Istituto di Geoscienze e Georisorse     
Duchi V., Minissale A., Rossi R. Chemistry of thermal springs in the Larderello-Travale geothermal region, southern Tuscany, Italy. In: Applied Geochemistry, vol. 1 pp. 659 - 667. Elsevier, 1986.
Thirty-two thermal springs, eleven cold springs, and six steam condensates in the Larderello-Travale geothermal region have been studied from a geological point of view. The aim of this work was to delineate the relation between the chemical composition of the natural thermal manifestations and the thermal anomaly, wich is among the best known in the world. The Larderello springs, both hot and cold, are characterized by low salinity (total dissolved solids generally lower than 1000 mg/kg), and alkaline-earth bicarbonate composition. In contrast, an alkaline-earth sulfate composition characterizes the thermal springs of the Travale area. This difference is due to the fact that the underground pathways of the Larderello hot springs are only in shallow flyschoid cap rock formations, whereas at Travale the paths are longer and in carbonate-anhydritic Mesozoic rocks, which consitute the main reservoir formations in both the Larderello and Travale area. The thermal character of Larderello springs is therefore, mainly due to the rocks conduction, whereas in Travale is mostly due to inflows of hot fluid phases from geothermal reservoir. Comparison between ammonia, Li and B in fluid phases (both steam condensate and hot springs) in the Larderello area suggests that in some of them, their temperatures might be partly due to direct vapor inflows.
URL: http://https://www.journals.elsevier.com/applied-geochemistry/
Subject thermal springs
waters: analytical data
Larderello geothermal field
Travale geothermal field
chemical thermometers

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