Unique Neoproterozoic carbon isotope excursions sustained by coupled evaporite dissolution and pyrite burial | |
Shields, Graham A.1; Mills, Benjamin J. W.2; Zhu, Maoyan (朱茂炎)3,4,5; Raub, Timothy D.6; Daines, Stuart J.7; Lenton, Timothy M.7 | |
刊名 | NATURE GEOSCIENCE |
2019-10-01 | |
卷号 | 12期号:10页码:823-+ |
ISSN号 | 1752-0894 |
DOI | 10.1038/s41561-019-0434-3 |
英文摘要 | The Neoproterozoic era witnessed a succession of biological innovations that culminated in diverse animal body plans and behaviours during the Ediacaran-Cambrian radiations. Intriguingly, this interval is also marked by perturbations to the global carbon cycle, as evidenced by extreme fluctuations in climate and carbon isotopes. The Neoproterozoic isotope record has defied parsimonious explanation because sustained C-12-enrichment (low delta C-13) in seawater seems to imply that substantially more oxygen was consumed by organic carbon oxidation than could possibly have been available. We propose a solution to this problem, in which carbon and oxygen cycles can maintain dynamic equilibrium during negative delta C-13 excursions when surplus oxidant is generated through bacterial reduction of sulfate that originates from evaporite weathering. Coupling of evaporite dissolution with pyrite burial drives a positive feedback loop whereby net oxidation of marine organic carbon can sustain greenhouse forcing of chemical weathering, nutrient input and ocean margin euxinia. Our proposed framework is particularly applicable to the late Ediacaran 'Shuram' isotope excursion that directly preceded the emergence of energetic metazoan metabolisms during the Ediacaran-Cambrian transition. Here we show that non-steady-state sulfate dynamics contributed to climate change, episodic ocean oxygenation and opportunistic radiations of aerobic life during the Neoproterozoic era. |
资助项目 | NERC-NSFC programme 'Biosphere Evolution, Transitions and Resilience'[NE/P013643/1] ; NERC-NSFC programme 'Biosphere Evolution, Transitions and Resilience'[NE/P013651/1] ; NERC-NSFC programme 'Biosphere Evolution, Transitions and Resilience'[NE/R010129/1] ; University of Leeds Academic Fellowship ; National Natural Science Foundation of China[41661134048] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] |
WOS关键词 | DOUSHANTUO FORMATION ; SEAWATER CHEMISTRY ; OCEAN OXYGENATION ; SULFUR ISOTOPES ; OXIDATION ; HISTORY ; ORIGIN ; RECORD ; RISE ; AGES |
WOS研究方向 | Geology |
语种 | 英语 |
出版者 | NATURE PUBLISHING GROUP |
WOS记录号 | WOS:000488223800010 |
资助机构 | NERC-NSFC programme 'Biosphere Evolution, Transitions and Resilience' ; University of Leeds Academic Fellowship ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences |
内容类型 | 期刊论文 |
源URL | [http://ir.nigpas.ac.cn/handle/332004/27829] |
专题 | 中国科学院南京地质古生物研究所 |
通讯作者 | Shields, Graham A.; Mills, Benjamin J. W.; Zhu, Maoyan (朱茂炎) |
作者单位 | 1.UCL, Dept Earth Sci, London, England 2.Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire, England 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Jiangsu, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironm, Nanjing, Jiangsu, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 6.Univ St Andrews, Sch Earth & Environm Sci, St Andrews, Fife, Scotland 7.Univ Exeter, Global Syst Inst, Exeter, Devon, England |
推荐引用方式 GB/T 7714 | Shields, Graham A.,Mills, Benjamin J. W.,Zhu, Maoyan ,et al. Unique Neoproterozoic carbon isotope excursions sustained by coupled evaporite dissolution and pyrite burial[J]. NATURE GEOSCIENCE,2019,12(10):823-+. |
APA | Shields, Graham A.,Mills, Benjamin J. W.,Zhu, Maoyan ,Raub, Timothy D.,Daines, Stuart J.,&Lenton, Timothy M..(2019).Unique Neoproterozoic carbon isotope excursions sustained by coupled evaporite dissolution and pyrite burial.NATURE GEOSCIENCE,12(10),823-+. |
MLA | Shields, Graham A.,et al."Unique Neoproterozoic carbon isotope excursions sustained by coupled evaporite dissolution and pyrite burial".NATURE GEOSCIENCE 12.10(2019):823-+. |
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