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学科主题: Geosciences, Multidisciplinary
题名: Pb-Pb ages of Neoproterozoic Doushantuo phosphorites in South China: constraints on early metazoan evolution and glaciation events
作者: Chen, DF ; Dong, WQ ; Zhu, BQ ; Chen, XP
通讯作者: cdf@gig.ac.cn
关键词: Pb-Pb isochron age ; Doushantuo formation ; Weng' an fauna ; glaciations ; terminal neoproterozic ; phosphorite
刊名: PRECAMBRIAN RESEARCH
发表日期: 2004
卷: 132, 期:40545, 页:123-132
收录类别: sci
部门归属: Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510640, Peoples R China; Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA
项目归属: 海洋地质
摘要: The Pb-Pb isochron ages of 576 +/- 14 Ma for the upper part of the Upper Phosphorite Bed (UPB, this study) and 599 +/- 4 Ma for the lower part of the UPB [Earth Planet. Sci. Lett. 201 (2002) 203] in the Doushantuo Formation in the Weng'an area, South China, suggest that the deposition of the UPB lasted at least 5 Ma, and indicate that the observed microfossil assemblage (animal remains, multicellular algae, and giant process-bearing acritarchs) in the Doushantuo Formation predates all well-dated diverse Ediacaran assemblages and represents the earlier paleontological record of eukaryotes radiation on Earth. The 576 +/- 14 Ma age in the upper part of the UPB approximates the age of a negative delta(13)C excursion near the boundary between the Doushantuo and the overlying Dengying Formation if the Doushantuo-Dengying boundary at the Weng'an area is equivalent to that in the Yangtze Gorges area. This negative excursion might correlate to a post-Marinoan glaciation in South China, suggesting that the ice age following Doushantuo sediment deposition is younger than 590 Ma. The 599 +/- 4 Ma age in the lower part of the UPB [Earth Planet. Sci. Lett. 201 (2002) 203] represents the minimum age of the Nantuo diamictites, which are generally correlated with the Marinoan glaciation. (C) 2004 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000221988900006
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4804
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Chen, DF; Dong, WQ; Zhu, BQ; Chen, XP.Pb-Pb ages of Neoproterozoic Doushantuo phosphorites in South China: constraints on early metazoan evolution and glaciation events,PRECAMBRIAN RESEARCH,2004,132(40545):123-132
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