Palynology of the Lower Permian Dazhuyuan and Liangshan Formations in Wuchuan-Zheng′an-Daozhen area,northern Guizhou Province
Shi Xiao1, Yu Jianxin1, Chen Bin2, Huang Cheng1, Gu Songzhu1, Li Hui1, Chi Hongfei1
1 State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences(Wuhan),Wuhan 430074,Hubei; 2 Faculty of Earth Sciences,China University of Geosciences(Wuhan),Wuhan 430074,Hubei
Abstract：The materials in this paper were collected from the Lower Permian Dazhuyuan and Liangshan Formations in Wuchuan-Zheng′an-Daozhen area,northern Guizhou Province. The sporo-pollen assemblages are diverse,abundant,and well preserved in Liangshan Formation,but conversed to those in Dazhuyuan Formation. The palynological characteristic of the mentioned Formations can be summarized as follows:(1)The miospore populations of the Dazhuyuan Formation contain examples of species such as abundant Calamospora and Florinites,a little Torispora verrucosa,Gulisporites,Alisporites,Hamiapollenites and Striatopodocarpites,mainly occurring in the Upper Carboniferous to Lower Permian. According to the stratigraphic position of the Dazhuyuan Formation and miospore collected,its age should be correspond to the Early Permian Asselian to Artinskian(equivalent to the Zisong-Longlin stage).(2)The Liangshan Formation contains miospores collectively named Laevigatosporites vulgaris-Gulisporites-Florinites ovalis assemblage. Compared with the preceding Dazhuyuan Formation,the vegetation became extremely diversified,as reflected by the numerous taxa of both pteridophytic spores and gymnospermous pollen-attaining to 49 species in 34 genera, and quantitatively to 51.6％～56.1％ and 43.9％～48.4％ respectively. Judging from the characteristic components of this assemblage,the Liangshan Formation is possibly correlated with Early Permian Longlinian of southern China(equivalent to the Kunguria Stage).
Shi Xiao,Yu Jianxin,Chen Bin et al. Palynology of the Lower Permian Dazhuyuan and Liangshan Formations in Wuchuan-Zheng′an-Daozhen area,northern Guizhou Province[J]. JOPC, 2014, 16(2): 217-226.
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