山东省古近纪煤系地层赋煤特征与聚煤规律研究

Coal occurrence characteristics of Paleogene coal measure strata and coal accumulation discipline in Shandong Province

为揭示山东省古近纪煤系地层赋煤特征及聚煤规律,以层序地层学、煤田地质学为指导,结合构造地质学、沉积学的相关理论,对其赋煤特征、层序地层及聚煤作用进行研究,结果表明:山东省古近纪煤系地层为五图群李家崖组,其赋存于受断裂控制的新生代断陷盆地中,为煤层与油页岩互层的沉积建造;盆缘断裂构造活动主控黄县聚煤断陷盆地的充填沉积和演化,断陷盆地为陆相扇三角洲-湖泊沉积,沉积体系可划分出扇三角洲体系、辫状河-水下扇体系、滨浅湖-深湖浊积扇体系,以辫状河体系聚煤最为强烈,盆地水域体制的变化控制聚煤作用的发生,聚煤易发生在盆缘断裂活动比较稳定,地形差异较小,盆地水域扩张时期的滨湖地带。

In order to rveal the characteristics of Paleogene coal measure strata and the coal accumulation discipline in Shandong Province,the paper used the sequence stratigraphy and the coalfield geology as the guide in combination with the structural geology and sedimentolo-gy related theory,the coal-accumulation discipline and characteristics of Paleogene coal measure strata was discussed. It turns out conclu-sion:Wutu group Lijiaya formation is the paleogene coal measure strata in Shandong Province,which hosts in the Cenozoic fault basin con-trolled by the fracture,coal and oil shale interbedding sedimentary formation,syndepositional structure control the coal measure strata‘s sed-imentation,the sediment filling and evolution of the basin are mainly controlled by the boundary faults activities. Huangxian coal accumula-tion and fault basin is the continental facies fan dalta and lake sedimentation,the coal measures can be divided into fan delta,braided riverdelta,near shore-lacustrine marsh sedimentary system,coal accumulation is the most intense in braided river delta system,the coal accu-mulation is controlled by the basin filling and the variation of basin water mechanism and when the boundary faults activities is stable,ter-rain differences is little,lakeside zone of basin water in the period of expansion,the coal accumulation mostly take place.