Tanjung Enim is one of the most well-known coalfields in Indonesia. It is situated in the middle of the South Sumatra Basin while the main coal produces from the lower group of Muara Enim Formation, Miocene-Pliocene in age. The lower group of the Muara Enim Formation consists of five main seams overlying the Air Benakat Formation and intercalate with claystone, sandstone and tuffaceous sandstone. Intrusion existence and volcanism influence in the formation differs it from the coalfields in Borneo. Batholith and sill intrusion is example of volcanism activities in the area. This is a product of subduction phenomena which activate the ring of fire and Bukit Barisan in South Sumatera. Research conducted by geological mapping and analysis of proximate data. Generally, coal lithotype in Tanjung Enim has varied characteristic. Coal near intrusions characterized by black color, bright 80% dull 20%, brittle, black streak, pyrite mineral was filled in cleat, conchoidal cleveage.Analysis indicates that calorific value near intrusion area has higher value than coal without intrusion effect. Calorific value of the coal near intrusion ranged from 7330 kCal/kg to 7855 kCal/kg. On the other side, coal from other location which is 3,5 km far from the intrusion has varied calorific value ranged from 4597 kCal/kg to 5099 kCal/kg of coal as received.