Carbon and sulfur cycling across the Silurian-Devonian boundary in the Qujing Basin, South China

doi:10.1016/j.chemgeo.2024.121952

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	Carbon and sulfur cycling across the Silurian-Devonian boundary in the Qujing Basin, South China
	Sun, Lilin 1; Zhang, Xiaolin 1; Zhu, Min2,3 ; Xu, Yilun 1; Zhao, Wenjin 2,3; Shen, Yanan 1
	2024-03-20
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	648 页码:10
通讯作者	Sun, Lilin(sllin@ustc.edu.cn)
摘要	During the late Silurian - Early Devonian there were significant changes in the biosphere and environment. However, there are few integrated studies of carbon and sulfur cycling in the Qujing Basin, in South China, which has extremely well-preserved sarcopterygian fossils. Here we report C-isotopic data of organic carbon (delta 13Corg) and multiple S-isotopes of pyrite (delta 34S and Delta 33S) from two sections in the Qujing Basin. Our delta 13Corg data show an increase of -4 parts per thousand near the Silurian-Devonian boundary which can be correlated globally. We suggest that this rise in delta 13Corg near the Silurian-Devonian boundary may have resulted from the weathering of the 13C-enriched carbonate platform, rather than from oceanic anoxia. This interpretation may explain why there is little evidence of a mass extinction near the Silurian-Devonian boundary in the Qujing Basin. Our S-isotopic data show positive delta 34S values with either positive or negative Delta 33S values, and most of the delta 34S and Delta 33S data can be explained by microbial sulfate reduction and Rayleigh distillation processes. The S-isotopic data from both sections suggest that seawater sulfate concentrations were very low in the Qujing Basin during the late Silurian - Early Devonian.
关键词	C-isotope Multiple S-isotopes Sulfate concentration The Silurian-Devonian boundary Qujing Basin
DOI	10.1016/j.chemgeo.2024.121952
关键词[WOS]	MICROBIAL SULFATE REDUCTION ; ISOTOPE FRACTIONATION ; WATER COLUMN ; NORTHEASTERN YUNNAN ; MASS EXTINCTION ; LAND PLANTS ; EVOLUTION ; STRATIGRAPHY ; OCEAN ; CONSTRAINTS
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41721002] ; National Natural Science Foundation of China[41890842] ; National Natural Science Foundation of China[42130209] ; The 111 project[B14026]
项目资助者	National Natural Science Foundation of China ; The 111 project
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001172697900001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23452
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Sun, Lilin
作者单位	1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key CAS Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Sun, Lilin,Zhang, Xiaolin,Zhu, Min,et al. Carbon and sulfur cycling across the Silurian-Devonian boundary in the Qujing Basin, South China[J]. CHEMICAL GEOLOGY,2024,648:10.
APA	Sun, Lilin,Zhang, Xiaolin,Zhu, Min,Xu, Yilun,Zhao, Wenjin,&Shen, Yanan.(2024).Carbon and sulfur cycling across the Silurian-Devonian boundary in the Qujing Basin, South China.CHEMICAL GEOLOGY,648,10.
MLA	Sun, Lilin,et al."Carbon and sulfur cycling across the Silurian-Devonian boundary in the Qujing Basin, South China".CHEMICAL GEOLOGY 648(2024):10.