中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院新生代地质与环境重点实验室
A Pulsed Oxygenation in Terminal Paleoproterozoic Ocean: Evidence From the Transition Between the Chuanlinggou and Tuanshanzi Formations, North China

文献类型：期刊论文

作者Wei, Beilei1,2; Tang, Dongjie1,3; Shi, Xiaoying1,2; Lechte, Maxwell4; Zhou, Limin5; Zhou, Xiqiang6,7; Song, Huyue8
刊名GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
出版日期2021-05-01
卷号22期号:5页码:23
关键词carbon isotopes early eukaryotes I/(Ca plus Mg) ratios mid-Proterozoic North China Platform redox conditions
DOI10.1029/2020GC009612
英文摘要The mid-Proterozoic (ca. 1.8-0.8 Ga) witnessed a period of stable carbon cycling and long stasis in eukaryotic evolution, which was commonly ascribed to the persistently low oxygen levels in the atmosphere-ocean system. Recently, several pulsed marine oxygenations were identified from different continents, and presumed to have facilitated the short-term diversification of eukaryotes in the early Mesoproterozoic Era. To test this hypothesis, an integrated study of iodine species [I/ (Ca + Mg)], paired carbon isotopes (delta C-13(carb) and delta C-13(org)), and elemental abundances was conducted on the fossil-bearing Tuanshanzi Formation (similar to 1.64-1.63 Ga), North China. The near-zero I/(Ca + Mg) ratios (0.00 +/- 0.01 mu mol/mol) coupled with low delta C-13(org) (-30.2 +/- 1.4 parts per thousand) in the strata below the fossil-bearing interval suggests anoxic conditions in shallow seawater. An increase of I/ (Ca + Mg) up to similar to 1.54 mu mol/mol coupled with a similar to 2 parts per thousand negative shift in delta C-13(carb) and a similar to 11 parts per thousand positive excursion in delta C-13(org) in the fossil-bearing interval point to an increased oxygen concentration. Above the fossil-bearing interval, I/ (Ca + Mg) decrease to <0.5 mu mol/mol, suggesting deoxygenation and a return to anoxic to suboxic conditions. Combined with relevant data from other mid-Proterozoic sections of North China and Australia, these data likely indicate dynamic redox conditions in the shallow seawaters of this period, with multiple pulses in oxygenation in otherwise anoxic conditions. These pulsed oxygenations may have facilitated short-term proliferation and diversification of early eukaryotes in shallow seawaters, but the overall low oxygen levels have impeded their continuous development and the rise to ecological dominance until late Neoproterozoic. Plain Language Summary The mid-Proterozoic (ca. 1.8-0.8 billion years ago) is a period characterized by a long stasis in eukaryotic evolution and pervasive ocean anoxia. However, some of the oldest possible examples of multicellular eukaryotic fossils have been interpreted from the strata of ca. 1.65-1.56 billion years ago. To reveal the potential links between eukaryotes and environments, an integrated study of iodine species, carbon isotopes, total organic carbon and element abundances was performed on the ca. 1.65-1.63 billion years old carbonates from North China. The results from iodine contents in marine carbonates indicate dynamic seawater redox conditions, with evidence for oxygenation in the fossil-bearing interval, and anoxic conditions in the overlying and underlying strata. This was further supported by the prominent shifts in carbon isotopes (both delta C-13(carb) and delta C-13(org)), implying an increased oxygenation in shallow seawater. The co-occurrence of these features likely suggested that pulsed oxygenation facilitated a short interval of eukaryotic evolution during the terminal Paleoproterozoic, however, the overall low oxygen levels during the mid-Proterozoic likely impeded their subsequent expansion and diversification.
WOS关键词MESOPROTEROZOIC JIXIAN GROUP ; CARBON-ISOTOPE EXCURSIONS ; EARLY MARINE DIAGENESIS ; ATMOSPHERIC OXYGEN ; REDOX CONDITIONS ; BILLION YEARS ; MULTICELLULAR EUKARYOTES ; SEQUENCE STRATIGRAPHY ; AUTHIGENIC CARBONATE ; XIAMALING FORMATION
资助项目National Natural Science Foundation of China[41930320] ; National Natural Science Foundation of China[41972028] ; Chinese "111" project[B20011] ; Key Research Program of the Institute of Geology & Geophysics, CAS[IGG-CAS-201905] ; Fundamental Research Funds for the Central Universities[2652019093]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000654502900020
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese "111" project ; Chinese "111" project ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese "111" project ; Chinese "111" project ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese "111" project ; Chinese "111" project ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese "111" project ; Chinese "111" project ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Key Research Program of the Institute of Geology & Geophysics, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
源URL[http://ir.iggcas.ac.cn/handle/132A11/102027]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Tang, Dongjie; Shi, Xiaoying
作者单位1.China Univ Geosci Beijing, State Key Lab Biogeol & Environm Geol, Beijing, Peoples R China
2.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing, Peoples R China
3.China Univ Geosci Beijing, Inst Earth Sci, Beijing, Peoples R China
4.McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ, Canada
5.Natl Res Ctr Geoanal, Beijing, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
7.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
8.China Univ Geosci Wuhan, State Key Lab Biogeol & Environm Geol, Wuhan, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Beilei,Tang, Dongjie,Shi, Xiaoying,et al. A Pulsed Oxygenation in Terminal Paleoproterozoic Ocean: Evidence From the Transition Between the Chuanlinggou and Tuanshanzi Formations, North China[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2021,22(5):23.
APA Wei, Beilei.,Tang, Dongjie.,Shi, Xiaoying.,Lechte, Maxwell.,Zhou, Limin.,...&Song, Huyue.(2021).A Pulsed Oxygenation in Terminal Paleoproterozoic Ocean: Evidence From the Transition Between the Chuanlinggou and Tuanshanzi Formations, North China.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,22(5),23.
MLA Wei, Beilei,et al."A Pulsed Oxygenation in Terminal Paleoproterozoic Ocean: Evidence From the Transition Between the Chuanlinggou and Tuanshanzi Formations, North China".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 22.5(2021):23.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。