河东煤田离柳矿区石炭-二叠系沉积相

Sedimentary Rock Characteristics and Facies of the Carboniferous-Permian Stratigraphy in Liliu District,Hedong Coalfield

本文运用野外实测剖面和新的地层划分方法,对鄂尔多斯盆地东部河东煤田离柳矿区苏村-毛港剖面石炭-二叠系沉积地层进行详细的沉积岩石学研究.根据岩相组合及沉积结构、构造特征可识别出本区自晚石炭世至晚二叠世早期发育的沉积相包括:障壁滨海-泻湖相、潮坪相、海滩相、三角洲相、碳酸盐岩台地相以及陆上火山喷发相.研究发现泥舌穿刺结构、鲕绿泥石和海绿石的出现及沉积相特征表明本区中-上二叠统的沉积相属海陆交互相而非陆相.

We studied Liliu District of Hedong Coalfield,eastern edge of the Ordos Basin,by using field measured sections and the new stratigraphic classification method to explore the detailed stratigraphy and sedimentary petrology in Sucun-Maogang section from Carboniferous to Permian. According to the rock sequence,the texture and structural characteristics,the following facies can be identified： the coastal barrier-lagoon,tidal flat,beach,delta,carbonate platform and volcanic eruption facies with the Late Carboniferous to Late Permian development in this area. The occurrences of piercing structure,chamosite and glauconite indicate a transitional face of the Middle-Upper Permian rather than continental face.