A delayed $4 billion deal aimed at spurring development of Mongolia's enormous Tavan Tolgoi coal mine has only a slim chance of going ahead, partly due to China's slowing growth. A plan for a consortium of Mongolian Mining Corp, China's Shenhua Energy and Japan's Sumitomo Corp to take over the operations of state-owned Erdenes Tavan Tolgoi was blocked by Mongolia's parliament speaker in April, leaving the future of the deal in the hands of lawmakers.