Abstract
AbstractSecondary continental carbonate accumulations are quite frequent deposits in Hungary, indicating strong hydrothermal activity during the Pliocene and Quaternary. They form from CaCO3-rich waters either at ambient or at higher temperatures due to CO2 degassing and/or biological activity. Pliocene-Pleistocene travertines formed from hydrothermal fluids are characteristic for the area of the Gerecse and Buda Mts, while recent travertine accumulations form mostly at thermal wells as scalings. Freshwater tufa carbonates in Hungary are connected to karstic springs of the the Bükk Mts, Aggtelek Mts, Mecsek Mts, Bakony Mts, Balatonfelvidék. Sedimentology, geochemistry and dating of travertine and tufa can provide important information about palaeoclimatic, tectonic and palaeoenvironmental conditions and their petrophysical and microfacies study can contribute to the understanding of microbialite oil reservoir rocks. Furthermore, the recent deposits can be used for the calibration of the oxygen- and clumped isotope paleothermometers. The aim of this chapter is to provide a short review of the most important Hungarian travertine and tufa deposits including the achievements of most recent researches focusing on their age, depositional environment and geochemistry.KeywordsTravertineTufaDepositional environmentIsotope geochemistryU–Th dating
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