The mining sector plays an important role in the Mongolian economy, and therefore it is critical that the sector be transparent, accountable and corruption-free. The corruption prevention measures will be more effective when corruption risks of the mining sector are studied systematically. Corruption prevention will be more effective if corruption risks of the mining sector are studied systematically. In response to this necessity, the Independent Research Institute of Mongolia (IRIM) conducted an assessment and identified corruption risks in the four phases of mining: exploration, pre-operation, operation and post-operation phases of the geology and mining sector.