西藏南部聂拉木地区晚泥盆世—早石炭世的介形类  

LATE DEVONIAN–EARLY CARBONIFEROUS OSTRACODS IN NYALAM,SOUTHERN TIBET, CHINA

作　　者：宋俊俊 郭文 张以春[1,2,3] 马娟 孙语聪[4] 郄文昆 SONG Junjun;GUO Wen;ZHANG Yichun;MA Juan;SUN Yucong;QIE Wenkun(Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China;CAS Key Laboratory of Economic Stratigraphy and Palaeogeography,Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment,Chinese Academy of Sciences,Nanjing 210008,China;University of Chinese Academy of Sciences,Nanjing College,Nanjing 211135,China;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074)

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]中国科学院南京地质古生物研究所和生物演化与环境卓越中心,现代古生物学和地层学国家重点实验室,南京210008 [3]中国科学院大学南京学院,南京210049 [4]中国地质大学生物地质与环境地质国家重点实验室,武汉430074

出　　处：《微体古生物学报》2022年第1期40-56,共17页Acta Micropalaeontologica Sinica

基　　金：第二次青藏高原综合科学考察研究(2019QZKK0706);国家自然科学基金重大研究计划重点项目(91855205);青年基金(41802002);中国科学院战略性先导科技专项B类项目(XDB26000000)联合资助。

摘　　要：本文系统描述西藏南部聂拉木地区晚泥盆世–早石炭世介形类共计15属24种。根据介形类的组合面貌及孢子、牙形刺的研究结果推断,亚里剖面上的亚里组时代为晚泥盆世–早石炭世,泥盆系-石炭系界线(D-CB)大致位于亚里东沟段顶部至沟陇日段。亚里组产出的介形类生态组合属于光滑速足目集群或艾菲尔生态型,指示亚里组在沉积时为远岸浅水沉积环境,且在上部腊扎蒲段水深变浅。亚里组介形类面貌与华南泥盆纪介形类相似程度高,与俄罗斯和欧美地区也有相似的属种,说明泥盆纪-石炭纪之交介形类的地理隔离并不显著,在各个板块之间有属种交流的可能。Ostracods of the Late Devonian–Early Carboniferous are described from Nyalam, southern Xizang(Tibet),China. 24 species belonging to 15 genera are identified and figured from the Yali Formation in the Yali section. The ostracod fauna suggests an age close to the Devonian-Carboniferous boundary for the Yali Formation and the boundary may exist between the top of the Yalidonggou Member and the Goulongri Member. The ecological assemblage of ostracods fauna belongs to the smooth-Podocopid association(i.e., Eifelian Mega-Assemblage), which implies an offshore environment for the Yali Formation and becoming shallower in the upper part of the formation. Ostracods from the Yali Formation show a high similarity to the Devonian taxa from South China and they are also comparable to the ostracod faunas from Russian, Europe and North America, which implies that ostracods experienced faunal exchanges between peri-Gondwana and Laurentia–Baltica during the Late Devonian–Early Carboniferous.

关 键 词：介形类 泥盆-石炭系界线 古生态 生物古地理 西藏自治区 

分 类 号：Q915[天文地球—古生物学与地层学]