Evidence for abundant organic matter in a Neoarchean banded iron formation

doi:10.2138/am-2022-8927

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地质与地球化学研究室

	Evidence for abundant organic matter in a Neoarchean banded iron formation
	Peng, Zidong 8,9; Nan, Jingbo 6,7; Zhang, Lianchang 5,8; Poulton, Simon W.4; Zhou, Junlie 3; Yuan, Yuan 2; Ta, Kaiwen 1; Wang, Changle 5,8; Zhai, Mingguo 5,8
刊名	AMERICAN MINERALOGIST
	2023-12-01
卷号	108 期号:12 页码:2164-2181
关键词	Organic matter carbon isotopes apatite Raman spectroscopy banded iron formation Neoarchean
ISSN号	0003-004X
DOI	10.2138/am-2022-8927
英文摘要	Microbial Fe(II) oxidation has been proposed as a major source of Fe minerals during deposition of banded iron formations (BIFs) in the Archean and Proterozoic Eons. The conspicuous absence of organic matter or graphitic carbon from BIFs, however, has given rise to divergent views on the importance of such a biologically mediated iron cycle. Here, we present mineral associations, major element concentrations, total carbon contents and carbon isotope compositions for a set of lower amphibolite-facies BIF samples from the Neoarchean Zhalanzhangzi BIF in the Qinglonghe supra-crustal sequence, Eastern Hebei, China. Graphite grains with crystallization temperatures (similar to 470 degrees C) that are comparable to that predicted for the regional metamorphic grade are widely distributed, despite highly variable iron (12.9 to 54.0 wt%) and total organic carbon (0.19 to 1.10 wt%) contents. The crystalline graphite is interpreted to represent the metamorphosed product of syngenetic biomass, based on its co-occurrence with apatite rosettes and negative bulk rock delta C-13(organic) values (-23.8 to -15.4 parts per thousand). Moreover, the crystalline graphite is unevenly distributed between iron- and silica-rich bands. In the iron-rich bands, abundant graphite relicts are closely associated with magnetite and/or are preserved within carbonate minerals (i.e., siderite, ankerite, and calcite) with highly negative bulk rock delta C-13(carb) values (-16.73 to -6.33 parts per thousand), indicating incomplete reduction of primary ferric (oxyhydr) oxides by organic matter. By comparison, only minor graphite grains are observed in the silica-rich bands. Normally, these grains are preserved within quartz or silicate minerals and thus did not undergo oxidation by Fe(III). In addition, the close association of graphite with iron-bearing phases indicates that ferric (oxyhydr)oxides may have exerted a first order control on the abundance of organic matter. Combined, the biological oxidation of Fe(II) in the oceanic photic zone and subsequent burial of ferric (oxyhydr)oxides and biomass in sediments to form BIFs, suggests that a BIF-dependent carbon cycle was important in the Archean Eon. Although significant re-adsorption of phosphorus to ferric (oxyhydr)oxides and the formation of authigenic phosphate minerals at the sediment-water interface would be expected, oxidation of biomass in BIFs may have recycled at least a portion of the P (and other nutrients) released from reactions between organic matter and ferric (oxyhydr)oxides to the overlying water column, potentially promoting further primary productivity.
资助项目	National Natural Science Foundation of China[42272082] ; National Natural Science Foundation of China[42150104] ; National Natural Science Foundation of China[42106069] ; National Natural Science Foundation of China[42006061] ; China Scholarship Council (CSC)[202004910064] ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-201905] ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-202204] ; Youth Innovation Promotion Association and Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[ZDBS-LY-DQC037]
WOS关键词	PROTEROZOIC TRANSVAAL SUPERGROUP ; NORTH CHINA CRATON ; ZIRCON U-PB ; EASTERN HEBEI ; ISOTOPE FRACTIONATION ; BIOGEOCHEMICAL CYCLES ; FORMATION DEPOSITION ; CARBONATE MINERALS ; FACIES TRANSITION ; OXIDE REDUCTION
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	MINERALOGICAL SOC AMER
WOS记录号	WOS:001197201200002
资助机构	National Natural Science Foundation of China ; China Scholarship Council (CSC) ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences ; Youth Innovation Promotion Association and Key Research Program of Frontier Sciences of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/10989]
专题	深海科学研究部_深海地质与地球化学研究室
通讯作者	Peng, Zidong; Wang, Changle
作者单位	1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 3.Xichang Univ, Sch Environm & Resource, Xichang 615000, Peoples R China 4.Univ Leeds, Sch Earth & Environm, Leeds LS29JT, W Yorkshire, England 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Ctr High Pressure Sci & Technol Adv Res HPSTAR, Beijing 100094, Peoples R China 7.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China 8.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 9.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Peng, Zidong,Nan, Jingbo,Zhang, Lianchang,et al. Evidence for abundant organic matter in a Neoarchean banded iron formation[J]. AMERICAN MINERALOGIST,2023,108(12):2164-2181.
APA	Peng, Zidong.,Nan, Jingbo.,Zhang, Lianchang.,Poulton, Simon W..,Zhou, Junlie.,...&Zhai, Mingguo.(2023).Evidence for abundant organic matter in a Neoarchean banded iron formation.AMERICAN MINERALOGIST,108(12),2164-2181.
MLA	Peng, Zidong,et al."Evidence for abundant organic matter in a Neoarchean banded iron formation".AMERICAN MINERALOGIST 108.12(2023):2164-2181.