Mapeamentos das frentes de lavra da mina de bauxita de Juruti – PA

Abstract

The bauxite deposit of Juruti region is “blanket” type, in other words, it extends for a large area and has lateral variations in Iron, Sílica and Aluminium contents, however, the thickness rarely exceeds 10 meters. They localized estratigraphically in Amazonas Basin on Alter do Chão Formation, under Capiranga, Mauari, Central and Guaraná plateaus and has Plio-Pleistocenic age. The typical lateritic profile of the deposits is divided into three zones: Belterra clay, lateritic zone and saprolitic zone. The most important section is lateritic zone, since it presents economic value. Therefore, it can be sectioned into three subzones: nodular bauxite, laterite and massive bauxite. The zone lateritic that has a several bauxite typology is explored by means of stripping mining method. The mining monitoring is executed by canalets samples in intervals of 25 meters that building mining blocks. The mining face mapping is made through pictures in order to delimitate the several found typologies, which directly affects their chemical and physical characteristics. The results, specially the mapping, which focusing several bauxite type was uniquely possible by chemical analysis information and the mining block pictures, along with the quality analysis of mining face according to desired company parameters. In conclusion, the collected information was required to define the best mining face in terms of quality not only to the company but also to the market.