globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2021.117052
论文题名:
Using Zn and Ni behavior during magnetite precipitation in banded iron formations to determine its biological or abiotic origin
作者: Han X.; Tomaszewski E.J.; Schoenberg R.; Konhauser K.O.; Amor M.; Pan Y.; Warter V.; Kappler A.; Byrne J.M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 568
语种: 英语
中文关键词: BIFs ; mixed-valent iron oxide ; nickel ; Precambrian oceans ; zinc
英文关键词: Bacteria ; Dissolution ; Gallium ; Iron ; Magnetite ; Nickel ; Seawater ; Sodium bicarbonate ; Trace elements ; Banded iron formations ; Banded iron-formations ; Banded-iron formations ; Co-precipitated ; Dissolved fe ; Ferrihydrites ; Mixed-valent iron oxide ; Partition coefficient ; Precambrian ocean ; Traces elements ; Zinc ; abiotic factor ; banded iron formation ; biotic factor ; iron oxide ; magnetite ; nickel ; Precambrian ; precipitation (chemistry) ; zinc ; Bacteria (microorganisms) ; Shewanella oneidensis
英文摘要: There is longstanding controversy about the genesis of magnetite in banded iron formations (BIFs), particularly concerning whether it is of abiogenic or biogenic origin. The composition of trace elements within magnetite produced by magnetotactic bacteria has been proposed as a promising marker for its biological origin; however further experimental evidence is required to investigate whether this also holds true for iron-metabolizing bacteria. Here, we compared the behavior of zinc (Zn) and nickel (Ni) in magnetite produced either abiogenically (ferrihydrite reacting with dissolved Fe2+) or biogenically (ferrihydrite reacting with dissolved Fe2+ generated via the dissimilatory iron-reducing bacterium - DIRB - Shewanella oneidensis MR-1). These abiotic and biotic incubations were applied for transforming three ferrihydrite (Fh) substrates: (1) Control Fh without added trace elements; (2) Zn-coprecipitated ferrihydrite (ZnFh); and (3) Ni-coprecipitated ferrihydrite (NiFh) in both NaHCO3 and HEPES buffer. X-ray diffraction revealed magnetite as the dominant transformation product for all reaction conditions, while siderite was only detected in experiments containing NaHCO3 as buffer. Based on similar initial dissolved Ni and Zn concentrations, we found opposing behavior of Zn and Ni where Zn showed enrichment in abiogenic magnetite, while Ni was more enriched in biogenic magnetite. Combining supposed Zn and Ni concentrations in Precambrian seawater and magnetite mineral grains from three formations deposited at different ages (i.e. 3.75 Ga Nuvvuagittuq Supracrustal Belt, 2.45 Ga Weeli Wolli Iron Formation, and 1.88 Ga Sokoman Iron Formation), we reconstructed potential Zn and Ni partition coefficients between Precambrian seawater and magnetite minerals. The reconstructed potential Zn and Ni partition coefficients suggested that these magnetite minerals from three formations were abiogenic. These differing behaviors suggest the possibility of using Zn and Ni partition coefficient ratios as a means of determining the presence or absence of DIRB in the formation of ancient magnetite deposits. © 2021 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165493
Appears in Collections:气候变化与战略

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作者单位: Geomicrobiology, Center for Applied Geosciences, University of Tübingen, Schnarrenbergstrasse 94-96, Tübingen, 72076, Germany; Biogeomagnetism Group, Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Isotope Geochemistry, Department of Geosciences, University of Tuebingen, Schnarrenbergstrasse 94-96, Tübingen, 72076, Germany; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada; Aix-Marseille University, CNRS, CEA, UMR7265 Institute of Bioscience and Biotechnology of Aix-Marseille, CEA Cadarache, Saint-Paul-lez-Durance, F-13108, France; School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol, BS8 1RJ, United Kingdom

Recommended Citation:
Han X.,Tomaszewski E.J.,Schoenberg R.,et al. Using Zn and Ni behavior during magnetite precipitation in banded iron formations to determine its biological or abiotic origin[J]. Earth and Planetary Science Letters,2021-01-01,568
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