@article{MTMT:34762210,
	title = {Raman–Infrared Spectral Correlation of an Artificially Space-Weathered Carbonaceous Chondrite Meteorite},
	url = {https://m2.mtmt.hu/api/publication/34762210},
	author = {Gyollai, Ildikó and Biri, Sándor and Juhász, Zoltán and Király, Csilla and Rácz, Richárd Péter and Rezes, Dániel and Sulik, Béla and Szabó, Máté Zoltán and Szalai, Zoltán and Szávai, P and Szklenár, Tamás and Kereszturi, Ákos},
	doi = {10.3390/min14030288},
	journal-iso = {MINERALS-BASEL},
	journal = {MINERALS},
	volume = {14},
	unique-id = {34762210},
	abstract = {Raman and infrared measurements of the same locations were conducted on a northwest African (NWA) 10580 CO3 meteorite sample, before and after three proton irradiations (1 keV ion energy using 1011, 1014, and 1017 ion/cm2 fluent values), to simulate space weathering effects. In the case of Raman spectroscopy, both FWHM and peak positions of the major olivine and pyroxene bands changed after the irradiation, and the minor bands disappeared. In the FTIR spectra, the minor bands of olivine and pyroxene also disappeared; meanwhile, major IR bands of pyroxene remained visible, demonstrating both positive and negative peak shifts, and the olivines were characterised only by negative peak shifts. The olivines were characterised by negative FWHM changes for major bands, but positive FWHM changes for minor bands. The pyroxenes were characterised by elevated FWHM changes for minor bands after the irradiation. The disappearance of minor bands both of IR and Raman spectra indicates the amorphization of minerals. The negative peak shift in IR spectra indicates Mg loss for olivine and pyroxene, in agreement with the literature. The Raman spectra are characterised by positive peak shift and positive FWHM changes; the IR spectra are characterised by a negative peak shift. The Mg loss, which was detected by negative peak shifts of FTIR bands, may be caused by distortion of the crystal structure, which could be detected by a positive peak shift in Raman spectra. This joint observation and interpretation has not been formulated in the literature, but indicates further possibilities in the confirmation of mineral changes by different instruments. Shock alteration-based observations by other researchers could be used as a reference for irradiation experiments as irradiation makes a similar structural alteration, like a low-grade shock metamorphism.},
	year = {2024},
	eissn = {2075-163X},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Rezes, Dániel/0000-0003-0730-2418; Szalai, Zoltán/0000-0001-5267-411X}
}

@article{MTMT:34530343,
	title = {Bacteria-Driven Fossil Ecosystems as Paleoindicators of Active Continental Margins and the Role of Carbonate Sediment-Hosted Vents in Geodynamic Reconstructions},
	url = {https://m2.mtmt.hu/api/publication/34530343},
	author = {Bujtor, László and Gyollai, Ildikó and Szabó, Máté Zoltán and Kovács, Ivett and Polgári, Márta Piroska},
	doi = {10.3390/min14020125},
	journal-iso = {MINERALS-BASEL},
	journal = {MINERALS},
	volume = {14},
	unique-id = {34530343},
	abstract = {Continental rifting of the Tisza microplate started during the Late Jurassic and resulted in phreatic eruptions, peperite, and the construction of a volcanic edifice in the Early Cretaceous in the Mecsek Mountains (South Hungary). In the SE direction from the volcanic edifice at Zengővárkony, a shallow marine (depth 100–200 m) carbonate sediment hosted a vent environment, and iron ore deposition occurred at the end of the Valanginian to early Hauterivian, hosting a diverse, endemic fauna of approximately 60 species. The detailed mineralogical analysis of the transport conduits included Fe oxides (ferrihydrite, goethite, hematite, and magnetite), quartz, mixed carbonate, pyrite, feldspar, Fe-bearing clay minerals, apatite, sulfates (barite, gypsum, and jarosite), and native sulfur. Filamentous, microbially mediated microtextures with inner sequented, necklace-like spheric forms (diameter of 1 μm) and bacterial laminae are also observed inside decapod crustacean coprolites (Palaxius tetraochetarius) and in the rock matrix. This complex ecological and mineralogical analysis provided direct evidence for the presence of bacteria in fossil sediment-hosted vent (SHV) environments on the one hand and for the intimate connection between bacteria and decapod crustaceans in hydrothermal environments 135 Ma before. This observation completes the fossil food chain of chemosynthesis-based ecosystems, from primary producers to the top carnivores reported for the first time from this locality.},
	year = {2024},
	eissn = {2075-163X},
	orcid-numbers = {Bujtor, László/0000-0001-9699-7711; Gyollai, Ildikó/0000-0001-8576-0196; Kovács, Ivett/0000-0001-7015-7909}
}

@article{MTMT:34499100,
	title = {Irradiation induced mineral changes of NWA10580 meteorite determined by infrared analysis},
	url = {https://m2.mtmt.hu/api/publication/34499100},
	author = {Gyollai, Ildikó and Biri, Sándor and Juhász, Zoltán and Király, Csilla and Pal, B.D. and Rácz, Richárd Péter and Rezes, Dániel and Sulik, Béla and Szabó, Máté Zoltán and Szalai, Zoltán and Szavai, P. and Szklenár, Tamás and Kereszturi, Ákos},
	doi = {10.1051/0004-6361/202347467},
	journal-iso = {ASTRON ASTROPHYS},
	journal = {ASTRONOMY & ASTROPHYSICS},
	volume = {683},
	unique-id = {34499100},
	issn = {0004-6361},
	abstract = {Identifying minerals on asteroid surfaces is difficult as space weathering modifies the minerals' infrared spectra. This should be better understood for proper interpretation. We simulated the space weathering effects on a meteorite and recorded the alterations of the crystalline structure, such as the change in peak positions and full width at half maximum values. We used proton irradiation to simulate the effects of solar wind on a sample of NWA 10580 CO3 chondrite meteorites. After irradiation in three gradually increased steps with 1 keV ion energy, we used infrared microscopic reflectance and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to identify and understand the consequences of irradiation. We find negative peak shifts after the first and second irradiations at pyroxene and feldspar minerals, similarly to the literature, and this shift was attributed to Mg loss. However, after the third irradiation a positive change in values in wavenumber emerged for silicates, which could come from the distortion of SiO tetrahedra, resembling shock deformation. The full width at half maximum values of major bands show a positive (increasing) trend after irradiations in the case of feldspars, using IR reflection measurements. Comparing DRIFTS and reflection infrared data, the peak positions of major mineral bands were at similar wavenumbers, but differences can be observed in minor bands . We measured the spectral changes of meteorite minerals after high doses of proton irradiation for several minerals. We show the first of these measurements for feldspars; previous works only presented pyroxene, olivine, and phyllosilicates.},
	year = {2024},
	eissn = {1432-0746},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Rezes, Dániel/0000-0003-0730-2418; Szalai, Zoltán/0000-0001-5267-411X}
}

@article{MTMT:34158142,
	title = {Microbially-induced K enrichments in hydrothermally altered andesitic tuffs},
	url = {https://m2.mtmt.hu/api/publication/34158142},
	author = {Polgári, Márta Piroska and Nagy, Béla and Fintor, Krisztián and Gyollai, Ildikó and Kovács, Ivett and Szabó, Máté Zoltán and Mojzsis, Stephen, James},
	doi = {10.1016/j.oregeorev.2023.105630},
	journal-iso = {ORE GEOL REV},
	journal = {ORE GEOLOGY REVIEWS},
	volume = {162},
	unique-id = {34158142},
	issn = {0169-1368},
	year = {2023},
	eissn = {1872-7360},
	orcid-numbers = {Fintor, Krisztián/0000-0003-4794-9419; Gyollai, Ildikó/0000-0001-8576-0196; Kovács, Ivett/0000-0001-7015-7909}
}

@article{MTMT:34019604,
	title = {Zinc, carbon, and oxygen isotopic variations associated with the Marinoan deglaciation},
	url = {https://m2.mtmt.hu/api/publication/34019604},
	author = {Thiemens, MM. and Shaheen, R and Gerritzen, CT. and Gyollai, Ildikó and Chong, K and Popp, F and Koeberl, C and Thiemens, MH. and Moynier, F},
	doi = {10.1007/s00710-023-00827-0},
	journal-iso = {MINER PETROL},
	journal = {MINERALOGY AND PETROLOGY},
	volume = {117},
	unique-id = {34019604},
	issn = {0930-0708},
	abstract = {The "Snowball Earths" were cataclysmic events during the late Neoproterozoic's Cryogenian period (720-635 Ma) in which most, if not all, of Earth’s surface was covered in ice. Paleoenvironmental reconstructions of these events utilize isotopic systems, such as Δ 17 O and barium isotopes of barites. Other isotopic systems, such as zinc (Zn), can reflect seawater composition or environmental conditions (e.g., temperature changes) and biological productivity. We report here a multi-isotopic C, O, and Zn data set for carbonates deposited immediately after the Marinoan glaciation (635 Ma) from the Otavi Group in northern Namibia. In this study, we chemically separated calcite and non-calcitic carbonate phases, finding isotopically distinct carbon and oxygen isotopes. These could reflect changes in the source seawater composition and conditions during carbonate formation. Our key finding is largescale Zn isotopic variations over the oldest parts of the distal foreslope cap carbonate sections. The magnitude of variation is larger than any found throughout post-snowball cap carbonates to date, and in a far shorter sequence. This shows a heretofore undiscovered difficulty for Zn isotopic interpretations. The primary Zn sources are likely to be aeolian or alluvial, associated with the massive deglaciation related run-off from the thawing continent and a greater exposed surface for atmospheric aerosol entrainment. The samples with the lightest Zn isotopic compositions (δ 66 Zn < 0.3 ‰) potentially reflect hydrothermally sourced Zn dominating the carbonates’ Zn budget. This finding is likely unique to the oldest carbonates, when the meltwater lid was thinnest and surface waters most prone to upwelling of hydrothermally dominated Snowball Earth brine. On the other hand, local variations could be related to bioproductivity affecting the Zn isotopic composition of the seawater. Similarly, fluctuations in sea-level could bring the depositional site below and above a redoxcline, causing isotopic variations. These variations in Zn isotope ratios preclude the estimation of a global Zn isotopic signature, potentially indicating localized resumption of export production.},
	year = {2023},
	eissn = {1438-1168},
	pages = {373-386},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196}
}

@misc{MTMT:33766194,
	title = {Bacteria driven fossil ecosystems as indicator of active continental margins in the geological past. Usefulness of carbonate sediment hosted vent environments in geodynamic reconstructions},
	url = {https://m2.mtmt.hu/api/publication/33766194},
	author = {Bujtor, László and Gyollai, Ildikó and Szabó, Máté Zoltán and Kovács, Ivett and Polgári, Márta Piroska},
	doi = {10.21203/rs.3.rs-2670327/v1},
	unique-id = {33766194},
	year = {2023},
	orcid-numbers = {Bujtor, László/0000-0001-9699-7711; Gyollai, Ildikó/0000-0001-8576-0196; Kovács, Ivett/0000-0001-7015-7909}
}

@article{MTMT:33632051,
	title = {Multiple generation magmatic and hydrothermal processes in a Martian subvolcanic environment based on the analysis of Yamato‐000593 nakhlite meteorite},
	url = {https://m2.mtmt.hu/api/publication/33632051},
	author = {Gyollai, Ildikó and Chatzitheodoridis, E and Kereszturi, Ákos and Szabó, Máté Zoltán},
	doi = {10.1111/maps.13950},
	journal-iso = {METEORIT PLANET SCI},
	journal = {METEORITICS & PLANETARY SCIENCE},
	volume = {58},
	unique-id = {33632051},
	issn = {1086-9379},
	year = {2023},
	eissn = {1945-5100},
	pages = {218-240},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196}
}

@article{MTMT:33525794,
	title = {Formation and shock impact history of the Csatalja ordinary chondrite},
	url = {https://m2.mtmt.hu/api/publication/33525794},
	author = {Gyollai, Ildikó and Kereszturi, Ákos and Chatzitheodoridis, E and Kereszty, Zs and Szabó, Máté Zoltán and Király, Csilla and Szalai, Zoltán},
	doi = {10.1111/maps.13931},
	journal-iso = {METEORIT PLANET SCI},
	journal = {METEORITICS & PLANETARY SCIENCE},
	volume = {58},
	unique-id = {33525794},
	issn = {1086-9379},
	year = {2023},
	eissn = {1945-5100},
	pages = {2-24},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Szalai, Zoltán/0000-0001-5267-411X}
}

@article{MTMT:33334427,
	title = {Review of meteorite irradiation tests to support next C-type asteroid missions},
	url = {https://m2.mtmt.hu/api/publication/33334427},
	author = {Kereszturi, Ákos and Gyollai, Ildikó and Juhász, Zoltán and Pál, Bernadett and Rácz, Richárd Péter and Rezes, Dániel and Sulik, Béla},
	doi = {10.1093/mnras/stac3587},
	journal-iso = {MON NOT R ASTRON SOC},
	journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
	volume = {519},
	unique-id = {33334427},
	issn = {0035-8711},
	abstract = {Effect of space weathering of airless asteroids could be better understood by artificial irradiation tests on meteorites in laboratories. This work surveys the infrared and Raman analysis based interpretation of simulated charged particle irradiation tests in order to better understand near future observational possibilities of asteroid visiting missions and also to support the planning of next missions and directions of detector improvement. Recent works properly targeted different meteors and meteor relevant minerals, evaluating bulk meteorite spectra, During the irradiation tests He+, (Ne+, Kr+) and Ar+ ions were used with fluxes characteristic for inner planetary system solar wind, considering 1-10 million year exposure durations. Although main meteorite minerals were irradiated and analysed, one missing aspect is that only bulk analysis have been done, not minerals separately in their original embedded context. Some Earth based mineral references were also analysed, however they might not necessary behave similar to the same type of reference minerals, and irradiation effect is poorly known for feldspar, troilite, magnetite. Darkening should be also further analysed for separate minerals too, together with the record of peak shape and position changes. Infrared ATR analysis might still provide such data in the future using the recently emerged technology, as well as Raman analysis - however for flyby missions’ infrared is the useful method while Raman can be used only at in-situ missions. The overview including the tables to support the identification of specific missing information related gaps in our current knowledge and directions for future research.},
	year = {2023},
	eissn = {1365-2966},
	pages = {3947-3957},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Rezes, Dániel/0000-0003-0730-2418}
}

@article{MTMT:33315267,
	title = {Comparison of two different infrared spectral analysis based evaluation of impact induced shock events of the Chelyabinsk meteorite},
	url = {https://m2.mtmt.hu/api/publication/33315267},
	author = {Kereszturi, Ákos and Gyollai, Ildikó and Szabó, Máté Zoltán and Skultéti, Ágnes},
	doi = {10.1016/j.icarus.2022.115377},
	journal-iso = {ICARUS},
	journal = {ICARUS},
	volume = {394},
	unique-id = {33315267},
	issn = {0019-1035},
	year = {2023},
	eissn = {1090-2643},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196}
}