【摘要】 对内蒙古海拉尔盆地贝尔凹陷贝32井南屯地层中的孢粉化石进行了系统研究,自下而上建立了2个孢粉化石组合。Piceaepollenites云杉粉-Pinuspollenites双束松粉-Abietineaepollenites单束松粉组合,分布于南屯组一段;Concentrisporites同心粉-Piceaepollenites云杉粉-Pinuspollenites双束松粉组合,分布于南屯组二段。根据孢粉化石组合中Cicatricosisporites,Densoisporites,Triporoletes,Pilosisporites等重要分子的地质时限特征,认为南屯组地质时代为早白垩世Aptian—Albian。这些孢粉化石资料对建立海拉尔盆地地层层序,而指导盆地油气勘探具有十分重要的理论和现实意义。更多还原

【Abstract】 Form bottom to top,the Nantun Formation may be divided into two sporopollen assemblages. The Piceaepollenites sp.-Pinuspollenites sp.-Abietineaepollenites sp. is distributed in the first member of the Nantun Formation, whereas Concentrisporites sp.-Piceaepollenites sp.-Pinuspollenites sp. assemblage lies in the second member of Nantun Formation. Among the pteridophytic components,most genera of pteridophytic spores bear strong aspects of Early Cretaceous,such as Cicatricosisporites, Densoisporites,Triporoletes, and Pilosisporites. The Nantun Formation is thus considered to be Aptian-Albian in age, and it is important in reconstructing the stratigraphic sequence and guiding the exploration of the Hailar Basin where a lots of sporopollen fossils have been discovered.更多还原