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Pyrite sulfur isotopes constrained by sedimentation rates: Evidence from sediments on the East China Sea inner shelf since the late Pleistocene

文献类型：期刊论文

作者Liu, Xiting1,2; Fike, David3; Li, Anchun4; Dong, Jiang4,5; Xu, Fangjian6; Zhuang, Guangchao7; Rendle-Buehring, Rebecca8; Wan, Shiming4
刊名CHEMICAL GEOLOGY
出版日期2019-02-05
卷号505页码:66-75
关键词Pyrite Sulfur isotope Microbial sulfate reduction Mud depocenter East China Sea
ISSN号0009-2541
DOI10.1016/j.chemgeo.2018.12.014
通讯作者Liu, Xiting(liuxiting@ouc.edu.cn) ; Li, Anchun(acli@qdio.ac.cn)
英文摘要Isotopic compositions of coeval sulfide and sulfate have been widely employed to reconstruct the seawater chemistry evolution over geologic time; however, these signals can be modulated by other factors, such as the sedimentation rate. Here, we present a data set of pyrite sulfur isotopes (delta S-34(py)) derived from 60-m drilled core sediments deposited on the inner shelf of the East China Sea since 16.5 ka. The resulting delta S-34(py) values range from -38.2 to 15.0 parts per thousand (Vienna Canyon Diablo Troilite; V-CDT), representing a range of 53.2 parts per thousand. Freshwater deposition before 12.3 ka produced a limited pyrite abundance and delta S-34(py) values that fall within the typical range of freshwater environments. After the marine incursion in the study area at 12.3 ka, variations in the delta S-34(py) values become significantly correlated with sedimentation rates (SRs; r = 0.78, p < 0.01), which were controlled by the intensity of coastal currents in response to the East Asian winter monsoon. Specifically, pyrite sulfur is markedly depleted in S-34 during the intervals with low SRs (delta S-34(py) < -30 parts per thousand) relative to that observed during the intervals with high SRs (delta S-34(py) > 0 parts per thousand), suggesting that SRs exert controls on delta S-34(py) values. We propose that these sedimentary controls are expressed by modulating the connectivity between porewaters and the overlying seawater. Low SRs tend to form an open diagenetic system, in which the pyrites are able to preserve the large biological fractionations associated with microbial sulfate reduction (and disproportionation). In contrast, high SRs favour a restricted diagenetic system, in which the distillation of porewater sulfate produces pyrites enriched in S-34, masking the magnitude of biological fractionation during microbial sulfur cycling. These findings highlight the critical effect of the local sedimentation regime on pyrite sulfur isotopic compositions, especially within shallow depositional environments, over geologic time.
资助项目National Natural Science Foundation of China[41430965] ; National Natural Science Foundation of China[41606062] ; State Key Laboratory of Marine Geology, Tongji University[MGK1824] ; Senior User Project of RV KEXUE[KEXUE2017G1]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000456707400007
出版者ELSEVIER SCIENCE BV
源URL[http://ir.qdio.ac.cn/handle/337002/160673]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Liu, Xiting; Li, Anchun
作者单位1.Ocean Univ China, Key Lab Submarine Geosci & Prospecting Technol, Coll Marine Geosci, Qingdao 266100, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.China Univ Petr, Sch Geosci, Qingdao 266580, Peoples R China
7.Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA
8.Univ Bremen, MARUM Ctr Marine Environm Sci, D-28359 Bremen, Germany
推荐引用方式
GB/T 7714		 Liu, Xiting,Fike, David,Li, Anchun,et al. Pyrite sulfur isotopes constrained by sedimentation rates: Evidence from sediments on the East China Sea inner shelf since the late Pleistocene[J]. CHEMICAL GEOLOGY,2019,505:66-75.
APA Liu, Xiting.,Fike, David.,Li, Anchun.,Dong, Jiang.,Xu, Fangjian.,...&Wan, Shiming.(2019).Pyrite sulfur isotopes constrained by sedimentation rates: Evidence from sediments on the East China Sea inner shelf since the late Pleistocene.CHEMICAL GEOLOGY,505,66-75.
MLA Liu, Xiting,et al."Pyrite sulfur isotopes constrained by sedimentation rates: Evidence from sediments on the East China Sea inner shelf since the late Pleistocene".CHEMICAL GEOLOGY 505(2019):66-75.

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来源：海洋研究所

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