ESTUDO HIDROGEOLÓGICO DA FORMAÇÃO SERRA GERAL NA REGIÃO SUDOESTE DO ESTADO DO PARANÁ

Abstract

The study area is localized in the southwestern in Parana state with area just about 8.675 km². In the area outcrop the basalts and andesites from Serra Geral Formation. The purpose of the study were  hydrochemistry characterization and classified by majors ions. These rocks is composed by augite pyroxene, as well as plagioclase. The hydrochemical types were obtained from the miliequivalence relation between the main elements, expressed as cations and anions, using the Piper’s triangular diagram The typical waters, are bicarbonate calcium and bicarbonate sodium, but there are bicarbonate mixing and one date of sulphatade sodium. In this work are used 57 analyses physical-chemistry located in the Serra Geral Formation. The analised parameters were: HCO₃^-, CO₃^2-, Cl^-, SO₄^2- , Ca²⁺, Mg²⁺, Na⁺, K⁺ electrical conductivity, total solids and pH. These data also analyzed in Khorzinskii diagram for parameters were Na⁺; Ca²⁺; K⁺ e H₂SiO₄ . The avereging DBI observed is 3,17%. Also were used 25 datas of rock analyses and the same 57 datas of groundwater analyses in a ternary diagram expressed in concentrations (meq/L) to this parameters; Ca²⁺, Mg²⁺, Na⁺, and K⁺. The results indicate that pH is ranging from 6,69 to 9,95. The STD is ranging from 423 a 52 mg/L. The fluoride concentration is ranging from 0,01 to 2,95 mg/L. The results obtained show saturation index in equilibrium for calcite, quartz, dolomite, chalcedony and aragonita.