In this study, behavior
and migration processes of rare earth elements (REEs) were determined in the
thermal and cold waters of the geothermal fields in the Eastern Black Sea
Region.The temperatures of the geothermal waters are between the range of 38
and 60 °C. The water types are Na-Ca-SO4 for Sarmaşık (Ordu) field, Na-Ca-HCO3 for
Ikizdere (Rize) field, Na-Ca-CO3-SO4, for Ayder (Rize) field and Na-HCO3-Cl for
Savsat (Artvin) field. All geothermal fields are in alkaline geothermal
character (pH: 7-9.3) and have very low REE + Y concentrations, slightly
significant Ce contens and significantly positive Eu anomalies (except for Ayder
geothermal field). REE+Y content, fractionation and positive Eu anomalies of the
investigated water are controlled by water/rock ratio, pH and minerals in the host
rocks. According to the thermodynamic calculations, it was determined that the
mobility of the REEs in geothermal fields were mainly controlled by Ln3+, LnOH2+,
LnCl2+, Ln(SO ) -, LnSO +, LnHCO 2+, Ln(CO ) - and LnCO + complexes.
This study has been carried out within the framework of the TÜBİTAK project number 115Y142.
Primary Language | English |
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Subjects | Engineering |
Journal Section | Articles |
Authors | |
Publication Date | December 27, 2019 |
Published in Issue | Year 2019 Volume: 160 Issue: 160 |
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