Pulsed oxidation and bioloical evolution in the Ediacaran Doushantuo Formation

doi:10.1073/pnas.0708336105

	Pulsed oxidation and bioloical evolution in the Ediacaran Doushantuo Formation
	McFadden, Kathleen A.2; Huang, Jing 1; Chu, Xuelei 1; Jiang, Ganqing 3; Kaufman, Alan J.4; Zhou, Chuanming 5; Yuan, Xunlai 5; Xiao, Shuhai 2
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2008-03-04
卷号	105 期号:9 页码:3197-3202
关键词	acritarchs isotopes redox neoproterozoic early animals
ISSN号	0027-8424
DOI	10.1073/pnas.0708336105
文献子类	Article
英文摘要	Recent geochemical data from Oman, Newfoundland, and the western United States suggest that long-term oxidation of Ediacaran oceans resulted in progressive depletion of a large dissolved organic carbon (DOC) reservoir and potentially triggered the radiation of acanthomorphic acritarchs, algae, macroscopic Ediacara organisms, and, subsequently, motile bilaterian animals. However, the hypothesized coupling between ocean oxidation and evolution is contingent on the reliability of continuous geochemical and paleontological data in individual sections and of intercontinental correlations. Here we report high-resolution geochemical data from the fossil-rich Doushantuo Formation (635-551 Ma) in South China that confirm trends from other broadly equivalent sections and highlight key features that have not been observed in most sections or have received little attention. First, samples from the lower Doushantuo Formation are characterized by remarkably stable delta C-13(org) (carbon isotope composition of organic carbon) values but variable delta S-34(CAS) (sulfur isotope composition of carbonate-associated sulfate) values, which are consistent with a large isotopically buffered DOC reservoir and relatively low sulfate concentrations. Second, there are three profound negative delta C-13(carb) (carbon isotope composition of carbonate) excursions in the Ediacaran Period. The negative delta C-13(carb) excursions in the middle and upper Doushantuo Formation record pulsed oxidation of the deep oceanic DOC reservoir. The oxidation events appear to be coupled with eukaryote diversity in the Doushantuo basin. Comparison with other early Ediacaran basins suggests spatial heterogeneity of eukaryote distribution and redox conditions. We hypothesize that the distribution of early Ediacaran eukaryotes likely tracked redox conditions and that only after approximate to 551 Ma (when Ediacaran oceans were pervasively oxidized) did evolution of oxygen-requiring taxa reach global distribution.
WOS关键词	SOUTH CHINA ; YANGTZE PLATFORM ; ISOTOPE ANOMALIES ; CAP CARBONATES ; MARINE SULFATE ; DEATH-VALLEY ; SULFUR ; SEAWATER ; FOSSILS ; OCEAN
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATL ACAD SCIENCES
WOS记录号	WOS:000253846500007
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/70116]
专题	中国科学院地质与地球物理研究所
通讯作者	Chu, Xuelei
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA 3.Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA 4.Univ Maryland, Dept Geol, College Pk, MD 20742 USA 5.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	McFadden, Kathleen A.,Huang, Jing,Chu, Xuelei,et al. Pulsed oxidation and bioloical evolution in the Ediacaran Doushantuo Formation[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2008,105(9):3197-3202.
APA	McFadden, Kathleen A..,Huang, Jing.,Chu, Xuelei.,Jiang, Ganqing.,Kaufman, Alan J..,...&Xiao, Shuhai.(2008).Pulsed oxidation and bioloical evolution in the Ediacaran Doushantuo Formation.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,105(9),3197-3202.
MLA	McFadden, Kathleen A.,et al."Pulsed oxidation and bioloical evolution in the Ediacaran Doushantuo Formation".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 105.9(2008):3197-3202.