换一批
换一批湖北宜昌真金和陈家河奥陶系牯牛潭组至宝塔组的牙形刺及其地层意义
ORDOVICIAN CONODONTS FROM THE KUNIUTAN TO PAGODA FORMATIONS AT CHENJIAHE AND ZHENJIN OF YICHANG,HUBEI PROVINCE,CHINA AND THEIR STRATIGRAPHIC SIGNIFICANCE
摘要根据采自湖北宜昌分乡陈家河和远安真金两剖面奥陶系牯牛潭组至宝塔组的牙形刺,将该段地层的牙形刺生物带自上而下综合划分为Hamarodus brevirameus,Amorphognathus superbus,Baltoniodus alobatus,Pygodus anserinus-Yangtzeplacognathus jianyeensis,Yangtzeplacognathus protoramosus,Yangtzeplacognathus foliaceus, Histiodella kristinae-Eoplacognathus suecicus,Dzikodus tablepointensis,Lenodus variabilis 和Lenodus antivariabilis等牙形刺生物带.其中宝塔组之Hamarodus brevirameus,Amorphognathus superbus 生物带及Baltoniodus alobatus生物带顶部归为凯迪阶(Katian),庙坡组Baltoniodus alobatus 生物带大部和Pygodus anserinus-Yangtzeplacognathus jianyeensis生物带中上部归为桑比阶(Sandbian),而牯牛潭组的Yangtzeplacognathus protoramosus至Lenodus antivariabilis等牙形刺生物带和庙坡组Pygodus anserinus-Yangtzeplacognathus jianyeensis生物带下部则归入达瑞威尔阶(Darriwillian).这一牙形刺带序列与宜昌黄花场和分乡剖面的牙形刺生物带相一致.
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关键词
牙形刺牯牛潭组宝塔组奥陶系宜昌真金陈家河湖北conodontKuniutan FormationPagoda FormationOrdovicianChenjiaheZhenjinYichangHubei ProvinceChin
发布时间
2018-08-27
基金项目
由国家基金委创新研究群体项目（41521061,41290260）；
中国科学院国际伙伴计划(SAFEA,20140491530)资助,这也是中国海相地层研究项目和IGCP 653项目"奥陶纪生物大辐射的启动过程"的阶段成果.甄勇毅的研究工作及该文的发表经澳大利亚新南威尔州地质调查所所长批准.This research was supported by the National Natural Science Foundation of China（41521061,41290260）；
Chinese Academy of Science( SAFEA No．20140491530)．This is a contribution to IGCP Project 653:the onset of the Great Ordovician Biodiversity Event．Zhen YY publishes with the permission of the Executive Director,Geological Survey of New South Wales．
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