Aerogeofísica integrada a dados geológicos no apoio a exploração de ocorrências minerais na região de Caçapava do Sul/RS

Abstract

The Southern Rio Grande Shield (ESRG), located in southern Brazil, is known for its geological features that play a vital role in understanding the evolution of the South American continent. It is an area of constant research and prospective studies due to its rich mineral occurrences, such as the Camaquã Mines, which have garnered attention from geoscientists in both academic and applied fields. However, despite these ongoing exploratory projects and the attention they have attracted, there is still a notable research gap in the current understanding of specific geological and structural aspects within this region particularly regarding ongoing mineral exploration projects. These exploratory projects have sparked significant interest in the abundant literature available on the subject. The analysis and characterization of mineral occurrences, particularly base metals, are of paramount importance for the foundational industry, which is vital for the country's economy. In this context, the main objective of this study is to enhance geological and structural knowledge through remote sensing and geophysics. Specifically, it aims to integrate, analyze, and interpret aerial magnetometric data and geological data in an area adjacent to the copper occurrences known as Vitor Teixeira and Capão Grande, located in Caçapava do Sul, Rio Grande do Sul State. As a result, remote sensing and aerogeophysical anomalies maps presented significant correlations among structures, terrain morphology, and observed magnetic contrasts. A detailed area was selected based on an observed anomaly detected at the western part of the area, showing evidence of a high susceptibility rock body oriented E - W. Further investigations in this area, applying Euler Deconvolution and integrating with the magnetic filtered anomalies (RTP, Vertical Derivative, and Tilt Derivative), provided substantial understanding and allowed the definition of structures and lithologic heterogeneities that are not recognizable in surface mapping.The obtained results and integrations provided important information for further exploration approaches and geological detailing along this area.