贵州兴义三叠纪兴义动物群化石层锆石 LA-ICP-MS U-Pb年龄及其意义
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本文为国家自然科学基金(编号:40920124002,41372016和41572008)、中国科学院南京地质古生物研究所现代古生物学与地层学国家重点实验室开放基金(编号:123102和143108)、高等学校博士学科点专项科研基金(编号:20120001110072 )资助项目的成果。


LA-ICP-MS Zircon U-Pb Age of the Fossil Layer of Triassic Xingyi Fauna from Xingyi, Guizhou, and Its Significance
Author:
  • LI Zhiguang

    LI Zhiguang

    1)Laboratory of Orogenic Belt and Crustal Evolution,Ministry of Education,and Department of Geology and Geological Museum,Peking University,Beijing,100871; 2)State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science),Nanjing,210008;
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  • SUN Zuoyu

    SUN Zuoyu

    1)Laboratory of Orogenic Belt and Crustal Evolution,Ministry of Education,and Department of Geology and Geological Museum,Peking University,Beijing,100871; 2)State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science),Nanjing,210008;
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  • JIANG Dayong

    JIANG Dayong

    1)Laboratory of Orogenic Belt and Crustal Evolution,Ministry of Education,and Department of Geology and Geological Museum,Peking University,Beijing,100871; 2)State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science),Nanjing,210008;
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  • JI Cheng

    JI Cheng

    Key Laboratory of Economic Stratigraphy and Palaeogeography,Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Nanjing,210008
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单位:
  • 1) 北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京,10087 ; 2) 中国科学院南京地质古生物研究所,现代古生物学与地层学国家重点实验室,南京,210008;    
  • 1) 北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京,10087 ; 2) 中国科学院南京地质古生物研究所,现代古生物学与地层学国家重点实验室,南京,210008;    
  • 1) 北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京,10087 ; 2) 中国科学院南京地质古生物研究所,现代古生物学与地层学国家重点实验室,南京,210008;    
  • 中国科学院南京地质古生物研究所,资源地层学与古地理学院重点实验室,南京,210008    
  • 1)Laboratory of Orogenic Belt and Crustal Evolution,Ministry of Education,and Department of Geology and Geological Museum,Peking University,Beijing,100871; 2)State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science),Nanjing,210008;    
  • 1)Laboratory of Orogenic Belt and Crustal Evolution,Ministry of Education,and Department of Geology and Geological Museum,Peking University,Beijing,100871; 2)State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science),Nanjing,210008;    
  • 1)Laboratory of Orogenic Belt and Crustal Evolution,Ministry of Education,and Department of Geology and Geological Museum,Peking University,Beijing,100871; 2)State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science),Nanjing,210008;    
  • Key Laboratory of Economic Stratigraphy and Palaeogeography,Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Nanjing,210008    
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    摘要:

    本文选取了产自贵州兴义富含海生爬行动物及鱼类化石的法郎组竹杆坡段上部凝灰岩夹层中的锆石,进行了LA-ICP-MS U-Pb年代学测定。测得兴义动物群化石赋存层位年龄为240.8±1.8 Ma,化石赋存层位之上21 m处年龄为239.8±1.7 Ma。该年龄数据进一步验证了兴义动物群的时代为中三叠世拉丁期,而非晚三叠世卡尼期,这一结论可与此前菊石生物地层研究、碳同位素分析的结果相印证。结合兴义动物群中生物组合面貌的变化,推测三叠纪生态系统可能在拉丁期就已开始由辐射发展阶段转变为完全复苏阶段。

    Abstract:

    Triassic Xingyi Fauna, from the Zhuganpo Member, Falang Formation, Xingyi City, Guizhou Province, southwest China, is famous for high diversity well preserved marine reptiles. The geological age of this fauna has been controversial for a long time. In this study, we focus on the isotopic dating of Xingyi Fauna.

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引用本文

李志广,孙作玉,江大勇,季承.2016.贵州兴义三叠纪兴义动物群化石层锆石 LA-ICP-MS U-Pb年龄及其意义[J].地质论评,62(3):779-790,[DOI].
LI Zhiguang, SUN Zuoyu, JIANG Dayong, JI Cheng.2016. LA-ICP-MS Zircon U-Pb Age of the Fossil Layer of Triassic Xingyi Fauna from Xingyi, Guizhou, and Its Significance[J]. Geological Review,62(3):779-790.

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历史
  • 收稿日期:2015-11-30
  • 最后修改日期:2016-04-16
  • 在线发布日期: 2016-05-19