IGGCAS OpenIR  > 油气资源研究院重点实验室
Shallow-marine ironstones formed by microaerophilic iron-oxidizing bacteria in terminal Paleoproterozoic
Lin, Yitian1,2; Tang, Dongjie1,3; Shi, Xiaoying1,2; Zhou, Xiqiang4; Huang, Kangjun5,6
2019-12-01
Source PublicationGONDWANA RESEARCH
ISSN1342-937X
Volume76Pages:1-18
AbstractThe microbial origin of Precambrian iron formations is debated due to the lack of direct fossil evidence. In order to reveal the genesis of ironstones under low-oxygen levels, integrative studies of sedimentology, petrography, mineralogy, and geochemistry were conducted on the intertidal to shallow subtidal ooidal and stromatolitic ironstones from the terminal Paleoproterozoic Chuanlinggou Formation (ca. 1.65-1.64 Ga) of North China, using microscopy, SEM, EDS, ICP-OES, ICP-MS and MC-ICP-MS techniques. Mineralogical study shows that the Fe-rich mineral is predominantly hematite that resulted from dehydration of amorphous Fe-oxyhydroxide during diagenesis. Petrographic observation indicates that the iron was oxidized and precipitated from seawater rather than sourced from terrestrial detritus. Basinward increases of the ironstone abundance, Eu anomalies (from 1.39 to 1.56) and delta(56) Fe values of the ironstones (from +0.5 parts per thousand to +1.0 parts per thousand) suggest that the iron was mainly sourced from seafloor hydrothermal fluids, and partially oxidized and precipitated in shallow subtidal to intertidal environments. The common existence of Fe-oxide coated sheaths, spiral stalks, residual extracellular polymer substances (EPS) and other biogenic fabrics indicates that microaerophilic iron-oxidizing bacteria (FeOB) may have played an important role in precipitating the Chuanlinggou ironstones. The extremely low oxygen concentrations implied by the proliferation of microaerophilic FeOB in the shallow waters, the weak positive Ce anomalies (0.94-1.12) and low Mn concentrations in the ironstones are broadly consistent with the previous result of a Cr isotope study. Thus the establishment of a microaerophilic FeOB genetic model for the widespread Chuanlinggou ironstones in North China provides new insight into the origin of Precambrian iron formations and the redox evolution of ocean-atmosphere systems during the "Boring Billion". (C) 2019 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
KeywordOoidal ironstone Stromatolitic ironstone Microaerophilic iron-oxidizing bacteria Rare earth elements (REEs) Fe isotopes
DOI10.1016/j.gr.2019.06.004
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
WOS KeywordNORTH CHINA CRATON ; RARE-EARTH-ELEMENT ; ISUA SUPRACRUSTAL BELT ; FE-ISOTOPE ; ATMOSPHERIC OXYGEN ; HYDROTHERMAL VENTS ; OOIDAL IRONSTONES ; PROTEROZOIC OCEAN ; SEDIMENTARY-ROCKS ; FE(II) OXIDATION
Language英语
Funding ProjectNational Natural Science Foundation of China[41672336] ; Fundamental Research Funds for the Central Universities[2652018005] ; Fundamental Research Funds for the Central Universities[2652017050]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000493799500001
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95719
Collection油气资源研究院重点实验室
Corresponding AuthorTang, Dongjie; Shi, Xiaoying
Affiliation1.China Univ Geosci Beijing, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China
2.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
3.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
5.Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Shaanxi, Peoples R China
6.Northwest Univ, Early Life Inst, Dept Geol, Xian 710069, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Lin, Yitian,Tang, Dongjie,Shi, Xiaoying,et al. Shallow-marine ironstones formed by microaerophilic iron-oxidizing bacteria in terminal Paleoproterozoic[J]. GONDWANA RESEARCH,2019,76:1-18.
APA Lin, Yitian,Tang, Dongjie,Shi, Xiaoying,Zhou, Xiqiang,&Huang, Kangjun.(2019).Shallow-marine ironstones formed by microaerophilic iron-oxidizing bacteria in terminal Paleoproterozoic.GONDWANA RESEARCH,76,1-18.
MLA Lin, Yitian,et al."Shallow-marine ironstones formed by microaerophilic iron-oxidizing bacteria in terminal Paleoproterozoic".GONDWANA RESEARCH 76(2019):1-18.
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