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

doi:10.1016/j.earscirev.2024.104903

NIGPAS OpenIR

	Quantifying the pattern of organic carbon burial through Cretaceous Oceanic Anoxic Event 2
通讯作者	Chen, Xi([email protected])
	Guo, Huifang 1,2; Chen, Xi 1,3; Yao, Hanwei 1,3; Zhang, Yinggang 4,5; Mills, Benjamin J. W.5; Han, Kaibo 1,6; Wu, Shujuan 1,3; Yang, Yida 1,2; Wang, Zihao 2; Kemp, David B.7,8
	2024-10-01
发表期刊	EARTH-SCIENCE REVIEWS
ISSN	0012-8252
卷号	257 页码:12
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.
关键词	OAE 2 Cenomanian-Turonian Tibet Oceanic anoxia Organic carbon burial
DOI	10.1016/j.earscirev.2024.104903
收录类别	SCI
语种	英语
关键词[WOS]	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
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001309593500001
项目资助者	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Fundamental Research Funds for the Central Universities
出版者	ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44274
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.