Oxic Fe(III) reduction could have generated Fe(II) in the photic zone of Precambrian seawater

doi:10.1038/s41598-018-22694-y

	Oxic Fe(III) reduction could have generated Fe(II) in the photic zone of Precambrian seawater
	Swanner, Elizabeth D.1,2; Maisch, Markus 2; Wu, Wenfang 2,3; Kappler, Andreas 2
刊名	SCIENTIFIC REPORTS
	2018-03-09
卷号	8
ISSN号	2045-2322
DOI	10.1038/s41598-018-22694-y
文献子类	Article
英文摘要	Many marine Precambrian iron formations (IF) record deep anoxic seawater enriched in Fe(II) (i.e. ferruginous) overlain by mildly oxygenated surface water. This is reflected by iron-rich sediments forming in deep basins, and relatively iron-poor sediments forming in shallow, sunlit waters. Such an iron gradient is often interpreted as a redox interface where dissolved Fe(II) was oxidized and precipitated as Fe(III)-bearing minerals. As such, sedimentary iron enrichments are proxy to the progressive oxidation of the oceans through geological time. However, this interpretation is founded on the assumption that Fe(II) could not persist within an oxygenated water column. Here, we cultivated cyanobacteria in an illuminated column supplied with Fe(II)-rich seawater medium in a laboratory-scale analog of a continental margin supporting IF deposition. We first observed Fe(II) oxidation with oxygen, then biologically-mediated reduction of Fe(III) (oxyhydr) oxides, which maintained a pool of Fe(II) in the presence of oxygen. Such steady-state iron redox cycling may have maintained dissolved, and hence mobile Fe(II) in oxygenated seawater above ferruginous deep basins such as those inferred for many Precambrian IF.
WOS关键词	IRON ACQUISITION ; SOUTH-AFRICA ; CARBONATE PRECIPITATION ; HETEROTROPHIC BACTERIA ; SIDEROPHORE PRODUCTION ; TRANSVAAL SUPERGROUP ; SPATIAL VARIABILITY ; KAAPVAAL CRATON ; ARCHEAN OCEAN ; REDOX STATE
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000427017800001
资助机构	Carl Zeiss postdoctoral fellowship ; Carl Zeiss postdoctoral fellowship ; NSFC(41502320) ; NSFC(41502320) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; European Research Council (ERC)(307320-MICROFOX) ; European Research Council (ERC)(307320-MICROFOX) ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Open Access Publishing Fund of University of Tubingen ; Open Access Publishing Fund of University of Tubingen ; Carl Zeiss postdoctoral fellowship ; Carl Zeiss postdoctoral fellowship ; NSFC(41502320) ; NSFC(41502320) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; European Research Council (ERC)(307320-MICROFOX) ; European Research Council (ERC)(307320-MICROFOX) ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Open Access Publishing Fund of University of Tubingen ; Open Access Publishing Fund of University of Tubingen ; Carl Zeiss postdoctoral fellowship ; Carl Zeiss postdoctoral fellowship ; NSFC(41502320) ; NSFC(41502320) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; European Research Council (ERC)(307320-MICROFOX) ; European Research Council (ERC)(307320-MICROFOX) ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Open Access Publishing Fund of University of Tubingen ; Open Access Publishing Fund of University of Tubingen ; Carl Zeiss postdoctoral fellowship ; Carl Zeiss postdoctoral fellowship ; NSFC(41502320) ; NSFC(41502320) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; Sino-German (CSC-DAAD) postdoc scholarship, China Postdoc Science Foundation(2014M560115) ; European Research Council (ERC)(307320-MICROFOX) ; European Research Council (ERC)(307320-MICROFOX) ; Deutsche Forschungsgemeinschaft (DFG) ; Deutsche Forschungsgemeinschaft (DFG) ; Open Access Publishing Fund of University of Tubingen ; Open Access Publishing Fund of University of Tubingen
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/83090]
专题	中国科学院地质与地球物理研究所
通讯作者	Swanner, Elizabeth D.
作者单位	1.Iowa State Univ, Dept Geol & Atmospher Sci, Ames, IA USA 2.Univ Tubingen, Dept Geosci, Tubingen, Germany 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Swanner, Elizabeth D.,Maisch, Markus,Wu, Wenfang,et al. Oxic Fe(III) reduction could have generated Fe(II) in the photic zone of Precambrian seawater[J]. SCIENTIFIC REPORTS,2018,8.
APA	Swanner, Elizabeth D.,Maisch, Markus,Wu, Wenfang,&Kappler, Andreas.(2018).Oxic Fe(III) reduction could have generated Fe(II) in the photic zone of Precambrian seawater.SCIENTIFIC REPORTS,8.
MLA	Swanner, Elizabeth D.,et al."Oxic Fe(III) reduction could have generated Fe(II) in the photic zone of Precambrian seawater".SCIENTIFIC REPORTS 8(2018).