| 湖北宜昌黄花场下奥陶统弗洛阶上部牙形刺生物地层分带及对比 |
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| 引用本文： | 李志宏 陈孝红 王传尚,曾庆銮 汪啸风 Stouge S..湖北宜昌黄花场下奥陶统弗洛阶上部牙形刺生物地层分带及对比[J].中国地质,2010,37(6):1647-1058. |
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| 作者姓名： | 李志宏 陈孝红 王传尚 曾庆銮 汪啸风 Stouge S. |
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| 作者单位： | 武汉地质矿产研究所;Geological Museum University of Copenhagen 1350 фster Volgade5-7 Copenhagen K;Denmark; |
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| 基金项目： | 中国地质调查局，中国地质调查局1:5万分乡幅区域地质调查项目，中国地质调查局地质大调查项目 |
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| 摘 要： | 在宜昌黄花场剖面弗洛期原Oepikodus evae带牙形刺生物地层系统研究的基础上,笔者等讨论了Stolodus stola,L.gladiatus,O.intermedius,Oepikodus communis,Prioniodus honghuayuanensis等重要的多分子器官种分类问题。认为Oepikodus evae带上部时限范围内并未见Oepikodus evae分子,所以与国际地层指南(2000)关于间隔带和延限带的含义相悖。本文通过对黄花场剖面牙形刺样品补充采样、系统检查和厘定原O.evae带内一些牙形石属种分类,分析了牙形刺垂向分布特征。厘定了原Stolodus stola亚带的首现层位,修订了原Oepikodus evae带的含义。在此基础上,以牙形刺带分子首现为标志,将红花园组上部—大湾组下段自下而上划分为4个间隔带和3个亚带。其中4个间隔带为:Prioniodus honghuayuanensis带,O.evae带,Trapezognathus diprion带和Baltoniodus cf.B.triangularis带。其中Prioniodushonghuayuanensis带,Trapezognathus diprion带,Baltoniodus cf.B.triangularis带为新建化石带。并在Trapezognathus diprion和Baltoniodus cf.B.triangularis带时限范围内划分3个亚带:Stolodus stola亚带,Oepikodus intermedius亚带,Microzkodina sp.A.亚带;其中Oepikodus intermedius亚带,Microzkodina sp.A.亚带为新建亚带。由于黄花场剖面中Trapezognathus diprion带-Baltoniodus cf.B.triangularis带时限范围内发现丰富的Reutterodus andinus,Oepikodus intermedius,Juanognathus variabilis等暖水型牙形刺,故此这两个间隔带可为北美中大陆地区同期地层划分对比提供良好的标准。这一划分方案也为进行洲际间不同生物地理分区的精细地层划分对比提供了详实的资料。
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| 关 键 词： | 下奥陶统弗洛阶 牙形刺分带 地层对比 黄花场剖面 湖北宜昌 |
Conodont zonation and correlation of upper part of Fuluoian of Lower Ordovician in Huanghuachang section,Yichang, Hubei |
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| LI Zhi-Hong,CHEN Xiao-Hong,WANG Chuan-Shang,Zeng Qing-luan,WANG Xiao-Feng,Stouge S..Conodont zonation and correlation of upper part of Fuluoian of Lower Ordovician in Huanghuachang section,Yichang, Hubei[J].Chinese Geology,2010,37(6):1647-1058. |
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| Authors: | LI Zhi-Hong CHEN Xiao-Hong WANG Chuan-Shang Zeng Qing-luan WANG Xiao-Feng Stouge S |
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| Abstract: | Based on a systematic study of the conodont biostratigraphic data in the former Oepikodus evae zone of the Fuluoian in the Huanghuachang section,the authors discussed several problems concerning the apparatus classification of some important multi-element conodonts: Stolodus stola,L.gladiatus,O.intermedius,Oepikodus communis,Prioniodus honghuayuanensis.The upper part of the former Oepikodus evae zone,without the zonal index fossil Oepikodus evae itself in the Huanghuachang section,conflicts with the definit... |
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| Keywords: | Fuluoian Lower Ordovicion conodont zone stratigraphic division and correlation Huanghuachang section Yichang |
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