Assessment of Chaves Low-Temperature CO₂-Rich Geothermal System (N-Portugal) Using an Interdisciplinary Geosciences Approach

Figure 4

Piper diagram for the () Chaves low-temperature CO₂-rich geothermal waters and the () Vilarelho da Raia, () Vidago, and (■) Pedras Salgadas cold CO₂-rich mineral waters. For comparison, the () local shallow cold dilute normal groundwaters of the region were also plotted. Taken from [30].