@article{MTMT:2105783,
	title = {A mass spectrometric line for tritium analysis of water and noble gas measurements from different water amounts in the range of microlitres and millilitres},
	url = {https://m2.mtmt.hu/api/publication/2105783},
	author = {Papp, László and Palcsu, László and Major, Zoltán and Rinyu, László and Toth, I},
	doi = {10.1080/10256016.2012.679935},
	journal-iso = {ISOT ENVIRON HEALT S},
	journal = {ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES},
	volume = {48},
	unique-id = {2105783},
	issn = {1025-6016},
	abstract = {This paper describes the procedure followed for noble gas measurements for litres, millilitres and microlitres of water samples in our laboratory, including sample preparation, mass spectrometric measurement procedure, and the complete calibrations. The preparation line extracts dissolved gases from water samples of volumes of 0.2 mu l to 31 and it separates them as noble and other chemically active gases. Our compact system handles the following measurements: (i) determination of tritium concentration of environmental water samples by the He-3 ingrowth method; (ii) noble gas measurements from surface water and groundwater; and (iii) noble gas measurements from fluid inclusions of solid geological archives (e. g. speleothems). As a result, the tritium measurements have a detection limit of 0.012 TU, and the expectation value (between 1 and 20 TU) is within 0.2% of the real concentrations with a standard deviation of 2.4 %. The reproducibility of noble gas measurements for water samples of 20-40 ml allows us to determine solubility temperatures by an uncertainty better than 0.5 degrees C. Moreover, noble gas measurements for tiny water amounts (in the microlitre range) show that the results of the performed calibration measurements for most noble gas isotopes occur with a deviation of less than 2 %. Theoretically, these precisions for noble gas concentrations obtained from measurements of waters samples of a few microlitres allow us to determine noble gas temperatures by an uncertainty of less than 1 degrees C. Here, we present the first noble gas measurements of tiny amounts of artificial water samples prepared under laboratory conditions.},
	keywords = {SYSTEM; SAMPLES; WATER; Hungary; Tritium; NATURAL-WATERS; Helium; isotope; paleoclimate; record; He-3 ingrowth method; Noble gas mass spectrometry; SHALLOW GROUNDWATER; Age dating; palaeoclimate reconstruction; methods and equipment; isotope measurements; helium-4; helium-3},
	year = {2012},
	eissn = {1477-2639},
	pages = {494-511}
}

@article{MTMT:1495864,
	title = {Groundwater flow system as an archive of palaeotemperature: Noble gas, radiocarbon, stable isotope and geochemical study in the Pannonian Basin, Hungary},
	url = {https://m2.mtmt.hu/api/publication/1495864},
	author = {Varsanyi, I and Palcsu, László and Kovacs, LO},
	doi = {10.1016/j.apgeochem.2010.11.006},
	journal-iso = {APPL GEOCHEM},
	journal = {APPLIED GEOCHEMISTRY},
	volume = {26},
	unique-id = {1495864},
	issn = {0883-2927},
	keywords = {Earth, Cosmic and Environm. Res.,},
	year = {2011},
	eissn = {1872-9134},
	pages = {91-104}
}

@article{MTMT:1705320,
	title = {Noble gases in anhydrous mantle xenoliths from Tasmania in comparison with other localities from eastern Australia: Implications for the tectonic evolution},
	url = {https://m2.mtmt.hu/api/publication/1705320},
	author = {Czuppon, György and Matsumoto, T and Matsuda, J and Everard, J and Sutherland, L},
	doi = {10.1016/j.epsl.2010.09.012},
	journal-iso = {EARTH PLANET SC LETT},
	journal = {EARTH AND PLANETARY SCIENCE LETTERS},
	volume = {299},
	unique-id = {1705320},
	issn = {0012-821X},
	year = {2010},
	eissn = {1385-013X},
	pages = {317-327},
	orcid-numbers = {Czuppon, György/0000-0002-7231-6042}
}

@article{MTMT:1323037,
	title = {The Yungul carbonatite dykes associated with the epithermal fluorite deposit at Speewah, Kimberley, Australia: carbon and oxygen isotope constraints on their origin},
	url = {https://m2.mtmt.hu/api/publication/1323037},
	author = {Gwalani, LG and Rogers, KA and Demény, Attila and Groves, DI and Ramsay, R and Beard, A and Downes, PJ and Eves, A},
	doi = {10.1007/s00710-009-0102-1},
	journal-iso = {MINER PETROL},
	journal = {MINERALOGY AND PETROLOGY},
	volume = {98},
	unique-id = {1323037},
	issn = {0930-0708},
	year = {2010},
	eissn = {1438-1168},
	pages = {123-141},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018}
}

@article{MTMT:1237884,
	title = {Combination of off-line preparation and continuous flow mass spectrometry: D/H analyses of inclusion waters},
	url = {https://m2.mtmt.hu/api/publication/1237884},
	author = {Demény, Attila and Siklósy, Zoltán},
	doi = {10.1002/rcm.3473},
	journal-iso = {RAPID COMMUN MASS SPECTR},
	journal = {RAPID COMMUNICATIONS IN MASS SPECTROMETRY},
	volume = {22},
	unique-id = {1237884},
	issn = {0951-4198},
	year = {2008},
	eissn = {1097-0231},
	pages = {1329-1334},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018}
}

@article{MTMT:1016510,
	title = {Crustal contamination of carbonatites indicated by d34S-d13C correlations: Canary Islands, Spain.},
	url = {https://m2.mtmt.hu/api/publication/1016510},
	author = {Demény, Attila and Ahijado, A and Casillas, R and Boyce, A J and Fallick, A E},
	journal-iso = {REV SOC GEOL ESP},
	journal = {REVISTA DE LA SOCIEDAD GEOLOGICA DE ESPANA},
	volume = {12},
	unique-id = {1016510},
	issn = {0214-2708},
	year = {1999},
	pages = {453-460},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018}
}

@article{MTMT:1016505,
	title = {Crustal contamination and fluid/rock interaction in the carbonatites of Fuerteventura (Canary Islands, Spain): a C, O, H isotope study},
	url = {https://m2.mtmt.hu/api/publication/1016505},
	author = {Demény, Attila and Ahijado, A and Casillas, R and Vennemann, T W},
	doi = {10.1016/S0024-4937(98)00050-4},
	journal-iso = {LITHOS},
	journal = {LITHOS},
	volume = {44},
	unique-id = {1016505},
	issn = {0024-4937},
	year = {1998},
	eissn = {1872-6143},
	pages = {101-115},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018}
}

@article{MTMT:1016484,
	title = {Stable isotope studies on carbonate formations in alkaline basalt and lamprophyre series: evolution of magmatic fluids and magma-sediment interactions.},
	url = {https://m2.mtmt.hu/api/publication/1016484},
	author = {Demény, Attila and Harangi, Szabolcs},
	doi = {10.1016/0024-4937(95)00029-1},
	journal-iso = {LITHOS},
	journal = {LITHOS},
	volume = {37},
	unique-id = {1016484},
	issn = {0024-4937},
	year = {1996},
	eissn = {1872-6143},
	pages = {335-349},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018; Harangi, Szabolcs/0000-0003-2372-4581}
}

@article{MTMT:1016474,
	title = {H isotope fractionation due to hydrogen-zinc reactions and its implications on D/H analysis of water samples},
	url = {https://m2.mtmt.hu/api/publication/1016474},
	author = {Demény, Attila},
	doi = {10.1016/0009-2541(94)00155-2},
	journal-iso = {CHEM GEOL},
	journal = {CHEMICAL GEOLOGY},
	volume = {121},
	unique-id = {1016474},
	issn = {0009-2541},
	year = {1995},
	eissn = {1872-6836},
	pages = {19-25},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018}
}

@article{MTMT:1016305,
	title = {Stable isotope and chemical compositions of carbonate ocelli and veins in Mesozoic lamprophyres of Hungary},
	url = {https://m2.mtmt.hu/api/publication/1016305},
	author = {Demény, Attila and Fórizs, István and Molnár, Ferenc},
	doi = {10.1127/ejm/6/5/0679},
	journal-iso = {EUR J MINERAL},
	journal = {EUROPEAN JOURNAL OF MINERALOGY},
	volume = {6},
	unique-id = {1016305},
	issn = {0935-1221},
	year = {1994},
	eissn = {1617-4011},
	pages = {679-690},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018; Fórizs, István/0000-0003-0813-6079; Molnár, Ferenc/0000-0002-1873-1915}
}

@article{MTMT:1255442,
	title = {RARE-GAS CONSTRAINTS ON HYDROCARBON ACCUMULATION, CRUSTAL DEGASSING AND GROUNDWATER-FLOW IN THE PANNONIAN BASIN},
	url = {https://m2.mtmt.hu/api/publication/1255442},
	author = {BALLENTINE, CJ and ONIONS, RK and OXBURGH, ER and Horváth, Ferenc and Deák, József},
	doi = {10.1016/0012-821X(91)90133-3},
	journal-iso = {EARTH PLANET SC LETT},
	journal = {EARTH AND PLANETARY SCIENCE LETTERS},
	volume = {105},
	unique-id = {1255442},
	issn = {0012-821X},
	abstract = {The isotopic composition and abundances of He, Ne and Ar have been
		measured in a sequence of vertically stacked gas reservoirs at
		Hajduszoboszlo and Ebes, in the Pannonian Basin of Hungary. The gas
		reservoirs occur at depths ranging from 727 to 1331 m, are CH4
		dominated and occupy a total rock volume of approximately 1.5 km3. 
		There are systematic variations in both major species abundances and
		rare gas isotopic composition with depth: CO2 and N2 both increase
		from 0.47 and 1.76% to 14.1 and 30.5%, respectively, and Ar-40/Ar-36
		and Ne-21/Ne-22 increase systematically from 340 and 0.02990 at 727 m
		to 1680 and 0.04290 at 1331 m. A mantle-derived He component between 2
		and 5% is present in all samples, the remainder is crustal-radiogenic
		He. The Ar and Ne isotope variations arise from mixing between
		atmosphere-derived components in groundwater, and crustally produced
		radiogenic Ar and Ne. The atmosphere-derived Ar-40 and Ne-21 decreases
		from 85 and 97% of the total Ar-40 and Ne-21 at 727 m to 18 and 68% at
		1331 m. The deepest samples are shown to have both atmosphere-derived
		and radiogenic components close to the air-saturated water and
		radiogenic production ratios. The shallowest samples show significant
		fractionation of He/Ar and Ne/Ar ratios in atmosphere-derived and
		radiogenic rare gas components, but little or no fractionation of He/Ne
		ratios. This suggests that diffusive fractionation of rare gases is
		relatively unimportant and that rare gas solubility partitioning
		between CH4 and H2O phases controls the observed rare gas elemental
		abundances.
		The total abundance of atmosphere-derived and radiogenic rare gas
		components in the Hajduszoboszlo gas field place limits on the minimum
		volume of groundwater that has interacted with the natural gas, and the
		amount of crust that has degassed and supplied radiogenic rare gases. 
		The radiogenic mass balance cannot be accounted for by steady state
		production either within the basin sediments or the basement complex
		since basin formation. The results require that radiogenic rare gases
		are stored at their production ratios on a regional scale and
		transported to the near surface with minimal fractionation. The
		minimum volume of groundwater required to supply the atmosphere-derived
		rare gases would occupy a rock volume of some 1000 km3 (assuming an
		average basin porosity of 5%), a factor of 670 greater than the
		reservoir volume. Interactions between groundwater and the
		Hajduszoboszlo hydrocarbons has been on a greater scale than often
		envisaged in models of hydrocarbon formation and migration.},
	year = {1991},
	eissn = {1385-013X},
	pages = {229-246}
}