Fig. 3: The chemical compositions of thermal waters.
From: Global thermal spring distribution and relationship to endogenous and exogenous factors
Chemical compositions of thermal waters in relation to their temperature (pseudo-color scale) and their distance from the nearest coastline (size of the circles). a Relationship between Cl− and Na + (in meq/L), showing that samples range from a water-rock interaction (W-R) domain to seawater (SW) domain. b The SO42− and Ca2+ relationship shows the possible interaction of thermal waters with anhydrite and seawater. c The Gibbs diagram shows which are the foremost vital processes (precipitation, water-rock interaction, evaporation) controlling the chemistry of these thermal waters. d The ternary Cl−-SO42−-HCO3− ternary plot (Giggenbach, 1991) shows the different types of thermal waters.
