To realize industrial manufacturing, Magna accomplished pre-stripping the mine to present it a 2.9:1 strip ratio, and that quantity is predicted to development downwards by means of the mine life. New leach pads have been constructed, and contemporary ore is being stacked at a fee of 900 tonnes per hour. The grind measurement and leach kinetics have been optimized to enhance restoration charges to about 70%. The challenge achieved over 3.5 million person-hours with out a lost-time incident.
The pre-feasibility examine accomplished final yr, estimated the San Francisco mine has measured and indicated sources of 99.7 million tonnes grading 0.45 g/t gold, containing 1.4 million oz., and inferred sources of 11.4 million tonnes at 0.45 g/t gold, containing 171,000 oz.
(This text first appeared within the Canadian Mining Journal)