Abstract:

In recent years, 3D geological modeling technology has been widely researched and applied in three-dimensional spatial structure analysis and metallogenic prediction along with the development of computer technology. F₇ structural belt is an important ore-bearing structure of the Xiangyangping uranium deposit in north of Guangxi, and several rich ore bodies have been exposed. In this paper, GOCAD is used as the modeling platform and F₇ structural belt is the key research object. The three-dimensional geological model of the working area is established by using the digital geosciences information such as geology, drilling and geophysical prospecting of the Xiangyangping uranium deposit, which visually displays the rock mass, structure and ore body of F₇ structural belt. The model shows that the boundary of rock mass is complex and variable and the ore body is strictly controlled by the fault zone. At the same time, on the basis of 3D model, the semi-quantitative simulation of geological alteration information is realized through geostatistical method by the digitization of geological catalogue data. The results show that the deep overlapped sites with strong hematitization, silicification, potash feldspathization and hydromicazation are likely to have rich ore bodies. Through the comprehensive study and analysis of the 3D geological model in the working area, it is concluded that the deep south of F₇₁₀ structure has a good metallogenic potentiality, which provides a scientific basis for the next prospecting direction of F₇ structural belt in Xiangyangping uranium deposit.

Key words: Xiangyangping uranium deposit, F₇ structural belt, 3D geological modeling, alteration zone simulation, deep prospecting