海拉尔盆地群的主要含煤地层为下白垩统扎赉诺尔群,从聚煤规律上看,盆地充填序列的转化期即是重要聚煤期,下含煤段(南屯组)的煤层向盆地边缘迁移,煤层不发育,分布也不连续,含煤性差;中含煤段(大磨拐河组)的煤层,全区发育,但在个别盆地中也是盆地边缘煤层较集中,连续性好(如伊敏勘探区位于东南部,河东区则位于北西部,中部变为泥砾岩段), The main coal-bearing strata in the Hailar Basin are the Lower Cretaceous Zazanuoer Group. From the point of coal accumulation law, the conversion period of the filling sequence in the basin is an important coal formation stage. The coal seams of the lower coal-bearing section (Nantun Formation) The coal seam in the coal-bearing section (Damoguaihe Formation) is well developed in the whole region, but in the individual basins, the coal seams in the margin of the basin are more concentrated and the continuity is good If the Yimin prospecting area is located in the southeast, the Hedong area is located in the northwestern part and the middle part is the muddy conglomerate)