Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1720820115 |
Transient surface ocean oxygenation recorded in the similar to 2.66-Ga Jeerinah Formation, Australia | |
Koehler, Matthew C.1,2,3; Buick, Roger1,2,3; Kipp, Michael A.1,2,3; Stueken, Eva E.3,4; Zaloumis, Jonathan1,2,5 | |
2018-07-24 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:30页码:7711-7716 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Scotland |
英文摘要 | Many paleoredox proxies indicate low-level and dynamic incipient oxygenation of Earth's surface environments during the Neoarchean (2.8-2.5 Ga) before the Great Oxidation Event (GOE) at similar to 2.4 Ga. The mode, tempo, and scale of these redox changes are poorly understood, because data from various locations and ages suggest both protracted and transient oxygenation. Here, we present bulk rock and kerogen-bound nitrogen isotope ratios as well as bulk rock selenium abundances and isotope ratios from drill cores sampled at high stratigraphic resolution through the Jeerinah Formation (similar to 2.66 Ga; Fortescue Group, Western Australia) to test for changes in the redox state of the surface environment. We find that both shallow and deep depositional facies in the Jeerinah Formation display episodes of positive primary delta N-15 values ranging from +4 to +6%., recording aerobic nitrogen cycling that requires free O-2 in the upper water column. Moderate selenium enrichments up to 5.4 ppm in the near-shore core may indicate coincident oxidative weathering of sulfide minerals on land, although not to the extent seen in the younger Mt. McRae Shale that records a well-documented "whiff" of atmospheric oxygen at 2.5 Ga. Unlike the Mt. McRae Shale, Jeerinah selenium isotopes do not show a significant excursion concurrent with the positive delta N-15 values. Our data are thus most parsimoniously interpreted as evidence for transient surface ocean oxygenation lasting less than 50 My, extending over hundreds of kilometers, and occurring well before the GOE. The nitrogen isotope data clearly record nitrification and denitrification, providing the oldest firm evidence for these microbial metabolisms. |
英文关键词 | Neoarchean nitrogen isotopes oxygenation selenium |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439574700048 |
WOS关键词 | HAMERSLEY BASIN ; ISOTOPE FRACTIONATION ; COMPLETE NITRIFICATION ; NITROGEN ISOTOPES ; REDOX STATE ; RISE ; OXIDATION ; CYCLE ; ATMOSPHERE ; PYRITE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204955 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA; 2.Univ Washington, Astrobiol Program, Seattle, WA 98195 USA; 3.NASA, Astrobiol Inst, Virtual Planetary Lab, Seattle, WA 98195 USA; 4.Univ St Andrews, Sch Earth & Environm Sci, St Andrews KY16 9AL, Fife, Scotland; 5.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA |
推荐引用方式 GB/T 7714 | Koehler, Matthew C.,Buick, Roger,Kipp, Michael A.,et al. Transient surface ocean oxygenation recorded in the similar to 2.66-Ga Jeerinah Formation, Australia[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(30):7711-7716. |
APA | Koehler, Matthew C.,Buick, Roger,Kipp, Michael A.,Stueken, Eva E.,&Zaloumis, Jonathan.(2018).Transient surface ocean oxygenation recorded in the similar to 2.66-Ga Jeerinah Formation, Australia.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(30),7711-7716. |
MLA | Koehler, Matthew C.,et al."Transient surface ocean oxygenation recorded in the similar to 2.66-Ga Jeerinah Formation, Australia".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.30(2018):7711-7716. |
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