Yuce Galip, Italiano Francesco, Yasin Didem, Taskiran Lutfi, Gulbay Ahmet Hilmi
a Department of Geological Engineering , Hacettepe University , Ankara , Turkey.
b Istituto Nazionale di Geofisica e Vulcanologia , Sezione di Palermo , Italy.
Isotopes Environ Health Stud. 2017 May;53(2):198-211. doi: 10.1080/10256016.2016.1206096. Epub 2016 Jul 13.
The thermal fluids vented over Eskisehir province have been investigated for their origin and to estimate the geothermal potential of the area. Thermal waters as well as bubbling and dissolved gases were collected and analysed for their chemical and isotopic features. Their isotopic composition varies in the range from -11.5 to -7.7 ‰ for δO, -84 and -57 ‰ for δH, and 0-7.2 TU for tritium. The gases (bubbling and dissolved) are mostly N-dominated with a significant amount of CO. The helium isotopic ratios are in the range of 0.2-0.66 R/Rac, indicate remarkable mantle-He contribution ranging between 2 and 10 % in the whole study area. Considering the estimated geothermal gradient about three times higher than the normal gradient, and the reservoir temperatures estimated to be between 50 and 100 °C using quartz and chalcedony geothermometers, a circulation model was built where possible mixing with shallow waters cool down the uprising geothermal fluids.
对埃斯基谢希尔省排放的热流体进行了研究，以确定其来源并估算该地区的地热潜力。收集了热水以及冒泡气体和溶解气体，并对其化学和同位素特征进行了分析。其同位素组成范围为：δO为-11.5至-7.7‰，δH为-84至-57‰，氚为0至7.2 TU。这些气体（冒泡气体和溶解气体）大多以氮气为主，含有大量一氧化碳。氦同位素比值在0.2至0.66 R/Rac范围内，表明在整个研究区域，地幔氦的贡献显著，介于2%至10%之间。考虑到估计的地热梯度比正常梯度高约三倍，以及使用石英和玉髓地热温度计估计储层温度在50至100°C之间，构建了一个循环模型，其中浅层水的可能混合会使上升的地热流体冷却。
