Authors:Gábor Szilágyi, Katalin Náfrádi and Pál Sümegi
( Tóth and Tóth 2003 ; Tóth 2006 ; Barczi et al. 2009 ; Pető and Barczi 2011 ; Dani and Horváth 2012 ). This term persisted despite archeologists’ warnings of the problems and misunderstandings it has caused, both in chronology and functional
Authors:István Vető, János Csizmeg and Csanád Sajgó
Numerous accumulations of CO2 and nitrogen-rich natural gas are known in the hot Pannonian Basin System (PBS), where even the mixture of these two fluids is a common phenomenon. The Danube Basin, part of the PBS, is characterized by the predominance of CO2 and nitrogen-rich natural gas over “normal” natural gas. The multistacked Répcelak and Mihályi gas accumulations (southern, Hungarian part of the Danube Basin) display an upward increase of nitrogen-rich natural gas at the expense of CO2. This study, using the abundant public data, the published results and the new biomarker data obtained from oil traces, attempts to explain the formation of these multistacked accumulations. A synoptic view of the vertical changes in gas composition, the maturation history of the basin and its basement, the chronology of the Neogene basaltic volcanism and the biomarker pattern of the oil traces resulted in the recognition of the metasedimentary origin of the nitrogen-rich natural gas and in a relative chronology of the mixing of the two gases and the oil.
Quaternary thermogene and meteogene travertine occurs globally, both in Hungary and abroad. Size and thickness of the individual deposits are highly variable. They can be classified on the basis of water temperature, morphological setting, depositional environment, microfacies and fabric. All travertine is composed of pure low magnesian calcite and its stable isotopic composition (d13C, d18O) may change according to the facies. Sr and Ba are typical and some places enrichment of heavy metals, U, Th, and REE were also reported. Travertine is generally related to karst water springs; therefore, tectonically-controlled karstification, cave and soil formations are very common. It can be rich in fossils and its water depth varies from some centimeters to tens of meters. Chronology and timing of travertine can be solved by applying numerical, calibrated and correlative methods.
Authors:Tibor Zelenka, Endre Balázs, Kadosa Balogh, János Kiss and at. al.
and central Tiszántúl, E. Hungary, and their K/Ar radiometric chronology). - Földt. Közl., 177, pp. 223 - 235 .
: Észak- és Közép-Tiszántúl fedett miocén vulkanitjai és K/Ar radiometriai kronológiájuk (Buried Miocene
Authors:Mária Földvári, Zsolt Berner and Doris Stüben
Acta Geologica Hungarica 46, 2003
Korpás, L., P Kovács-Pálffy, M. Lantos, M. Foldvári, L. Kordos, E. Krolopp, D. Stüben, Zs. Berner (in press): Sedimentology, geochemistry, chronology and palaeokarst evolution of
Authors:Bernadett Bajnóczi, Attila Demény and László Korpás
Korpás, L., P. Kovács-Pálffy, M. Lantos, M. Földvári, L. Kordos, E. Krolopp, D. Stüben, Zs. Berner (in press): Sedimentology, geochemistry, chronology and palaeokarst evolution of a Quaternary thermal lacustrine travertine. An integrated case study from