Terrestrial radioisotopes in black shale hosted Mn-carbonate deposit (Úrkút, Hungary)

Tamás Vigh, Tibor Kovács, János Somlai, Norbert Kávási, Márta Polgári, Lóránt Bíró

Research output: Contribution to journalArticle

2 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)831-847
Number of pages17
JournalActa Geophysica
Issue number4
Publication statusPublished - Aug 1 2013



  • black shale
  • manganese
  • radioactivity
  • trace elements
  • uranium

ASJC Scopus subject areas

  • Geophysics

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