一个含正型粉和山龙眼类孢粉组合时代的探讨

STUDY ON AGE OF A SPORO-POLLEN ASSEMBLAGE WITH NORMAPOLLES AND PRATEACEOUS

郝玉鸿 陈民敏

Hao Yuhong Chen Minmin

地质矿产部石油地质中心实验室

Central Laboratory of Petroleum Geology, Ministry of Geology and Minerals

据孢粉资料分析在晚白垩世的北半球即北纬40度以北地区,存在有二大植物区系。一是欧洲植物区,以正型粉(Norm apolles)为特征,其范围东起东径80度线,西止北大西洋沿岸。另一个是东西伯利亚植物区,以鹰粉(Aquilapollenites),山龙眼科(proteaceae),沃氏粉(Wodehouseia)为特征。

Informations provided in this paper were from the anhydrite-containing mud-stone in the upper Menli formation of the Sanmenxia basin. The assemblage studied here has a variety of Normapolles, such as Nu-dopollis, Basopollis, Complexiopollis, Plicapollis, Sporopollis, Vacuo-pollis, etc., containing abundant pollen of proteaceae of over ten kinds with a concentration of 13%. The flourishing and declining of proteaceae plants on the Northern Hemisphere were not consistent during geological history. They began to flourish in Maestrichtian-Danian in Siberia of Soviet Union and the pacific coastal area of North America and gradually extincted out in Paleocenc. During Paleocene, they were thriving in the long and narrow zone trending E-W from central China westward to central kazakhstan of Soviet Union. Four new species and genuses of Diervillopol-lenites magniatrium, Lonicerapollis arcuatus, Proteacidites pustulatus and Dipsacuspollenites sanmenxiaensis are given in this paper.

https://doi.org/10.11781/sysydz198304289