摘要
阳泉矿区煤系地层形成于海陆交互相的过渡环境，其煤层的形成、赋存、厚度变化、分布均受沉积环境的控制和影响。根据分析成煤环境、预测煤层赋存变化情况。
The exposed strata in the Yangquan mining district,Yangquan,Shanxi consist,from east to west,of the Ordovician,Carboniferous and Permian strata. The coal-bearing strata here are mosdy composed of Upper Carboniferous Taiyuan Formation and Lower Permian Shanxi Formation,and laid down in the terrestrial-marine transitional environments. The Taiyuan Formation represents a succession of mixed littoral,carbonate platform and deltaic sedi- ments,while the Shanxi Formation represents a succession of delta plain sediments.The occurrence and thickness of the coal seams are controlled by depositional environments.For instance,the coal seams developed on littoral bars tend to be relatively thick,with thick coal seams overlying upon the underlying sandbodies;those grounded on delta fronts tend to be less thick and arranged locally upon the channel mouth bars,and those in the transitional zones between upper and lower delta plains also tend to be relatively thick,with thick coal seams unconformably overlying upon the underlying sand- stone bodies.The results of study have assisted in the further exploration and exploitation of coal re- sources in the study area.
关键词
沉积环境
成煤作用
含煤地层
煤矿床
depositional environment
coal formation
coal thickness and occurrence
