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Fluid and heat discharge rates of thermal springs of El Chichón volcano were measured using the chloride inventory method. Four of the five known groups of hot springs discharge near-neutral Na–Ca–Cl–SO 4 waters with a similar composition (Cl∼1500–2000mgkg −1 and Cl/SO 4 ∼3) and temperatures in the 50–74°C range. The other group discharges acidic (pH 2.2–2.7) Na–Cl water of...
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