Aplicação da geoestatística no rastreamento de magnetita na Mina do Sossego a partir de dados de suscetibilidade magnética

Abstract

The geostatistics today, mainly with the increasing complexity of the calculation, is not restricted only to the Geology and Mining Engineering, but has shown great success in many areas of knowledge. This work is a case study on the mineral deposits at the Sossego mine complex, located in the Canaã dos Carajás - Pará, whose focus is the distribution of the contents of magnetite in the mine, from the grades of magnetic susceptibility (MS), which interfere with the performance of the treatment of copper ore (chalcopyrite), especially the stages of grinding and flotation. The first stage of this mainly is research was to read the theoretical reference on techniques for geostatistical estimation and characterization of magnetite and its interference in the processing of copper ore, emphasizing the relation to milling and flotation. Also, has been acquired data from magnetic susceptibility works base survey, and others informations about estimating grades and geological features of deposit. Further has been made a description of local geology and the MS database to create the geostatistical processing routines, like exploratory data analysis, analysis of spatial correlation, interpolation of levels, estimation and validation of 3D modeling. The estimated grades of magnetic susceptibility led to the identification of high values of magnetite that could be where the observation and attention could be more careful. Thus, this work that has been founded in the geostatistical processing studies of MS at the Sossego mine complex, albeit in a preliminary, the data of magnetic susceptibility may indicate that the distribution of this contaminant, serving as a starting point for more detailed studies that allow changes in the mining and beneficiation at the mine who studied further increase its efficiency.