Sierra Metals has reported the results of a preliminary economic assessment (PEA) of a major expansion of production at its Cusi silver mine in Chihuahua state, Mexico. The PEA supports expansion from a current mine operating rate of 650 metric tons per day (mt/d) to 1,200 mt/d by the first quarter of 2019 and 2,700 mt/d by mid-2021. Silver production would total 30 million ounces (oz) over a mine life of nine years based on existing mineral resources.
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