METEORIZACIÓN E HIDROGEOQUÍMICA DE LOS RÍOS QUILISH Y PORCÓN EN LA CUENCA PORCÓN

Abstract

With the results, we can point out that the wheathering produced reactions of hydrolyse, oxidation, silicate´s dissolution, sulphurs and sulphur reactions; originating secondary minerals (clays, H4SiO4, SiO2, Fe2O3, FeOOH, Fe(OH)3, Al(OH)3, Ca2+, Mg2+, Al3+, Fe3+, Na+, K+, SO42-, Pb2+, H2AsO-4, Cu2+), part of the weathering products going to the hydrologic system, and another part remains in the soil due to its low mobility, or for cationic or anionic interchange; these reactions are determined by the free energy, Eh and pH. The hydrochemistry analysis is based on the free energy, constant of balance, saturation index, graphs Eh-pH, rNa/rCl and rCl/rHCO3-2and, standing out to be calc-sodic water, due to the silicates weathering. Basing on the results obtained of the information of free energy, we determined that all the reactions are related to the saturation index and basing on the graph Eh-pH, the iron and aluminium react forming hydroxides. Petrologic studies (30 samples) and hydrogeochemistry analysis (9 water samples), determined that the ions, colloids and molecules that are in the river owe to natural pollution.