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Galeras fumarole discharges have been collected since its reactivation, in 1988, through December 1995. The gases are dominated by H 2 O, CO 2 , S (as SO 2 and H 2 S) and HCl. The relative proportions of these gases classify them as ‘magmatic’. Thermodynamic equilibrium temperatures of the gases range from 260 to > 600 °C. The relative abundance of inert gases, N...
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