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Delayed Neoproterozoic oceanic oxygenation: Evidence from Mo isotopes of the Cryogenian Datangpo Formation
Cheng, Meng1; Li, Chao1; Chen, Xi2; Zhou, Lian3; Algeo, Thomas J.1,3,4; Ling, Hong-Fei2; Feng, Lian-Jun5; Jin, Cheng-Sheng1,6
2018-12-01
发表期刊PRECAMBRIAN RESEARCH
ISSN0301-9268
卷号319页码:187-197
摘要The Neoproterozoic oxygenation event (NOE) likely began earlier than 800 Ma, raising oxygen levels in the Earth's atmosphere-ocean system and, thus, setting the stage for the emergence and diversification of animals. However, the redox history of the oceans during the following Cryogenian Period (similar to 720-635 Ma) remains poorly constrained. Here, we present a biogeochemical study based on Mo-isotope (this study) and Fe, C, Mo abundance data (previously reported data) for black shales of the similar to 660-Ma Datangpo Formation in the Minle section of the Nanhua Basin, South China. Iron speciation data indicate that the study samples were most likely deposited under euxinic conditions. The studied samples yield two clusters of delta Mo-98 data: +0.98 parts per thousand to +1.14 parts per thousand [+1.06 +/- 0.06 (SD) parts per thousand] and -0.13 parts per thousand to +0.68 parts per thousand ( + 0.65 +/- 0.31 parts per thousand), respectively, with the higher values found mostly in the lowermost black shales. The variably lower delta Mo-98 values probably do not reflect contemporaneous open-ocean seawater composition owing to lower aqueous H2S concentrations caused by substantial watermass restriction (as evidenced by Mo-TOC covariation patterns), whereas the high delta Mo-98 values may record contemporaneous Cryogenian seawater values. The seawater 898Mo values from our study at similar to 660 Ma are similar to previously reported seawater delta Mo-98 values at similar to 750 Ma (+1.11 parts per thousand) and similar to 640Ma (+1.15 parts per thousand), implying the existence of widespread oceanic anoxia throughout the Cryogenian. Because the subsequent Ediacaran Period shows evidence of greater oceanic oxygenation based on multiple geochemical proxies, our findings suggest that the process of oceanic oxygenation proceeded slowly during the Cryogenian Period. This may have been an important factor in delaying the first appearance of metazoans until the late Cryogenian and their diversification until the Ediacaran.\
关键词Oxygenation event Euxinia Oceanic anoxia Molybdenum Early animals Metazoans
DOI10.1016/j.precamres.2017.12.007
资助者NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC ; NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC ; NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC ; NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC
关键词[WOS]BLACK SHALES ; SOUTH CHINA ; FERRUGINOUS CONDITIONS ; ATMOSPHERIC OXYGEN ; DOUSHANTUO FORMATION ; EUXINIC SEDIMENTS ; REDOX CONDITIONS ; NANHUA BASIN ; MOLYBDENUM ; EVOLUTION
语种英语
资助项目NKRD Program of China[2016YFA0601100] ; NSFC-RCUK_NERC Program[41661134048] ; Fundamental Research Funds for Central Universities (CUG-Wuhan)[1610491T01] ; Fundamental Research Funds for Central Universities (CUG-Wuhan)[G1323531767] ; GPMR program[GPMR201705] ; NSFC[41072145] ; NSFC[41703008]
资助者NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC ; NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC ; NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC ; NKRD Program of China ; NKRD Program of China ; NSFC-RCUK_NERC Program ; NSFC-RCUK_NERC Program ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; Fundamental Research Funds for Central Universities (CUG-Wuhan) ; GPMR program ; GPMR program ; NSFC ; NSFC
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000454376400012
出版者ELSEVIER SCIENCE BV
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90228
专题科技支撑系统
通讯作者Li, Chao
作者单位1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China
2.Nanjing Univ, State Key Lab Mineral Deposits Res, Nanjing 210046, Jiangsu, Peoples R China
3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China
4.Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
6.Yunnan Univ, Yunnan Key Lab Palaeobiol, Kunming 650091, Yunnan, Peoples R China
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Cheng, Meng,Li, Chao,Chen, Xi,et al. Delayed Neoproterozoic oceanic oxygenation: Evidence from Mo isotopes of the Cryogenian Datangpo Formation[J]. PRECAMBRIAN RESEARCH,2018,319:187-197.
APA Cheng, Meng.,Li, Chao.,Chen, Xi.,Zhou, Lian.,Algeo, Thomas J..,...&Jin, Cheng-Sheng.(2018).Delayed Neoproterozoic oceanic oxygenation: Evidence from Mo isotopes of the Cryogenian Datangpo Formation.PRECAMBRIAN RESEARCH,319,187-197.
MLA Cheng, Meng,et al."Delayed Neoproterozoic oceanic oxygenation: Evidence from Mo isotopes of the Cryogenian Datangpo Formation".PRECAMBRIAN RESEARCH 319(2018):187-197.
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