Redox-sensitive elements of Ediacaran black shales in South China with implications for a widespread anoxic ocean

doi:10.1016/j.jseaes.2023.105670

CORC > 海洋研究所 > 中国科学院海洋研究所 > 深海极端环境与生命过程研究中心

	Redox-sensitive elements of Ediacaran black shales in South China with implications for a widespread anoxic ocean
	Hao, Yufei 1,2,3; Liu, He 1,2; Chen, Qian 1,2,3; Sun, Weidong 1,2,3; Huang, Jing 1,2
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2023-08-01
卷号	251 页码:12
关键词	Redox-sensitive element Doushantuo Formation Redox conditions Ediacaran South China
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2023.105670
通讯作者	Huang, Jing(hjmail@qdio.ac.cn)
英文摘要	The high enrichment of redox-sensitive elements (RSEs), Mo, U, V, and Cr, in Ediacaran shales was attributed to the Neoproterozoic Oxygenation Event (NOE). However, recent studies have shown that contemporaneous shales from NW Canada do not exhibit RSE enrichment, whereas those from South China exhibit varying degrees of RSE enrichment. Here we investigate RSE records in a broader spatial and temporal distribution of shales within the Ediacaran Doushantuo Formation from South China. In general, RSEs in these shales do not display high en-richments, suggesting an extensively anoxic Ediacaran ocean with low RSE contents. There are also some outliers with high RSE enrichments of various depositional facies, which are closely tied to anoxic conditions. The abnormally high RSE enrichments in shales of the Doushantuo Formation were primarily related to the ocean environment, not due to secondary processes. We suggest that local RSE-enriched events intermittently occurred in the Nanhua Basin, possibly as a result of pulses of RSEs being transported from the surface ocean to the deep ocean. This would enhance the local RSE reservoirs, yielding high RSE enrichments in sediments. Our results suggest a widespread anoxic and RSE-depleted ocean in the Nanhua Basin during the early-middle Ediacaran Period. Contemporarily, RSE and sulfate reservoirs in the surface ocean were likely enhanced, supporting at-mospheric and oceanic oxidation. Moreover, the exchange of materials between the surface and deep sea was significantly strengthened, facilitating oceanic oxidation via the downward transportation of dissolved O2 from the surface.
资助项目	National Natural Science Foundation of China[42173060] ; National Natural Science Foundation of China[42073011] ; National Natural Science Foundation of China[LSKJ202204100] ; Taishan Scholar Program of Shandong[ts201712075] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2020212]
WOS关键词	YANGTZE GORGES AREA ; DOUSHANTUO FORMATION ; SEDIMENTARY-ROCKS ; OXYGENATION ; GEOCHEMISTRY ; MOLYBDENUM ; RISE ; DISSOLUTION ; ACRITARCHS ; ENRICHMENT
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000983408200001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/183038]
专题	海洋研究所_深海极端环境与生命过程研究中心
通讯作者	Huang, Jing
作者单位	1.Deep Sea Multidisciplinary Res Ctr, Laoshan Lab, Qingdao 266237, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hao, Yufei,Liu, He,Chen, Qian,et al. Redox-sensitive elements of Ediacaran black shales in South China with implications for a widespread anoxic ocean[J]. JOURNAL OF ASIAN EARTH SCIENCES,2023,251:12.
APA	Hao, Yufei,Liu, He,Chen, Qian,Sun, Weidong,&Huang, Jing.(2023).Redox-sensitive elements of Ediacaran black shales in South China with implications for a widespread anoxic ocean.JOURNAL OF ASIAN EARTH SCIENCES,251,12.
MLA	Hao, Yufei,et al."Redox-sensitive elements of Ediacaran black shales in South China with implications for a widespread anoxic ocean".JOURNAL OF ASIAN EARTH SCIENCES 251(2023):12.