Molecular mechanism of metamorphic alteration on traces of early life in banded iron formations
文献类型：期刊论文
| 作者 | Nan, Jingbo10,11 ; Peng, Zidong1,9; Wang, Chao11; Papineau, Dominic6,7,8; She, Zhenbing8; Guo, Zixiao5,6,7; Peng, Xiaotong4; Zhou, Junlie3; Hu, Yingjie2; Yao, Weiqi10
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| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
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| 出版日期 | 2023-08-01 |
| 卷号 | 615页码:13 |
| ISSN号 | 0012-821X |
| 关键词 | early life banded iron formation biosignatures carbon isotopes Raman NanoIR |
| DOI | 10.1016/j.epsl.2023.118226 |
| 通讯作者 | Nan, Jingbo(jingbo.nan@icloud.com) ; Tao, Renbiao(renbiao.tao@hpstar.ac.cn) |
| 英文摘要 | It is well-known that multi-stage metamorphism can result in the alteration of indigenous biological molecules, limiting our understanding of early life on Earth. However, the physiochemical mechanisms involved in these processes are still poorly understood. In this study, we present petrographic observations and micro- to nano-geochemical investigations on the carbonaceous matter (CM) in representative Neoarchean banded iron formations (BIFs) from North China, which have undergone significant alteration during lower amphibolite-facies prograde metamorphism, and subsequent retrograde alteration. The CM is in paragenetic equilibrium with prograde mineral phases, and is often associated with apatite that occurs in Fe-rich bands parallel to layering. This implies that the CM is most likely inherited from syn-depositional biomass, as confirmed by the nanoscale infrared spectroscopy, which shows the presence of C=C, C-H, and C-N/N-H bonds. Raman spectroscopic analyses reveal that the maximum metamorphic temperature of CM is 479 & PLUSMN; 50 degrees C, which is consistent with the metamorphic peak conditions of the host BIFs from petrographic constraints (i.e., garnet-bearing amphibolite-face metamorphism). The BIFs possess average bulk 813Corg values of -20.0 & PLUSMN; 0.9%o (1o-) and 813Ccarb values of -12.9 & PLUSMN; 1.8%o (1o-), further indicating syngenetic biomass graphitization during prograde metamorphism. This thermal cracking process may have released gaseous hydrocarbons, as shown by secondary CH4 fluid inclusions in quartz. We further use quantum mechanical simulations to constrain dissociative tendencies for functional groups (C-C, C-H, C-O, and C-N) of original organic molecules to assess the stability of organic chemical bonds during prograde metamorphism (0-600 degrees C, 0-15 kbar). The relatively high thermal durability of C-H and the armoring effects of primary organicphyllosilicate complexes may account for C-H preservation in BIFs. Furthermore, the electron microscopy combined with elemental analysis reveals widespread nano-chlorite infiltration into CM during retrograde metamorphism (i.e., partial replacement of garnet by chlorite). The pervasive CM alteration is likely responsible for the absence of C-O bonds, where nanopore-scale reactions might have played a key role. Altogether, we suggest that multi-stage metamorphic processes, involving mineral-organic reactions and nanoscale interface interactions, may have governed the preservation of ancient biosignatures in BIFs. Our findings highlight the importance of evaluating metamorphic effects when using molecular signals to reconstruct early life behaviors, and shed new light on the study of primordial microorganisms, particularly those found in iron-rich sediments on early Earth.& COPY; 2023 Elsevier B.V. All rights reserved. |
| WOS关键词 | SUPRACRUSTAL ROCKS ; NITROGEN ISOTOPES ; SUBDUCTION ZONES ; EARLIEST TRACES ; WEST GREENLAND ; GRAPHITE ; EARTH ; METASEDIMENTS ; HYDROCARBON ; SUPERGROUP |
| 资助项目 | Original Exploratory Program from the National Natural Science Foundation of China[42150104] ; National Natural Science Foundation of China[42106069] ; National Natural Science Foundation of China[41902078] ; National Natural Science Foundation of China[42172337] ; Key Research Program of Frontier Sciences, CAS[ZDBS-LY- DQC037] ; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-202204] ; Youth Innovation Promotion Association, CAS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001013926600001 |
| 资助机构 | Original Exploratory Program from the National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Youth Innovation Promotion Association, CAS |
| 源URL | [http://ir.idsse.ac.cn/handle/183446/10373]  |
| 专题 | 专家咨询委员会 |
| 通讯作者 | Nan, Jingbo; Tao, Renbiao |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100012, Peoples R China 2.Nanjing Xiaozhuang Univ, Nanjing Key Lab Adv Funct Mat, Nanjing 211171, Peoples R China 3.Xichang Univ, Sch Environm & Resource, Xichang, Peoples R China 4.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China 5.Hebei Normal Univ, Sch Geog Sci, Hebei Key Lab Environm Change & Ecol Construct, Shijiazhuang 050024, Peoples R China 6.UCL, Ctr Planetary Sci, 17-19 Gordon St, London WC1H 0AH, England 7.UCL, London Ctr Nanotechnol, Dept Earth Sci, 17-19 Gordon St, London WC1H 0AH, England 8.China Univ Geosci, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China 9.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 10.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nan, Jingbo,Peng, Zidong,Wang, Chao,et al. Molecular mechanism of metamorphic alteration on traces of early life in banded iron formations[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,615:13. |
| APA | Nan, Jingbo.,Peng, Zidong.,Wang, Chao.,Papineau, Dominic.,She, Zhenbing.,...&Tao, Renbiao.(2023).Molecular mechanism of metamorphic alteration on traces of early life in banded iron formations.EARTH AND PLANETARY SCIENCE LETTERS,615,13. |
| MLA | Nan, Jingbo,et al."Molecular mechanism of metamorphic alteration on traces of early life in banded iron formations".EARTH AND PLANETARY SCIENCE LETTERS 615(2023):13. |
入库方式： OAI收割
来源：深海科学与工程研究所
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