Análise quantitativa de fraturas mineralizadas em sistemas cársticos: um estudo estrutural da Caverna Deuza (Grupo Vazante - MG).

Abstract

This study presents a multiscale structural and quantitative analysis of mineralized fractures in Deuza Cave (Vazante Group, MG, Brazil), within the Brasília Belt. The objective to quantify fracture density (P20) and fracture intensity (P21) at four observation windows (2 m, 1 m, 0.5 m, 0.1 m) and assess their variation across structural domains (fault zones, mafic dikes, folding zones, and background blocks). Digital image-based mapping and vectorization were integrated with the Fracture Analyzer to compute P20 and P21. Results show a strong association between fault zones and high fracture values, with P20 peaking at 1 m and P21 peaking at 0.1 m, indicating enhanced small-scale connectivity within faults. These findings strengthen the hypogene speleogenesis model for Deuza Cave and provide a quantitative basis for flow modeling in fractured carbonates.