Hydrogeochemical Characteristics and Formation of Low-Temperature Geothermal Waters in Mangbang-Longling Area of Western Yunnan, China

Figure 7

Cross-plot of log (K²/Mg) vs. log (SiO₂), unit: mg/L [42]. The lines are drawn using log (SiO₂) = 4.52 − (731/(t°C + 273.15)) for amorphous silica, log (SiO₂) = 4.69 − (1032/(t°C + 273.15)) for chalcedony, and log (SiO₂) = 5.19 − (1309/(t°C + 273.15)) for quartz from [43] and log (K²/Mg) = 14 − (4410/(t°C + 273.15)) from [44].