A5066667752- Geochemistry and Elemental Analysis
- Paleontology and Stratigraphy of Fossils
- Geological and Geochemical Analysis
- Radioactive element chemistry and processing
- Geomagnetism and Paleomagnetism Studies
- Planetary Science and Exploration
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Astro and Planetary Science
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Space Exploration and Technology
- Heavy metals in environment
- Spaceflight effects on biology
- Geological Formations and Processes Exploration
- Diamond and Carbon-based Materials Research
- Space Science and Extraterrestrial Life
- Paleontology and Evolutionary Biology
- Mining Techniques and Economics
- Ancient and Medieval Archaeology Studies
- Research, Science, and Academia
- Cultural Heritage Materials Analysis
- Metallurgy and Cultural Artifacts
- Metal Extraction and Bioleaching
- CCD and CMOS Imaging Sensors
Institute for Geological and Geochemical Research
2014-2024
Eszterhazy Karoly Catholic University
2014-2024
Research Centre for Astronomy and Earth Sciences
2019-2024
Konkoly Observatory
2022-2023
Hungarian Research Network
2021
Hungarian Academy of Sciences
2008-2020
University of Szeged
2009-2011
Eötvös Loránd University
2009
Institute for Solid State Physics and Optics
2009
TU Bergakademie Freiberg
2009
Research Article| October 01, 2012 Microbial action formed Jurassic Mn-carbonate ore deposit in only a few hundred years (Úrkút, Hungary) Márta Polgári; Polgári * 1Institute for Geochemical Research, Hungarian Academy of Sciences, Budaörsi str. 45, 1112 Budapest, Hungary *E-mails : rodokrozit@gmail.com; jhein@usgs.gov. Search other works by this author on: GSW Google Scholar J.R. Hein; Hein 2U.S. Geological Survey, 400 Natural Bridges Drive, Santa Cruz, California 95060, USA A.L. Tóth; Tóth...
Sedimentary black shale-hosted manganese carbonate and oxide ores were studied by high-resolution in situ detailed optical cathodoluminescence microscopy, Raman spectroscopy, FTIR spectroscopy to determine microbial contribution metallogenesis. This study of the Urucum Mn deposit Brazil is included as a case for microbially mediated ore-forming processes. The results compared interpreted comparative way, data elaborated complex, structural hierarchical method. first syngenetic products...
The role of biogenicity in the mineral world is larger than many might assume. Biological processes interact with physical and chemical at Earth's surface far below underground, leading to formation, for instance, banded iron formations manganese deposits. Microbial mats can form giant sedimentary ore deposits, which also include enrichment further elements. Microorganisms play a basic catalyzing geochemical Earth control, regularization cycles other biosignatures be used as indicators...
Manganese deposits in the Early Carboniferous Baping Formation of central Guangxi, South China were formed Youjiang Basin on southern passive margin Block. Hosted Second Member Formation, manganese ore layers interbedded by thin-middle carbonate and silicified carbonate. Previous studies provide limited information about this deposit, sedimentary characteristics ores metallogenic mechanism are not clear. In study, integrated analyses petrology, mineralogy, geochemistry, carbon isotope reveal...
The role of biogenicity in the mineral world is larger than many might assume. Biological processes and physical chemical interact both at Earth’s surface far underground, leading to formation banded iron manganese deposits, among others. Microbial mats can form giant sedimentary ore which include enrichment further elements. This article reviews ways microbially-mediated contribute mineralization, importance mineralized microbial textural features, methods that must be used obtain...
The mineralogical, petrological, geochemical and textural characterization of the Triassic Bódvaszilas Sandstone in Rudabánya open pit Aggtelek Mts. is summarized based on our investigations. pore-filling carbonate cement Lower Formation a proximal basin series (Rudabánya) was formed as result syngenetic early diagenetic two step microbially mediated Fe mineralization (Fe-oxide formation by chemo-lithoautotrophic Fe-oxidizing microbes (FeOB) suboxic neutrophylic environment, Fe-carbonate...
Economically important manganese deposits are hosted in the Middle Permian Maokou Formation of Zunyi, northern Guizhou, South China. During Permian, intense rifting related to initial stage Emeishan Large Igneous Province (ELIP) led development carbonate platforms and inter-platform troughs. The occur transitional zone between Previous studies emphasized that hydrothermal activities at bottom trough basin controlled formation deposits. In this study, new sedimentary, mineralogical, stable...
Continental rifting of the Tisza microplate started during Late Jurassic and resulted in phreatic eruptions, peperite, construction a volcanic edifice Early Cretaceous Mecsek Mountains (South Hungary). In SE direction from at Zengővárkony, shallow marine (depth 100–200 m) carbonate sediment hosted vent environment, iron ore deposition occurred end Valanginian to early Hauterivian, hosting diverse, endemic fauna approximately 60 species. The detailed mineralogical analysis transport conduits...
Fossil manganese nodules and encrustations from ‘seamount’ ‘basin’ localities in the Transdanubian Central Mountains of Hungary are lithologically, mineralogically chemically similar to some modern marine ferromanganese oxide deposits, show no evidence postdepositional changes other than cementation. Five groups deposits were encountered: Fe/Mn nodules, encrusted shells, pavements, stains, Fe intraclasts, first three which specific 'seamount' environment last ‘basins’. Optical electron...
Abstract Although the Úrkút manganese ore deposit in western placecountry-regionHungary has been exploited for at least 90 years, there are still numerous open questions concerning genetics as well structure and geometry of body. A large set available archive data have reviewed evaluated order to solve some most crucial problems. For processing, besides diverse GIS approaches, univariate multivariate statistical methods were used on created unified database. The main aims mathematical...
Abstract Kutnohorite with moderate and bright orange-red cathodoluminescence (CL) was studied by CL microscopy spectroscopy. This mineral found in fossiliferous concretions composed mainly of rhodochrosite from the Mn-carbonate mineralization at Úrkút, Hungary. The reveals that kutnohorite occurs as impregnations, layers veinlets. X-ray diffraction, infrared spectroscopy electron microprobe studies indicate luminescent has excess Ca (72.9–80.0 mol.% CaCO3, 16.3–20.5 MnCO3, 3.3–5.6 MgCO3...
Strongly deformed phosphorite layers enriched with U-Be-Mn-REE occur in a weathered Triassic metarhyolite tuff near the town of Bükkszentkereszt, NE Hungary. The is massive or earthy, has an especially fine-grained texture, and forms inhomogeneous bands different Mn-oxide contents. High-resolution optical rock microscopy investigations helped to distinguish mineralized biosignatures, filamentous, vermiform structures, coccoid-like aggregates. These microstructures encompass almost whole...
The catchment (bedrock and soil) sediments of lake Bolătău, Romania were studied by high resolution multi-methodological investigations to characterize paleoenvironmental formation conditions. Particle size analyses, optical cathodoluminescence microscopy, FTIR-ATR Raman spectroscopy, X-ray powder diffraction, XRF applied for microtextural, chemical, micro-mineralogical embedded organic material characterization distribution the sediments, especially concerning geochemical conditions, like...
Neoproterozoic banded iron formations (BIF) and ironstones occur in the Urucum mining district (Pantanal, Brazil). Microbially mediated formation as microbialites has been proposed for these deposits. This study aims to provide a high resolution characterization of micro-textural features, mineral assemblage distribution gather evidence two microbial ore forming systems: Fe- Mn-oxidizing metabolic processes cyanobacterial activity Optical- cathodoluminescence rock microscopy, Fourier...