@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:34082661, title = {A speleothem record of seasonality and moisture transport around the 8.2 ka event in Central Europe (Vacska Cave, Hungary)}, url = {https://m2.mtmt.hu/api/publication/34082661}, author = {Demény, Attila and Czuppon, György and Kern, Zoltán and Hatvani, István Gábor and Topál, Dániel and Karlik, Máté and Surányi, Gergely and Molnár, Mihály and Kiss, Gabriella Ilona and Szabó, Máté Zoltán and Shen, CC and Hu, HM and May, Zoltán}, doi = {10.1017/qua.2023.33}, journal-iso = {QUATERNARY RES}, journal = {QUATERNARY RESEARCH}, volume = {118}, unique-id = {34082661}, issn = {0033-5894}, year = {2024}, eissn = {1096-0287}, pages = {195-210}, orcid-numbers = {Demény, Attila/0000-0003-0522-9018; Czuppon, György/0000-0002-7231-6042; Kern, Zoltán/0000-0003-4900-2587; Hatvani, István Gábor/0000-0002-9262-7315} } @CONFERENCE{MTMT:34526407, title = {Dunai ártéri üledékek ásványtani összetétele óbudai régészeti feltárásokban}, url = {https://m2.mtmt.hu/api/publication/34526407}, author = {Viczián, István and Viczián, I and Szabó, Máté Zoltán}, booktitle = {18. Téli Ásványtudományi Iskola}, unique-id = {34526407}, year = {2023} } @article{MTMT:34478176, title = {Archaeometric Investigation of a Hunnic-Period Sacrificial Assemblage from Nyergesújfalu, Hungary}, url = {https://m2.mtmt.hu/api/publication/34478176}, author = {Mozgai, Viktória and Schilling, László and Szabó, Máté Zoltán and Bajnóczi, Bernadett}, doi = {10.24916/iansa.2023.2.2}, journal-iso = {INTERDISCIP ARCHAEOL}, journal = {INTERDISCIPLINARIA ARCHAEOLOGICA - NATURAL SCIENCES IN ARCHAEOLOGY}, volume = {14}, unique-id = {34478176}, issn = {1804-848X}, abstract = {Near Nyergesújfalu (Komárom-Esztergom County, Hungary), objects of a Hunnic-period sacrificial assemblage were found in 2021. The Hunnic period assemblage contains fifteen items altogether: four gold lunular mounts, six cellwork-decorated gold oval mounts, two cellwork-decorated gold suspension rings, two gold buckles and fragments of a scale-patterned gilded silver plate. The present study aims to determine the elemental composition of the metal alloy of the Hunnic-period objects and characterise the decoration techniques (gilding and garnet inlays) by using optical microscopy, handheld X-ray fluorescence spectrometry (hXRF) and scanning electron microscopy with energydispersive X-ray spectrometry (SEM-EDX). The gold objects, including their small parts such as the rivets of buckles and lunular mounts, sockets and filigree, were manufactured from a relatively goodquality gold alloy (>80 wt% Au). The fragments of the scale-patterned silver plate were manufactured from a high-quality silver alloy (>94 wt% Ag), similar to late Roman silver alloys characterised by high Ag content, and was decorated with fire (mercury) gilding. The garnets used for inlays are almandine and intermediate pyrope-almandine garnets. Based on their chemistry, the garnets belong to Group X and probably originate from the placer deposits of Sri Lanka.}, year = {2023}, eissn = {2336-1220}, pages = {167-181}, orcid-numbers = {Mozgai, Viktória/0000-0001-9712-2773; Bajnóczi, Bernadett/0000-0003-0006-7611} } @{MTMT:34158267, title = {Dolomitos mésziszap dunai ártéri üledékekben a budapesti Római-parton}, url = {https://m2.mtmt.hu/api/publication/34158267}, author = {Viczián, I id and Viczián, István and Szabó, Máté Zoltán}, booktitle = {13. Kőzettani és Geokémiai Vándorgyűlés}, unique-id = {34158267}, year = {2023}, pages = {31-32} } @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} } @{MTMT:34152722, title = {Egy különleges neolitikus agyagtábla vizsgálata}, url = {https://m2.mtmt.hu/api/publication/34152722}, author = {Kreiter, Attila and Györkös, Dorottya and Raczky, Pál and Füzesi, András and Bajnóczi, Bernadett and Szabó, Máté Zoltán and Sipos, György and May, Zoltán}, booktitle = {NRInfo 2022}, unique-id = {34152722}, year = {2023}, pages = {106-107}, orcid-numbers = {Raczky, Pál/0000-0001-5556-723X; Füzesi, András/0000-0002-5039-8593; Bajnóczi, Bernadett/0000-0003-0006-7611; Sipos, György/0000-0001-6224-2361} } @{MTMT:34146868, title = {7.3. X-ray diffraction analysis of the pottery from the Mödling region}, url = {https://m2.mtmt.hu/api/publication/34146868}, author = {Bajnóczi, Bernadett and Szabó, Máté Zoltán and Tóth, Mária}, booktitle = {Mödling–Jennyberg. A Hilltop Settlement of the Boleráz and Leithaprodersdorf Cultures}, unique-id = {34146868}, year = {2023}, pages = {660-666}, orcid-numbers = {Bajnóczi, Bernadett/0000-0003-0006-7611} }