Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Chu, Zhuyin1,2; Qiu, Yifan3,4; Zhou, Xiqiang2,5,6; Yang, Xuli1,2,7,8; Peng, Peng1,2,5; Zhao, Taiping3,4 ; Xu, Jifeng7,8
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| 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 | |
| Source Publication | EARTH AND PLANETARY SCIENCE LETTERS
 |
| ISSN | 0012-821X |
| 2023-11-01 | |
| Volume | 621Pages:10 |
| DOI | 10.1016/j.epsl.2023.118367 |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| Abstract | 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. |
| Keyword | Re-Os ironstones mid-Proterozoic paleo-environment atmospheric oxygen level |
| WOS ID | WOS:001073578800001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74897 |
| Collection | 中国科学院矿物学与成矿学重点实验室 |
| Corresponding Author | Chu, Zhuyin |
| Affiliation | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China 7.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 8.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China |
| Recommended Citation 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. |
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