Re-Os, Sr-Nd isotopic and PGE elemental constraints for the formation of mid-Proterozoic ironstones in North China Craton: Implications for the atmospheric oxygen level
文献类型：期刊论文
| 作者 | Chu, Zhuyin1,8; Qiu, Yifan6,7; Zhou, Xiqiang4,5,8; Yang, Xuli1,2,3,8; Peng, Peng1,5,8; Zhao, Taiping6,7 ; Xu, Jifeng2,3
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| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
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| 出版日期 | 2023-11-01 |
| 卷号 | 621页码:10 |
| 关键词 | Re-Os ironstones mid-Proterozoic paleo-environment atmospheric oxygen level |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2023.118367 |
| 英文摘要 | The origin (hydrothermal vs. continental Fe source) and environmental implications in particular for the atmospheric oxygen level of mid-Proterozoic ironstones have been widely studied, but remain highly debated. Here, we present Re-Os, Sr-Nd isotopic and PGE elemental data for ironstones from the-1.7 Ga Yunmengshan (YMS) Formation in south margin of the North China Craton to address the controversy. The initial 87Sr/86Sr ratios of the YMS ironstones are-0.7063, which are roughly comparable with seawater values around that period, suggesting a seawater signal with minor/minimal direct contributions from submarine hydrothermal fluids. The Nd isotopic compositions (& epsilon;Nd(t): -6.6 to -6.0) indicate a dominantly continental crustal signal for the formation of the ironstones. The PGE patterns of the YMS ironstones are distinctly similar to those of hydrogenous Fe-Mn crusts/nodules in modern ocean, also suggesting deposition from normal seawater conditions. Importantly, the YMS ironstones give initial 187Os/188Os ratios of-0.6 at-1.7 Ga, providing critical constraints for contemporaneous seawater values. This seawater 187Os/188Os value of-0.6 strongly suggests a result of oxidative weathering and transportation of Os in continental crust into the ocean, implying a relatively high atmospheric oxygen level at-1.7 Ga. & COPY; 2023 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001073578800001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74896]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Chu, Zhuyin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 3.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 4.Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 6.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 7.Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 8.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, Zhuyin,Qiu, Yifan,Zhou, Xiqiang,et al. Re-Os, Sr-Nd isotopic and PGE elemental constraints for the formation of mid-Proterozoic ironstones in North China Craton: Implications for the atmospheric oxygen level[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,621:10. |
| APA | Chu, Zhuyin.,Qiu, Yifan.,Zhou, Xiqiang.,Yang, Xuli.,Peng, Peng.,...&Xu, Jifeng.(2023).Re-Os, Sr-Nd isotopic and PGE elemental constraints for the formation of mid-Proterozoic ironstones in North China Craton: Implications for the atmospheric oxygen level.EARTH AND PLANETARY SCIENCE LETTERS,621,10. |
| MLA | Chu, Zhuyin,et al."Re-Os, Sr-Nd isotopic and PGE elemental constraints for the formation of mid-Proterozoic ironstones in North China Craton: Implications for the atmospheric oxygen level".EARTH AND PLANETARY SCIENCE LETTERS 621(2023):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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