A global transition to ferruginous conditions in the early Neoproterozoic oceans
Guilbaud, Romain1,2; Poulton, Simon W.1; Butterfield, Nicholas J.2; Zhu, Maoyan (朱茂炎)3; Shields-Zhou, Graham A.3,4
2015-06-01
发表期刊NATURE GEOSCIENCE
ISSN1752-0894
卷号8期号:6页码:466-U68
摘要

Eukaryotic life expanded during the Proterozoic eon(1), 2.5 to 0.542 billion years ago, against a background of fluctuating ocean chemistry(2-4). After about 1.8 billion years ago, the global ocean is thought to have been characterized by oxygenated surface waters, with anoxic and sulphidic waters in middle depths along productive continental margins and anoxic and iron-containing (ferruginous) deeper waters(5-7). The spatial extent of sulphidic waters probably varied through time(5,6), but this surface-to-deep redox structure is suggested to have persisted until the first Neoproterozoic glaciation about 717 million years ago(8-11). Here we report an analysis of ocean redox conditions throughout the Proterozoic using new and existing iron speciation and sulphur isotope data from multiple cores and outcrops. We find a global transition from sulphidic to ferruginous mid-depth waters in the earliest Neoproterozoic, coincident with the amalgamation of the supercontinent Rodinia at low latitudes. We suggest that ferruginous conditions were initiated by an increase in the oceanic influx of highly reactive iron relative to sulphate, driven by a change in weathering regime and the uptake of sulphate by extensive continental evaporites on Rodinia. We propose that this transition essentially detoxified ocean margin settings, allowing for expanded opportunities for eukaryote diversification following a prolonged evolutionary stasis before one billion years ago.

DOI10.1038/NGEO2434
语种英语
关键词[WOS]Billion Years Ago ; Animal Life ; Chemistry ; Oxygenation ; Iron ; Sulfate ; Basin ; Eukaryotes ; Australia ; Sediments
资助项目NERC through irs research program 'Long-term Co-evolutiion of Life and Planet'[NE/I005978/1] ; 973 program of the Ministry of Science and Technology of China[2013CB835000]
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000355236500020
项目资助者NERC through irs research program 'Long-term Co-evolutiion of Life and Planet' ; 973 program of the Ministry of Science and Technology of China
出版者NATURE PUBLISHING GROUP
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/11954
专题中国科学院南京地质古生物研究所
其他
通讯作者Guilbaud, Romain
作者单位1.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
2.Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England
3.Nanjing Inst Geol & Paleontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
4.UCL, Dept Earth Sci, London WC1E 6BT, England
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Guilbaud, Romain,Poulton, Simon W.,Butterfield, Nicholas J.,et al. A global transition to ferruginous conditions in the early Neoproterozoic oceans[J]. NATURE GEOSCIENCE,2015,8(6):466-U68.
APA Guilbaud, Romain,Poulton, Simon W.,Butterfield, Nicholas J.,Zhu, Maoyan ,&Shields-Zhou, Graham A..(2015).A global transition to ferruginous conditions in the early Neoproterozoic oceans.NATURE GEOSCIENCE,8(6),466-U68.
MLA Guilbaud, Romain,et al."A global transition to ferruginous conditions in the early Neoproterozoic oceans".NATURE GEOSCIENCE 8.6(2015):466-U68.
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