贵州毕节煤田可乐矿区含煤地层沉积环境及聚煤特征研究

Research on Coal Bearing Strata Sedimentary Environment and Coal Accumulation Characteristics in Bijie Mining of Guizhou Province

通过对毕节煤田可乐矿区二叠系宣威组、龙潭组、长兴组的岩性岩相组合特征、沉积构造特征、古气候条件、动植物化石的分析,得出区内结构-溪平一带为陆相沉积的宣威组,财神及青场一带为海陆交互相沉积的龙潭组和长兴组,聚煤特征主要为滨海冲积平原成煤和三角洲平原成煤。

Through analyzing,the lithology and lithofacies,assemblage characteristics,sedimentary structure feature,climate,fossils analysis of Xuanwei,Longtan,Changxin group in Bijie coal mining of Guizhou Province,in Bijie coal mining region,it is continental deposits of Xuanwei formation along Jiegou-Xiping. Along Caishen and Qingchang,it is sea and land interaction deposition of Longtan and Changxin group. The coal accumulation is coastal alluvial plain and delta plain.