@article{MTMT:2346494,
	title = {Celadonite and smectite formation in the Úrkút Mn-carbonate ore deposit (Hungary)},
	url = {https://m2.mtmt.hu/api/publication/2346494},
	author = {Polgári, Márta Piroska and Hein, JR and Németh, Tibor and Pál-Molnár, Elemér and Vigh, Tamás},
	doi = {10.1016/j.sedgeo.2013.05.017},
	journal-iso = {SEDIMENT GEOL},
	journal = {SEDIMENTARY GEOLOGY},
	volume = {294},
	unique-id = {2346494},
	issn = {0037-0738},
	year = {2013},
	eissn = {1879-0968},
	pages = {157-163},
	orcid-numbers = {Németh, Tibor/0000-0002-1836-6006; Pál-Molnár, Elemér/0000-0002-9606-0133}
}

@article{MTMT:2337694,
	title = {Terrestrial radioisotopes in black shale hosted Mn-carbonate deposit (Úrkút, Hungary)},
	url = {https://m2.mtmt.hu/api/publication/2337694},
	author = {Vigh, Tamás and Kovács, Tibor and Somlai, János and Kávási, Norbert and Polgári, Márta Piroska and Biró, Lóránt},
	doi = {10.2478/s11600-013-0124-2},
	journal-iso = {ACTA GEOPHYS},
	journal = {ACTA GEOPHYSICA},
	volume = {61},
	unique-id = {2337694},
	issn = {1895-6572},
	abstract = {Previously, little attention has been paid to terrestrial radioisotopes (U, Th, 40K) occurring in manganese ores, despite the fact that the biogeochemical relationship between Mn and U is versatile. Occurrence of terrestrial radioisotopes in great amounts during mining on a long-term causes significant radiation exposure. It is important to inspect black shale-hosted manganese ores from this aspect, as black shales are typically potential U-rich formations. Despite the increased radon concentration in the mine, based on the detailed major elements, trace elements and gamma spectroscopy inspection of the rock types of deposit, the U, Th enrichment was undetectable. However, the U and Th content of about average terrestrial abundance of the great ore amount may be in the background of the increased radon concentration level. This Mn-carbonate ore deposit in spite of the low U content exhibit potential radon danger for miners, which can be eliminated with intensive air change only. © 2013 Versita Warsaw and Springer-Verlag Wien.},
	keywords = {Manganese; Trace Elements; Uranium; Radioactivity; black shale},
	year = {2013},
	eissn = {1895-7455},
	pages = {831-847},
	orcid-numbers = {Kovács, Tibor/0000-0003-2606-0397; Somlai, János/0000-0002-5026-7948; Biró, Lóránt/0000-0002-1246-8773}
}

@article{MTMT:2034050,
	title = {Microbial action formed Jurassic Mn-carbonate ore deposit in only a few hundred years (Úrkút, Hungary)},
	url = {https://m2.mtmt.hu/api/publication/2034050},
	author = {Polgári, Márta Piroska and Hein, J R and Tóth, Attila Lajos and Pál-Molnár, Elemér and Vigh, Tamás and Biró, Lóránt and Fintor, Krisztián},
	doi = {10.1130/G33304.1},
	journal-iso = {GEOLOGY},
	journal = {GEOLOGY},
	volume = {40},
	unique-id = {2034050},
	issn = {0091-7613},
	abstract = {The Úrkút (Hungary) manganese (Mn) ore, hosted by Jurassic black shale, was studied using high-resolution mineralogical, microtextural, and chemical methods. Two independent superimposed biostructures were identified consisting of rhythmic laminations that provide important proxies for paleoenvironments and duration of ore formation. Millimeter-scale laminae reflect a depositional series of Fe-rich biomats, mineralized microbially produced sedimentary structures. These biomats formed at the sediment-water interface under dysoxic and neutral pH conditions by enzymatic Fe2+ oxidizing processes that may have developed on a daily to weekly growth cycle. The early diagenetic sedimentary ore is composed of Ca rhodochrosite, celadonite, and smectite, and also shows a 100-µm-scale element oscillation that produces Mn(Ca)-rich and Si(Fe clay)-rich microlaminae. This microlamination may reflect a 10 h to daily rhythmicity produced by the growth of microbial communities. If true, then the giant Úrkút ore deposit may have formed over hundreds of years, rather than hundreds of thousands of years as previously thought.},
	year = {2012},
	eissn = {1943-2682},
	pages = {903-906},
	orcid-numbers = {Pál-Molnár, Elemér/0000-0002-9606-0133; Biró, Lóránt/0000-0002-1246-8773; Fintor, Krisztián/0000-0003-4794-9419}
}

@article{MTMT:1865071,
	title = {Microbial processes and the origin of the Úrkút manganese deposit, Hungary},
	url = {https://m2.mtmt.hu/api/publication/1865071},
	author = {Polgári, Márta Piroska and Hein, JR and Vigh, Tamás and Szabó-Drubina, M and Fórizs, István and Biró, Lóránt and Müller, A and Tóth, Attila Lajos},
	doi = {10.1016/j.oregeorev.2011.10.001},
	journal-iso = {ORE GEOL REV},
	journal = {ORE GEOLOGY REVIEWS},
	volume = {47},
	unique-id = {1865071},
	issn = {0169-1368},
	year = {2012},
	eissn = {1872-7360},
	pages = {87-109},
	orcid-numbers = {Fórizs, István/0000-0003-0813-6079; Biró, Lóránt/0000-0002-1246-8773}
}