Fysico-Chemical equilibrium among minerals and groundwater
DOI:
https://doi.org/10.5902/2179460X25529Abstract
Rock-forming mineral stability is comparedwith groundwater composition of certain ultrabasic massifs of Rio Grande do Sul, Brazil, under subtropical weather conditions. In this sttidy physicochemical equilibrium calculations are made, relating minerals to their hydrolisis solutions as well as relating primary to secondary minerals. These calculations permit one to draw straight line graphics that correspond to each chemical reaction and to limit stability areas whose coordinates are Mg and H4SiO4 concentrations. Plotted in these graphics are the mean compositions of the groundwater for each season of the year which indicate the relative stability scale of the different minerals and the mineralogical compounds that are in equilibrium with the environmental conditions.
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