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| Low oxygen levels with high redox heterogeneity in the late Ediacaran shallow ocean: Constraints from I/(Ca plus Mg) and Ce/Ce* of the Dengying Formation, South China | |
| Ding, Yi1,2; Sun, Wei1; Liu, Shugen1,3; Xie, Jirong4; Tang, Dongjie5; Zhou, Xiqiang6,7,8; Zhou, Limin9; Li, Zhiwu1; Song, Jinmin1; Li, Zeqi1; Xu, Hongyuan1; Tang, Pan6,8; Liu, Kang6,8; Li, Wenjun10; Chen, Daizhao6,7,8 | |
| 2022-08-09 | |
| Source Publication | GEOBIOLOGY
 |
| ISSN | 1472-4677 |
| Pages | 20 |
| Abstract | Most previous studies focused on the redox state of the deep water, leading to an incomplete understanding of the spatiotemporal evolution of the redox-stratified ocean during the Ediacaran-Cambrian transition. In order to decode the redox condition of shallow marine environments during the late Ediacaran, this study presents I/(Ca + Mg), carbon and oxygen isotope, major, trace, and rare earth element data of subtidal to peritidal dolomite from the Dengying Formation at Yangba, South China. In combination with the reported radiometric and biostratigraphic data, the Dengying Formation and coeval successions worldwide are subdivided into a positive delta C-13 excursion (up to similar to 6 parts per thousand) in the lower part (similar to 551-547 Ma) and a stable delta C-13 plateau (generally between 0 parts per thousand and 3 parts per thousand) in the middle-upper part (similar to 547-541 Ma). The overall low I/(Ca + Mg) ratios (<0.5 mu mol/mol) and slightly negative to no Ce anomalies (0.80 < [Ce/Ce*](SN) < 1.25), point to low-oxygen levels in shallow marine environments at Yangba. Moreover, four pulsed negative excursions in (Ce/Ce*)(SN) (between 0.62 and 0.8) and the associated two positive excursions in I/(Ca + Mg) ratios (up to 2.02 mu mol/mol) are observed, indicative of weak oxygenations in the shallow marine environments. The comparison with other upper Ediacaran shallow water successions worldwide reveals that the (Ce/Ce*)(SN) and I/(Ca + Mg) values generally fall in the Precambrian range but their temporal trends differ among these successions (e.g., Ce anomaly profiles significantly different between Yangba and the Yangtze Gorge sections), which point to low oxygen levels with high redox heterogeneity in the surface ocean. This is consistent with the widespread anoxia as revealed by low delta U-238 values reported by previous studies. Thus, the atmospheric oxygen concentrations during the late Ediacaran are estimated to be very low, similar to the case during the most Mesoproterozoic to early Neoproterozoic period. |
| Keyword | Ce anomalies I/(Ca plus Mg) late Ediacaran redox condition shallow marine |
| DOI | 10.1111/gbi.12520 |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| WOS Keyword | RARE-EARTH-ELEMENTS ; NEOPROTEROZOIC OXYGENATION ; YANGTZE PLATFORM ; SULFUR CYCLE ; ISOTOPE ; EVOLUTION ; SEAWATER ; CERIUM ; CARBONATE ; RATIOS |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[U19B6003] ; National Natural Science Foundation of China[41902105] ; National Natural Science Foundation of China[91755210] |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| WOS Research Area | Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Geology |
| WOS Subject | Biology ; Environmental Sciences ; Geosciences, Multidisciplinary |
| WOS ID | WOS:000852453300001 |
| Publisher | WILEY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iggcas.ac.cn/handle/132A11/108380 |
| Collection | 新生代地质与环境院重点实验室 矿产资源研究院重点实验室 |
| Corresponding Author | Liu, Shugen; Chen, Daizhao |
| Affiliation | 1.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, 1 Erxianqiao Dongsan Rd, Chengdu 610059, Peoples R China 2.Chengdu Univ Technol, Minist Nat Resources, Key Lab Deep Time Geog & Environm Reconstruct & A, Chengdu, Peoples R China 3.Xihua Univ, Chengdu, Peoples R China 4.PetroChina Southwest Oil & Gas Field Co, Explorat & Dev Res Inst, Chengdu, Peoples R China 5.China Univ Geosci Beijing, State Key Lab Biogeol & Environm Geol, Beijing, Peoples R China 6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, 19 Beitucheng Xilu, Beijing 100029, Peoples R China 7.Chinese Acad Sci, Innovat Acad Earth Sci, Inst Geol & Geophys, Beijing, Peoples R China 8.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 9.Natl Res Ctr Geoanal, Beijing, Peoples R China 10.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China |
| Corresponding Author Affilication | Institute of Geology and Geophysics, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Ding, Yi,Sun, Wei,Liu, Shugen,et al. Low oxygen levels with high redox heterogeneity in the late Ediacaran shallow ocean: Constraints from I/(Ca plus Mg) and Ce/Ce* of the Dengying Formation, South China[J]. GEOBIOLOGY,2022:20. |
| APA | Ding, Yi.,Sun, Wei.,Liu, Shugen.,Xie, Jirong.,Tang, Dongjie.,...&Chen, Daizhao.(2022).Low oxygen levels with high redox heterogeneity in the late Ediacaran shallow ocean: Constraints from I/(Ca plus Mg) and Ce/Ce* of the Dengying Formation, South China.GEOBIOLOGY,20. |
| MLA | Ding, Yi,et al."Low oxygen levels with high redox heterogeneity in the late Ediacaran shallow ocean: Constraints from I/(Ca plus Mg) and Ce/Ce* of the Dengying Formation, South China".GEOBIOLOGY (2022):20. |
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