TY - JOUR AU - Demény, Attila AU - Berentés, A AU - Rinyu, László AU - Kovács, Ivett AU - Surányi, Gergely AU - Virág, Magdolna TI - Subaqueous carbonate speleothems as paleotemperature archives – clumped isotope thermometry and stable isotope compositions of inclusion-hosted wate JF - INTERNATIONAL JOURNAL OF SPELEOLOGY J2 - INT J SPELEOL VL - 53 PY - 2024 IS - 1 SP - 25 EP - 37 PG - 13 SN - 0392-6672 DO - 10.5038/1827-806X.53.1.2480 UR - https://m2.mtmt.hu/api/publication/34659670 ID - 34659670 N1 - Funding Agency and Grant Number: Balaton Uplands National Park [102-2/2022]; Eotvos Lorand Research Network; European Union [GINOP-2.3.2-15-2016-00009 'ICER']; Hungarian State; European Regional Development Fund; [SA-41/2021] Funding text: The sampling conducted for this study in Berger Karoly Cave was permitted by the directorate of the Balaton Uplands National Park (No. 102-2/2022) . Rezso Szilaj and Denes Szieberth provided essential help during sampling in Berger Karoly and Molnar Janos caves, respectively. The authors are indebted to Ariana Gugora for polishing the English of the manuscript. Constructive reviews and helpful comments of three anonymous reviewers, and the editorial handling by Bogdan P. Onac are gratefully thanked. The study was financed by the Eotvos Lorand Research Network (projects SA-41/2021; ELKH KEP-1/2020) . The clumped isotope facility of the Institute for Nuclear Research was supported by the European Union and the Hungarian State, co -financed by the European Regional Development Fund in the project of GINOP-2.3.2-15-2016-00009 'ICER'. LA - English DB - MTMT ER - TY - JOUR AU - Baloghné Kiss, Gabriella AU - Molnár, Kata AU - Benkó, Zsolt AU - Skoda, P AU - Kapui, Zsuzsanna AU - Garuti, G AU - Zaccarini, F AU - Palcsu, László AU - Czuppon, György TI - Tracing the Source of Hydrothermal Fluid in Ophiolite-Related Volcanogenic Massive Sulfide Deposits: A Case Study from the Italian Northern Apennines JF - MINERALS J2 - MINERALS-BASEL VL - 13 PY - 2023 IS - 1 PG - 18 SN - 2075-163X DO - 10.3390/min13010008 UR - https://m2.mtmt.hu/api/publication/33527205 ID - 33527205 N1 - Department of Mineralogy, Institute of Geography and Earth Sciences, ELTE Eötvös Loránd University, Budapest, 1117, Hungary Isotope Climatology and Environmental Research Centre, Institute for Nuclear Research, Debrecen, 4026, Hungary Department of Mineralogy and Geology, University of Debrecen, Debrecen, 4032, Hungary Geosciences Programme, Faculty of Science, University Brunei Darussalam, Bandar Seri Begawan, BE1410, Brunei Darussalam Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network, Budaőrsi út 45, Budapest, 1112, Hungary Export Date: 9 February 2023 Correspondence Address: Kiss, G.B.; Department of Mineralogy, Hungary; email: gabriella.b.kiss@ttk.elte.hu AB - The Italian Northern Apennines contain several Fe-Cu-Zn-bearing, Cyprus-type volcanogenic massive sulfide (VMS) deposits, which significantly contribute to the Cu resources of Italy. The massive sulfide lenses and related stockwork mineralizations are hosted by several levels (from basalt to serpentinite) of the unmetamorphosed ophiolitic series; therefore, this region offers perfect locations to study the ore-forming hydrothermal system in detail. A combination of fluid inclusion microthermometry, Raman spectroscopy, electron probe analyses (chlorite thermometry) and stable and noble gas isotope geochemistry was used to determine the fluid source of the VMS system at Bargone, Boccassuolo, Campegli, Casali–Monte Loreto, Corchia, Reppia and Vigonzano. This question of the fluid source is the focus of modern VMS research worldwide, as it has a direct influence on the metal content of the deposit. The obtained temperature and compositional data are both in the typical range of VMS systems and basically suggest evolved seawater origin for the mineralizing fluid. Modification of seawater was most commonly due to fluid–rock interaction processes, which happened during long-lasting circulation in the crust. The role of a small amount of magmatic fluid input was traced only at the lower block of Boccassuolo, which may be responsible for its higher ore grade. This fluid origin model is evidenced by O, H and C stable isotopic as well as He, Ne and Ar noble gas isotopic values. LA - English DB - MTMT ER - TY - JOUR AU - Weissbach, T AU - Kluge, T AU - Affolter, S AU - Leuenberger, MC. AU - Vonhof, H AU - Riechelmann, DFC. AU - Fohlmeister, J AU - Juhl, MC AU - Hemmer, B AU - Wu, Y AU - Warken, SF. AU - Schmidt, M AU - Frank, N AU - Aeschbach, W TI - Constraints for precise and accurate fluid inclusion stable isotope analysis using water-vapour saturated CRDS techniques JF - CHEMICAL GEOLOGY J2 - CHEM GEOL VL - 617 PY - 2023 SN - 0009-2541 DO - 10.1016/j.chemgeo.2022.121268 UR - https://m2.mtmt.hu/api/publication/33334510 ID - 33334510 N1 - Heidelberg Graduate School of Fundamental Physics, Heidelberg University, Im Neuenheimer Feld 226, Heidelberg, 69120, Germany Institute of Environmental Physics, Heidelberg University, Im Neuenheimer Feld 229, Heidelberg, 69120, Germany Heidelberg Center for the Environment, Heidelberg University, Im Neuenheimer Feld 229, Heidelberg, 69120, Germany Institute of Applied Geosciences, Karlsruhe Institute of Technology, Adenauerring 20b, Karlsruhe, 76131, Germany Department of Environmental Sciences, University of Basel, Bernoullistrassse 30/32, Basel, 4056, Switzerland Climate and Environmental Physics Division, Physics Institute and Oeschger Centre for Climate Change Research, University of Bern, Sidlerstrasse 5, Bern, 3012, Switzerland Climate Geochemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, Mainz, 55128, Germany Institute for Geosciences, Johannes Gutenberg University Mainz, Johann-Joachim-Becher-Weg 21, Mainz, 55128, Germany Federal Office for Radiation Protection, Köpenicker Allee 120-130, Berlin, 10318, Germany GFZ German Research Centre for Geosciences, Section ‘Climate Dynamics and Landscape Development’, Telegrafenberg, Potsdam, 14473, Germany Institute of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 234, Heidelberg, 69120, Germany Export Date: 3 January 2023 Correspondence Address: Kluge, T.; Heidelberg Graduate School of Fundamental Physics, Im Neuenheimer Feld 226, Germany; email: tobias.kluge@kit.edu LA - English DB - MTMT ER - TY - JOUR AU - Wilske, C. AU - Suckow, A. AU - Gerber, C. AU - Deslandes, A. AU - Crane, P. AU - Mallants, D. TI - Mineral Crushing Methods for Noble Gas Analyses of Fluid Inclusions JF - GEOFLUIDS J2 - GEOFLUIDS VL - 2023 PY - 2023 SN - 1468-8115 DO - 10.1155/2023/8040253 UR - https://m2.mtmt.hu/api/publication/34065811 ID - 34065811 AB - Noble gases are frequently probed for investigating fluid inclusions in minerals to unravel rock-forming processes through time. Over the last decades, heating and crushing have been the two main methods applied for noble gas extraction from fluid inclusions in ultrahigh vacuum (about 10-9 mBar). The heating of minerals or pieces of bulk rock causes the release of noble gases from both fluid inclusions and the mineral or rock matrix, the latter due to temperature-dependent mineral dehydration. Crushing of minerals only affects fluid inclusions and allows a release of noble gases at room temperature with minor contributions from the mineral matrix. This review describes different ultravacuum crushing techniques for noble gas analysis from fluid inclusions. It examines the technical details and operational conditions of each crushing system as well as methods to prepare samples prior to crushing. Crushing systems were found to have unique designs across the different laboratories reviewed; they include single or multiple sample loadings and manual, magnetic, or hydraulic operation of the crushing pistons. Due to the small amounts of noble gases released, the technology requires several mg to a few grams of rock material to achieve a measurement of all stable noble gas isotopes in a single fluid inclusion. While theoretically all stable noble gas isotopes are of interest, the elements and isotopes reported in different studies vary widely and reference materials as well as laboratory intercomparisons are lacking. The review includes applications on the origins of magmatic rocks and geochemical processes in the Earth’s mantle, the origin and chemical composition of deep crustal fluids and how these contribute to the formation of minerals of economic interest, and paleoclimate studies based on speleothems. LA - English DB - MTMT ER - TY - JOUR AU - Barale, L. AU - Bertok, C. AU - D’atri, A. AU - Piana, F. AU - Bernasconi, S.M. AU - Czuppon, György AU - Palcsu, László AU - Gerdes, A. AU - Birgel, D. AU - Martire, L. TI - U-pb dating and geochemical constraints to early cretaceous hydrothermal dolomitization in the provenÇal domain (Maritime alps, nw italy-se france) JF - OFIOLITI J2 - OFIOLITI VL - 46 PY - 2021 IS - 2 SP - 131 EP - 149 PG - 19 SN - 0391-2612 DO - 10.4454/ofioliti.v46i2.543 UR - https://m2.mtmt.hu/api/publication/32089112 ID - 32089112 N1 - National Research Council of Italy, Institute of Geosciences and Earth Resources, Torino, Italy University of Torino, Department of Earth Sciences, Torino, Italy ETH Zurich, Department of Earth Sciences, Zurich, Switzerland Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network, Budapest, Hungary Isotope Climatology and Environmental Research Centre (ICER), Institute for Nuclear Research, Debrecen, Hungary Goethe University Frankfurt, Department of Geosciences, Frankfurt am Main, Germany University of Hamburg, Department of Earth Sciences, Institute for Geology, Hamburg, Germany Export Date: 2 July 2021 Correspondence Address: Bertok, C.; University of Torino, Italy; email: carlo.bertok@unito.it LA - English DB - MTMT ER - TY - JOUR AU - Cseresznyés, Dóra AU - Czuppon, György AU - Király, Csilla AU - Demény, Attila AU - Györe, D AU - Forray, V AU - Kovács, Ivett AU - Szabó, Csaba AU - Falus, György TI - Origin of dawsonite-forming fluids in the Mihályi-Répcelak field (Pannonian Basin) using stable H, C and O isotope compositions: Implication for mineral storage of carbon-dioxide JF - CHEMICAL GEOLOGY J2 - CHEM GEOL VL - 584 PY - 2021 SN - 0009-2541 DO - 10.1016/j.chemgeo.2021.120536 UR - https://m2.mtmt.hu/api/publication/32240638 ID - 32240638 N1 - Lithosphere Fluid Research Lab (LRG), Department of Petrology and Geochemistry, Institute of Geography and Earth Sciences, Eötvös Loránd University (ELTE), Pázmány Péter sétány 1/C, Budapest, 1117, Hungary Mining and Geological Survey of Hungary (MBFSZ), Colombus utca 17-23, Budapest, 1145, Hungary Institute for Geological and Geochemical Research (IGGR), Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network, Budaörsi út 45, Budapest, 1112, Hungary Isotope Climatology and Environmental Research Centre (ICER), Institute for Nuclear Research, Bem tér 18/c, Debrecen, 4026, Hungary Geographical Institute (GI), Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network, Budaörsi út 45, Budapest, 1112, Hungary Isotope Geosciences Unit, Scottish Universities Environmental Research Centre (SUERC), East Kilbride, Scotland G75 0QF, United Kingdom Export Date: 6 January 2022 Correspondence Address: Czuppon, G.; Institute for Geological and Geochemical Research (IGGR), Budaörsi út 45, Hungary; email: czuppon@geochem.hu AB - Natural CO2 reservoirs provide an opportunity to study long-term fluid-rock interactions, which are essential to reassure the safety of mineral storage of carbon-dioxide. The Mihályi-Répcelak field (Pannonian Basin, Central Europe) is one of the largest natural CO2-bearing reservoirs in Europe (25 Mt). The CO2 was trapped in Neogene sandstones, which contain various carbonate minerals (dolomite, ankerite, siderite, dawsonite). To reveal the origin of the parent fluid, from which these minerals precipitated, dawsonite and siderite were separated by a new physical method to minimise the uncertainties in the analysis of their stable isotope composition. The δ13CDaw values range from +1.3 to +1.6‰ and the calculated δ13CCO2 values in equilibrium with dawsonite (−4.8‰ - –2.0‰) overlap with the carbon isotope compositions of the local CO2 and the European Subcontinental Lithospheric Mantle (−3.9‰ - –2.1‰). This indicates that the dawsonite-forming CO2 had a magmatic origin. The siderite data indicates that some formed from the magmatic CO2, possibly simultaneously with dawsonite (−6.0‰ - –3.9‰), whereas the rest (−8.4 - –6.1‰) formed either from a fractionated CO2 with magmatic origin or before the CO2 invasion. The hydrogen isotope composition of structural OH− of dawsonite (−57‰ to −74‰) was determined and was used to estimate the origin of the interacting porewater. The calculated porewater data (δD: −69‰ - –103‰ and δ18O: −1.4‰ - +4.7‰) indicate that the parent fluid was meteoric water modified by water-rock interaction. Our data allows estimation of the total amount of CO2 stored in the dawsonite-bearing sandstone reservoir to be 25 kg/m3, well in line with previous modelling works, which gives a total of 2.01 × 106 t of CO2, higher than previous estimates. We suggest that individual mineral analysis complemented by hydrogen isotope analysis is to be employed to effectively trace in-reservoir fluid-rock interactions in CO2 reservoirs and provide valuable input data for geochemical modelling for better predicting conditions for mineral storage of CO2. LA - English DB - MTMT ER - TY - JOUR AU - Demény, Attila AU - Rinyu, László AU - Kern, Zoltán AU - Hatvani, István Gábor AU - Czuppon, György AU - Surányi, Gergely AU - Leél-Őssy, Szabolcs AU - Shen, CC AU - Koltai, Gabriella TI - Paleotemperature reconstructions using speleothem fluid inclusion analyses from Hungary JF - CHEMICAL GEOLOGY J2 - CHEM GEOL VL - 563 PY - 2021 PG - 11 SN - 0009-2541 DO - 10.1016/j.chemgeo.2020.120051 UR - https://m2.mtmt.hu/api/publication/31813634 ID - 31813634 N1 - Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Budaörsi út 45, Budapest, H-1112, Hungary Isotope Climatology and Environmental Research Centre (ICER), Institute for Nuclear Research, Bem tér 18/c, Debrecen, H-4026, Hungary MTA-ELTE Geological, Geophysical and Space Sciences Research Group, Pázmány Péter s. 1/c, Budapest, 1117, Hungary Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter sétány. 1/C, Budapest, H-1117, Hungary High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, 10617, Taiwan Research Center for Future Earth, National Taiwan University, Taipei, 10617, Taiwan Institut für Geologie, Leopold-Franzens-Universität Innsbruck, Austria Export Date: 25 January 2021 Correspondence Address: Demény, A.; Institute for Geological and Geochemical Research, Budaörsi út 45, Hungary; email: demeny@geochem.hu Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Budaörsi út 45, Budapest, H-1112, Hungary Isotope Climatology and Environmental Research Centre (ICER), Institute for Nuclear Research, Bem tér 18/c, Debrecen, H-4026, Hungary MTA-ELTE Geological, Geophysical and Space Sciences Research Group, Pázmány Péter s. 1/c, Budapest, 1117, Hungary Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter sétány. 1/C, Budapest, H-1117, Hungary High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, 10617, Taiwan Research Center for Future Earth, National Taiwan University, Taipei, 10617, Taiwan Institut für Geologie, Leopold-Franzens-Universität Innsbruck, Austria Export Date: 28 May 2021 Correspondence Address: Demény, A.; Institute for Geological and Geochemical Research, Budaörsi út 45, Hungary; email: demeny@geochem.hu LA - English DB - MTMT ER - TY - JOUR AU - de Graaf, S AU - Vonhof, HB. AU - Weissbach, T AU - Wassenburg, JA. AU - Levy, EJ. AU - Kluge, T AU - Haug, GH. TI - A comparison of isotope ratio mass spectrometry and cavity ring-down spectroscopy techniques for isotope analysis of fluid inclusion water JF - RAPID COMMUNICATIONS IN MASS SPECTROMETRY J2 - RAPID COMMUN MASS SPECTR VL - 34 PY - 2020 IS - 16 SN - 0951-4198 DO - 10.1002/rcm.8837 UR - https://m2.mtmt.hu/api/publication/31329820 ID - 31329820 N1 - Climate Geochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany Ruprecht-Karls University Heidelberg, Institute of Environmental Physics, Heidelberg, Germany Export Date: 3 January 2023 CODEN: RCMSE Correspondence Address: de Graaf, S.; Climate Geochemistry Department, Germany; email: stefan.graaf@mpic.de LA - English DB - MTMT ER - TY - JOUR AU - Ramsay, R.R. AU - Eves, A.E. AU - Denyszyn, S.W. AU - Wingate, M.T.D. AU - Fiorentini, M. AU - Gwalani, L.G. AU - Rogers, K.A. TI - Geology and geochronology of the Paleoproterozoic Hart Dolerite, Western Australia JF - PRECAMBRIAN RESEARCH J2 - PRECAMBRIAN RES VL - 335 PY - 2019 SN - 0301-9268 DO - 10.1016/j.precamres.2019.105482 UR - https://m2.mtmt.hu/api/publication/30882547 ID - 30882547 LA - English DB - MTMT ER - TY - JOUR AU - Garaguly, István AU - Raucsikné Varga, Andrea Beáta AU - Raucsik, Béla AU - Schubert, Félix AU - Czuppon, György AU - Frei, R TI - Pervasive early diagenetic dolomitization, subsequent hydrothermal alteration, and late stage hydrocarbon accumulation in a Middle Triassic carbonate sequence (Szeged Basin, SE Hungary) JF - MARINE AND PETROLEUM GEOLOGY J2 - MAR PETROL GEOL VL - 98 PY - 2018 SP - 270 EP - 290 PG - 21 SN - 0264-8172 DO - 10.1016/j.marpetgeo.2018.07.024 UR - https://m2.mtmt.hu/api/publication/3399845 ID - 3399845 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund of Hungary [K 108375] Funding text: This research was supported by the National Research, Development and Innovation Fund of Hungary (project no. K 108375). The authors would like to thank MOL Plc for providing the core material that were essential for this research. We would like to thank Dr. Fadi H. Nader and the anonymous referee for their suggestions and comments that improve our manuscript, as well as Associated Editor Dr. Ihsan Al-Aasm for the editorial work. Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Egyetem utca 2-6, Szeged, 6702, Hungary Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45, Budapest, H-1112, Hungary Department of Geosciences and Natural Resource Management, University of Copenhagen, ØsterVoldgade10, Copenhagen, 1350, Denmark Nordic Center for Earth Evolution (NordCEE), Copenhagen, Denmark Cited By :15 Export Date: 12 September 2021 Correspondence Address: Garaguly, I.; Department of Mineralogy, Egyetem utca 2-6, Hungary; email: garagulyistvan@gmail.com Funding text 1: This research was supported by the National Research, Development and Innovation Fund of Hungary (project no. K 108375 ). The authors would like to thank MOL Plc for providing the core material that were essential for this research. We would like to thank Dr. Fadi H. Nader and the anonymous referee for their suggestions and comments that improve our manuscript, as well as Associated Editor Dr. Ihsan Al-Aasm for the editorial work. LA - English DB - MTMT ER - TY - JOUR AU - Cseresznyés, Dóra AU - Czuppon, György AU - Szabó-Krausz, Zsuzsanna AU - Király, Csilla AU - Szabó, Csaba AU - Falus, György TI - Stable Isotope Compositions of Different Mineral Phases Found in a Natural CO2-reservoir (NW-Hungary): Implication for their Origin JF - ENERGY PROCEDIA J2 - ENERGY PROCEDIA VL - 114 PY - 2017 SP - 2812 EP - 2818 PG - 7 SN - 1876-6102 DO - 10.1016/j.egypro.2017.03.1399 UR - https://m2.mtmt.hu/api/publication/3262057 ID - 3262057 N1 - Lithosphere Fluid Research Lab, Eötvös University, Pazmany Peter setany 1/C, Budapest, H-1117, Hungary Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, HAS, Budaörsi 45, Budapest, H-1112, Hungary Geological and Geophysical Institute of Hungary, Stefánia 14, Budapest, 1143, Hungary Export Date: 14 December 2020 Correspondence Address: Falus, G.; Geological and Geophysical Institute of Hungary, Stefánia 14, Hungary; email: falus.gyorgy@mfgi.hu AB - Stable isotope systems provide exceptional insight into fluid-solid interactions occurring in the sub-surface. We provide detailed insight into the stable isotope distribution of carbonate minerals in a natural CO2 reservoir system from Mihályi-Répcelak area, NW-Hungary. Several types of measurements and calculations have been applied for the estimation of CO2 and H2O isotopic composition in equilibrium with dawsonite. The estimated G13C of CO2 exhibit values around -4.5 to -2.6 ‰ overlapping with assumed magmatic values and the presently measured gas data confirming magmatic origin, whereas we may assume that the water present during carbonate formation likely had meteoric origin. © 2017 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the organizing committee of GHGT-13. Keywords: stable isotopes; natural CO2 reservoir; carbonate minerals LA - English DB - MTMT ER - TY - JOUR AU - Demény, Attila AU - Kern, Zoltán AU - Czuppon, György AU - Németh, Alexandra AU - Leél-Őssy, Szabolcs AU - Siklósy, Z AU - Lin, K AU - Hsun-Ming, H AU - Shen, Ch-Ch AU - Vennemann, T W AU - Haszpra, László TI - Stable isotope compositions of speleothems from the last interglacial e Spatial patterns of climate fluctuations in Europe JF - QUATERNARY SCIENCE REVIEWS J2 - QUATERN SCI REV VL - 161 PY - 2017 SP - 68 EP - 80 PG - 13 SN - 0277-3791 DO - 10.1016/j.quascirev.2017.02.012 UR - https://m2.mtmt.hu/api/publication/3191622 ID - 3191622 N1 - Megjegyzés-26494825 N1 Funding details: LP2012-27/2012, MTA, Magyar Tudományos Akadémia N1 Funding details: OTKA CK 80661, OTKA, Országos Tudományos Kutatási Alapprogramok N1 Funding details: OTKA NK 101664, OTKA, Országos Tudományos Kutatási Alapprogramok N1 Funding text: We would like to express our gratitude to three anonymous reviewers whose suggestions helped clarify our ideas. This research was supported by the National Office for Research and Technology of Hungary (GVOP-3.2.1-2004-04-0235/3.0), the Hungarian Scientific Research Fund (OTKA CK 80661 and OTKA NK 101664) and the “Momentum-Lendület” program of the Hungarian Academy of Sciences (LP2012-27/2012). The Bolyai János research scholarship received by György Czuppon greatly helped his work. U-Th dating was supported by Taiwan ROC MOST and NTU grants (103-2119-M-002-022, 104-2119-M-002-003 and 101R7625). This is contribution No. 41 of the 2ka Palaeoclimatology Research Group. Megjegyzés-26505658 N1 Funding details: LP2012-27/2012, MTA, Magyar Tudományos Akadémia N1 Funding details: OTKA CK 80661, OTKA, Országos Tudományos Kutatási Alapprogramok N1 Funding details: OTKA NK 101664, OTKA, Országos Tudományos Kutatási Alapprogramok N1 Funding text: We would like to express our gratitude to three anonymous reviewers whose suggestions helped clarify our ideas. This research was supported by the National Office for Research and Technology of Hungary (GVOP-3.2.1-2004-04-0235/3.0), the Hungarian Scientific Research Fund (OTKA CK 80661 and OTKA NK 101664) and the “Momentum-Lendület” program of the Hungarian Academy of Sciences (LP2012-27/2012). The Bolyai János research scholarship received by György Czuppon greatly helped his work. U-Th dating was supported by Taiwan ROC MOST and NTU grants (103-2119-M-002-022, 104-2119-M-002-003 and 101R7625). This is contribution No. 41 of the 2ka Palaeoclimatology Research Group. Megjegyzés-26494805 N1 Funding details: LP2012-27/2012, MTA, Magyar Tudományos Akadémia N1 Funding details: OTKA CK 80661, OTKA, Országos Tudományos Kutatási Alapprogramok N1 Funding details: OTKA NK 101664, OTKA, Országos Tudományos Kutatási Alapprogramok N1 Funding text: We would like to express our gratitude to three anonymous reviewers whose suggestions helped clarify our ideas. This research was supported by the National Office for Research and Technology of Hungary (GVOP-3.2.1-2004-04-0235/3.0), the Hungarian Scientific Research Fund (OTKA CK 80661 and OTKA NK 101664) and the “Momentum-Lendület” program of the Hungarian Academy of Sciences (LP2012-27/2012). The Bolyai János research scholarship received by György Czuppon greatly helped his work. U-Th dating was supported by Taiwan ROC MOST and NTU grants (103-2119-M-002-022, 104-2119-M-002-003 and 101R7625). This is contribution No. 41 of the 2ka Palaeoclimatology Research Group. LA - English DB - MTMT ER - TY - JOUR AU - Demény, Attila AU - Czuppon, György AU - Kern, Zoltán AU - Leél-Őssy, Szabolcs AU - Németh, Alexandra AU - Szabó, Máté Zoltán AU - Tóth, Mária AU - Wu, C-C AU - Shen, C-C AU - Molnár, Mihály AU - Németh, Tibor AU - Németh, Péter AU - Óvári, Mihály TI - Recrystallization-induced oxygen isotope changes in inclusion-hosted water of speleothems - Paleoclimatological implications JF - QUATERNARY INTERNATIONAL J2 - QUATERN INT VL - 415 PY - 2016 SP - 25 EP - 32 PG - 8 SN - 1040-6182 DO - 10.1016/j.quaint.2015.11.137 UR - https://m2.mtmt.hu/api/publication/3042991 ID - 3042991 AB - The issue of diagenetic alteration of carbonate deposits in caves (speleothems) has gained increasing importance in recent years, as this process has serious consequences for speleothem-based paleoclimate studies. In this study stable hydrogen and oxygen isotope data of water trapped in fluid inclusions were collected for recently forming stalagmites and flowstones in order to determine how dripwater compositions are reflected and preserved in the inclusion water compositions. Hydrogen isotope compositions were found to reflect dripwater values, whereas the oxygen isotope data were increasingly shifted from the local dripwater compositions with the time elapsed after deposition. The δ18O data are correlated with X-Ray diffraction full width at half maximum values (related to crystal domain size and lattice strain), suggesting that the oxygen isotope shift is related to recrystallization of calcite. Transmission electron microscope analyses detected the presence of nanocrystalline (<50 nm) calcite, whose crystallization to coarser-grained calcite crystals (>200 nm) may have induced re-equilibration between the carbonate and the trapped inclusion water. The Ostwald ripening process provides an explanation for unexpectedly low oxygen isotope compositions in the inclusion water. The detected diagenetic alteration and its isotopic effects should be taken into consideration during sampling strategies and data evaluation as speleothems containing nanocrystalline calcite during their deposition are prone to late-stage oxygen isotope water-carbonate re-equilibration, which may shift the oxygen isotope composition of the inclusion water to more depleted values while the hydrogen isotope composition remains intact. © 2016. LA - English DB - MTMT ER - TY - JOUR AU - Downes, PJ AU - Dunkley, DJ AU - Fletcher, IR AU - McNaughton, NJ AU - Rasmussen, B AU - Jaques, AL AU - Verrall, M AU - Sweetapple, MT TI - Zirconolite, zircon and monazite-(Ce) U-Th-Pb age constraints on the emplacement, deformation and alteration history of the Cummins Range Carbonatite Complex, Halls Creek Orogen, Kimberley region, Western Australia JF - MINERALOGY AND PETROLOGY J2 - MINER PETROL VL - 110 PY - 2016 IS - 2-3 SP - 199 EP - 222 PG - 24 SN - 0930-0708 DO - 10.1007/s00710-015-0418-y UR - https://m2.mtmt.hu/api/publication/25772139 ID - 25772139 LA - English DB - MTMT ER - TY - JOUR AU - Uemura, R AU - Nakamoto, M AU - Asami, R AU - Mishima, S AU - Gibo, M AU - Masaka, K AU - Jin-Ping, C AU - Wu, CC AU - Chang, YW AU - Shen, CC TI - Precise oxygen and hydrogen isotope determination in nanoliter quantities of speleothem inclusion water by cavity ring-down spectroscopic techniques JF - GEOCHIMICA ET COSMOCHIMICA ACTA J2 - GEOCHIM COSMOCHIM AC VL - 172 PY - 2016 SP - 159 EP - 176 PG - 18 SN - 0016-7037 DO - 10.1016/j.gca.2015.09.017 UR - https://m2.mtmt.hu/api/publication/25368451 ID - 25368451 N1 - Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan Department of Earth Science, Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, 903-0213, Japan High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, 10617, Taiwan Cited By :9 Export Date: 6 September 2019 Correspondence Address: Uemura, R.; Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 1 Senbaru, Japan LA - English DB - MTMT ER - TY - JOUR AU - Demény, Attila TI - Lézerspektroszkópia: új technika a hidrológiai és paleoklíma-kutatás területén JF - MAGYAR TUDOMÁNY J2 - MAGYAR TUDOMÁNY VL - 176 PY - 2015 IS - 4 SP - 462 EP - 469 PG - 8 SN - 0025-0325 UR - https://m2.mtmt.hu/api/publication/2876571 ID - 2876571 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Demény, Attila AU - Czuppon, György AU - Siklósy, Zoltán AU - Leel-Ossy, S AU - Lin, K AU - Shen, CC AU - Vennemann, TW ED - Krajcar, Bronic I ED - Horvatincic, N ED - Obelic, B TI - Temperature and humidity changes at the beginning of the last interglacial reflected by combined H and O isotope compositions of inclusion-hosted water T2 - ESIR Isotope Workshop XIII PB - Ruder Boskovic Institute CY - Zágráb SN - 9789537941086 PY - 2015 SP - 33 PG - 1 UR - https://m2.mtmt.hu/api/publication/2956911 ID - 2956911 LA - English DB - MTMT ER - TY - JOUR AU - Dobosi, Gábor AU - Harangi, Szabolcs TI - Hungarian National Report on IAVCEI (2011-2014) JF - GEOMATIKAI KÖZLEMÉNYEK / PUBLICATIONS IN GEOMATICS J2 - GEOMAT KÖZL VL - 18 PY - 2015 IS - 1 SP - 137 EP - 145 PG - 9 SN - 1419-6492 UR - https://m2.mtmt.hu/api/publication/2920469 ID - 2920469 LA - English DB - MTMT ER - TY - JOUR AU - Downes, PJ AU - Demény, Attila AU - Czuppon, György AU - Lynton, Jaques A AU - Verrall, M AU - Sweetapple, M AU - Adams, D AU - McNaughton, NJ AU - Gwalani, LG AU - Griffin, BJ TI - Stable H–C–O isotope and trace element geochemistry of the Cummins Range Carbonatite Complex, Kimberley region, Western Australia: implications for hydrothermal REE mineralization, carbonatite evolution and mantle source regions JF - MINERALIUM DEPOSITA J2 - MINER DEPOSITA VL - 49 PY - 2014 IS - 8 SP - 905 EP - 932 PG - 28 SN - 0026-4598 DO - 10.1007/s00126-014-0552-1 UR - https://m2.mtmt.hu/api/publication/2780250 ID - 2780250 LA - English DB - MTMT ER -