9 Integrated Buckingham geological model in Minex V arious Project: Resource estimation for nickel laterites. Scope: Nickel laterites, in particular the saprolites, present diffcult challenges for resource estimation. The geometry is complex due to the presence of low-grade or waste boulders and the bedrock contact is highly irregular at a scale which is much smaller than the typical drilling grid. Outcome: SRK introduced an innovative estimation method based on uniform conditioning, extended to several variables, aimed at reproducing the real degree of mining selectivity likely to be achieved in practice. Hampton Mining Project: Medium-sized copper porphyries and copper - gold veins, Chile and southern Peru. Scope: Early to advanced stage copper projects at resource defnition drilling stage, to mining scoping study to early pre-feasibility . Outcome: Provided the client with tailored integrated services, beginning with early exploration resource defnition, and including geotechnical, environmental and mining aspects of ongoing engineering and feasibility studies. R ain y Ri ver R esources Project: Rainy River gold project, Ontario, Canada. Scope: Produce a resource update to address defciencies in an earlier study . Outcome: Detailed structural analyses led to the construction of unique 3D geological/ geostatistical domains which were further refned using Leapfrog software. Resources were reported at multiple cut - offs to refect `reasonable prospects of economic extraction’ . The resulting resource estimate will allow the client to make technically-sound strategic decisions on the future of the resource. African Minerals Project: T onkolili, Sierra Leone. Scope: Review the extensive data collected during a two - year drilling program, assist in the detailed logging of the overlying hematite cover and underlying magnetite itabirite, produce 3D geological models, and prepare the project’ s frst resource estimate (which has since been updated). Outcome: The most recent resource estimate produced by SRK exceeds 5Bt at a mean grade of 30 total iron, making it one of the largest magnetite iron ore projects in the world.