Estudo geoquímico comparativo entre rochas calcárias visando seu aproveitamento tecnológico

Abstract

Limestone is found extensively on all continents, extracted from quarries in deposits ranging in age from Precambrian to Holocene. Examples of these rocks are limestone and dolomite, representing approximately 15% of all sedimentary rocks on the surface. Several authors in important scientific papers, classify the surface limestone in the regions of Caçapava do Sul, Bagé, Pantano Grande and Vila Nova do Sul based primarily on calcium oxide content (%CaO) and magnesium oxide (%MgO). This study aims at comparative geochemical study of the calcareous rocks of the regions studied, as raw material for the production of soil correctors by analyzing the parameters required by the Ministério da Agricultura, Pecuária e Abastecimento. With the results, it can be affirmed that all the studied regions presented chemical parameters above those required by the legislation, with emphasis in the region of Caçapava do Sul that presented a better quality for the use as correctives of soil acidity.