内蒙古乌尼特煤田含煤地层层序划分与聚煤规律-煤田地质与勘探.PDF

第39 卷 第6 期 煤田地质与勘探 Vol. 39 No.6 2011 年 12 月 COAL GEOLOGY EXPLORATION Dec. 2011 文章编号: 1001-1986(2011)06-0001-05 内蒙古乌尼特煤田含煤地层层序划分与聚煤规律 郭东鑫，唐书恒，郑贵强，张静平，李忠城 ( 中国地质大学能源学院，北京 100083) : 通过对乌尼特煤田白垩系下统巴彦花组含煤地层的研究，识别出两个层序界面SB1 和SB2 ， 划分出 SMC1、SMC2 和 SMC3 共 3 个三级层序，建立了巴彦花组层序地层格架。在地层中，识 别出浅湖、滨湖、三角洲和河流相等沉积相类型，其中滨湖相和河流三角洲相是本区煤层的主要 沉积环境。根据钻井岩心资料、煤层厚度分布、砂泥比和层序地层格架展布，编制了岩相古地理 图。研究成果对该区的煤炭资源勘探开发有指导意义。 ：乌尼特煤田；层序；沉积相；聚煤规律 ：P618.11; P539.2 ：A DOI: 10.3969/j.issn.1001-1986.2011.06.001 Sequence strata and the coal accumulation of Wunite coafield, Inner Mongolia GUO Dongxin, TANG Shuheng, ZHENG Guiqiang, ZHANG Jingping, LI Zhongcheng (School of Energy Resource, China University of Geosciences, Beijing 100083, China) Abstract: Based on the study of the stratigraphy sequence of the Bayanhua Formation of low Cretaceous in Wunite coafield, two sequence boundaries SB1 and SB2 were distinguished, three third sequences including SMC1, SMC2 and SMC3 were divided, and the stratigraphy framework of the Bayanhua Formation was established. The facies analysis shows that the strata were developed from lacustrine facies, delta facies and fluvial facies deposition. And lake offshore facies and river delta facies were the predominant paleoenvironment for coal formation. Finally, ac- cording to the core data, thickness of the coal layer, the proportion of sand and mud in the strata and the distribution of the stratigraphy sequence, the lithofacies paleographic map was made, which will provide a helpful guidance to the exploration and development of the coal around the area. Key words: Wunite coafield; sequence; sedimentary facies; coal accumulation 2008 58.33 t