| 浙江桐庐县刘家奥陶纪剖面生物地层学初步研究 |
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| 引用本文： | 张元动,张举,汪建国,宋妍妍,汪隆武,俞国华,黎康清.浙江桐庐县刘家奥陶纪剖面生物地层学初步研究[J].地层学杂志,2012(1):1-12. |
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| 作者姓名： | 张元动 张举 汪建国 宋妍妍 汪隆武 俞国华 黎康清 |
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| 作者单位： | 中国科学院南京地质古生物研究所,现代古生物学和地层学国家重点实验室;浙江省地质调查研究院 |
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| 基金项目： | 自然科学基金(No.41172034);国家科技重大专项任务(2011ZX05008-001)支持 |
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| 摘 要： | 新发现的浙江桐庐刘家剖面位于马金一乌镇断裂与球川一萧山断裂之间，是浙西北地区以碎屑岩沉积为主的代表性奥陶纪地层剖面。根据所获得的宁国组和胡乐组的笔石化石，初步建立了该层段的笔石生物地层序列，自下而上包括Tetragraptusapproximatus带、Corymbograptusdeflexus带、Azygograp...
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| 关 键 词： | 生物地层 笔石 宁国组 奥陶系 桐庐 浙江 |
PRELIMINARY REPORT ON THE ORDOVICIAN BIOSTRATIGAPHY OF THE LIUJIA SECTION,TONGLU,ZHEJIANG PROVINCE |
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| ZHANG Yuan-dong,ZHANG Ju,WANG Jian-guo,SONG Yan-yan,WANG Long-wu,YU Guo-hua,and LI Kang-qing.PRELIMINARY REPORT ON THE ORDOVICIAN BIOSTRATIGAPHY OF THE LIUJIA SECTION,TONGLU,ZHEJIANG PROVINCE[J].Journal of Stratigraphy,2012(1):1-12. |
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| Authors: | ZHANG Yuan-dong ZHANG Ju WANG Jian-guo SONG Yan-yan WANG Long-wu YU Guo-hua and LI Kang-qing |
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| Institution: | 1) LPS,Nanjing Institute of Geology and Palaeontology,Nanjing 210008;2)Zhejiang Institute of Geological Institute,Xiaoshan 311200 |
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| Abstract: | The Liujia section in Tonglu County,discovered in recent years,is located between the Majin-Wuzhen and Qiuchuan-Xiaoshan fault zones,and is one of the few Ordovician representative sections in Northwest Zhejiang.The section includes in ascending order the Yinchufu,Ningkuo,Hulo,Yenwashan,Huangnekang and Changwu formations,and is dominated by fine siliciclastics deposits.Based on the graptolites assemblage from the Ningkuo and Hulo formations,eight graptolite zones are preliminarily recognized,these are,in ascending order,the Tetragraptus approximates Zone,Corymbograptus deflexus Zone,Azygograptus suecicus Zone,Exigraptus clavus Zone,Undulograptus austrodentatus Zone,Acrograptus ellesae Zone,Dicellograptus vagus Zone and Nemagraptus gracilis Zone.A few conodont species were also discovered from a basal limestone lens of the Ningkuo Formation,and they indicate an age of latest Tremadocian to earliest Floian,consisitent with graptolite biostratigraphy.Some large sponges were found in the lower part(dark gray shale,upper Floian) of the Ningkuo Formation.These are the first known sponge fissils from equivalent strata in China,and they offer new insights into the palaeoecology,palaeobiogeography,and evolutionary palaeobiology of the Ningkuo Formation.The Dicellograptus vagus Zone was provisionally adopted to refer to the topmost Darriwilian interval based on the occurrences of the eponymous species,and can be correlated with its equivalents in northwestern Tarim and Oslo region of Scandinavia. |
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| Keywords: | biostratigraphy graptolite Ordovician Liujia section Tonglu Zhejiang |
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