湖北省中、晚二叠世煤系沉积期地质构造特征及其控煤作用

Structural Characteristics and Coal Controlling during Mid-Late Permian Coal Measures Depositional Stage in Hubei Province

湖北省中、晚二叠世煤系沉积期的古构造格架是"两隆夹一坳",北部为北西向秦淮巨型隆起、南部为东西向江南巨型隆起,两隆起之间为近东西向的大型波状坳陷盆地—湖北坳陷,该聚煤盆地的形成及总体展布受南北两个巨型隆起带控制,在中、晚二叠世湖北坳陷处于陆表海环境,接受了海陆交互相的含煤岩系沉积,煤系沉积与分布受盆地的控制,厚煤层和富煤带主要呈北西向展布,与聚煤盆地内次级坳陷相吻合。

The paleotectonic framework during the Hubei Province mid-late Permian coal measures depositional stage is ＂a depression between two culminations＂,i.e.the northwest trending Qinlin-Huaihe megaculmination to the north,the EW Jiangnan megaculmination to the south,and the near EW large undulating down-warped basin-Hubei depression between.The formation and spreading in the mass of the coal accumulation basin are controlled by the two megaculminations both sides,During the mid-late Permian,the depression was stood in an epicontinental sea environment,and accepted marine-terrestrial facies coal-bearing strata deposition,the deposition and distribution were controlled by the basin,thick coal seams and coal-rich zone present northwestern orientation spreading,coincided with the secondary depressions in the coal accumulation basin.