Dissolved potassium in the shallow groundwaters circulating in the volcanic rocks of central-southern Italy

摘要: Abstract The water–rock interaction processes occurring in the low-temperature, shallow volcanic aquifers of central-southern Italy were simulated by means EQ3/6 Software Package reaction progress mode. In investigation both Roman Magmatic Province and Monte Amiata, which belongs to Tuscan Province, included. average K2O content rocks from two areas is similar but main K-bearing phases are leucite, sanidine, at Amiata. Computed concentrations major dissolved components SiO2 consistent with analytical data, suggesting that results runs reliable simulations natural processes. Hence, can be used investigate transfer K water. It turns out attainment saturation during early stages rock dissolution, limits concentration Amiata groundwaters around an 2.9 ± 1.3 mg L−1 (1SD). silica undersaturated leucite not attained evolution and, consequently, reaches comparatively high levels, 24.6 ± 27.1 mg L−1 Most these unusually due weathering silicates without any anthropogenic influence.