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图1 Location of geothermal groundwater samples and the hydrogeological map of Wugongshan area. Red square represents the study area. Red circles represent the sample site of geothermal groundwater samples collected from the Wugongshan area.
图2 Hydrochemical type Piper ternary diagram of geothermal groundwater in different clusters.
图3 Isotope composition of geothermal groundwater.
图4 The component planes showing weight vector values of 11 variables. The neurons in each component plane are represented by color codes, blue and yellow corresponding to the low and high values of the parameters, respectively. b The pattern of cluster formation of geothermal groundwater in the Wugongshan area. The red solid lines represent the clustering boundaries.
图5 The Gibbs diagrams of geothermal groundwater samples collected from the Wugongshan area.The purple, green, yellow and blue circles represent the samples of Cluster I, Cluster II, Cluster III andCluster IV, respectively. The red arrow represents the trend of cation exchange.
图6 Relationships between hydrochemical components in geothermal groundwater of the Wugongshan area. (a) Na+ vs Cl−, (b) Na+ vs F−, (c) CAI 1 vs CAI 2, and (d) (Ca2+ + Mg2+)-(SO42−+ HCO3−) vs (Na++ K+–Cl−).
