@article{MTMT:35984581,
	title = {Preservation and alteration of inclusion-based calcite-water oxygen isotope and clumped isotope temperature signals in calcite veins},
	url = {https://m2.mtmt.hu/api/publication/35984581},
	author = {Demény, Attila and Rinyu, László and Dublyansky, Y and Bajnóczi, Bernadett},
	doi = {10.1038/s41598-025-92824-w},
	journal-iso = {SCI REP},
	journal = {SCIENTIFIC REPORTS},
	volume = {15},
	unique-id = {35984581},
	issn = {2045-2322},
	abstract = {Knowledge of the formation temperatures of geological deposits is essential for investigating their genesis. Oxygen isotope thermometry (OIT), using the temperature dependence of oxygen isotope fractionation between host carbonate mineral and mineral-forming water trapped in fluid inclusions, and clumped isotope thermometry, based on the degree of 13 C and 18 O clumping, are receiving increasing interest. However, only a few studies have applied combinations of these methods, and their databases are limited. In this study, we compare OIT and clumped isotope temperatures obtained for 18 samples from Mesozoic to early Cenozoic calcite veins. Our analysis indicates that the formation temperatures were preserved in the clumped isotopic compositions (16–45 °C), whereas the OIT temperatures were shifted to lower temperatures (− 2 to 33 °C). An OIT temperature shift occurred, due to a retrograde oxygen isotope exchange between the fluid inclusion water and the host calcite. These results imply that the retrograde isotope exchange should be taken into consideration, even for low-temperature carbonate deposits, if a sufficiently long time is available.},
	year = {2025},
	eissn = {2045-2322},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018; Bajnóczi, Bernadett/0000-0003-0006-7611}
}

@article{MTMT:35422709,
	title = {World-class amethyst-agate geodes from Los Catalanes, Northern Uruguay: genetic implications from fluid inclusions and stable isotopes},
	url = {https://m2.mtmt.hu/api/publication/35422709},
	author = {Arduin-Rode, Fiorella and Sosa, Graciela and van den Kerkhof, Alfons and Krüger, Yves and Bajnai, Dávid and Pack, Andreas and Di Rocco, Tommaso and Oyhantçabal, Pedro and Wemmer, Klaus and Herwartz, Daniel and Klipsch, Swea and Wiegand, Bettina and Siegesmund, Siegfried and Hueck, Mathias},
	doi = {10.1007/s00126-024-01310-2},
	journal-iso = {MINER DEPOSITA},
	journal = {MINERALIUM DEPOSITA},
	volume = {2024},
	unique-id = {35422709},
	issn = {0026-4598},
	abstract = {The amethyst and agate geodes from the Los Catalanes Gemmological District in Uruguay represent one of the main deposits of its kind worldwide. The geometry of the deposit is horizontal, with an irregular distribution of amethyst geodes within the upper level of the basalt lava flows and shows strong variations in their abundance, as well as quality, geometry, and shape. Reliable exploration guides are scarce, and the limited knowledge of the geological parameters controlling its occurrence makes exploration unpredictable, leading to inaccurate reserve estimation. Based on cutting-edge methods including nucleation-assisted microthermometry of one-phase fluid inclusions and determination of triple oxygen isotope in silicates and carbonates, as well as analysis of geode-hosted water and groundwater, we estimate the crystallisation temperatures in the range between 15 and 60 °C. These low temperatures point to amethyst crystallisation after the emplacement of the complete basalt pile. The mineralising fluid shows isotopic signatures consistent with meteoric water and very low salinities from pure water up to rarely over 3 wt% NaCl-eq., likely sourced from the groundwater hosted in the aquifers in the basaltic sequence and underlying units. Based on the insights provided by the new data, we propose the combination of open- and closed-system crystallisation inside pre-existing cavities due to the episodic infiltration of meteoric water in a rather stable geological context.},
	year = {2024},
	eissn = {1432-1866},
	orcid-numbers = {Arduin-Rode, Fiorella/0009-0001-5599-6699; Sosa, Graciela/0009-0005-3442-6223; van den Kerkhof, Alfons/0000-0001-5387-9766; Krüger, Yves/0000-0002-3054-6499; Bajnai, Dávid/0000-0002-4053-5056; Pack, Andreas/0000-0002-2618-2768; Di Rocco, Tommaso/0000-0003-0417-6364; Oyhantçabal, Pedro/0000-0001-5145-9709; Wemmer, Klaus/0000-0002-7818-5135; Herwartz, Daniel/0000-0003-3604-8295; Klipsch, Swea/0000-0003-3195-4360; Hueck, Mathias/0000-0001-8911-4124}
}

@article{MTMT:35209241,
	title = {Nucleation-assisted microthermometry: A novel application to fluid inclusions in halite},
	url = {https://m2.mtmt.hu/api/publication/35209241},
	author = {Arnuk, William D. and Guillerm, Emmanuel and Lowenstein, Tim K. and Krüger, Yves and Olson, Kristian J. and Lensky, Nadav G. and Brauer, Achim},
	doi = {10.1016/j.chemgeo.2024.122318},
	journal-iso = {CHEM GEOL},
	journal = {CHEMICAL GEOLOGY},
	volume = {667},
	unique-id = {35209241},
	issn = {0009-2541},
	year = {2024},
	eissn = {1872-6836}
}

@article{MTMT:35085809,
	title = {A speleogenetic history of Novoafonskaya Cave in the Western Caucasus},
	url = {https://m2.mtmt.hu/api/publication/35085809},
	author = {Chervyatsova, O and Potapov, S and Baker, J and Gavryushkin, D and Polyak, V and Heizler, M and Tokarev, S and Sadykov, S and Dbar, R and Dublyansky, Y},
	doi = {10.5038/1827-806X.53.2.2499},
	journal-iso = {INT J SPELEOL},
	journal = {INTERNATIONAL JOURNAL OF SPELEOLOGY},
	volume = {53},
	unique-id = {35085809},
	issn = {0392-6672},
	abstract = {Speleogenesis in hypogene karst settings may be closely tied to regional tectonic dynamics and concomitant hydrochemical evolution of karst waters. However, placing temporal constraints on these processes can require a wider array of field observations and techniques than for typical karst systems. Herein, we present a comprehensive study of Novoafonskaya Cave (Western Caucasus, Abkhazia). The updated speleogenetic history of the cave comprises four stages: (1) the most ancient, a low-T hydrothermal (ca. 40–50°C) priming stage; (2) the main stage enabled by mixing of upwelling thermomineral and locally recharged common karst waters; (3) the late sulfuric-acid speleogenesis (SAS) stage, which left significant mineralogical overprint (gypsum and a suite of minerals resulting from the alteration of silicate sediments) but did not alter the morphology of the cave appreciably; and (4) the contemporary stage, occurring predominantly in the phreatic and epiphreatic zones. Ages of speleogenetic stages were constrained by radiometric dating (230Th-U and 40Ar/39Ar) and paleomagnetic data, alongside the Quaternary geological history of the region and paleodynamics of the Black Sea level. Conditions for the low-T hydrothermal karstification occurred from Miocene – Middle Pliocene. The main stage, which created the main volumes of the cave, took place from Late Pliocene – Middle Pleistocene. The cave emerged from the phreatic into the vadose zone after ca. 400 ka ago, due to the combined effect of the Black Sea regression and intensification of tectonic uplift in the Caucasus. The presence of sulfidic waters during dewatering led to the development of transient SAS processes during Middle to Late Pleistocene. Dating of calcite underlying SAS-associated overgrowths constrains the cessation of this SAS activity to within the last 147 ka. In its present state, the cave has no connection with thermomineral waters; however, such waters are found deeper in the southern parts of the karst massif (based on the hydrochemistry of Psyrtskha spring), implying that hypogene karstification, primarily driven by mixing corrosion, may still be active deep in the phreatic zone.},
	year = {2024},
	eissn = {1827-806X},
	pages = {89-110}
}

@article{MTMT:34659670,
	title = {Subaqueous carbonate speleothems as paleotemperature archives – clumped isotope thermometry and stable isotope compositions of inclusion-hosted wate},
	url = {https://m2.mtmt.hu/api/publication/34659670},
	author = {Demény, Attila and Berentés, A and Rinyu, László and Kovács, Ivett and Surányi, Gergely and Virág, Magdolna},
	doi = {10.5038/1827-806X.53.1.2480},
	journal-iso = {INT J SPELEOL},
	journal = {INTERNATIONAL JOURNAL OF SPELEOLOGY},
	volume = {53},
	unique-id = {34659670},
	issn = {0392-6672},
	abstract = {Clumped isotope measurements of carbonates and stable isotope analyses of water trapped in fluid inclusions are both promising techniques to determine carbonate formation temperatures. Cave-hosted carbonate deposits (speleothems) are excellent targets for such studies, but kinetic fractionations and diagenetic influences frequently deteriorate the temperature data obtained from these methods. However, subaqueous carbonate deposits may provide reliable data, as kinetic fractionations are less significant in underwater environments. In this study, subaqueous speleothems, whose formation temperatures were directly measured in the water, were investigated. Additionally, temperatures calculated from the oxygen isotope fractionations between calcite and fluid inclusion-hosted water were compared with clumped isotope temperatures obtained for subaqueous carbonate formations in cave-hosted lakes. The clumped isotope temperatures fit the measured and calculated fluid inclusion temperatures within the analytical precisions. Carbonate deposits formed at elevated temperatures (~50°C or above) may undergo post-formational calcite-water oxygen isotope exchange, altering the composition of the inclusion-hosted water. In contrast, subaqueous speleothems formed at about 20-25°C appear to preserve the primary isotopic compositions. Our study shows that subaqueous carbonate speleothems are useful targets for clumped isotope and inclusion water analyses, making them valuable paleotemperature archives.},
	year = {2024},
	eissn = {1827-806X},
	pages = {25-37},
	orcid-numbers = {Demény, Attila/0000-0003-0522-9018; Kovács, Ivett/0000-0001-7015-7909; Virág, Magdolna/0000-0001-6104-1963}
}

@article{MTMT:35480476,
	title = {Precipitation of CaCO3 in natural and man-made aquatic environments - mechanisms, analogues, and proxies},
	url = {https://m2.mtmt.hu/api/publication/35480476},
	author = {Dietzel, M and Boch, R},
	doi = {10.1016/j.chemer.2024.126206},
	journal-iso = {CHEM ERDE-GEOCHEM},
	journal = {CHEMIE DER ERDE-GEOCHEMISTRY},
	volume = {84},
	unique-id = {35480476},
	issn = {0009-2819},
	year = {2024},
	eissn = {1611-5864}
}

@article{MTMT:35475306,
	title = {Late-stage evolution of hypogene caves at Tyuya-Muyun (Kyrgyzstan): Quantitative insights from mineral deposits},
	url = {https://m2.mtmt.hu/api/publication/35475306},
	author = {Koltai, G and Spötl, C and Rinyu, László and Honiat, C and Racine, T and Zhang, H and Krüger, Y and Dublyansky, Y},
	doi = {10.1016/j.chemgeo.2024.122454},
	journal-iso = {CHEM GEOL},
	journal = {CHEMICAL GEOLOGY},
	volume = {670},
	unique-id = {35475306},
	issn = {0009-2541},
	year = {2024},
	eissn = {1872-6836}
}