干旱区生态环境知识资源中心(Arid): Archean to early Paleoproterozoic iron formations document a transition in iron oxidation mechanisms

Arid

DOI	10.1016/j.gca.2022.12.002
	Archean to early Paleoproterozoic iron formations document a transition in iron oxidation mechanisms
	Wang, Changle; Robbins, Leslie J.; Planavsky, Noah J.; Beukes, Nicolas J.; Patry, Laureline A.; Lalonde, Stefan, V; Lechte, Maxwell A.; Asael, Dan; Reinhard, Christopher T.; Zhang, Lianchang; Konhauser, Kurt O.
通讯作者	Wang, CL
来源期刊	GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN	0016-7037
EISSN	1872-9533
出版年	2023
卷号	343 页码:286-303
英文摘要	It is generally accepted that photosynthetic marine planktonic bacteria were responsible for the oxidation of dissolved ferrous iron (Fe(II)) and the subsequent deposition of iron formations (IFs) throughout the Archean and early Paleoproterozoic. However, the relative roles of the different biological Fe oxidation mechanisms in driving IF deposition-such as anoxygenic photosynthesis (photoferrotrophs) and oxy-genic photosynthesis (cyanobacteria)-remain poorly resolved. Here, we present coupled bulk-rock Fe isotope and manganese (Mn) versus Fe ratios from Archean to early Paleoproterozoic IFs in order to pro-vide a new perspective on Earth's early redox history and processes leading to IF deposition. Based on this updated IF geochemical record, we bolster the case that the partial oxidation of Fe(II) to Fe(III) was central to IF genesis, arguing against extensive water column Fe(II) silicate formation as the main process driving IF deposition. The geochemistry of IFs deposited prior to the Great Oxidation Event (GOE) shows that par-tial Fe(II) oxidation was a common feature in either anoxic or low oxygen (O2) conditions, where meta-bolic Fe(II) oxidation by photoferrotrophs is likely to have prevailed over ambient Fe(II) oxidation by O2 produced by cyanobacteria. Assuming that cyanobacteria evolved in the Archean, the presence of partial Fe(II) oxidation suggests that O2 production was relatively muted during this time. This points to a model for Archean surface redox conditions, whereby oxygen oases were relatively limited in extent, likely due to low primary productivity of cyanobacteria and high Fe fluxes. We further demonstrate a gradual dis-placement of metabolic Fe(II) oxidation in the Archean by quantitative O2-driven Fe(II) oxidation during the GOE by ca. 2.31 Ga.(c) 2022 Elsevier Ltd. All rights reserved.
英文关键词	Iron formations Iron isotope Manganese versus iron ratio Iron oxidation mechanism Archean and early Paleoproterozoic
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000929016400001
WOS关键词	BARBERTON GREENSTONE-BELT ; PB ZIRCON AGES ; SILICON ISOTOPE FRACTIONATION ; KALAHARI MANGANESE FIELD ; ISUA SUPRACRUSTAL BELT ; RARE-EARTH-ELEMENTS ; TRANSVAAL SUPERGROUP ; HAMERSLEY GROUP ; SOUTH-AFRICA ; WESTERN-AUSTRALIA
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396679
推荐引用方式 GB/T 7714	Wang, Changle,Robbins, Leslie J.,Planavsky, Noah J.,et al. Archean to early Paleoproterozoic iron formations document a transition in iron oxidation mechanisms[J],2023,343:286-303.
APA	Wang, Changle.,Robbins, Leslie J..,Planavsky, Noah J..,Beukes, Nicolas J..,Patry, Laureline A..,...&Konhauser, Kurt O..(2023).Archean to early Paleoproterozoic iron formations document a transition in iron oxidation mechanisms.GEOCHIMICA ET COSMOCHIMICA ACTA,343,286-303.
MLA	Wang, Changle,et al."Archean to early Paleoproterozoic iron formations document a transition in iron oxidation mechanisms".GEOCHIMICA ET COSMOCHIMICA ACTA 343(2023):286-303.