The Importance of Integrating Geological Mapping Information with Validated Assay Data for Generating Accurate Geological Wireframes in Orebody Modelling of Mineral Deposit in Mineral Resource Estimation: A Case Study in AngloGold Ashanti, Obuasi Mine

The basis of accurate mineral resource estimates is to have a geological model which replicates the nature and style orebody. Key inputs into generation good are sample data mapping information. Obuasi Mine with lot legacy issues were subjected robust validation process integrated information generate an orebody for estimation in Block 8 Lower. Validation focused on replacing missing collar coordinates, assays, correcting magnetic declination that was used convert downhole surveys from true magnetic, fix lithology finally assign confidence numbers all data. coordinates replaced ensured plotted at their correct location space as intended planning stage. Magnetic data, maintained constant throughout years even though it changes every year, also corrected project. drillholes trajectory per planned azimuth reflected position intercepted mineralized fissure(s) previously not case marked major blot modelling incorporation mapped validated wireframes resulted better interpretation updated generated by domaining quartz sulphides compared old showed sulphide tonnes overestimated 1% grade 8.5%.