Hazai holocén cseppkövek paleoklimatológiai elemzése uránsorozatos korhatározás és stabil izotóp vizsgálatok alapján = Paleoclimatology of Hungarian Holocene dripstones based on U-series dating and stable isotope analyses

Célunk volt a hazai klimatológiai célú alapkutatások sorába bevonni a karbonátos barlangi képződményeket. A hazai cseppköveken alkalmazott stabilizotóp-geokémiai (>1000 adat) és a kapott nagyszámú (>250 db) uránsoros kor- és nyomelem-geokémiai adat (>10.000 adat) segítségével a pleisztocén és holocén klíma kutatásának nagy felbontású vizsgálata kezdődött meg. Jelentős módszerfejlesztés volt a víztartalmú zárványok stabilhidrogén-izotóp elemzése. Kis tömegű (1000 data) applied on local dripstones and number (>250 pc) of uranium series age and trace element geochemical data (>10,000 data), the high-resolution investigation of the Pleistocene and Holocene climate has started. A significant method development was the stable hydrogen isotope analysis of water containing inclusions. We recognized climate change events with high resolution from samples of small mass formerly unavailable (<0,2 gr). We identified the changes of the past thousand years on a stalactite originating from a cave of the Bükk Mts. On a sample from the Mecsek we indicated the environmental changes occurred about 3500 years ago and presence of volcanic dust and its inwash into the cave, and also described the environmental effect of the uranium mining. A number of dripstones and carbonate precipitations were investigated in caves, the results of which – being more ten thousand years old – we couldn’t directly use in our research topic but they provided valuable data for other researches and publications. (E.g. geochemical investigation of the formations of the Baradla Cave demonstrates the climate reconstruction of the last glacial age and of the Holocene periods; from the age of the calcite laminates of the caves of Rózsadomb we could draw inferences for the rate of emergence of the mountains, etc.