干旱区生态环境知识资源中心(Arid): 1.44 Ga Oxygenation Event: Evidence From the Southern Margin of North China

Arid

DOI	10.1029/2023JG007787
	1.44 Ga Oxygenation Event: Evidence From the Southern Margin of North China
	Yang, Hongying; Shi, Xiaoying; Xu, Lei; Sun, Longfei; Xie, Baozeng; Zhou, Limin; Huang, Kangjun; Zhou, Xiqiang; Tang, Dongjie
通讯作者	Tang, DJ
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2024
卷号	129 期号:4
英文摘要	Previous studies suggest that the atmospheric and shallow seawater oxygen levels during the mid-Proterozoic may have remained persistently unbalanced due to the low atmospheric oxygen levels and that, under these conditions, the oxygen concentrations of shallow seawater would largely reflect local oxygenation caused by primary productivity. As a result, in a microbialite-rich setting, it may be difficult to differentiate oxygenation caused by local primary productivity from overall oxygenation of the surface environment. To address this issue, we conducted an integrative study of the similar to 1.44 Ga stromatolitic carbonates of the Fengjiawan Formation in the Xiong'er Basin, southern North China, using techniques of sedimentology, mineralogy and geochemistry. The results show that the Fengjiawan Formation is dominated by water-column precipitated carbonate mud (now dolomitized), pointing to moderately oxidized marine conditions. A significant and stable negative Cerium (Ce) anomaly (as low as 0.42) is identified in a long interval (>50 m in thickness) of this formation. This Ce anomaly is lower than the minimum values both recorded in the Great Oxidation Event (GOE; minimum 0.76) and in the Neoproterozoic Oxygenation Event (NOE; minimum 0.52), suggesting a significant oxygenation process rather than an oxygen oasis. Some intervals in this formation show I/(Ca + Mg) values higher than the Precambrian background value of 0.5 mu mol/mol, providing a further support for shallow seawater oxygenation. This study, together with the enhanced oxygenation identified in the time-equivalent Tieling Formation, indicates a multi-basin oxygenation event in North China at similar to 1.44 Ga.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001205877500001
WOS关键词	RARE-EARTH-ELEMENT ; ISOTOPIC COMPOSITION ; ATMOSPHERIC OXYGEN ; TIELING FORMATION ; JIXIAN SECTION ; CARBONATE MUD ; OCEAN ; EVOLUTION ; REDOX ; ORIGIN
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404526
推荐引用方式 GB/T 7714	Yang, Hongying,Shi, Xiaoying,Xu, Lei,et al. 1.44 Ga Oxygenation Event: Evidence From the Southern Margin of North China[J],2024,129(4).
APA	Yang, Hongying.,Shi, Xiaoying.,Xu, Lei.,Sun, Longfei.,Xie, Baozeng.,...&Tang, Dongjie.(2024).1.44 Ga Oxygenation Event: Evidence From the Southern Margin of North China.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,129(4).
MLA	Yang, Hongying,et al."1.44 Ga Oxygenation Event: Evidence From the Southern Margin of North China".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 129.4(2024).