黑龙江省鸡东盆地下第三系沉积环境及聚煤特征

黑龙江省第三系鸡东盆地是一个受敦密断裂带控制的线型断陷含煤盆地。应用沉积环境分析方法，对该盆地的下第三系达连河组、永庆组进行了沉积环境和聚煤特征分析，认为：该沉积环境为陆相冲积扇—扇三角洲—湖泊—河流冲积平原沉积体系，聚煤环境为扇三角洲平原和湖泊淤浅及河流冲积平原聚煤，以湖泊淤浅聚煤为最佳环境，具有两个聚煤中心。受控盆断裂影响，煤层具有明显的分叉性和迁移性。控盆(敦密)断裂同时控制了沉积厚度和沉积相带配置关系．

Paleocene depositional environment and coal bearing characteristics of Jidong basin, Heilongjiang

Jidong basin is a line type fault depression controlled by Dunhua - Mishan faults belts. The analysis of depositional environment and coal bearing characteristics of the Dalianhe formation and Yongqing formation by using the depositional environment analysis leads to the conclusion that the depositional environments consist of depositional system, including fluvial fan -fan delta - lake - fluvial plain systems. The coal bearing environments consist of fan delta plain,lake accretion and fluvial plain and the best site for coal bearing is shallow coal bearing environment and there are two coal bearing centers. As a result of the influence of Dunhua - Mishan fault, the coal beds are obviously fork and migration, and the Dunhua - Mishan fault also control the thickens of deposition and configuration relation of the deposition phase spread.