@{MTMT:33116823,
	title = {Környezetrekonstrukció geokémiai vizsgálatok segítségével a Bolatau-Feredeu tó 500 éves üledékén},
	url = {https://m2.mtmt.hu/api/publication/33116823},
	author = {Karlik, Máté and Törőcsik, GT and Bozsó, Gábor and Fekete, József},
	booktitle = {Calce et malleo – Mésszel és kalapáccsal},
	unique-id = {33116823},
	year = {2022},
	pages = {67-68}
}

@article{MTMT:32535952,
	title = {Natural and anthropogenic impacts reflected by paleoclimate proxy parameters in a lake-forest system in Bukovina, Romania},
	url = {https://m2.mtmt.hu/api/publication/32535952},
	author = {Karlik, Máté and Vancsik, Anna and Szalai, Zoltán and Mîndrescu, M and Grădinaru, I and Vágási, S and Bozsó, Gábor and Fekete, József},
	doi = {10.15201/hungeobull.70.4.4},
	journal-iso = {HUNG GEOGR BULL (2009-)},
	journal = {HUNGARIAN GEOGRAPHICAL BULLETIN (2009-)},
	volume = {70},
	unique-id = {32535952},
	issn = {2064-5031},
	year = {2021},
	eissn = {2064-5147},
	pages = {339-351},
	orcid-numbers = {Szalai, Zoltán/0000-0001-5267-411X; Mîndrescu, M/0000-0003-2291-4877}
}

@article{MTMT:31143179,
	title = {Biogenesis of the neoproterozoic kremydilite manganese ores from urucum (brazil) – a new manganese ore type},
	url = {https://m2.mtmt.hu/api/publication/31143179},
	author = {Biondi, CJ and Polgári, Márta Piroska and Gyollai, Ildikó and Fintor, Krisztián and Kovács, Ivett and Fekete, József and Mojzsis, Stephen, James},
	doi = {10.1016/j.precamres.2020.105624},
	journal-iso = {PRECAMBRIAN RES},
	journal = {PRECAMBRIAN RESEARCH},
	volume = {340},
	unique-id = {31143179},
	issn = {0301-9268},
	abstract = {The Urucum district in Mato Grosso do Sul (Brazil), hosts the youngest and largest sedimentary Mn ore of Neoproterozoic age; units Mn-1, Mn-2, and Mn-3 are found in jaspilites and ironstones, and represent approximately 600 Mt of extractable rock with 27-44% Mn and 12-30% Fe. High-resolution optical- and cathodoluminescence microscopy, as well as Raman and FTIR spectroscopy show that the lower Mn-1 is ferruginous, while the upper Mn-1 consists mainly of 30-75 vol% braunite, < 0.5% aegirine, 3-15% quartz, 5-10% feldspar, and 1-5% clay minerals, including apatite, chlorite, and organic matter. Here, we model the control of this ore mineralogy by homogeneous oxidation and microbial processes. Layers Mn-2 and Mn-3 contain kremydilite, as a characteristic ore structure, with 77-95 vol% cryptomelane, 0-23% hollandite, 9-19% braunite, 7-21% hematite, and 0-5% pores filled with clay minerals and organic matter. These are present within a micro-nodule matrix composed of cryptomelane and hematite in varying proportions. The first syngenetic products of microbial enzymatic oxidation were, on the Fe side, ferrihydrite and lepidocrocite, and on the Mn side, vernadite, todorokite, birnessite, and manganite. These formed under obligatory oxic (Mn) and suboxic (Fe) conditions and close to neutral pH. We describe the genesis of Urucum via complex diagenetic processes, which include the decomposition and mineralization of cellular- and extracellular-polymeric substances from Fe and Mn bacteria and cyanobacteria. The kremydilite forms in successive stages of oxidation of organic matter mediated by microbes, which generate pores and produce methane and CO2/H-2 bubbles. They are a unique type of diagenetic structure formed by heterotrophic cell colonies randomly activated in the microbialite milieu following burial in suboxic neutral/alkaline conditions, side-by-side with the lithification and stabilization of the mineral assemblages.Significance statement The Neoproterozoic Urucum manganese deposit (Brazil) is a similar to 600 Mt microbially-mediated sedimentary Mn ore. Proto-ore formation via sedimentation and diagenesis occurred under suboxicoxic-oxic and semi-neutral pH conditions in the Ediacaran ocean, wherein microbial Mn(II) oxidation ensued from the fine-grained accumulation of Mn oxides and organic matter. Oxic conditions that facilitated enzymatic Mn oxidation and overwhelmed microbial Fe oxidation appears as a sharp contact between manganese and iron beds. The Urucum deposit arose from a complex suite of diagenetic processes, including decomposition and mineralization of microbially-derived organic matter involving extracellular polymeric substances. Kremydilite - a new type of diagenetic concentric Mn mineral structure formed by randomly activated heterotrophic cell colonies that generated pores in the microbialite sediment after burial, coincident with lithification.},
	year = {2020},
	eissn = {1872-7433},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Fintor, Krisztián/0000-0003-4794-9419; Kovács, Ivett/0000-0001-7015-7909}
}

@CONFERENCE{MTMT:30753152,
	title = {Hydrocarbon generation potential of Paleogene sediments in the Hungarian Paleogene Basin},
	url = {https://m2.mtmt.hu/api/publication/30753152},
	author = {Körmös, Sándor and Fekete, József and Milota, Katalin and Schubert, Félix},
	booktitle = {AAPG Europe Regional Conference, 2019: Paratethys Petroleum Systems Between Central Europe and the Caspian Region : Book of Abstracts},
	unique-id = {30753152},
	year = {2019},
	pages = {118},
	orcid-numbers = {Körmös, Sándor/0000-0003-4439-6804; Schubert, Félix/0000-0001-8647-5354}
}

@article{MTMT:30393777,
	title = {Microbial metallogenesis of Cryogenian manganese ore deposits in South China},
	url = {https://m2.mtmt.hu/api/publication/30393777},
	author = {Yu, W and Polgári, Márta Piroska and Gyollai, Ildikó and Fintor, Krisztián and Szabó, Máté Zoltán and Kovács, Ivett and Fekete, József and Du, Y and Zhou, Qi},
	doi = {10.1016/j.precamres.2019.01.004},
	journal-iso = {PRECAMBRIAN RES},
	journal = {PRECAMBRIAN RESEARCH},
	volume = {322},
	unique-id = {30393777},
	issn = {0301-9268},
	year = {2019},
	eissn = {1872-7433},
	pages = {122-135},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Fintor, Krisztián/0000-0003-4794-9419; Kovács, Ivett/0000-0001-7015-7909}
}

@{MTMT:32868891,
	title = {MICROBIAL FOOTPRINT IN LAKE SEDIMENTS FROM CENTRAL EUROPE},
	url = {https://m2.mtmt.hu/api/publication/32868891},
	author = {Karlik, Máté and Gyollai, Ildikó and Fekete, József and Mindrescu, M and Grădinaru, I and Kovács, János and Polgári, Márta Piroska},
	booktitle = {20th International Sedimentological Congress,},
	unique-id = {32868891},
	year = {2018},
	pages = {1},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Kovács, János/0000-0001-7742-5515}
}

@{MTMT:3419614,
	title = {High-resolution sedimentology study of laminated lake sediment fromEast Carpathian Mountains, Romania},
	url = {https://m2.mtmt.hu/api/publication/3419614},
	author = {Karlik, Máté and Gyollai, Ildikó and Fekete, József and Bozsó, Gábor and Fintor, Krisztián and Polgári, Márta Piroska},
	booktitle = {XXI International Congress of the CBGA, Abstracts: Advances of Geology in southeast European mountain belts},
	unique-id = {3419614},
	year = {2018},
	pages = {115-116},
	orcid-numbers = {Gyollai, Ildikó/0000-0001-8576-0196; Fintor, Krisztián/0000-0003-4794-9419}
}

@article{MTMT:3392243,
	title = {Natural and anthropogenic changes in a lake-forest system in Bukovina (Romania) since 1340 AD documented by sedimentary organic geochemistry (C, N and n-alkanes)},
	url = {https://m2.mtmt.hu/api/publication/3392243},
	author = {Karlik, Máté and Fekete, József and Mindrescu, M and Grădinaru, I and Bozsó, Gábor and Biró, Lóránt and Kern, Zoltán},
	doi = {10.1016/j.quaint.2018.06.008},
	journal-iso = {QUATERN INT},
	journal = {QUATERNARY INTERNATIONAL},
	volume = {493},
	unique-id = {3392243},
	issn = {1040-6182},
	abstract = {Lake Bolatau-Feredeu is a small (surface: 0.3 ha; catchment area: 31 ha) landslide-dammed lake in Bukovina (Eastern Carpathians, Romania). Elemental concentration, stable isotope composition of carbon and nitrogen, and n-alkane composition of the saturated hydrocarbon fraction of the organic material were analyzed along the sediment profile from Lake Bolatau-Feredeu covering the past 700 years. The ranges of delta C-13 values (- 30.5 to - 26.6 parts per thousand) and C/N atomic ratios (10.5 and 15.4) placed the organic material of the recent Bolatau-Feredeu sediment between the C3 Land Plants and the lacustrine algae. The n-alkane proxies provide better distinction between organic matter inputs. Detected major shifts in the n-alkane composition and the C and N concentrations along with the stable isotope compositions pointed towards three distinct stages in the environmental history of the lake-catchment system. The proxy information indicate a substantial landscape change characterized by deforestation and an increase in open pastureland with herbaceous vegetation from similar to 1820. The C/N, delta N-15, and delta C-13 values showed the highest variability probably linked to a variable lacustrine environment and decreased productivity in the catchment between similar to 1640 and 1760. It can be assumed that the extended periods of lake ice cover during the cold decades experienced at the turn of the 17th -18th centuries resulted in diminished biological productivity both in the lake and its catchment. Finally, afforestation and the decline in lake productivity have been reconstructed for the period of - 1470-1560.},
	keywords = {EAST-CENTRAL-EUROPE; N-ALKANES; Nitrogen; ENVIRONMENTAL HISTORY; record; lake sediment; DELTA-C-13; Eastern Carpathians; Lipid biomarkers; Geography, Physical; Lacustrine organic matter; LACUSTRINE SEDIMENTS; HOLOCENE CLIMATE; TATRA MOUNTAINS},
	year = {2018},
	eissn = {1873-4553},
	pages = {166-175},
	orcid-numbers = {Biró, Lóránt/0000-0002-1246-8773; Kern, Zoltán/0000-0003-4900-2587}
}

@CONFERENCE{MTMT:3315667,
	title = {Effect of CO2 on δ13C and δD isotope type-curves of oils and condensates during migration (NW Pannonian Basin, Hungary)},
	url = {https://m2.mtmt.hu/api/publication/3315667},
	author = {Sajgó, Csanád and Fekete, József},
	booktitle = {28th International Meeting on Organic Geochemistry},
	unique-id = {3315667},
	year = {2017}
}

@CONFERENCE{MTMT:3315666,
	title = {Cracking kinetics of pristane and phytane in a set of crude oils from the Pannonian Basin (Hungary)},
	url = {https://m2.mtmt.hu/api/publication/3315666},
	author = {Fekete, József and Sajgó, Csanád},
	booktitle = {28th International Meeting on Organic Geochemistry},
	unique-id = {3315666},
	year = {2017}
}