Sedimentology and hydrocarbon habitat of the submarine-fan deposits of theCentral Carpathian Paleogene Basin (NE Slovakia)

The Central Carparhian Paleogene Basin accommodates a subsiding area of the destructive plate-margin. The basin history comprises marginal faulting an d alluvial fan accumulation (E-2); transgressive onlap by shoreface sedimen ts and carbonate platform deposits (E-2); glacio-eustatic regression induce d by cooling (Terminal Eocene Event); forced regression, tectonic subsidenc e and growth-fault accumulation of basin-floor and slope fans (E-3): decele rating subsidence. aggredation and sea-level rising during the mud-rich dep osition (O-1); high-magnitude drop in sea-level (Mid-Oligocene Event), retr oarc backstep of depocenters and lowstand accumulation of sand-rich fans an d suprafans (O-2-M-1): subduction-related shortening and basin inversion al ong the northern margins affected by backthrusting and transpressional defo rmation (O-2-M-1). The basin-till sequence has poor (TOC less than or equal to 0.5%) to fair (TOC < 1.0%) quality of source rocks. Maturity of OM rang es from initial to relic stage of HC generation. Paleogene rock-extracts di splay a good correlation with scarce trapped oils. The presence of solid bi tumens and HC-rich fluid inclusions indicates overpressure conditions durin g HC generation and migration. Potential HC reservoirs can be expected in p orous lithologies (scarp breccias), in basement highs and traps related to backthrusting, fault-propagation folding and strike-slip tectonics. (C) 200 1 Elsevier Science Ltd. All rights reserved.