Integração de dados aerogeofísicos e geológicos aplicados na prospecção de potássio nas adjacências de Sacramento - MG

Abstract

This study investigates potential sites for potassium prospecting in the Sacramento region of Minas Gerais, aiming to reduce Brazil's dependence on imports of this resource, which is crucial for agricultural fertilizers. The research began with a literature review and the establishment of clear objectives, followed by a description of the methodology, which highlights the use of Geographic Information Systems (GIS) for processing and integrating geophysical and geological data. Aerogeophysical and geological methods were employed to integrate gamma-spectrometric data (potassium channel) with field mapping, with the goal of identifying promising areas for potassium prospecting. The data were processed using Oasis Montaj software, which helped identify potential targets, particularly zones with high potassium concentrations known as verdetes. The results reveal that the study area exhibits geophysical anomalies that correlate with significant potassium concentrations, indicating possible exploration potential. Seven promising targets were delineated, with emphasis on Target G, where mineralization occurs at shallow depths with significant K₂O grades (between 5% and 18%). Field confirmation, including geological mapping and drilling, validated the method's effectiveness, with 17 out of 20 drill holes yielding positive results. It is concluded that the integration of geophysical and geological data optimizes mineral prospecting, reduces costs, and indicates the area is viable for the economic exploitation of potassium.