Chemical and isotopic compositions of thermal springs, fumaroles and bubbling gases at Tacana Volcano (Mexico-Guatemala): implications for volcanic surveillance

This dataset is a summary of baseline geochemical monitoring of the active Tacaná volcano–hydrothermal system (Mexico–Guatemala). Seven groups of thermal springs related to a NW/SE-oriented fault scarp cutting the summit area (4,100 masl), discharge at the northwest foot of the volcano (1,500–2,000 masl); another one on the southern ends of Tacaná (La Calera) were analyzed for their chemical and isotopic compositions.