Abstract
This study investigates the chemical and isotopic characteristics of low to medium temperature groundwater hosted by the Heyuan deep fault zones and the Zijin-Boluo large fault zones in Dongguan and its adjacent regions. Four thermal springs are of the Na-HCO3 type and contain minor elements (Si, Sr, F, Li, Cs), while other water samples (including eleven well samples and five cold springs with temperatures ranging from 22.2°C to 28.4°C, named cold groundwater) have more complex hydrochemical characteristics. The results show that all water samples are of meteoric origin. Most water samples can be grouped into two groups in a plot of oxygen and hydrogen isotope data.Thermal water, all cold springs, and part of the well water samples fall into the same group. A simple binary mixing model based on oxygen and hydrogen isotopes was used to calculate the mixing ratio of groundwater with thermal water.
Published Version
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