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A new SIMS zircon U–Pb date from the Ediacaran Doushantuo Formation: age constraint on the Weng'an biota


As a well-known phosphatized Lagerstätte, 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.

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G. H. Barfod , F. Albaréde , A. H. Knoll , S. Xiao , P. Télouk , R. Frei & J. Baker 2002. New Lu-Hf and Pb-Pb age constraints on the earliest animal fossils. Earth and Planetary Science Letters 201, 203–12.

D. Chen , W. Dong , B. Zhu & X. P. Chen 2004. Pb-Pb ages of Neoproterozoic Doushantuo phosphorites in South China: Constraints on early metazoan evolution and glaciation events. Precambrian Research 132, 123–32.

L. Chen , S. Xiao , K. Pang , C. Zhou & X. Yuan 2014a. Cell differentiation and germ-soma separation in Ediacaran animal embryo-like fossils. Nature 516 (7530), 238–41.

Y.-Q. Chen , S.-Y. Jiang , H.-F. Ling & J.-H. Yang 2009. Pb–Pb dating of black shales from the Lower Cambrian and Neoproterozoic strata, South China. Chemie der Erde - Geochemistry 69 (2), 183–9.

Z. Chen , C. Zhou , M. Meyer , K. Xiang , J. D. Schiffbauer , X. Yuan & S. Xiao 2013. Trace fossil evidence for Ediacaran bilaterian animals with complex behaviors. Precambrian Research 224, 690701.

D. Condon , M. Zhu , S. Bowring , W. Wang , A. Yang & Y. Jin 2005. U-Pb ages from the Neoproterozoic Doushantuo Formation, China. Science 308, 95–8.

J. P. Grotzinger , S. A. Bowring , B. Z. Saylor & A. J. Kaufman 1995. Biostratigraphic and geochronologic constraints on early animal evolution. Science 270, 598604.

J. W. Hagadorn , S. Xiao , P. C. J. Donoghue , S. Bengtson , N. J. Gostling , M. Pawlowska , E. C. Raff , R. A. Raff , F. R. Turner , C. Yin , C. Zhou , X. Yuan , M. B. McFeely , M. Stampanoni & K. H. Nealson 2006. Cellular and subcellular structure of Neoproterozoic animal embryos. Science 314, 291–4.

G. Jiang , X. Shi , S. Zhang , Y. Wang & S. Xiao 2011. Stratigraphy and paleogeography of the Ediacaran Doushantuo Formation (ca. 635-551 Ma) in South China. Gondwana Research 19 (4), 831–49.

A. H. Knoll , E. J. Javaux , D. Hewitt & P. Cohen 2006. Eukaryotic organisms in Proterozoic oceans. Philosophical Transactions of the Royal Society of London B: Biological Sciences 361 (1470), 1023–38.

E. Le Guerroué , P. A. Allen , A. Cozzi , J. L. Etienne & M. Fanning 2006. 50 Myr recovery from the largest negative δ13C excursion in the Ediacaran ocean. Terra Nova 18 (2), 147–53.

Q.-L. Li , X.-H. Li , Y. Liu , G.-Q. Tang , J.-H. Yang & W.-G. Zhu 2010. Precise U-Pb and Pb-Pb dating of Phanerozoic baddeleyite by SIMS with oxygen flooding technique. Journal of Analytical Atomic Spectrometry 25 (7), 1107–13.

X. Li , G. Tang , B. Gong , Y. Yang , K. Hou , Z. Hu , Q. Li , Y. Liu & W. Li 2013. Qinghu zircon: a working reference for microbeam analysis of U-Pb age and Hf and O isotopes. Chinese Science Bulletin 58 (36), 4647–54.

X.-H. Li , Y. Liu , Q.-L. Li , C.-H. Guo & K. R. Chamberlain 2009. Precise determination of Phanerozoic zircon Pb/Pb age by multicollector SIMS without external standardization. Geochemistry, Geophysics, Geosystems 10 (4), doi: 10.1029/2009GC002400.

P. Liu , S. Chen , M. Zhu , M. Li , C. Yin & X. Shang 2014. High-resolution biostratigraphic and chemostratigraphic data from the Chenjiayuanzi section of the Doushantuo Formation in the Yangtze Gorges area, South China: Implication for subdivision and global correlation of the Ediacaran System. Precambrian Research 249, 199214.

X. Liu , S. Gao , C. Diwu & W. Ling 2008. Precambrian crustal growth of Yangtze Craton as revealed by detrital zircon studies. American Journal of Science 308 (4), 421–68.

M. Lu , M. Zhu , J. Zhang , G. Shields-Zhou , G. Li , F. Zhao , X. Zhao & M. Zhao 2013. The DOUNCE event at the top of the Ediacaran Doushantuo Formation, South China: broad stratigraphic occurrence and non-diagenetic origin. Precambrian Research 225 (0), 86109.

M. W. Martin , D. V. Grazhdankin , S. A. Bowring , D. A. D. Evans , M. A. Fedonkin & J. L. Kirschvink 2000. Age of Neoproterozoic bilaterian body and trace fossils, White Sea, Russia: implications for metazoan evolution. Science 288, 841–5.

K. A. McFadden , J. Huang , X. Chu , G. Jiang , A. J. Kaufman , C. Zhou , X. Yuan & S. Xiao 2008. Pulsed oxidation and biological evolution in the Ediacaran Doushantuo Formation. Proceedings of the National Academy of Sciences 105 (9), 3197–202.

K. A. McFadden , S. Xiao , C. Zhou & M. Kowalewski 2009. Quantitative evaluation of the biostratigraphic distribution of acanthomorphic acritarchs in the Ediacaran Doushantuo Formation in the Yangtze Gorges area, South China. Precambrian Research 173 (1–4), 170–90.

G. M. Narbonne 2004. Modular construction of early Ediacaran complex life forms. Science 305, 1141–4.

J. Sláma , J. Košler , D. J. Condon , J. L. Crowley , A. Gerdes , J. M. Hanchar , M. S. A. Horstwood , G. A. Morris , L. Nasdala , N. Norberg , U. Schaltegger , B. Schoene , M. N. Tubrett & M. J. Whitehouse 2008. Plešovice zircon – A new natural reference material for U–Pb and Hf isotopic microanalysis. Chemical Geology 249 (1–2), 135.

J. S. Stacey & J. D. Kramers 1975. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth and Planetary Science Letters 26 (2), 207–21.

B. Wan , X. Yuan , Z. Chen , C. Guan , K. Pang , Q. Tang & S. Xiao 2016. Systematic description of putative animal fossils from the early Ediacaran Lantian Formation of South China. Palaeontology 59 (4), 515–32.

M. Wiedenbeck , P. Allé , F. Corfu , W. L. Griffin , M. Meier , F. Oberli , A. V. Quadt , J. C. Roddick & W. Spiegel 1995. Three natural zircon standards for U-Th-Pb, Lu-Hf, trace-element and REE analyses. Geostandards Newsletter 19 (1), 123.

S. Xiao & M. Laflamme 2008. On the eve of animal radiation: phylogeny, ecology and evolution of the Ediacara biota. Trends in Ecology and Evolution 24 (1), 3140.

S. Xiao , A. Muscente , L. Chen , C. Zhou , J. D. Schiffbauer , A. D. Wood , N. F. Polys & X. Yuan 2014a. The Weng'an biota and the Ediacaran radiation of multicellular eukaryotes. National Science Review 1, 498520.

S. Xiao , G. M. Narbonne , C. Zhou , M. Laflamme , D. V. Grazhdankin , M. Moczydłowska-Vidal & H. Cui 2016. Towards an Ediacaran time scale: problems, protocols, and prospects. Episodes, 39 (4), 540–55.

S. Xiao , C. Zhou , P. Liu , D. Wang & X. Yuan 2014b. Phosphatized acanthomorphic acritarchs and related microfossils from the Ediacaran Doushantuo Formation at Weng'an (South China) and their implications for biostratigraphic correlation. Journal of Paleontology 88 (1), 167.

X. Yuan , Z. Chen , S. Xiao , C. Zhou & H. Hua 2011. An early Ediacaran assemblage of macroscopic and morphologically differentiated eukaryotes. Nature 470 (7334), 390–93.

C. Zhou & S. Xiao 2007. Ediacaran d13C chemostratigraphy of South China. Chemical Geology 237, 89108.

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Geological Magazine
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