山东五图含煤岩系孢粉组合及其地层意义

对五图组含煤岩系进行研究 ,所揭示的孢粉植物群中 ,被子植物榆粉 (Dlmipollenites)和栎粉 (Quercoidites)有很高的含量 ,此外有山核桃粉 (Caryapollenites)、朴粉 (Celtipollenites)、枫杨粉 (Pterocaryapollenites)、胡桃粉(Juglanspollenites)、桦粉 (Betulaepollenites)、苗榆粉 (Ostryoipollenites)、枥粉 (Carpinipites)和小栗粉 (Cupuliferoipollenites)等 ,其中热带、亚热带分子占很大的比重 ,且有很高的分异度 ;裸子植物含量不高 ,主要为松粉(Pinuspollenites)和云杉粉 (Piceaepollenites) ,其次为杉粉 (Taxodiaceaepollenites)和麻黄粉 (Ephedripites) ;蕨类孢子一般含量较少 ,仅在部分样品中三角孢 (Deltoidospora)含量很高。在参考沉积、古气候、海平面变化以及其他门类化石资料的基础上 ,对孢粉化石群的时代归属及我国东部区域相关问题作了讨论 ,得出五图组孢粉组合特征与其他古生物资料所得的时代意见一致 ,属早始新世晚期到中始新世早期 ,其古气候特征也与全球海洋气候特征相符合。

EOCENE PALYNOSTRATIGRAPHY OF WUTU, SHANDONG AND ITS STRATIGRAPHICAL SIGNIFICANCE

The study of the development of the palynological flora from the Wutu Group reveals that in angiosperm there are Ulmipollenites, Quercoidites, Caryapollenites, Celtipollenites, Juglanspollenites, Betulaceoipollenites, Rutaceoipollenis and Rhoipites. The quantity and variety of the tropical and subtropical plants is very high. The quantity of the gymnosperm is not high, mainly Pinuspollenites and Piceaepollenites, also there are Taxodiaceaepollenites and Ephedripites. The quantity of Pteridophyte spore is very low, only in some sample the quantity of Deltoidospora is very high. On the basis of sediment, palaoclimate, the change of sea level and other fossils, it is known that the palynology assemblage of the Wutu Group belongs to late Early Eocene to early Middle Eocene. And its paleoclimate is consistent with the whole ocean climate character.