The effect of variations in rainfall on the chemical composition of vulcano fumaroles (Italy) |
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| Authors: | M Martini G Piccardi P Cellini Legittimo |
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| Institution: | 1. Institute of Mineralogy, Petrography and Geochemistry, University of Florence, Italy
2. Institute of Analytical Chemistry, University of Florence, Italy
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| Abstract: | Analytical data for samples collected over a period of 17 months at the crater fumaroles of Vulcano are given. Fluids are both condensed and absorbed in KOH solutions, thus providing a complete analysis of acid and condensable species. Variations in H2O, CO2, SO2, H2S, HCl, B, F, Br, NH4 concentrations are taken into account. Rainwater represents an important modifying facor of the basic chemical composition of the investigated discharges, which do not seem to have undergone any other significant change during the above mentioned span of time. While acting essentially as a diluting factor for CO2 and SO2, the inflow of meteoric water can introduce substantial modifications in concentrations of other constituents. As a consequence, any correct comparison of fumaroles compositions either for different systems or for different samplings at the same system should take into consideration the influence of meteorological conditions. |
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