Middle and Late Permian palynoflora in Tianshan Township,southeast of Bogda Mountain,Xinjiang,China  

作　　者：Muhammad I.Asghar ZHANG Shuqin ZHANG Minda SHI Xiao SUN Yuewu 

机构地区：[1]College of Earth Sciences,Jilin University,Changchun 130026,China [2]Research Center of Palaeontology and Stratigraphy,Jilin University,Changchun 130026,China

出　　处：《Global Geology》2021年第4期198-212,共15页世界地质（英文版）

基　　金：Supported by National Natural Science Foundation of China(No.31670215).

摘　　要：The Permian is one of the most important periods during which the vegetative earth witnessed the transition from icehouse to greenhouse climate and the global environment changes.Organisms on the planet encountered great challenge and the demise of swamp caused the extinction of arborescent lycopods and the rising of Mesophytic plants accomplished the floral transition from the Paleophytic to Mesophytic vegetation.In order to depict the climatic changes and floral succession in the middle and high latitudes of the North Hemisphere,palynological investigation was engaged,and 40 samples collected from the uppermost of Taerlang Formation,Hongyanchi Formation and Quanzijie Formation in the Tianshan Town,Turpan-Hami Basin,eastern Xinjiang,China.The result shows that the palynoflora in the studied area is composed of 50 species of 33 genera,dominated by disaccites and striatiti gymnosperm pollen,and characterized by diverse Protohaploxypinus,Hamia-pollenites,Alisporites and Klausipollenites.It is quite similar to those Middle and Late Permian palynological assemblages reported in the Dalongkou section and other localities in southern margin of Junggar Basin,and aged at Middle and Late Permian.The diversity of typical Angara and sub-Angara pollen,such as Falcisporites,Alisporites,Protohaploxypinus,Vittatina,Lunatisporites,Hamiapollenites,etc.indicates that the studied palynoflora belonged to the sub-Angara phytoprovince,while the presence of Lueckisporites virkkiae implied Euramerica pollen intruded northward sometimes.The paleoclimate of the studied area might be warm and humid with fluctuated dry seasons during the late Guadalupian and early Lopingian time.

关 键 词：GUADALUPIAN LOPINGIAN Turpan-Hami Basin PALYNOLOGY sub-Angara palynoflora Euramerica pollen 

分 类 号：Q914[天文地球—古生物学与地层学]