TY - JOUR AU - M. Tóth, Tivadar AU - Szűcs, É AU - Schubert, Félix AU - Hollós, Cs TI - Conceptual fracture network model of the crystalline basement of the Szeghalom Dome (Pannonian Basin, SE Hungary) JF - ACTA GEOLOGICA HUNGARICA: A QUARTERLY OF THE HUNGARIAN ACADEMY OF SCIENCES J2 - ACTA GEOL HUNG VL - 47 PY - 2004 IS - 1 SP - 19 EP - 34 PG - 16 SN - 0236-5278 DO - 10.1556/AGeol.47.2004.1.2 UR - https://m2.mtmt.hu/api/publication/1129815 ID - 1129815 LA - English DB - MTMT ER - TY - JOUR AU - Juhász, A AU - M. Tóth, Tivadar AU - Ramseyer, K AU - Matter, A TI - Connected fluid evolution in fractured crystalline basement and overlying sediments, Pannonian Basin, SE Hungary JF - CHEMICAL GEOLOGY J2 - CHEM GEOL VL - 182 PY - 2002 IS - 2-4 SP - 91 EP - 120 PG - 30 SN - 0009-2541 DO - 10.1016/S0009-2541(01)00269-8 UR - https://m2.mtmt.hu/api/publication/1129807 ID - 1129807 LA - English DB - MTMT ER - TY - JOUR AU - Schubert, Félix AU - M. Tóth, Tivadar TI - Structural evolution of mylonitized gneiss zone from the northern flank of the Szeghalom Dome (Pannonian Basin, SE Hungary) JF - ACTA MINERALOGICA PETROGRAPHICA J2 - ACTA MINERAL PETROGR VL - 42 PY - 2001 SP - 59 EP - 64 PG - 6 SN - 0365-8066 UR - https://m2.mtmt.hu/api/publication/1129804 ID - 1129804 LA - English DB - MTMT ER - TY - JOUR AU - Tóth, József AU - Almasi, I TI - Interpretation of observed fluid potential patterns in a deep sedimentary basin under tectonic compression: Hungarian Great Plain, Pannonian Basin JF - GEOFLUIDS J2 - GEOFLUIDS VL - 1 PY - 2001 IS - 1 SP - 11 EP - 36 PG - 26 SN - 1468-8115 DO - 10.1046/j.1468-8123.2001.11004.x UR - https://m2.mtmt.hu/api/publication/2947136 ID - 2947136 AB - The approximate to 40 000 km(2) Hungarian Great Plain portion of the Pannonian Basin consists of a basin fill of 100 m to more than 7000 m thick semi- to unconsolidated marine, deltaic, lacustrine and fluviatile clastic sediments of Neogene age, resting on a strongly tectonized Pre-Neogene basement of horst-and-graben topography of a relief in excess of 5000 m. The basement is built of a great variety of brittle rocks, including flysch, carbonates and metamorphics. The relatively continuous Endrod Aquitard, with a permeability of less than 1 md (10(-15) m(2)) and a depth varying between 500 and 5000 m, divides the basin's rock framework into upper and lower sequences of highly permeable rock units, whose permeabilities range from a few tens to several thousands of millidarcy. Subsurface fluid potential and flow fields were inferred from 16 192 water level and pore pressure measurements using three methods of representation: pressure-elevation profiles; hydraulic head maps; and hydraulic cross-sections. Pressure-elevation profiles were constructed for eight areas. Typically, they start from the surface with a straight-line segment of a hydrostatic gradient (gamma(st) = 9.8067 MPa km(-1)) and extend to depths of 1400-2500 m. At high surface elevations, the gradient is slightly smaller than hydrostatic, while at low elevations it is slightly greater. At greater depths, both the pressures and theft vertical gradients are uniformly superhydrostatic. The transition to the overpressured depths may be gradual, with a gradient of gamma(dyn) = 10(-15) MPa km(-1) over a vertical distance of 400-1000 m, or abrupt, with a pressure jump of up to 10 MPa km(-1) over less than 100 m and a gradient of gamma(dyn) > 20 MPa km(-1). According to the hydraulic head maps for 13 100-500 m thick horizontal slices of the rock framework, the fluid potential in the near-surface domains declines with depth beneath positive topographic features, but it increases beneath depressions. The approximate boundary between these hydraulically contrasting regions is the 100 m elevation contour line in the Duna-Tisza interfluve, and the 100-110 m contours in the Nyirseg uplands. Below depths of 600 m, islets of superhydrostatic heads develop which grow in number, areal extent and height as the depth increases; hydraulic heads may exceed 3000 m locally. A hydraulic head 'escarpment' appears gradually in the elevafion range of - 1000 to - 2800 m along an arcuate line which tracks a major regional fault zone striking NE-SW: heads drop stepwise by several hundred metres, at places 2000 m, from its north and west sides to the south and east. The escarpment forms a 'fluid potential bank' between a 'fluid potential highland' (500-2500 m) to the north and west, and a 'fluid potential basin' (100-500 m) to the south and east. A 'potential island' rises 1000 m high above this basin further south. According to four vertical hydraulic sections, groundwater flow is controlled by the topography in the upper 200-1700 m of the basin; the driving force is orientated downwards beneath the highlands and upwards beneath the lowlands. However, it is directed uniformly upwards at greater depths. The transition between the two regimes may be gradual or abrupt, as indicated by wide or dense spacing of the hydraulic head contours, respectively. Pressure 'plumes' or 'ridges' may protrude to shallow depths along faults originating in the basement. The basement horsts appear to be overpressured relative to the intervening grabens. The principal thesis of this paper is that the two main driving forces of fluid flow in the basin are gravitation, due to elevation differences of the topographic relief, and tectonic compression. The flow field is unconfined in the gravitational regime, whereas it is confined in the compressional regime. The nature and geometry of the fluid potential field between the two regimes are controlled by the sedimentary and structural features of the rock units in that domain, characterized by highly permeable and localized sedimentary windows, conductive faults and fracture zones. The transition between the two potential fields can be gradual or abrupt in the vertical, and island-like or ridge-like in plan view. The depth of the boundary zone can vary between 400 and 2000 m. Recharge to the gravitational regime is inferred to occur from infiltrating precipitation water, whereas that to the confined regime is from pore volume reduction due to the basement's tectonic compression. LA - English DB - MTMT ER - TY - JOUR AU - M. Tóth, Tivadar AU - Schubert, Félix AU - Zachar, J TI - Neogene exhumation of the Variscan Szeghalom dome, Pannonian Basin, E. Hungary JF - GEOLOGICAL JOURNAL J2 - GEOL J VL - 35 PY - 2000 IS - 3-4 SP - 265 EP - 284 PG - 20 SN - 0072-1050 DO - 10.1002/gj.861 UR - https://m2.mtmt.hu/api/publication/1129800 ID - 1129800 LA - English DB - MTMT ER - TY - JOUR AU - Sajgó, Csanád TI - Assessment of generation temperatures of crude oils. 19th International Meeting on Organic Geochemistry, MARMARA RES CTR, ISTANBUL, TURKEY, SEP 06-10, 1999 TS - 19th International Meeting on Organic Geochemistry, MARMARA RES CTR, ISTANBUL, TURKEY, SEP 06-10, 1999 JF - ORGANIC GEOCHEMISTRY J2 - ORG GEOCHEM VL - 31 PY - 2000 IS - 12 SP - 1301 EP - 1323 PG - 23 SN - 0146-6380 DO - 10.1016/S0146-6380(00)00097-8 UR - https://m2.mtmt.hu/api/publication/1109934 ID - 1109934 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 - M. Tóth, Tivadar TI - Retrograded eclogite from the Kőrös Complex (Eastern Hungary): Records of a two-phase metamorphic evolution in the Tisia composite terrane JF - ACTA MINERALOGICA PETROGRAPHICA J2 - ACTA MINERAL PETROGR VL - 38 PY - 1997 SP - 51 EP - 63 PG - 13 SN - 0365-8066 UR - https://m2.mtmt.hu/api/publication/1129795 ID - 1129795 LA - English DB - MTMT ER - TY - JOUR AU - Matyas, J AU - Burns, SJ AU - Muller, P AU - Magyar, Imre TI - What can stable isotopes say about salinity? An example from the late Miocene Pannonian Lake JF - PALAIOS J2 - PALAIOS VL - 11 PY - 1996 IS - 1 SP - 31 EP - 39 PG - 9 SN - 0883-1351 DO - 10.2307/3515114 UR - https://m2.mtmt.hu/api/publication/1890264 ID - 1890264 AB - The mid-to late Miocene ''Pannonian Lake'' was a primarily closed, saline lake which during its lifetime underwent a series of rapid salinity changes associated with faunal extinctions/radiations. The first two of these, at the Badenian/Sarmatian and Sarmatian/Pannonian boundaries signify the transition from a marine basin to a brackish lake and are marked by major faunal changes. The isotopic composition of molluscs from the lake, however, does not undergo major changes. The third transition, at the end of the Pannonian. and into the Pontian, is also marked by major faunal changes, thought initially to reflect further freshening of the lake. Both carbon, and oxygen isotope ratios of lake molluscs decrease by 4 to 6 parts per thousand at this transition. A consideration of salinity and oxygen. isotope mass balances for a closed or nearly-closed lake shows that major changes in salinity accompany relatively minor changes in water balance and isotopic composition. This result explains why the oxygen. isotope ratio of lake waters did not change during the initial freshening of the lake and suggests that the major isotopic changes observed later are not directly related to changes in the lake water balance which caused the salinity changes. The isotopic variations were driven mainly by other climatic factors, most likely changes in humidity and isotopic composition of inflow. LA - English DB - MTMT ER - TY - JOUR AU - Posgay, Károly AU - Takács, Ernő AU - Szalay, István AU - Bodoky, Tamás János AU - Hegedűs, Endre AU - Jánváriné, Kántor Ilona AU - Tímár, Zoltán AU - Varga, Géza AU - Bérczi, István AU - Szalay, Árpád AU - Nagy, Zoltán AU - Pápa, Antal AU - Hajnal, Zoltán AU - Reilkoff, Brian AU - Mueller, Stephan AU - Ansorge, Joerg AU - De Iaco, Remo AU - Asudeh, Isa TI - International deep reflection survey along the Hungarian Geotraverse JF - GEOFIZIKAI KÖZLEMÉNYEK - GEOPHYSICAL TRANSACTIONS J2 - GEOFIZIKAI KÖZLEMÉNYEK VL - 40 PY - 1996 IS - 1-2 SP - 1 EP - 44 PG - 44 SN - 0016-7177 UR - https://m2.mtmt.hu/api/publication/2248748 ID - 2248748 LA - English DB - MTMT ER - TY - JOUR AU - M. Tóth, Tivadar TI - Retrograded eclogite in the crystalline basement of Tisza Unit, Hungary JF - ACTA MINERALOGICA PETROGRAPHICA J2 - ACTA MINERAL PETROGR VL - 36 PY - 1995 SP - 117 EP - 128 PG - 12 SN - 0365-8066 UR - https://m2.mtmt.hu/api/publication/1129791 ID - 1129791 LA - English DB - MTMT ER - TY - JOUR AU - Tari, Gábor AU - Horváth, Ferenc AU - RUMPLER, J TI - Styles of extension in the Pannonian Basin. JF - TECTONOPHYSICS J2 - TECTONOPHYSICS VL - 208 PY - 1992 IS - 1-3 SP - 203 EP - 219 PG - 17 SN - 0040-1951 DO - 10.1016/0040-1951(92)90345-7 UR - https://m2.mtmt.hu/api/publication/1255444 ID - 1255444 AB - Structural interpretation of reflection seismic profiles reveals distinct modes of upper crustal extension in the Pannonian Basin. While some subbasins in the Pannonian Basin complex show little extension (planar rotational normal faults), others are characterized by large magnitude of extension (detachment faults, metamorphic core complexes). Gravitational collapse of the Intra-Carpathian domain, combined with subduction zone roll-back is thought to be the driving mechanism of the Neogene back-arc extension. The very heterogeneously distributed extension is accommodated by transfer faults, which bound regions characterized by different polarity, direction, or amount of extension. In cross section these transfer faults are characterized by flower structures, typical for strike-slip faults. Seismic stratigraphic interpretations indicate that the non-marine post-rift sedimentary fill of the Pannonian Basin can be described in terms of sequence stratigraphy. The exceptionally good seismic sequence resolution allows recognition of third-order and also fourth-order depositional sequences, which may reflect the interplay of tectonics and eustasy, and Milankovitch scale climatic variations, respectively. LA - English DB - MTMT ER -