Extensive sea-floor oxygenation during the early Mesoproterozoic
文献类型：期刊论文
| 作者 | Xu, Dongtao3,5; Qin, Zheng4; Wang, Xinqiang3,5; Li, Jie2 ; Shi, Xiaoying3,5; Tang, Dongjie1,5; Liu, Jingao4
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| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 354页码:186-196 |
| 关键词 | Mesoproterozoic Era Gaoyuzhuang formation Mo isotope Ocean oxygenation Eukaryotic evolution |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2023.06.007 |
| 英文摘要 | The Mesoproterozoic ocean was previously proposed to be characterized by low oxygen concentrations that may have resulted in a stasis in eukaryotic evolution. Recent studies reveal several pluses of oxygenation during this period that may have facilitated eukaryote evolution. However, few quantitative constraints on the global oxygenation events have hindered the comprehensive understanding of interactions between eukaryotes and environments. Here we present new molybdenum isotope (d(98/95)Mo, simplified as d(98)Mo) data coupled with sulfur and carbon isotope compositions and trace element contents from the carbonates and mudstones of the Gaoyuzhuang Formation (ca. 1.60-1.54 Ga) in two-well preserved sections in the North China Craton. The d(98)Mo data from the two sections show similar trends in stratigraphic variation, with a prominent positive excursion in the Gaoyuzhuang Member III and peak values reaching up to 2.03%o and 1.92%o, respectively. We developed a revised isotope mass balance model with high manganese (Mn) (hydr)oxide burial rate due to higher manganese concentration in the Mesoproterozoic oceans. Model calculation suggests that at least more than half of global seafloor (>54%) was covered with oxygenated seawater during the deposition of the Gaoyuzhuang Member III. Our estimation points to a significant oxygenation event in the early Mesoproterozoic with magnitude and extent much higher than previously thought. Further, a simple mass-balance calculation suggests that the atmospheric oxygen level was at least > 4% PAL (present atmospheric level) and likely up to 30% PAL at ca. 1.57 Ga. This oxygenation event, together with other environmental and/or developmental factors, may have facilitated a short and rapid evolution of eukaryotes in the early Mesoproterozoic. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001059496100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74771]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Wang, Xinqiang |
| 作者单位 | 1.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 4.China Univ Geosci Beijing, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 5.China Univ Geosci Beijing, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Dongtao,Qin, Zheng,Wang, Xinqiang,et al. Extensive sea-floor oxygenation during the early Mesoproterozoic[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2023,354:186-196. |
| APA | Xu, Dongtao.,Qin, Zheng.,Wang, Xinqiang.,Li, Jie.,Shi, Xiaoying.,...&Liu, Jingao.(2023).Extensive sea-floor oxygenation during the early Mesoproterozoic.GEOCHIMICA ET COSMOCHIMICA ACTA,354,186-196. |
| MLA | Xu, Dongtao,et al."Extensive sea-floor oxygenation during the early Mesoproterozoic".GEOCHIMICA ET COSMOCHIMICA ACTA 354(2023):186-196. |
入库方式： OAI收割
来源：广州地球化学研究所
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