层序地层格架与煤岩层对比——层序地层学在山西阳曲煤田普查勘探中的应用

Sequence Stratigraphic Framework and Correlation of Coal and Rock Seams --Sequence stratigraphy applied to coal exploration inYangqu,Shanxi

在华北晚古生代聚煤盆地及勘探区周边地区含煤地层沉积学、层序地层学的已有成果基础上 ,立足于单剖面定量沉积环境分析和露头层序地层分析 ,对阳曲普查勘探区含煤地层进行了进一步的高分辨率层序地层学研究 ,识别出基岩型、陆表海II型、陆表海I型层序界面和基岩泻湖型、台地—滨岸复合型、碎屑滨岸型、沼泽型、浅水三角洲型准层序类型 ,划分了二个四级层序、14个准层序 ,建立了准层序级别的层序地层格架 ,籍此进行了区内及邻区含煤地层主要煤岩层的对比。探讨、总结了应用层序地层学理论进行勘探区煤岩层对比的方法。

Based on the previous studies on the sedimentology and sequence stratigraphy of coal bearing strata in late paleozoic basin of North China and the peripheral exploration area,high resoultion sequence stratigraphic study has been performed on coal bearing strata in the exploration area of Yangqu area according to the quantitative depositional environment analysis on individual section,and outcrop sequence stratigraphy.We have recognized 3 types of basement sequence interfaces,type I and Ⅱ of epicontinental sea,and 5 types of parasequences basement lagoon,platform and coast complex,clastic offshore,swamp and shallow delta. Furthermore,2 sequences of and 14 parasequences have been classified,on which the sequence stratigraphy framework has been set up in the study area on the bases of these studies,the main coal and rock seams of the explortion area and its vicinity have been correlted.As a result,the paper also discussed and summarized the method and procedure to apply theories of sequence stratigraphy to correlation of coal and rock seams in the exploration area.