Fig. 9From: Response of a hydrothermal system to escalating phreatic unrest: the case of Turrialba and Irazú in Costa Rica (2007–2012)Anion mixing plots for the thermal spring waters and Irazú–Turrialba lake waters. a Dotted lines illustrate the possible trends corresponding to dilution with meteoric waters (except for Santa Teresita). b Line represent the SO4/Ca ratio of anhydriteBack to article page