(EnergyAsia, September 13 2011, Tuesday) — Mongolian state-owned miner Erdenes Tavan Tolgoi (ETT) has selected a consortium comprising Australia’s Macmahon Holdings Ltd and Germany’s BBM Operta as contractors to mine a section of its giant Tavan Tolgoi coal deposit.Mcmahon said the consortium will undertake large scale open cut mining operations in the Eastern Tsankhi area…