Dynamic deep-water oxygenation of marginal seas in the aftermath of the Sturtian Snowball Earth: Insights from redox-hydrological reconstructions of the Nanhua basin (South China)
文献类型：期刊论文
| 作者 | Dong, Feiyu7,8; Yin, Lu6,9,10; Dong, Zhiguo5; Liu, Junjie4,7; Tan, Zhaozhao2,3,8; Long, Xiaoping1; Jia, Wanglu2,3; Li, Jie2,7 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 398页码:15 |
| ISSN号 | 0301-9268 |
| 关键词 | Cryogenian interglacial period Oceanic redox conditions Mo isotope Black shale Mn carbonate ore Datangpo Formation |
| DOI | 10.1016/j.precamres.2023.107219 |
| 英文摘要 | The Cryogenian interglacial period, separated by the Sturtian and Marinoan icehouses, witnessed early radiations of eukaryotic algae and the first emergence of putative metazoans. To date, the detailed oceanic redox state in the aftermath of the Sturtian glaciation remains obscure, limiting our understanding of the causal linkage, if any, between environmental changes and biological evolution during this critical interval. In order to gain further insights into the marine redox framework following the Sturtian Snowball glaciation, here we present high resolution geochemical results of an integrated study on the basal Datangpo Formation from the Daotuo area (South China), and also provide a systematically compiled dataset of counterparts in other profiles from the Nanhua Basin. The basal Datangpo Formation is characterized by black shales intercalated with Mn carbonate ore layers in the lower (Member I), and only black shales in the upper (Member II). The Member I black shales have relatively high abundances of Mo and Re, and display a MoEF-UEF pattern typical of Mn-oxide shuttle, indicating that the Nanhua basin was redox-stratified with the oxic-euxinic chemocline fluctuating above the deep-basin floor. Multiple lines of evidence, including positive PAAS-normalized Ce anomalies, negative delta 13Ccarb values, and marked authigenic enrichments of manganophile elements (Co, Ni, Cu), imply that the Mn carbonate ore beds were generated through the diagenetic transformation of Mn oxides originally deposited under oxic bottom waters. Therefore, these Mn ore layers hosted by the Member I black shales reflect episodic benthic oxygenation. By contrast, the Nanhua basin was more stagnant during deposition of Member II black shales, as supported by their rather low Mo/TOC ratios, as well as the relatively lower abundances of Mo and Re compared to Member I black shales. Moreover, the Mo isotope data of the basal Datangpo Formation indicate that the global ocean remained pervasively anoxic. Taken together, this study reveals a more holistic redox landscape in the wake of the Sturtian Snowball Earth-that is, extensive anoxia in the global ocean with episodic deep-water oxygenation in the marginal seas such as the Nanhua Basin. These epicratonic seas with dynamic redox variations might promote the ecological revolution during the interglacial period immediately after the Sturtian glaciation. |
| WOS关键词 | MOLYBDENUM ISOTOPE FRACTIONATION ; BASAL DATANGPO FORMATION ; RICH SEDIMENTARY-ROCKS ; MANGANESE DEPOSIT ; NEOPROTEROZOIC GLACIATIONS ; AUTHIGENIC URANIUM ; MARINE-SEDIMENTS ; MN-OXIDES ; BREAK-UP ; ICP-MS |
| 资助项目 | National Key Research and Development Project of China[2020YFA0714801] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001108295500001 |
| 资助机构 | National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111154]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Li, Jie |
| 作者单位 | 1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 4.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 6.Hebei GEO Univ, Hebei Prov Collaborat Innovat Ctr Strateg Crit Min, Shijiazhuang, Peoples R China 7.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 9.Hebei GEO Univ, Hebei Key Lab Strateg Crit Mineral Resources, Shijiazhuang 050031, Peoples R China 10.Hebei GEO Univ, Coll Earth Sci, Shijiazhuang 050031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Feiyu,Yin, Lu,Dong, Zhiguo,et al. Dynamic deep-water oxygenation of marginal seas in the aftermath of the Sturtian Snowball Earth: Insights from redox-hydrological reconstructions of the Nanhua basin (South China)[J]. PRECAMBRIAN RESEARCH,2023,398:15. |
| APA | Dong, Feiyu.,Yin, Lu.,Dong, Zhiguo.,Liu, Junjie.,Tan, Zhaozhao.,...&Li, Jie.(2023).Dynamic deep-water oxygenation of marginal seas in the aftermath of the Sturtian Snowball Earth: Insights from redox-hydrological reconstructions of the Nanhua basin (South China).PRECAMBRIAN RESEARCH,398,15. |
| MLA | Dong, Feiyu,et al."Dynamic deep-water oxygenation of marginal seas in the aftermath of the Sturtian Snowball Earth: Insights from redox-hydrological reconstructions of the Nanhua basin (South China)".PRECAMBRIAN RESEARCH 398(2023):15. |
入库方式： OAI收割
来源：地质与地球物理研究所
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