BHP wants find a way to up output for the industrial metal from its Olympic Dam by 40% even before a proposed and long-awaited mega-expansion of the operation takes place.
The program calls for 10,000 meters of core drilling designed to expand by as much as 800 meters the block cave shapes that confine the current resource estimate
The 60-day decree affects 11 districts in the Madre de Dios region, where several studies have found high levels of the toxic element in people, rivers and fish.