Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Xu, Dongtao1,2; Qin, Zheng3; Wang, Xinqiang1,2; Li, Jie4 ; Shi, Xiaoying1,2; Tang, Dongjie2,5; Liu, Jingao3
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| Extensive sea-floor oxygenation during the early Mesoproterozoic | |
| Source Publication | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| ISSN | 0016-7037 |
| 2023-08-01 | |
| Volume | 354Pages:186-196 |
| DOI | 10.1016/j.gca.2023.06.007 |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| Abstract | 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. |
| Keyword | Mesoproterozoic Era Gaoyuzhuang formation Mo isotope Ocean oxygenation Eukaryotic evolution |
| WOS ID | WOS:001059496100001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74772 |
| Collection | 同位素地球化学国家重点实验室 |
| Corresponding Author | Wang, Xinqiang |
| Affiliation | 1.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 2.China Univ Geosci Beijing, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China 3.China Univ Geosci Beijing, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 5.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China |
| Recommended Citation 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. |
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