DOI: 10.1016/j.epsl.2020.116495
论文题名: Magnetite biomineralization in ferruginous waters and early Earth evolution
作者: Bauer K.W. ; Byrne J.M. ; Kenward P. ; Simister R.L. ; Michiels C.C. ; Friese A. ; Vuillemin A. ; Henny C. ; Nomosatryo S. ; Kallmeyer J. ; Kappler A. ; Smit M.A. ; Francois R. ; Crowe S.A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 549 语种: 英语
中文关键词: banded iron formations
; Earth evolution
; ferruginous oceans
; geochemistry
; magnetite
英文关键词: Biology
; Biomineralization
; Geologic models
; Lakes
; Magnetite
; Ore reduction
; Oxidation
; Abiotic pathways
; Biological signatures
; Earth's surface
; Magnetite formation
; Mediated reactions
; Planetary bodies
; Precambrian eons
; Seawater chemistry
; Iron compounds
; biomineralization
; early Earth
; evolution
; lacustrine deposit
; magnetite
; mass spectrometry
; oxidation
; Precambrian
; water column
; Greater Sunda Islands
; Lake Matano
; Lake Towuti
; Malili Lakes
; South Sulawesi
; Sulawesi
; Sunda Isles
英文摘要: Burial of large quantities of magnetite (Fe(II)Fe(III)2O4) in iron formations (IFs) likely contributed to the protracted oxidation of Earth's surface during the Precambrian Eons. Magnetite can form through a diversity of biological and abiotic pathways and its preservation in IFs may thus be variably interpreted as the result of some combination of these processes. Such interpretations give rise to divergent pictures of the Precambrian Earth system and models for its evolution through time. New knowledge on the contribution of specific magnetite formation pathways is, therefore, needed to accurately tether our conceptual and numerical models to the geologic record. To constrain pathways of magnetite formation under ferruginous conditions, we conducted geochemical and multi-method microspectroscopic analyses on particles obtained from the water columns and sediments of ferruginous lakes Matano and Towuti, in Indonesia. We find that biologically reactive Fe(III) mineral phases are reduced in the anoxic waters of both lakes, causing the formation of primary authigenic magnetite, directly in the water column. This water column magnetite often takes conspicuous framboidal forms, which given the link to microbial Fe(III) reduction, may provide a biological signature on early Earth and by extension, other planetary bodies. The consumption of more biologically reactive forms of Fe(III) and the resulting delivery of primary magnetite to underlying sediments promotes the burial of oxidized equivalents and implies that primary magnetite formation could have been a principal pathway of Fe delivery to IFs. Combined, the removal of Fe from Earth's surface through biologically induced magnetite formation and subsequent burial in IFs, suggests that seawater chemistry and the microbially mediated reactions that cause magnetite formation played key roles in Earth system evolution and in setting the pace for planetary oxidation through the Precambrian Eons. © 2020 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164858
Appears in Collections: 气候变化与战略
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作者单位: Department of Microbiology and Immunology, Department of Earth, Ocean and Atmospheric Sciences, The University of British Columbia, 2020 - 2207 Main Mall, Vancouver, BC V6T 1Z4, Canada; Center for Applied Geosciences, University of Tuebingen, Tuebingen, 72076, Germany; GFZ German Research Centre for Geosciences, Helmholtz Centre Potsdam, Potsdam, 14473, Germany; Research Center for Limnology, Indonesia Institute of Sciences (LIPI), Cibinong Science Centre, Cibinon-Bogor, Indonesia
Recommended Citation:
Bauer K.W.,Byrne J.M.,Kenward P.,et al. Magnetite biomineralization in ferruginous waters and early Earth evolution[J]. Earth and Planetary Science Letters,2020-01-01,549