Interaction and variation of isotopic age, temperature, organic and inorganic solutes in Hungarian thermal waters

József Fekete, Csanád Sajgó, István Horváth, Zoltán Kárpáti, István Vetõ, Magdolna Hetényi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The geochemical facies of Hungarian thermal waters were the object of this study. Samples were separated into groups by relative ages (δ 18O values). Mature and immature subgroups were formed on the basis of dissolved (semi)volatile organic compounds. The oldest (connate) waters form one group with a small number of samples. The subgroups containing different small molecular-sized soluble aromatics differ sharply in their chemical features (sodium, hydrogen carbonate, iodine, ammonium etc. content). The origin of the organic matter may differ in the subgroups as inferred by their different δ18O values and ten times greater halogen contents.Our results show that the decomposition of organic matter produces small molecular-sized aromatic compounds and also influences the amounts of inorganic components in thermal waters, through the increase of feldspar hydrolysis and carbonate dissolution.

Original languageEnglish
Pages (from-to)269-285
Number of pages17
JournalCentral European Geology
Volume52
Issue number3
DOIs
Publication statusPublished - Sep 1 2009

Keywords

  • aromatic compounds
  • hydrogeochemistry
  • organic matter
  • thermal waters
  • δO

ASJC Scopus subject areas

  • Geology

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