3D Geological Resource Model and Tentative Reserve Estimation of Lateritic Nickel, Uganda using SURPAC software

The geological resource estimation conducted for the mines in Uganda, a comprehensive evaluation of nickel reserves utilizing data from 32 boreholes was done by Geovale for the client. The study carried out in 2019, delineates the total geological resources of nickel within the study area, highlighting both the global estimates and detailed breakdowns based on various cutoff grades and ore types. A tentative pit design was also prepared acknowledging its limitations and emphasizing its role in guiding future exploration endeavors.

Geovale’s Approach

Data validation and preparation of borehole database was carried out in SURPAC software to establish a strong foundation for auditing, visualization, and decision-making in mining or exploration projects.

Geological cross-sections were prepared which facilitated visually depicting the formations, offering clarity on lithological distribution in the prospect area, aiding mineralization interpretation.

Solid model/ wireframing was carried out utilizing geological cross-sections to accurately depict the spatial distribution and shape of the ore body. Various triangulation methods were employed to construct valid solid models, forming a comprehensive representation of the ore body.

Block modeling was carried out to represent the mineral deposit with attributes stored at block centroids in 3D space. The entire solid model is divided into smaller blocks and sub-blocks with attributes that allow accurate estimates of ore resources.

Grade estimation and resource estimation were carried out by using inverse distance weightage and partial percentage methods.

Pit design was carried out ensuring compliance with legal and geotechnical standards while optimizing ore extraction and minimizing waste. Geovale designed a pit considering standard parameters and ongoing exploration needs.

Reserve estimation was carried out after clipping the solid ore model with the prepared pit design.

Conclusion

Geovale Services' project on geological resource estimation and pit design for the mines in Uganda demonstrated a meticulous and systematic approach to mining exploration. Careful execution of tasks ranging from data validation and geological analysis to resource estimation and pit design lays a strong foundation for future endeavors.