Akademik Veri Yönetim Sistemi
Journal of the Faculty of Engineering and Architecture of Gazi University, cilt.38, sa.3, ss.1361-1373, 2023 (SCI-Expanded, Scopus, TRDizin)
The tectonically active graben regions of Western Anatolia are characterized by many geothermal activities and high boron enrichment in thermal waters. The widespread use of boron isotope geochemistry in geological studies to identify different sources of origin is quite new. In order to determine the origin of boron in thermal waters, the B isotope ratios of the sampled thermal waters, the results of the chemical analysis of the waters and the geology of the regions were evaluated together. It was determined that the thermal waters examined were generally Na-HCO3, Ca-Na- HCO3, Ca- HCO3-Cl and Na-Cl types. In regions with high temperature and low dilution with cold waters, B concentrations are quite high (B=52.1mg/l; Salihli), and B isotope ratios are in a wide range due to lithological differences (δ11B=-7.73 / +10.83 ; n=15). A positive correlation was found between temperature and dissolved ions and similarly between B - Cl and B - electrical conductivity in all waters. In addition, the fact that the B isotope ratios in the thermal waters are compatible with the B isotope ratios of the rocks with which the waters interact supports the waterrock interaction regarding the origin of boron. The high positive δ11B values of Na-Cl type thermal waters are the result of marine water mixing, as supported by other chemical data.