the lithosphere may also be implied. The evolution from normal to adakitic-like calc-alkaline and alkaline magmas generally is time-dependent as a consequence of variable fluid-present melting. Fractional crystallization-assimilation processes in shallow magma chambers are suggested for early magmatism but were almost absent from later magmatism, which related to an increasingly extensional regime. The youngest alkalic (shoshonitic) magmatism (1.6 Ma) is asthenosphere-derived, but in a different extensional event, being almost coeval with the OIB-like alkali-basaltic magmatism (2.5 Ma) occurring along the South Transylvanian fault. The fluid-present melting of the source seems to be the critical factor for the presence of the copper-gold-bearing mineralizing fluids. LA - English DB - MTMT ER - TY - JOUR AU - Csontos, L AU - Márton Péterné Szalay, Emőke AU - Wórum, G AU - Benkovics, L TI - Geodynamics of SW-Pannonian inselbergs (Mecsek and Villány Mts, SW Hungary): inferences from a complex structural analysis JF - EGU STEPHAN MUELLER SPECIAL PUBLICATION SERIES J2 - EGU STEPHAN MUELLER SPEC PUBL SER VL - 3 PY - 2002 SP - 1 EP - 19 PG - 19 SN - 1868-4556 UR - https://m2.mtmt.hu/api/publication/1155431 ID - 1155431 LA - English DB - MTMT ER - TY - JOUR AU - Dunkl, István TI - Trackkey: a Windows program for calculation and graphical presentation of fission track data JF - COMPUTERS & GEOSCIENCES J2 - COMPUT GEOSCI-UK VL - 28 PY - 2002 IS - 1 SP - 3 EP - 12 PG - 10 SN - 0098-3004 DO - 10.1016/S0098-3004(01)00024-3 UR - https://m2.mtmt.hu/api/publication/31953763 ID - 31953763 LA - English DB - MTMT ER - TY - CHAP AU - Fodor, László AU - Csontos, L AU - Bada, G AU - Györfi, I AU - Benkovics, L ED - Durand, B ED - Jolivet, L ED - Horváth, Ferenc ED - Seranne, M TI - Tertiary tectonic evolution of the Pannonian Basin system and neighbouring orogens: a new synthesis of palaeostress data T2 - The Mediterranean Basins: tertiary extension within the Alpine Orogen PB - Geological Society of London CY - London SN - 9781862390331 T3 - Geological Society Special Publication, ISSN 0305-8719 ; 156. PY - 1999 SP - 295 EP - 334 PG - 40 DO - 10.1144/GSL.SP.1999.156.01.15 UR - https://m2.mtmt.hu/api/publication/1369059 ID - 1369059 N1 - Dept. of Appl. and Environ. Geology, Eötvös University, 1088 Múzeum krt 4/a, Budapest, Hungary Dept. of Gen. and Historical Geology, Eötvös University, 1088 Múzeum krt 4/a, Budapest, Hungary Department of Geophysics, Eötvös University, 1085 Ludovika tér 2, Budapest, Hungary Department of Engineering Geology, Technical University of Budapest, Stoczek u. 2, Budapest, Hungary Cited By :375 Export Date: 10 May 2023 Correspondence Address: Fodor, L.; Dept. of App. + Envtml. Geol., Muzeum krt 4/a, Budapest 1088, Hungary LA - English DB - MTMT ER - TY - JOUR AU - Tari, Gábor AU - Dövényi, Péter AU - Dunkl, István AU - Horváth, Ferenc AU - Lenkey, László AU - Szafian, P AU - Toth, T TI - Lithospheric structure of the Pannonian basin derived from seismic, gravity and geothermal data JF - GEOLOGICAL SOCIETY SPECIAL PUBLICATIONS J2 - GEOL SOC SPEC PUBL VL - 156 PY - 1999 SP - 215 EP - 250 PG - 36 SN - 0305-8719 DO - 10.1144/GSL.SP.1999.156.01.12 UR - https://m2.mtmt.hu/api/publication/1256307 ID - 1256307 AB - This paper is part of the special publication No.156, The Mediterranean basins: Tertiary extension within the Alpine Orogen. (eds B.Durand, L. Jolivet, F.Horvath and M.Seranne). The structure of the Pannonian basin is the result of distinct modes of Mid-Late Miocene extension exerting a profound effect on the lithospheric configuration, which continues even today. As the first manifestation of extensional collapse, large magnitude, metamorphic core complex style extension took place at the beginning of the Mid-Miocene in certain parts of the basin. Extrapolation of the present-day high heat flow in the basin, corrected for the blanketing effect of the basin fill, indicates a hot and thin lithosphere at the onset of extension. This initial condition, combined with the relatively thick crust inherited from earlier Alpine compressional episodes, appears to be responsible for the core complex type extension at the beginning of the syn-rift period. This type of extension is well documented in the northwestern Pannonian basin. Newly obtained deep reflection seismic and fission-track data integrated with well data from the southeastern part of the basin suggests that it developed in a similar fashion. Shortly after the initial period, the style of syn-rift extension changed to a wide-rift style, covering an area of much larger geographic extent. The associated normal faults revealed by industry reflection seismic data tend to dominate within the upper crust, obscuring pre-existing structures. However, several deep seismic profiles, constrained by gravity and geothermal modeling, image the entire lithosphere beneath the basin. It is the Mid-Miocene synrift extension which is still reflected in the structure of the Pannonian lithosphere, on the scale of the whole basin system. The gradually diminishing extension during the Late Miocene/Pliocene could not advance to the localization of extension into narrow rift zones in the Pannonian region except some deep subbasins such as the Mako/Bekes and Danube basins. These basins are underlain coincidently by anomalously thin crust (22-25 km) and lithosphere (45-60 km). Significant departures (up to 130 mW m -2) from the average present-day surface heat flow for the initiation of two newly defined narrow rift zones (Tisza and Duna) in the Pannonian basin system. However, both of these narrow rifts failed since the final docking of the Eastern Carpathians onto the European foreland excluded any further extension of the back-arc region. LA - English DB - MTMT ER - TY - JOUR AU - Rosu, E AU - Pécskay, Zoltán AU - Stefan, A AU - Popescu, G AU - Panaiotu, C AU - Panaiotu, CE TI - The evolution of the Neogene volcanism in the Apuseni Mountains (Rumania): Constraints from new K-Ar data JF - GEOLOGICKY ZBORNIK J2 - GEOL ZBORN VL - 48 PY - 1997 IS - 6 SP - 353 EP - 359 PG - 7 SN - 0016-7738 UR - https://m2.mtmt.hu/api/publication/1507566 ID - 1507566 N1 - [ATKI P10892] Megjegyzés-10228707 [H24947->P09786] AB - New K-Ar data from the Apuseni Mountains Neogene volcanic area are presented. When combined with geological and magnetic polarity data, the new data clarify the duration and evolution of this volcanic area. They show that the Neogene volcanic activity took place during the Late Badenian-Pannonian (15-7 Ma). The beginning of calc-alkaline andesitic volcanism (around 15-13 Ma) had an explosive character giving a widespread volcano-sedimentary formation. The volcanic activity reached the paroxysm during the Sarmatian (13.5-11 Ma), when thick lava flows and large volcanic structures were emplaced. This activity decreased in the Pannonian (10-7 Ma) and was restricted to the central and northeastern parts of the studied area. In the central part, the volcanic activity slopped in the Early Pannonian (10 Ma), while in the northeastern part it lasted until the Late Pannonian (7 Ma). The volcanic products are covered by pure sedimentary formations in only a few parts of the area. During all this time, tectonic activity played an important role in the basin's development and volcanic processes. LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Ferenc AU - Cloetingh, S TI - Stress-induced late-stage subsidence anomalies in the Pannonian basin JF - TECTONOPHYSICS J2 - TECTONOPHYSICS VL - 266 PY - 1996 IS - 1-4 SP - 287 EP - 300 PG - 14 SN - 0040-1951 DO - 10.1016/S0040-1951(96)00194-1 UR - https://m2.mtmt.hu/api/publication/1255454 ID - 1255454 N1 - DE: basin evolution; basin modeling; tectonic inversion; intraplate stress AB - Subsidence, sedimentation and tectonic quiescence of the Pannonian basin was interrupted a few million years ago by tectonic reactivation. This recent activity has manifested itself in uplift of the western and eastern flanks, and continuing subsidence of the central part of the Pannonian basin. Low- to medium-magnitude earthquakes of the Carpathian-Pannonian region are generated mostly in the upper crust by reverse and wrench fault mechanisms. There is no evidence for earthquakes of extensional origin. 2-D model calculation of the subsidence history shows that a recent increase in magnitude of horizontal compressional intraplate stress can explain fairly well the observed Quaternary uplift and subsidence pattern. We propose that this stress increase is caused by the overall Europe/Africa convergence. In Late Pliocene, consumption of subductible lithosphere at the eastern margin of the Pannonian basin was completed, and the lithosphere underlying the Pannonian basin became locked in a stable continental frame. Consequently extensional basin formation has come to an end, and compressional inversion of the Pannonian basin is in progress. LA - English DB - MTMT ER -