张元动,詹仁斌,甄勇毅,方翔,张俊鹏

• 1: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创新中心现代古生物学和地层学国家重点实验室
• 2:中国科学院大学
• 3:Geological Survey of New South Wales
• 4: W.B.Clarke Geoscience Centre

摘要(Abstract)：

以统一的时间轴为标尺,本文对我国奥陶纪年代地层、生物地层、化学地层进行精确对比,同时对全球海平面、磁极性反转、古气候和生物多样性等长周期全球变化,以及奥陶纪重大生物和地质事件进行简要总结、讨论和梳理。在此基础上,指出我国应重点关注和聚焦以下若干科学问题:1)奥陶系底界问题;2)奥陶系"阶"的时限长短不均衡,有必要进行再划分;3)我国奥陶纪地层并不连续和完整,需要重新认识;4)追求更高精度的地层划分对比; 5)奥陶纪长周期变化及快速生物和地质事件的过程和发生机制。

关键词(KeyWords)： 奥陶系;划分对比;古气候;生物多样性;同位素定年;地质事件

Abstract:

Keywords:

基金项目(Foundation): 中国科学院先导专项B类(XDB26000000);; 国家自然科学基金(41772005、41802023、42002009);; 现代古生物学和地层学国家重点实验室(20201104)共同资助

作者(Author): 张元动,詹仁斌,甄勇毅,方翔,张俊鹏

DOI: 10.19839/j.cnki.dcxzz.2020.0042

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