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A new SIMS zircon U-Pb date from the Ediacaran Doushantuo Formation: age constraint on the Weng'an biota
Chuanming Zhou (周传明); Xian-Hua Li; Shuhai Xiao; Zhongwu Lan; Qing Ouyang (欧阳晴); Chengguo Guan (关成国); Zhe Chen (陈哲)
2017-11
Source PublicationGeological Magazine
ISSN0016-7568
Volume154Issue:6Pages:1193-1201
Abstract

As a well-known phosphatized Lagerstatte, the Ediacaran Weng'an biota in central Guizhou Province of South China contains diverse acanthomorphic acritarchs, algal thalli, tubular microfossils as well as various spheroidal fossils. These fossils provide crucial palaeontological evidence for the radiation of multicellular eukaryotes after the termination of the Neoproterozoic global glaciation. While the Weng'an biota is generally considered as early Ediacaran in age on the basis of phosphorite Pb-Pb isochron ages ranging from 572 Ma to 599 Ma, the reliability and accuracy of these age data have been questioned and some geologists have proposed that the Weng'an biota may be younger than 580 Ma instead. Here we report a SIMS zircon U-Pb age of 609 +/- 5 Ma for a tuffaceous bed immediately above the upper phosphorite unit in the Doushantuo Formation at Zhangcunping, Yichang, South China. Litho-, bio- and chemostratigraphic correlations suggest that the upper phosphorite unit at Zhangcunping can be well correlated with the upper phosphorite unit at Weng'an, which is the main horizon of the Weng'an biota. We therefore conclude that the Weng'an biota could be as old as 609 +/- 5 Ma.

KeywordPhosphatized Lagerstatte Lithostratigraphic And Biostratigraphic Correlation Tuffaceous Bed Zhangcunping South China
DOI10.1017/S0016756816001175
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000413978800002
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/14052
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorChuanming Zhou (周传明)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, CAS Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China;
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China;
3.Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Chuanming Zhou ,Xian-Hua Li,Shuhai Xiao,et al. A new SIMS zircon U-Pb date from the Ediacaran Doushantuo Formation: age constraint on the Weng'an biota[J]. Geological Magazine,2017,154(6):1193-1201.
APA Chuanming Zhou .,Xian-Hua Li.,Shuhai Xiao.,Zhongwu Lan.,Qing Ouyang .,...&Zhe Chen .(2017).A new SIMS zircon U-Pb date from the Ediacaran Doushantuo Formation: age constraint on the Weng'an biota.Geological Magazine,154(6),1193-1201.
MLA Chuanming Zhou ,et al."A new SIMS zircon U-Pb date from the Ediacaran Doushantuo Formation: age constraint on the Weng'an biota".Geological Magazine 154.6(2017):1193-1201.
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