黑龙江柳树盆地沉积环境及聚煤规律

柳树盆地是与敦密断裂构造活动密切相关的含煤盆地，主要发育白垩系穆棱组含煤地层。利用实测剖面、钻孔岩心及测井曲线资料，对该盆地含煤地层沉积环境、层序地层及聚煤特征进行研究，在研究区识别出5种岩相、11种岩相类型，识别出5种沉积体系、11种沉积相和多种沉积类型。黑龙江东部地区早白垩世共识别出六个层序界面，五个三级层序。柳树盆地主要发育层序S4和层序S5。主要的成煤环境为三角洲平原淤积沼泽，主要发育在湖浸体系域时期。 

Sedimentary environment and coal accumulation patterns of the Liushu basin,Heilongjiang Province

Liushu basin is a caol basin which is closely related to the tectonic activity of Dunmi fracture belts, mainly develops the CretaceousMuling group. Using Liushu basin's measured sections, drilling cores and well logs data to study the depositional environments and sequence stratum and coal bearing characteristics of Cretaceous coal-bearing stratums. In the research area we identify 5 kinds of lithofacies and 11 types of lithofacies, identify5kinds sedimentary system and 11 kinds sedimentary facies. In the east of Heilongjaing we identify 6 sequence boundaries, 5three-grade sequence interfaces. Liushu basin mainly develops sequence S4 and S5. The deltaic plain swamp which developed at transgression system track is the mainly coal forming environment.