Commodity Ore Grades Geology Powder Factor Location Gold 0.6 g/t ** Disseminated 1.3 kg/m 3 Latin America This operation is one of the top-producing open-pit gold mines in Latin America. ? Polymetallic, producing gold, silver, lead and zinc ? Mines 15 m (50 ft) benches in a single pass ? Mineralisation is contained in quartz porphyries Substantial movement of ore during blast resulted in ore loss and dilution The BMM System accurately measured blast movement and translated post-blast dig lines ? Very high powder factors are required to achieve sufficient fragmentation ? Significant displacement of ore during blasting led to poor ore yield ? Large power troughs and heave measurements indicated that the bulk movement of ore contributed to the m i ne’ s overall dil

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