By Robb M. Stewart Sierra Metals received the permit needed to develop and mine deeper at its Yauricocha mine in Peru, a key plank in its effort to grow.
By Robb M. Stewart Sierra Metals forecasts steady base metal production this year as it prepares its core mines for longer-term growth following an increase.
By Robb M. Stewart Sierra Metals is holding to its 2023 production target following in-line metals output at its mines in Peru and Mexico so far this year..
By Mary de Wet Sierra Metals' production rose 27% in the third quarter, despite putting its Cusi silver mine in Mexico on maintenance while it seeks a buyer..