山东彭庄煤矿石炭-二叠系孢粉特征与成煤环境

摘要

利用钻孔岩心资料对彭庄煤矿的石炭–二叠系各个组段的孢粉组合特征进行了系统研究。根据孢粉化石的纵向分布规律及其含量变化，识别出四个孢粉组合，自下而上分别是：太原组Laevigatosporites perminutus-Granulatisporites granulatus组合；山西组Gulisporites cochlearius-Leiotriletes adnatus- Sinulatisporites sinensis组合；下石盒子组Apiculatisporites aculeatus-Gulisporites laevigatus-Macrotorispora minuta组合，上石盒子组Patellisporites meishanensis-Sinulatisporites sinensis-Florinites antiquus组合。依据地层岩石特征，初步恢复了本区的成煤环境：太原组为海陆交互相沉积环境，而从山西组开始沉积环境逐渐转变为三角洲平原相为主的过渡相沉积环境。%The Carboniferous and Permian palynological assemblages were studied by using core data in Pengzhuang mine. According to the vertical distributions and abundance variation of miospore species in the strata, four palynological assemblages were recognized in ascending order, viz. Taiyuan formation:Laevigatosporites perminutus- Granulatisporites granulatus; Shanxi formation:Gulisporites cochlearius-Leiotriletes adnatus- Sinulatisporites sinensis;Shihezi formation: IApiculatisporites aculeatus-Gulisporites laevigatus-Macrotorispora minuta (Lower Shihezi Formation), IIPatellisporites meishanensis-Sinulatisporites sinensis-Florinites antiquus(Upper Shihezi Formation). Based on lithological features of the Carboniferous and Permian deposits in Pengzhuang mine, the coal-forming environments of that time, which is important for exploitation of coal resources, was reconstructed preliminarily. The coal forming environment in Pengzhuang mine is marine-terrigenous facies in Taiyuan Formation. From Shanxi Formation upward, coal-forming environment started to become transition facies composed mainly of delta plain.