1.School of Geology and Mining Engineering,Xinjiang University,Urumqi ,China;2.No.161 Geology Exploration Team,Xinjiang Coalfield Geology Bureau,Urumqi ,China

为了明确三塘湖煤田西山窑组主力煤层的富集成因,基于三塘湖煤田的钻孔、测井、古生物等资料,通过对沉积相、沉积岩体叠置样式、岩相等变化将西山窑组划分为1个四级层序及高位、湖侵、低位3个体系域,建立了三塘湖煤田西山窑组地层格架。研究结果表明:三塘湖物源主要来自西北部的大哈莆提克山、北部的苏海图山和东北部的克孜勒塔格山,盆地沉积中心位于中部的汉水泉和条湖凹陷区。该时期的成煤环境主要以潮湿森林沼泽相及较浅覆水森林沼泽相为主,成煤植物主要由桫椤科、苏铁科、松科为主的木本植物及少量海金沙科、紫萁科等草本植物构成,煤层主要分布在湖侵体系域近最大湖泛面附近,辫状河三角洲间湾和湖湾以及下辫状河三角洲平原地区是最有利的煤炭聚集的沉积环境。

In order to make a clear on the enrichment causes of the major seam in Xishanyao Formation of Santanghu Coalfield,based on the drilling,logging,paleontology and information of Santnghu Coalfield,with the sedimentary facies,sedimentary rock superimposed mode,lithofacies and other variations,the Xishan Formation was divided to a four grade bed succession,a three system tract of high level,lake transgression and low level and a stratigraphy framework of Xishanyao Formation in Santanghu Coalfield was established.The study result showed that the material sources of Santanghu Basin were mainly came from Dahaputike Mountain in the Northwest,Suhaitu Mountain in the North part and Keziletage Mountain in the Northeast and The deposition center of the basin was located in the center of Hanshui Spring and the sag zone of Tiaohu.In this period,the coal formation environment mainly were the moist forest-swamp facies and shallow water forest swamp facies and the coal forming plants were composed of the woody plants,mainly including the cyatheaceae,cycadaceae and pinaceae and the herbaceous plants,including little lygodiaceae,osmundaceae and others.The seams were mainly distributed in the maximum lake flooding surface nearby the lake transgression system area,the delta bay and lake bay of the braided river and the delta plain area of the downstream braided river would be the most favorable to the coal accumulated deposition environment.