华南黄陵背斜西翼兴山地区乡儿湾剖面埃迪卡拉系陡山沱组微体化石  

Microfossils from the Ediacaran Doushantuo Formation at the Xiangerwan section of Xingshan area in the western flank of Huangling anticline,South China

作　　者：尚晓冬[1,2] 刘鹏举 张德军[1,3] 董进 杨犇 周元[4] SHANG Xiaodong;LIU Pengju;ZHANG Dejun;DONG Jin;YANG Ben;ZHOU Yuan(MNR Key Laboratory of Stratigraphy and Palaeontology,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology,CAS),Nanjing,Jiangsu 210008,China;Shenyang Center of Geological Survey,China Geological Survey,Shenyang,Liaoning 110034,China;Shaanxi China Mining Union Group Limited,Xi'an,Shaanxi 710054,China)

机构地区：[1]中国地质科学院地质研究所,自然资源部地层与古生物重点实验室,北京100037 [2]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,江苏南京210008 [3]中国地质调查局沈阳地质调查中心,辽宁沈阳110034 [4]陕西中矿联盟矿业有限公司,陕西西安710054

出　　处：《地质学报》2023年第12期4020-4034,共15页Acta Geologica Sinica

基　　金：中国地质调查局地质调查项目(编号DD20230221);国家自然科学基金项目(编号U2244202,41902019);现代古生物学和地层学国家重点实验室项目(编号213114,223117)联合资助的成果。

摘　　要：本文首次报道并描述了华南黄陵背斜西翼湖北宜昌兴山县乡儿湾剖面埃迪卡拉系陡山沱组二段中上部的燧石结核和条带中的疑源类微体化石,经系统鉴定共识别出8属8种,包括Appendisphaera grandis,Crassimembrana multitunica,Leiosphaeridia minutissima,Megasphaera inornata,Schizofusa zangwenlongii,Symphysosphaera basimembrana,Urasphaera nupta,Variomargosphaeridium gracile。该化石组合包含Liu Pengju and Moczyd?owska(2019)所建立的第二生物组合带(Tanarium tuberosum-Schizofusa zangwenlongii组合带)的特征分子Schizofusa zangwenlongii,因此,可尝试性地与第二生物组合带相对比,但未见黄陵背斜东南翼陡山沱组二段的常见属Tianzhushania,据此推测黄陵背斜两翼在古环境上可能有所差异。The acritarch microfossils arediscovered from the chert nodules and bands in the MemberⅡof the Ediacaran Doushantuo Formation at Xiangerwan section in the western flank of Huangling anticline in the Xingshan County of Yichang,Hubei Province,South China.They are represented taxonomically by 8 species of 8 genera,including Appendisphaera grandis,Crassimembrana multitunica,Leiosphaeridia minutissima,Megasphaera inornata,Schizofusa zangwenlongii,Symphysosphaera basimembrana,Urasphaera nupta,Variomargosphaeridium gracile.Since the existence of Schizofusa zangwenlongii,it might be tentatively correlated with the second assemblage zone(Tanarium tuberosum-Schizofusa zangwenlongii)proposed by Liu and Moczydłowska(2019).However,it does not contain genus Tianzhushania which is common in the MemberⅡof the Doushantuo Formation in the southeastern flank of Huangling anticline,there might exist environmental variations between the two flanks of the Huangling anticline.

关 键 词：三峡地区 埃迪卡拉纪 陡山沱组 微体化石 疑源类 

分 类 号：Q911.2[天文地球—古生物学与地层学] P548[生物学—古生物学]