Search Results - "Polgári, Márta"

Comparative Study of Formation Conditions of Fe-Mn Ore Microbialites Based on Mineral Assemblages: A Critical Self-Overview by Márta Polgári, Ildikó Gyollai

“…The role of biogenicity in the mineral world is larger than many might assume. Biological processes and physical and chemical processes interact both at the…”
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Correlated chemostratigraphy of Mn-carbonate microbialites (Úrkút, Hungary) by Polgári, Márta, Németh, Tibor, Pál-Molnár, Elemér, Futó, István, Vigh, Tamás, Mojzsis, Stephen J.

“…The genesis of a suite of Jurassic (Lias) microbialites at the Úrkút black shale-hosted manganese carbonate ore body (central Hungary) is described by a…”
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Comparison of research methods and interpretation of ALH-84001 (McKay et al. 1996, Science and studies based on Science publication by Thomas-Keprta et al. 2000 GCA, Thomas-Keprta et al. 2001 PNAS) and ALH-77005 (Gyollai et al. 2019 Open Astronomy) by Gyollai, Ildikó, Bérczi, Szaniszló, Polgári, Márta

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Celadonite and smectite formation in the Úrkút Mn-carbonate ore deposit (Hungary) by Polgári, Márta, Hein, J.R., Németh, T., Pál-Molnár, E., Vigh, T.

“…Synsedimentary and early diagenetic oxygen levels are estimated by evaluating celadonite–smectite formation in Jurassic marine black shale-hosted manganese…”
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Terrestrial radioisotopes as paleoenvironmental proxies in sedimentary formations by Bíró, Lóránt, Polgári, Márta, M. Tóth, Tivadar, Vigh, Tamás, Kávási, Norbert, Sahoo, Sarata Kumar

“…The presence of anomalous terrestrial radioisotopes must be suspected in black shale-hosted manganese ore deposits, based on high organic matter content, which…”
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Microbial metallogenesis of Cryogenian manganese ore deposits in South China by Yu, Wenchao, Polgári, Márta, Gyollai, Ildikó, Fintor, Krisztián, Szabó, Máté, Kovács, Ivett, Fekete, József, Du, Yuansheng, Zhou, Qi

“…•Sturtian-Marinoan interglacial Datangpo Formation (Guizhou, South China) was studied.•Detailed petrographic, mineralogical and geochemical analyses were done…”
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Microbially Mediated Ore-Forming Processes and Cell Mineralization by Polgári, Márta, Gyollai, Ildikó, Fintor, Krisztián, Horváth, Henrietta, Pál-Molnár, Elemér, Biondi, João Carlos

“…Sedimentary black shale-hosted manganese carbonate and oxide ores were studied by high-resolution detailed optical and cathodoluminescence microscopy, Raman…”
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Biogenesis of the Neoproterozoic kremydilite manganese ores from Urucum (Brazil) – A new manganese ore type by Biondi, Joăo Carlos, Polgári, Márta, Gyollai, Ildikó, Fintor, Krisztián, Kovács, Ivett, Fekete, József, Mojzsis, Stephen J.

“…[Display omitted] •Urucum Mn deposit formed in an Ediacaran marginal basin with more than 600 Mt of ore formed from manganiferous microbialite.•Kremydilite is…”
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Microbially-induced K enrichments in hydrothermally altered andesitic tuffs by Polgári, Márta, Nagy, Béla, Fintor, Krisztián, Gyollai, Ildikó, Kovács, Ivett, Szabó, Máté, Mojzsis, Stephen

“…[Display omitted] •Anomalous K enrichment in Neogene andesitic tuffs are biologically mediated.•Three generations of K-feldspars are distinguished.•Bioforms in…”
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Microbial contribution to the formation of the Carboniferous sedimentary manganese deposits in northwestern China by Dong, Zhi-Guo, Zhang, Bang-Lu, Gyollai, Ildikó, Fintor, Krisztián, Szabó, Máté, Kovács, Ivett, Gao, Jun, Zhang, Lian-Chang, Polgári, Márta, Wang, Chang-Le

“…[Display omitted] •Cyclicicites of biogenic minerals were identified by Raman spectroscopy.•Primary accumulation and diagenetic transformation of Mn were…”
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Characterization and 10 Be content of iron carbonate concretions for genetic aspects - Weathering, desert varnish or burning: Rim effects in iron carbonate concretions by Polgári, Márta, Bérczi, Szaniszló, Horiuchi, Kazuho, Matsuzaki, Hiroyuki, Kovács, Tibor, Józsa, Sándor, Bendő, Zsolt, Fintor, Krisztián, Fekete, József, Homonnay, Zoltán, Kuzmann, Ernő, Gucsik, Arnold, Gyollai, Ildikó, Kovács, János, Dódony, István

“…The research investigated three iron carbonate (siderite) sedimentary concretions from Nagykovácsi, Úri and Délegyháza, Hungary. To identify possible source…”
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Characterization and 10Be content of iron carbonate concretions for genetic aspects – Weathering, desert varnish or burning: Rim effects in iron carbonate concretions by Polgári, Márta, Bérczi, Szaniszló, Horiuchi, Kazuho, Matsuzaki, Hiroyuki, Kovács, Tibor, Józsa, Sándor, Bendő, Zsolt, Fintor, Krisztián, Fekete, József, Homonnay, Zoltán, Kuzmann, Ernő, Gucsik, Arnold, Gyollai, Ildikó, Kovács, János, Dódony, István

“…The research investigated three iron carbonate (siderite) sedimentary concretions from Nagykovácsi, Úri and Délegyháza, Hungary. To identify possible source…”
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Bacteria-Driven Fossil Ecosystems as Paleoindicators of Active Continental Margins and the Role of Carbonate Sediment-Hosted Vents in Geodynamic Reconstructions by László Bujtor, Ildikó Gyollai, Máté Szabó, Ivett Kovács, Márta Polgári

“…Continental rifting of the Tisza microplate started during the Late Jurassic and resulted in phreatic eruptions, peperite, and the construction of a volcanic…”
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Mineral and chemostratigraphy of a Toarcian black shale hosting Mn-carbonate microbialites (Úrkút, Hungary) by Polgári, Márta, Hein, James R., Bíró, Lóránt, Gyollai, Ildikó, Németh, Tibor, Sajgó, Csanád, Fekete, József, Schwark, Lorenz, Pál-Molnár, Elemér, Hámor-Vidó, Mária, Vigh, Tamás

“…Toarcian black shale that hosts Mn-carbonate microbialites at Úrkút, Hungary was investigated by mineralogical, inorganic, and organic geochemical methods for…”
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Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? by Gyollai, Ildikó, Polgári, Márta, Bérczi, Szaniszló, Gucsik, Arnold, Pál-Molnár, Elemér

“…The ALH-77005 Martian meteorite was found in Allan Hills on Antarctica during the Japanese National Institute of Polar Research (1977-1978) mission. One thin…”
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Microbial mediation of textures and minerals – terrestrial or parent body processes? by Polgári, Márta, Gyollai, Ildikó, Bérczi, Szaniszló, Veres, Miklós, Gucsik, Arnold, Elemér, Pál-Molnár

“…Evolution of chondritic parent body is influenced by thermal, impact metamorphism and aqueous alteration, studied in Mező-Madaras, Knyahinya, Mócs and…”
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Refinement of genetic and structural models of the Úrkút manganese ore deposit (W-Hungary, Europe) using statistical evaluation of archive data by Bíró Lóránt, Polgári Márta, Tóth Tivadar, Vigh Tamás

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Terrestrial radioisotopes in black shale hosted Mn-carbonate deposit (Úrkút, Hungary) by Vigh, Tamás, Kovács, Tibor, Somlai, János, Kávási, Norbert, Polgári, Márta, Bíró, Lóránt

“…Previously, little attention has been paid to terrestrial radioisotopes (U, Th, 40 K) occurring in manganese ores, despite the fact that the biogeochemical…”
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A porous silica rock (“tripoli”) in the footwall of the Jurassic Úrkút manganese deposit, Hungary: Composition, and origin through carbonate dissolution by Polgári, Márta, Szabó, Zoltán, Szabó-Drubina, Magda, Hein, James R., Yeh, Hsueh-Wen

“…The mineralogical, chemical, and isotopic compositions were determined for a white tripoli from the footwall of the Jurassic Úrkút Mn-oxide ore deposit in the…”
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Stable Isotope Evidence for the Origin of the Urkut Manganese Ore Deposit, Hungary by Marta Polgari, Patrick M. Okita

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