彬长地区延安组含煤地层沉积特征  

Sedimentary characteristics of coal-bearing strata for Yanan Formation in Binchang region

作　　者：邓春苗[1] 汤达祯[1] 许浩[1] 陶树[1] 

机构地区：[1]中国地质大学(北京)能源学院海相储层演化与油气富集机理教育部重点实验室,北京100083

出　　处：《洁净煤技术》2011年第1期112-115,共4页Clean Coal Technology

基　　金：国家科技重大专项(2008ZX05034-001);油气沉积地质教育部创新团队(IRT0864)

摘　　要：应用层序地层学的理论,建立鄂尔多斯彬长地区延安组煤系地层发育的等时格架,划分煤系发育的沉积体系及微相,总结沉积演化特征。研究表明:延安组地层以三段发育为主,可划分为1个三级层序,3个四级层序,区内为曲流河沉积体系,沉积微相以河漫沼泽、河漫滩、分流见湾为主,其中沼泽和平原环境是发育连续稳定厚煤层的优势环境。By using the sequence stratigraphic theory,the isochronal stratigraphic framework of coal measure strata was established for Yanan Formation in Binchang region,Ordos Basin.The depositional systems and sedimentary microfacies were divided,and the sedimentary evolution characteristics were summarized.The results show that Yanan Formation mainly contains three segments,and it can be subdivided into one three-order Sequence and three four-order Sequence.Sedimentary system in study area is meandering river,which consists of flood plain,swamp and interdistributary bay microfacies.In particular,swamp and plain are the favorable environments for forming thick and stable coal measures.

关 键 词：层序地层学 彬长地区 延安组 煤系地层 沉积 

分 类 号：P618.130.2[天文地球—矿床学]