湖南洪山殿矿区煤系沉积特征与聚煤规律  

Sedimentary characteristic and coal accumulation in coal measures in Hongshandian mining area, Hunan

作　　者：扈金刚 唐书恒[1] 李灿[1] 王振云[1] 王善博[1] 

机构地区：[1]中国地质大学能源学院,北京100083

出　　处：《煤田地质与勘探》2014年第1期13-18,共6页Coal Geology & Exploration

基　　金：国家自然科学基金项目(41272176);教育部博士点基金项目(20110022110007)

摘　　要：在前人研究成果基础上,通过野外地质调查、室内样品测试及综合分析,系统研究了洪山殿矿区煤系沉积环境及其对煤层发育和展布特征的影响。运用层序地层学分析、沉积相划分及岩相古地理恢复等研究手段,将洪山殿矿区二叠系上统龙潭组和大隆组含煤地层划分为层序I和层序II两个三级层序;识别出1个中期基准面旋回转换面,以此将层序I划分为1个下降半旋回和1个上升半旋回,建立了龙潭组和大隆组层序地层格架;识别出三角洲平原、三角洲前缘和前三角洲等亚相,编制了岩相古地理图。研究显示:矿区沉积的主要物源方向为NNE向,海侵方向由南向北;分流河道之间的沼泽环境最有利于煤层发育,矿区蛇形山井田向南塘向斜深部延伸区域为本区深部煤炭资源预测的有利区。Based on the study of predecessors’ research results, the sedimentary environments and their influence on the development and distribution of coal seams of Hongshandian mining area are systematically analyzed by field geological investigation, sample testing and comprehensive data analysis, the results can be used to predict advantageous areas of deep coal resources. By using sequence stratigraphy analysis, sedimentary facies division and lithofacies paleogeography recovery, two third sequences including sequence I and sequence II were divided, one transitional surface of middle-term base level cycle was distinguished. Sequence I was divided into one de-clined half base level and one risen half base level, the stratigraghic framework of Longtan and Dalong Formations was established, deltaic plain facies, deltaic front facies and prodelta facies were distinguished, the lithofacies pa-leogeographic map was recovered. The sediment sources came from NNE direction, seawater invaded from the south to the north, swamp environments between distributary channels were the most favorable environments for coal seam development, the predicted favorable area for deep coal resource exploitation is located between Shex-ingshan district and Nantang syncline.

关 键 词：洪山殿矿区 层序地层格架 岩相古地理 聚煤规律 

分 类 号：P618.11[天文地球—矿床学] P539.2[天文地球—地质学]