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Sierra Metals Inc.: Sierra Metals Announces Filing of NI 43-101 Preliminary Economic Assessment Technical Report for a Doubling of Output at Its Cusi Mine in Mexico to 2,400 Tonnes Per Day, Including an After-Tax NPV of US$81 Million This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20210106005206/en/ Photo 1 Cusi Mine Arial View (Photo: Business Wire) The Report dated November 13, 2020, with an effective date of August 31,2020, is entitled "Preliminary Economic Assessment for the Cusi Mine, Chihuahua State, Mexico". The Report was prep...

Sierra Metals Inc.: Sierra Metals Announces Filing of NI 43-101 Technical Report for Significantly Increased Mineral Resource Estimate for Cusi Silver Mine, Mexico This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20201222005192/en/ Cusi Mine Arial View (Photo: Business Wire) The Report dated November 13, 2020, with an effective date of August 31, 2020, is entitled "Independent Technical Report for the Cusi Mine, Chihuahua State, Mexico." The Report was prepared for Sierra Metals by SRK Consulting (Canada) Inc. There are no material dif...