华南伊迪卡拉(震旦)系年代地层划分方案及其层型剖面
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1.中国地质科学院地质研究所、中国地质大学(北京)地球科学与资源学院;2.中国地质科学院地质研究所;3.沈阳师范大学古生物学院;4.贵州省地质工程勘察设计研究院;5.河南理工大学资源环境学院;6.中国地质调查局昆明自然资源综合调查中心;7.贵州省地质调查院;8.贵州大学资环学院;9.云南省玉溪师范学院;10.云南省地质调查局

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中国地质调查局地质调查项目(DD20221645,DD20221648)和,国家自然科学基金项目(面上项目,重点项目,重大项目)


Chronostratigraphic Units and its Stratotype Sections of the Ediacaran (Sinian) of South China
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1.Institute of Geology,Chinese Academy of Geological Sciences;2.School of Earth Sciences and Resources,China University of Geosciences (Beijing);3.College of Paleontology,Shenyang Normal University;4.Guizhou Bureau of Geology and Mineral Resources,111 Geological Brigade;5.School of Resources and Environment,Henan Polytechnic University;6.Kunming Natural Resources Comprehensive Investigation Center,China Geological Survey;7.Geological Survey of Guizhou Province;8.College of Resources and Environmental Engineering,Guizhou University;9.Yuxi Normal University;10.Yunnan Bureau of Geological Survey

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    摘要:

    依据华南峡东标准剖面的地球化学和多重地层划分对比资料,2014年全国地层委员会发布了伊迪卡拉(震旦)系年代地层划分暂定方案。该方案近年来已经受到来自新、老生物地层和同位素地质年代学研究所获得的新成果、新认识的挑战,迫切需要推出新的具体划分方案,建立新的阶一级层型剖面,作为华南乃至全国伊迪卡拉系对比划分的标准。为此,本文建议在伊迪卡拉纪以生物地层学为主的年代地层单元划分标准,提出在华南分别建立伊迪卡拉系上统和下统的顶阶层型剖面,即江川阶和翁会阶。本文推介了这两阶的相关顶、底界线层型剖面及标志化石、推测年龄和内部细分的化石带;其次初步设计了新的伊迪卡拉纪、统、阶年代地层格架(地层柱),提议待定的上、下统及其余各阶名称,指明今后重点工作、细致研究的层型剖面和对比区域。

    Abstract:

    Based primarily on the geochemical and multiple stratigraphic correlation data from the standard section in the eastern Yangtze Gorges, SW China, the National Stratigraphic Commission (NSC) published a provisional division scheme of the Ediacaran (Sinian) System in 2014. In recent years, this scheme has been challenged by new achievements and understandings from studies in past and current biostratigraphy and isotope geochronology. It is thus imperative to propose a new, more precise division scheme and establish new stage-ranking stratotype sections in order to serve as the standard for future nationwide comparisons of the Ediacaran System, particularly in South China. In light of this, this paper suggests the establishment of top-stage stratotype sections of upper and lower strata for the Ediacaran Series in South China, namely the Jiangchuan Stage and the Wenghui Stage. Firstly, it recommends adopting a biogeological criterion as the primary basis for the biostratigraphic division of the Ediacaran Period. It also suggests the characteristic top and bottom boundary stratotype sections, key fossils, inferred ages, and internal subdivisions for these two stages. Secondly, a preliminary Ediacaran system-stage chronostratigraphic framework (stratigraphic column) is proposed, which includes the tentative names of subdivisions for the upper and lower series as well as other stages, thereby indicating the focus of future work and detailed investigations regarding stratotype sections and comparison regions.

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  • 收稿日期:2023-12-18
  • 最后修改日期:2023-12-25
  • 录用日期:2023-12-27
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