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Calibrating the temporal and spatial dynamics of the Ediacaran - Cambrian radiation of animals

Bowyer, Fred T.1,2; Zhuravlev, Andrey Yu3; Wood, Rachel2; Shields, Graham A.4; Zhou, Ying4; Curtis, Andrew2; Poulton, Simon W.1; Condon, Daniel J.5; Yang, Chuan5; Zhu, Maoyan(朱茂炎)6,7,8
2022-02-01
发表期刊EARTH-SCIENCE REVIEWS
ISSN0012-8252
卷号225页码:24
摘要

The Ediacaran-Cambrian transition, which incorporates the radiation of animals, lacks a robust global temporal and spatial framework, resulting in major uncertainty in the evolutionary dynamics of this critical radiation and its relationship to changes in palaeoenvironmental geochemistry. We first present a new delta C-13(carb) composite reference curve for the Ediacaran Nama Group of southern Namibia, and we then outline four new possible global age models (A to D) for the interval 551-517 million years ago (Ma). These models comprise composite carbonate-carbon isotope (delta C-13(carb)) curves, which are anchored to radiometric ages and consistent with stron-tium isotope chemostratigraphy, and are used to calibrate metazoan distribution in space and time. These models differ most prominently in the temporal position of the basal Cambrian negative delta(13)C(carb & nbsp;)excursion (BACE). Regions that host the most complete records show that the BACE nadir always predates the Ediacaran-Cambrian boundary as defined by the first appearance datum (FAD) of the ichnospecies Treptichnus pedum. Whilst trep-tichnid traces are present in the late Ediacaran fossil record, the FAD of the ichnospecies T. pedum appears to post-date the last appearance datums (LADs) of in situ representatives of the skeletal organisms Cloudina and Namacalathus in all environments with high-resolution delta C-13(carb & nbsp;) data. Two age models (A and B) place the BACE within the Ediacaran, and yield an age of ~538.8 Ma for the Ediacaran-Cambrian boundary; however models C and D appear to be the most parsimonious and may support a recalibration of the boundary age by up to 3 Myr younger. All age models reveal a previously underappreciated degree of variability in the terminal Ediacaran, incorporating notable positive and negative excursions that precede the BACE. Nothwithstanding remaining uncertainties in chemostratigraphic correlation, all models support a pre-BACE first appearance of Cambrian-type shelly fossils in Siberia and possibly South China, and show that the Ediacaran-Cambrian transition was a protracted interval represented by a series of successive radiations.

关键词Ediacaran Cambrian Evolution Chronostratigraphy Biostratigraphy Chemostratigraphy Carbon isotopes Strontium isotopes Temporal calibration Geochronology
DOI10.1016/j.earscirev.2021.103913
收录类别SCI
语种英语
关键词[WOS]YANGTZE GORGES AREA ; SOUTH CHINA ; CARBON-ISOTOPE ; GEOCHRONOLOGICAL CONSTRAINTS ; FOSSIL ASSEMBLAGES ; GLOBAL CORRELATION ; INTEGRATED CARBON ; LANTIAN FORMATION ; OLENEK UPLIFT ; CHEMOSTRATIGRAPHY
资助项目NERC-NSFC Biosphere Evolution Transitions and Resilience (BETR) programme[NE/P013643/1] ; NERC-NSFC Biosphere Evolution Transitions and Resilience (BETR) programme[NSFC/41661134048] ; Chinese Academy of Sciences[XDB18000000] ; Chinese Academy of Sciences[XDB 26000000] ; NERC[NE/R010129/1] ; NERC[NE/T008458/1] ; NERC[121031600198-2] ; Royal Society Wolfson Research Merit Award ; State Order of the Government of the Russian Federation[04-1-21]
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000786957000002
项目资助者NERC-NSFC Biosphere Evolution Transitions and Resilience (BETR) programme ; Chinese Academy of Sciences ; NERC ; Royal Society Wolfson Research Merit Award ; State Order of the Government of the Russian Federation
出版者ELSEVIER
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/40738
专题中国科学院南京地质古生物研究所
通讯作者Bowyer, Fred T.
作者单位1.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
2.Univ Edinburgh, Sch GeoSci, James Hutton Rd, Edinburgh EH9 3FE, Midlothian, Scotland
3.Lomonosov Moscow State Univ, Fac Biol, Dept Biol Evolut, Leninskie Gory 1 12, Moscow 119234, Russia
4.UCL, Dept Earth Sci, Gower St, London WC1E 6BT, England
5.British Geol Survey, Keyworth NG12 5GG, Notts, England
6.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
7.Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironm, Nanjing 210008, Peoples R China
8.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 10049, Peoples R China
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Bowyer, Fred T.,Zhuravlev, Andrey Yu,Wood, Rachel,et al.

Calibrating the temporal and spatial dynamics of the Ediacaran - Cambrian radiation of animals

[J]. EARTH-SCIENCE REVIEWS,2022,225:24.
APA Bowyer, Fred T..,Zhuravlev, Andrey Yu.,Wood, Rachel.,Shields, Graham A..,Zhou, Ying.,...&Zhu, Maoyan.(2022).

Calibrating the temporal and spatial dynamics of the Ediacaran - Cambrian radiation of animals

.EARTH-SCIENCE REVIEWS,225,24.
MLA Bowyer, Fred T.,et al."

Calibrating the temporal and spatial dynamics of the Ediacaran - Cambrian radiation of animals

".EARTH-SCIENCE REVIEWS 225(2022):24.
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