Geochemical characterization of the Biga Peninsula thermal waters (NW Turkey) |
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Authors: | Tolga Yalcin |
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Institution: | (1) Faculty of Mines, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey |
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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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Keywords: | Thermal water Hydrogeochemical survey Geochemical process Biga Peninsula NW Turkey Isotope |
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