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Gran Colombia Gold to switch Marmato project from open pit to underground

Cecilia Jamasmie | October 04, 2017 | 8:02 am Precious Metals Canada Latin America Gold Silver 

Shares in Gran Colombia Gold (TSX:GCM) climbed Wednesday after the Canadian miner updated mineral resource estimates for its Marmato project in Colombia and said it had begun scoping studies to switch from open pit mining to underground. Marmato underground gold mine is expected to...

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