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Quantifying the pattern of organic carbon burial through Cretaceous Oceanic Anoxic Event 2

文献类型：期刊论文

作者Guo, Huifang1,2; Chen, Xi1,3; Yao, Hanwei1,3; Zhang, Yinggang4,5; Mills, Benjamin J. W.5; Han, Kaibo1,6; Wu, Shujuan1,3; Yang, Yida1,2; Wang, Zihao2; Kemp, David B.7,8
刊名EARTH-SCIENCE REVIEWS
出版日期2024-10-01
卷号257页码:12
关键词OAE 2 Cenomanian-Turonian Tibet Oceanic anoxia Organic carbon burial
ISSN号0012-8252
DOI10.1016/j.earscirev.2024.104903
通讯作者Chen, Xi(xichen@cugb.edu.cn)
英文摘要The Cenomanian-Turonian Oceanic Anoxic Event 2 (OAE 2, ca. 94 Ma) is characterized by a marked positive carbon isotope excursion (CIE) recorded in global marine basins. This CIE results from a global-scale increase in organic matter burial, facilitated by high productivity and seawater deoxygenation. To date, however, the precise pattern of changes in the burial rate of organic matter through the event has not been well constrained. In this work, we present a compilation of data from 42 globally distributed OAE 2 sites, as well as organic carbon isotope (S13Corg), total organic carbon (TOC), and trace element concentration data from a new OAE 2 interval in southern Tibet, China. In southern Tibet, the absence of redox-sensitive trace element enrichment through OAE 2 indicates prevailing oxic conditions. Organic carbon (OC) mass accumulation rate (MAR) at this site decreased from the lower part of the CIE to the upper part, in contrast to an approximate doubling of organic carbon MAR in the upper part observed globally. This result, coupled with detailed analysis of the compilation, shows that redox was a key factor controlling organic burial rates during OAE 2, with OC MAR scaling positively with increasing deoxygenation. Leveraging a biogeochemical model to simulate these data suggets that 5-20% of the seafloor became anoxic during OAE 2, and that this deoxygenation was accompanied by 100% to 200% increase in global seawater P concentration. Our findings indicate that during OAE 2, elevated nutrient levels may have resulted from enhanced recycling from sediments under reducing conditions, sustaining intensified primary production and subsequent organic carbon export and burial.
WOS关键词CENOMANIAN-TURONIAN BOUNDARY ; WESTERN INTERIOR SEAWAY ; ISOTOPE STRATIGRAPHY ; SEDIMENT GEOCHEMISTRY ; HYDROLOGICAL CYCLE ; REDOX CONDITIONS ; COASTAL-PLAIN ; BLACK SHALES ; TIME-SCALE ; BASIN
资助项目National Natural Science Foundation of China[42050102] ; National Key Research and Development Program of China[2023YFF0804000] ; Fundamental Research Funds for the Central Universities[2652023001]
WOS研究方向Geology
语种英语
WOS记录号WOS:001309593500001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Key Research and Development Program of China ; Fundamental Research Funds for the Central Universities
源URL[http://ir.nigpas.ac.cn/handle/332004/44273]  
专题中国科学院南京地质古生物研究所
通讯作者Chen, Xi
作者单位1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China
2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
3.China Univ Geosci, Inst Earth Sci, Beijing 100083, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing, Peoples R China
5.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, England
6.Hebei GEO Univ, Sch Earth Sci, Shijiazhuang 050031, Peoples R China
7.China Univ Geosci, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
8.China Univ Geosci, Sch Earth Sci, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Huifang,Chen, Xi,Yao, Hanwei,et al. Quantifying the pattern of organic carbon burial through Cretaceous Oceanic Anoxic Event 2[J]. EARTH-SCIENCE REVIEWS,2024,257:12.
APA Guo, Huifang.,Chen, Xi.,Yao, Hanwei.,Zhang, Yinggang.,Mills, Benjamin J. W..,...&Kemp, David B..(2024).Quantifying the pattern of organic carbon burial through Cretaceous Oceanic Anoxic Event 2.EARTH-SCIENCE REVIEWS,257,12.
MLA Guo, Huifang,et al."Quantifying the pattern of organic carbon burial through Cretaceous Oceanic Anoxic Event 2".EARTH-SCIENCE REVIEWS 257(2024):12.

入库方式： OAI收割

来源：南京地质古生物研究所

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