Sierra Metals Inc. Announces Update of 10,000 Tonnes Per Day Positive Preliminary Economic Assessment Results to Now Include Iron Ore Production at its Bolivar Mine in Mexico
August 16, 2021 at 07:11 am EDT
Sierra Metals Inc. reported the results of an updated Preliminary Economic Assessment (PEA) regarding the company's Bolivar Mine, located in Chihuahua State, Mexico to now include iron ore concentrate production. The property is located in the Piedras Verdes District of Chihuahua State, Mexico, located approximately 250 kilometers southwest of the city of Chihuahua and consists of 14 mineral concessions (6,800 hectares). The Bolivar deposit is a Cu-Zn skarn and is one of many precious and base metal deposits of the Sierra Madre belt, which trends north-northwest across the states of Chihuahua, Durango, and Sonora in northwestern Mexico (Meinert, 2007). Mineralization exhibits strong stratigraphic control, and two stratigraphic horizons host the bulk of the mineralization: an upper calcic horizon, which predominantly hosts Zn-rich mineralization, and a lower dolomitic horizon, which predominantly hosts Cu-rich mineralization. In both cases, the high grades are developed where structures and associated breccia zones cross these favorable horizons near skarn-marble contacts.