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MULTI-PHASED NORMAL FAULTING OF THE EISENSTADT-SOPRON BASIN MARGINS AS A CONTROLLING FACTOR OVER SPATIALLY CONFINED COAL MINI-HYDROCARBON PLAY (EAST AUSTRIA)Darko SPAHIĆ1,* & Ljupko RUNDIĆ2 1Schlumberger * Corresponding Author. Address: Leningradskoe shosse 16A, build.3, 125171, Moscow, Russian Federation.E-mail: DSpahic@slb.com, / darkogeo2002@hotmail.com; Tel.: + 7 495 825 8200 ext 602737. 2University of Belgrade, Faculty of Mining and Geology, Department of Regional Geology, Kamenička 6, 11000, Belgrade, Serbia E-mail:ljupko.rundic@rgf.bg.ac.rs
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AbstractThe deformation chronology of the margins of the south-eastern and north-western Eisenstadt–Sopron sub-basin, initially (i) the multiphase normal faulting convergence with the sediment stacking, tectonic inversion and eroded rock volumes were characterised and subsequently (ii) the effects of these processes on the local, spatially confined coal bearing mini-petroleum system were additionally reproduced and quantified. The deformations in the south-eastern margin of the Basin indicated a late Sarmatian - Pannonian development of fault-adjacent reverse drag as potentially the main trap formation time. A combination of ‘palaeo’ and ‘present day heat flow scenarios was used for the calculation of hydrocarbon generation within the north-western depocentre accommodated by the initial early Tertiary syn-rift stretching and syn-sedimentary deposition associated with the Forchenstein fault. According to a palinspastic analysis, deformation chronology and thermal basin models, hydrocarbon generation commenced during the Middle Miocene at about 14 Ma and terminated during the Late Miocene (≈ 10 Ma) due to a rapid cooling caused by uplift and erosion. Over 50% of the total resource potential was realized at the deepest mini-basin section. The results of 1D basin modelling of the north-western mini-basin depocentre suggested that there is a high probability of once active source rocks around a depocentre, however with limited generation volumes. Keywords:
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MULTI-PHASED NORMAL FAULTING OF THE EISENSTADT-SOPRON BASIN MARGINS AS A CONTROLLING FACTOR OVER SPATIALLY CONFINED COAL MINI-HYDROCARBON PLAY (EAST AUSTRIA)
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