Peru
Sierra Metals wins key operating permit for Peru copper mine
Sierra Metals (SMTSF) obtains key operating permit for its Yauricocha mine in Peru, a key part of its effort to raise production.
Sierra Metals (OTCQX:SMTSF) +10.5% in Wednesday's trading after saying it received the required permit to develop and mine deeper at its Yauricocha mine in Peru, a key part of the company's effort to raise copper production.
The miner said it receive... [725 chars]