Abstract
Thermal water chemistry from the Biga Peninsula (NW Turkey) was investigated in order to discriminate among hydrochemical facies, and isotopic groups and identify the major geochemical processes. A systematic hydrogeochemical survey was carried out, incorporating new data as well as results from the previous studies. Results were used to further develop hydrogeological and geochemical models. Thermal water compositions were classified into four groups and the processes affecting evolution of water compositions were interpreted. Types 1, 2 and 3 are representatives of water corresponding to sulfate dominant fluids (mainly NaSO4-type), chloride dominant fluids (mainly NaCl-type), and bicarbonate dominant fluids (Na- or CaHCO3-type), respectively. Group 4 comprises the fluids with compositions that are not dominated by any distinctive anion. Groundwater infiltrates and circulates through the marbles of the Paleozoic basement. The isotopic composition of thermal waters revealed that deep infiltration of meteoric water took place in periods of changed climatic conditions.
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Acknowledgements
Sinan Sarp and Erkan Bozkurtoglu are specially thanked for their invaluable cooperation during sampling. The isotope lab at DSI is thanked for the O and H analyses of water, which was financed by ITU-MTA Economic and Environmental Geology of Biga Peninsula project. Warm thanks to Cenk Yaltirak for their thoughtful comments that helped me to improve this paper. I would also like to thank to George Luther and the anonymous reviewer for their constructive criticism and help.
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Yalcin, T. Geochemical characterization of the Biga Peninsula thermal waters (NW Turkey). Aquat Geochem 13, 75–93 (2007). https://doi.org/10.1007/s10498-006-9008-2
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DOI: https://doi.org/10.1007/s10498-006-9008-2