Weathering Process of Black Strata and Formation of Corrosive Environmental Water

Black strata are a wildly distributed and special rock, whose weathering tends to speed up the weathering and the worsening of all rocks and the construction materials. The paper, via the geochemical process of the sulphide oxidation in the black strata, is to make analysis of the features of the acid water formed by the weathering of the black strata in the west of Hunan province, China; the stability of other minerals in the black strata under acid condition, as well as the effect on the weathering of the black strata and the formative erosion ability of the acid water by rock components, geologic formation and different movements and moving speeds of the underground water. The result shows that strongly erosive acid water formed during the oxidation and hydrolysis of the sulphureted minerals, which leads to further chemical process in black strata.