Peru Approves Stalled Tia Maria Copper Mine Project - WSJ- maria copper mine in peru ,Peru's government approved the environmental impact study for a $1.4 billion copper mine known as Tia Maria, a large-scale project that has been stalled for the last three years after local ...Protests against Peru's Tia Maria Mine bolstered by ...Protests against Peru’s Tia Maria Mine bolstered by international solidarity ... region of southern Peru to halt the proposed Tia Maria copper mine. The mine project belongs to Southern Copper ...