黑龙江省东部中新生代成煤盆地构造演化研究

Tectonic evolution of Mesozoic and Cenozoic coal-forming basins in eastern Heilongjiang Province

以黑龙江省煤炭资源潜力评价资料为基础,分析了该区域盆地构造特征和演化过程、煤系赋存与构造控制特征。资料分析表明,黑龙江省东部在早白垩世为统一的大型大陆边缘成煤盆地,晚白垩世由于板块俯冲的正面汇聚作用较强,形成挤压环境使这一大型盆地遭受改造破坏。成煤盆地的构造演化主要经历了两期构造沉降和两期构造反转,两期的构造沉降形成了东部地区的成煤盆地,随后发生的两期构造反转对煤系的保存有一定的破坏作用,两方面构造作用的叠加,造就了煤系赋存在一系列孤立的中小型煤盆地的构造格局。

Based on the evaluation data of coal resources potential in Heilongjiang Province,the structural characteristics and evolution process of the regional basins are analyzed,and the occurrence and structural control characteristics of coalbearing are analyzed. Data analysis shows that in eastern Heilongjiang Province,a large continental margin coal basin was formed in the early Cretaceous,in Late Cretaceous,the large basin was destroyed because of the strong convergence of plate subduction. The tectonic evolution of the coal-forming basin has undergone two periods of structural subsidence and two tectonic reversals. The tectonic subsidence of two periods formed the coal-forming basin in Heilongjiang Province,and the subsequent two structural reversals have some destructive effects on the coal-bearing occurrence. The superimposition of the two tectonic actions has resulted in the situation that the coal measures occur in a series of isolated small and medium-sized coal basins.