Former premier made unannounced visit to capital Mongolia last month . Met new Mongolian prime minister Chimed Saikhanbileg on trip , sparking fears from ecologists he was encouraging Western investment in mining . Noyon Uul region has major gold reserves but many sacred burial mounds . Exploitation may 'destroy monuments of the Mongols and their ancestors ' Mr Blair admits to 'regular ' Mongolia visits but denies discussing mining .
Former premier made unannounced visit to capital Ulaanbataar last month . Met new Mongolian prime minister Chimed Saikhanbileg on trip , sparking fears from ecologists he was encouraging Western investment in mining . Noyon Uul region has major gold reserves but many sacred burial mounds . Exploitation may 'destroy monuments of the Mongols and their ancestors ' Mr Blair admits to 'regular ' Mongolia visits but denies discussing mining .