Early-Middle Permian palynoflora of Shandong Province,eastern North China

作者：Tian-Tao Yin,Shou-Jun Li,Xiang-Yu Zhang,Xiu-Li Zhao

摘要：The Permian Taiyuan and Shanxi formations exposed in Shandong Province,eastern North China,contain abundant spores and pollen.In this study,a total of 42 genera and 146 species of spores and pollen from these Permian formations,native to northern China,are identified and related to the three epochs of the Permian Period(Cisuralian,Guadalupian,and Lopingian Epochs)as two assemblages:Assemblage I—the Laevigatosporites-Granulatisporites assemblage,inferred as the Cisuralian(~298.9-272.9 Ma);and,Assemblage II—the Gulisporites-Sinulatisporites assemblage,inferred as the Guadalupian(~272.9-259.1 Ma).Assemblage I represents growing ferns,whereas Assemblage II represents gymnosperms.The assemblage division and analysis indicated that the palaeoclimate of the study area during Early-Middle Permian time was dominated by warm and humid conditions,and later in the Middle Permian changed into moderately dry conditions.

發文機構：College of Earth Science and Engineering China Chemical Geology and Mine Bureau Shandong Geological Prospecting Institute

關鍵詞：PERMIANSporesandpollenVegetationsuccessionPaleoclimateEnvironmentalchangeTaiyuanFormationShanxiFormation

分類號： F42[經濟管理—產業經濟]