Sierra Metals to Invest US28 Million for an Iron Ore ...
Apr 21, 2021 · Sierra Metals to Invest US28 Million for an Iron Ore Processing Plant Expected to Produce Approximately 500,000 Tonnes Per Year of Magnetite Concentrate at the Bolivar Mine, Mexico Back to video The magnetite project was previously mentioned in the Bolivar Mine's Preliminary Economic Assessment (the "Report") which was filed on SEDAR ...