摘要
本文首次报道了新疆准噶尔盆地东缘胜利沟中二叠世平地泉组植物化石11属19种和晚二叠世黄梁沟组植物化石7属9种,并结合前人对这一地区中—晚二叠世植物化石记录,讨论了两个植物群的地质时代。研究认为:中二叠世平地泉组植物群以安加拉植物群为主,混生个别欧美植物群分子;晚二叠世黄梁沟组植物群为混生少量华夏植物群分子的安加拉植物群。在此基础上,探讨了中—晚二叠世植物群演替、植被变化、植物群混生与中亚造山带板块聚合之间的关系,认为中二叠世的暖温带温湿气候在晚二叠世转变为季节性干热气候,准噶尔盆地东缘中—晚二叠世植物群混生与准噶尔—吐哈地块、塔里木板块、佳蒙地块、华北板块的拼合和古亚洲洋的关闭密切相关。
19 species of 11 genera in the Middle Permian Pingdiquan Formation and 9 species of 7 genera in the Upper Permian Huanglianggou Formation are reported for the first time at Shengligou,eastern Junggar basin,Xinjiang.Combined with the previous Middle and Late Permian fossil plants records at this locality,the geological ages of two floras are discussed,and the flora in the Pingdiquan Formation is characterized by numerous Angara-type plants mixed with a few Euramerican elements,while the Huanglianggou flora is marked by Angara-type plants mixed with several Cathaysian plants.Furthermore,the flora succession,vegetation change,mixing flora and the plate amalgamation in Central Asia orogenic belt are represented,and the results indicate that the Middle Permian warm temperate humid climate shifted to a hot seasonal dry climate during Late Permian.In addition,the succession of the Middle and Late Permian mixing floras in the eastern Junggar basin is closely related to the amalgamation of the Junggar-Tuha block,the Tarim plate,the Jiamusi-Mongolia block and the North China plate accompanied by the closure of the Paleo-Asian Ocean.
作者
黄睿
张颖
史骁
孙跃武
Huang Rui;Zhang Ying;Shi Xiao;Sun Yuewu(College of Earth Sciences,Jilin University,Changchun 130061,China;Research Center of Paleontology&Stratigraphy,Jilin University,Changchun 130026,China;International Centre for Geoscience Research and Education in Northeast Asia,Changchun 130026,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第2期403-417,共15页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(31670215)
中国地质调查局项目(DD201607170-YQ17W01)。
