【摘要】 本文根据孢粉资料将豫西潭头盆地古新世—始新世划分为三个孢粉组合,自下而上为:第一组合(大章组) 以各种榆科花粉含量丰富和山龙眼类花粉突出为特征。时代为晚古新世,气候干热。第二组合(潭头组下部) 以出现多种多样三沟、三孔沟花粉为特征。时代为早始新世,气候湿热。第三组合(潭头组上部) 以含丰富的具囊松柏类花粉和出现一定数量的鹰粉为特征。时代为早、中始新世,气候温湿。根据孢粉组合特征,可以认为本区早第三纪植物群在整个早第三纪植物地理区中具有东西部过渡植物群的特征。文中还讨论了我国早第三纪中鹰粉(Aquilapoll.granobaculus)的分布及其地层意义,并提出分布在我国早第三纪的这类花粉决非是再沉积的。同时,提出了一些对划分古新统与始新统界限有一定意义的孢粉类型。更多还原

【Abstract】 On the basis of palynological data the Paleocene-Eocene palynoflora from the Tantou Basin in west Henan are divided into three sporo-pollen assemblages. They are given in ascending order as follows: 1.The first assemblage (Dazhang Formation) characterized mainly by the pre- dominance of palynoforms of Ulmaceae and various Protcaceous pollen,being assigned to Late Paleocene and indicating a dry-hot climate。2.The second assemblage (Lower part of the Tantou Formation) marked by the presence of various Triporopollenites and Tricolporopollenites,belonging to the Early Eocene.A moist-hot climate is ref- lected.3.The third assemblage (the Upper part of the Tantou Formation) represented by aboundant pollen grains of saccated elements (consisting of Pinaceae and Podocar- paceae) and the occurrence of Aquilapollnites pollen which plays an important part in this assemblage.It is interpreted as belonging to the middle to early Eocene.Tile climate was moist and warm. As indicated by the sporo-pollen assemblage the present Paleocene to Eocene flora in the whole phytoprovicnce may belong to a flora transitional from western to eastern China.In this paper the distribution of Aquilapollenites pollen and its stratigraphi- cal significance are also discussed and it is considered that this kind of pollen distribu- ted in the Paleocene of China is certainly not redeposited.At the same time,some pa- lynoforms of certain significance for delimitation of Paleocene and Eocene are pro- vided.更多还原