AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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Autori: BOGLÁRKA-MERCEDESZ KIS, CĂLIN BACIU, LADISLAU KÉKEDY-NAGY.
In Romania important resources of sparkling mineral waters are related to the Neogene magmatic activity in the Eastern Carpathians. These mineral water springs are located on the eastern and western slopes of the Neogene to Quaternary volcanic chain. Based on a survey carried out in the Rodna-Bârgăului, Călimani-Gurghiu-Harghita Mountains, and on the Transylvanian Basin boundary, we have investigated 63 CO2-rich mineral water springs, including four physical (T, pH, redox potential, electrical conductivity) and 15 chemical parameters (CO2 , HCO3-, Cl-, SO42-, Li , Rb , Na , K , Ca2 and Mg2 , Fe3 , Zn2 , Cd2 , Pb2 , Cu2 content) were determined. The mineral waters are of Ca-Mg-HCO3 and Na-K-HCO3 type, used both for drinking purposes and for local spas. We have analysed the chemical composition of the mineral water springs from a statistical point of view. Using the cluster analysis the waters were separated into several groups, according to similarities in their chemical composition. These groups confirm the mixing trend of the mineral water types demonstrated also by geochemical tools. As a result of their geographical position, being at the boundary of two major geological units, the Transylvanian Basin and the Eastern Carpathians, the chemistry of mineral waters is highly influenced both by volcaniclastic and sedimentary rocks.
Key words: Eastern Carpathians, Transylvanian Basin, mineral waters, statistics
