Latin American miner Sierra Metals achieved strong production results in 2018, continuing a ten-year track record of consolidated yearly ore throughput growth, as well as record quarterly ore throughput at both its Bolivar copper and Cusi silver mines, in Mexico. This is according to the company’s 2018 fourth quarter and full-year production results from its three underground mines in Latin America: the Yauricocha polymetallic mine in Peru, and the Bolivar and Cusi mines.