Caracterização do perfil laterítico dos depósitos da província bauxitífera de Paragominas em Rondon do Pará, bloco sul do Projeto Alumina Rondon. 2018

Abstract

This final paper has as the aims to study a laterite profile located northeast of the southern block of the Paragominas Bauxite Province located in the Rondon do Pará city. The studied area is geologically inserted in the Lithostratigraphic Unit called Mature Lateritic Unit formed by alteration processes in Cretaceous rocks from the Itapecurú Group. The present work contributed to the understanding of the geological evolution of the lateritic profile subsidized by petrographic descriptions and analyzed by X-ray Diffraction (XRD). The profile was subdivided into six different horizons, Clay Horizon (CH), Ferruginous Bauxite Horizon (FB), Alumina Ferruginous Lateritic (AFL), Upper Bauxite Horizon (UB) and Clay Cover (CC). The data raised during this work had supplied bases for the understanding of the metallogenetic processes that had acted in the enrichment and the gibbisitic distribution of horizons that however they occur as grains and however, they occur as cement in horizons BI and BS. Thus, this work contributed to a better understanding of the bauxite genesis in the zone 2 from the metallogenetic unit, Paragominas Bauxite Province.