CJEES

Home
Peer Review
Editorial Board
Instructions
Online First
Latest Issue
Past Issues
Contact
Impact Factor
Reject Rate

 
You are here: Home » Latest Issue » Volume 13, 2018 - Number 2 » FOSSILIZED BIOMATS AS THE POSSIBLE SOURCE OF HIGH NATURAL RADIONUCLIDE CONTENT AT THE JURASSIC ÚRKÚT MANGANESE ORE DEPOSIT, HUNGARY, Carpathian Journal of Earth and Environmental Sciences, August 2018, Vol. 13, No. 2, p. 477 - 487; DOI:10.26471/cjees/2018/013/041


« Back

Ildikó GYOLLAI1, Márta POLGÁRI1,2*, Lóránt BÍRÓ1, Tamás VIGH3, Tibor KOVÁCS4 & Elemér PÁL-MOLNÁR5
1Research Centre for Astronomy and Geosciences, Geobiomineralization and Astrobiological Research Group, Institute for Geological and Geochemical Research, Hungarian Academy of Sciences, 1112 Budapest, Budaörsi str. 45, Hungary, e-mail: rodokrozit@gmail.com, gyildi@gmail.com
2Eszterházy Károly University, Department of Natural Geography and Geoinformatics, 3300 Eger, Leányka str. 6/C, Hungary
3Mangán Ltd, Úrkút, Külterület 1. 8409 Hungary, e-mail: drvightamas@gmail.com
4Institute of Radiochemistry and Radioecology, University of Pannonia, Egyetem str. 10, Veszprém, H-8200, Hungary, Phone: +36 88 624-789, Fax: +36 88 624-178, e-mail: kt@almos.uni-pannon.hu
5Szeged University, Department of Mineralogy, Geochemistry and Petrology ‘Vulcano’ Petrology and Geochemistry Research Group, 6722 Szeged, Egyetem str. 2, Hungary, e-mail: palm@geo.u-szeged.hu, *corresponding author


FOSSILIZED BIOMATS AS THE POSSIBLE SOURCE OF HIGH NATURAL RADIONUCLIDE CONTENT AT THE JURASSIC ÚRKÚT MANGANESE ORE DEPOSIT, HUNGARY, Carpathian Journal of Earth and Environmental Sciences, August 2018, Vol. 13, No. 2, p. 477 - 487; DOI:10.26471/cjees/2018/013/041

Full text

Abstract:

The 220Rn and 222Rn concentration in the Úrkút Manganese Formation is anomalously high, and it causes health risk for the attendants of the Úrkút Manganese Mine. In this study we suggest a new model for the high ratio of different natural radionuclides by the new genetic model of the Úrkút Manganese Formation. Fossilized Fe-rich biomats were found in the whole section of the deposit. Based on these, the formation of different types of Mn-ores by one or two step microbial mediation can be assumed. The biomats represent large amounts of organic matter offering large surfaces with negative ligands, as well as poorly ordered mineral phases like ferrihydrite and clay minerals with large and reactive surfaces. These features offer high capability of cation binding, among them ions of radioactive elements, which could be fixed on the active or inactive organic matter, as well as on mineral surfaces. The decay of fixed nuclides could result high 220Rn and 222Rn concentration in the Úrkút Mine.



Keyword: biomats, black shale, geomicrobiology, radon, natural radionuclide


(c) 2006 - 2018 , Earth and Environmental Team
Design by Adrian Dorin