Teck Resources (TSX: TECK.A, TECK.B)(NYSE: TECK) said on Monday its Quebrada Blanca (QB) mine in Chile is showing signs of recovery, following months of underperformance that raised questions about the mine’s viability and future role in the company’s $53 billion merger with Anglo American (LON: AAL).The Canadian miner noted that mill throughput and copper recoveries at QB are now tracking in line with expectations, thanks to an action plan launched in August. The improvement follows a broader operational r ...