摘要
吐哈盆地南缘大南湖煤田具有丰富的煤炭资源,但以往对沉积环境及聚煤规律的认识不够完善,制约了煤层的综合开采。本研究基于钻孔与剖面露头资料对大南湖煤田含煤岩系沉积特征、岩相古地理及聚煤规律进行分析。大南湖煤田主要含煤地层为西山窑组中段,包括砾岩、砂岩、粉砂岩、泥岩和煤5种岩石类型,可划分出15种岩相类型。大南湖煤田在中侏罗世早期从东北至西南方向依次发育冲积扇、河流冲积平原、河流三角洲和浅湖沉积,聚煤作用受构造沉降和物源供给的共同控制,在三角洲间湾和泛滥平原环境中最为发育。
The Dananhu coalfield at the southern Turpan-Hami Basin is rich in coal resources,but previous study of the depositional environment and coal accumulation is not complete enough,which restricts the comprehensive mining of coal seams.In this study,the depositional characteristics,lithofacies paleogeography and coal accumulation of coal-bearing formations in the Dananhu coalfield are analyzed based on drilling and sectioning outcrop data.The main coal-bearing strata in Dananhu coalfield is the middle member of Xishangyao Formation,including five rock types:conglomerate,sandstone,siltstone,mudstone and coal,and 15 types of lithofacies can be classified.The alluvial fan,fluvial alluvial plain,fluvial delta and shallow lacustrine deposits were developed from northeast to southwest during the early Middle Jurassic in the Dananhu coalfield,coal accumulation was controlled by tectonic subsidence and sediment supply,and was most developed in the distributary bay and floodplain environment.
作者
梁开华
Liang Kaihua(Shandong Coalfield Geological Survey and Research Institute,Ji'nan,Shandong,250104,China;Engineering Technology Research Center on Coal Resources Informatization of Shandong Province,Ji'nan,Shandong,250104,China)
出处
《新疆地质》
CAS
CSCD
2021年第3期470-474,共5页
Xinjiang Geology
关键词
吐哈盆地
大南湖煤田
西山窑组中段
沉积环境
聚煤规律
Turpan-Hami Basin
Dananhu coalfield
Middle member of Xishanyao Formation
Sedimentary environments
Coal accumulation
