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  4. 岩石圈演化国家重点实验室
Chromium isotopic compositions of a reef in the South China Sea: Biological effects and influence from early diagenetic Mn-oxides reduction

文献类型：期刊论文

作者Yu, Xi4,5; Fang, Ziyao4,5; He, Xiaoqing4,5; Yi, Liang1,6; Deng, Chenglong1,2; Yan, Wen2,3; Qin, Liping4,5
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2023-10-15
卷号628页码:11
ISSN号0031-0182
DOI10.1016/j.palaeo.2023.111729
英文摘要Global climate fluctuations have been inextricably linked with changes in the marine environment and ecosystems' evolution during the Cenozoic. The chromium isotopic compositions (853Cr) of marine carbonates have been used to study changes in ocean redox conditions. However, whether 853Cr of carbonates faithfully reflect the information of ambient seawater at the time of deposition remains controversial. Here, we report major and trace element concentrations, as well as the Cr isotopic compositions for samples from a Neogene-Quaternary biogenic reef (Core NK-1) in the South China Sea. The samples exhibit highly variable Cr concentrations and 853Cr values. The Cr concentrations range from 0.76 & mu;g/g to 8.58 & mu;g/g with an average of 3.96 & mu;g/g, and the 853Cr values vary from-0.54%o to 0.68%o with an average of 0.06%o, which are generally lower than the reported Cr isotopic compositions for global seawater. The fluctuation of 853Cr values is unlikely to be controlled by changes in the redox conditions of seawater. Biogenic processes may have affected some samples with relatively low Cr concentrations and 853Cr values. Other samples may have been affected by post-depositional addition of Cr from pore water. Early diagenetic reduction of ferromanganese oxides is likely another significant control factor for the variation of 853Cr values. The results suggest that the factors influencing the Cr isotopic compositions of biogenic carbonate reefs are complex, and the variation of Cr isotopic compositions should not be directly linked to the redox state of the ocean. After evaluating the potential influences of multiple factors, the inferred Cr isotopic compositions of syn-depositional fluids of the carbonates from Core NK-1 are similar, which may suggest a relatively stable redox environment in the South China Sea during the Neogene to Quaternary period.
WOS关键词CR-ISOTOPE ; HEXAVALENT CHROMIUM ; CR(VI) REDUCTION ; OCEAN ; SEAWATER ; REDOX ; FRACTIONATION ; OXYGENATION ; PACIFIC ; GEOCHEMISTRY
资助项目National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41930216] ; National Natural Science Foundation of China[42103006] ; Key Research Program, CAS[42103007] ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration[ZDBS-SSW-JSC007] ; Natural Science Foundation of Anhui Province[D020202] ; Fundamental Research Funds for the Central Universities of China[2108085QD163] ; Tecent Foundation and XPLORER PRIZE ; [WK3410000019]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:001069243200001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program, CAS ; Key Research Program, CAS ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Fundamental Research Funds for the Central Universities of China ; Fundamental Research Funds for the Central Universities of China ; Tecent Foundation and XPLORER PRIZE ; Tecent Foundation and XPLORER PRIZE ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program, CAS ; Key Research Program, CAS ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Fundamental Research Funds for the Central Universities of China ; Fundamental Research Funds for the Central Universities of China ; Tecent Foundation and XPLORER PRIZE ; Tecent Foundation and XPLORER PRIZE ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program, CAS ; Key Research Program, CAS ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Fundamental Research Funds for the Central Universities of China ; Fundamental Research Funds for the Central Universities of China ; Tecent Foundation and XPLORER PRIZE ; Tecent Foundation and XPLORER PRIZE ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program, CAS ; Key Research Program, CAS ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Pre-research Project on Civil Aerospace Technologies of the Chinese National Space Administration ; Natural Science Foundation of Anhui Province ; Natural Science Foundation of Anhui Province ; Fundamental Research Funds for the Central Universities of China ; Fundamental Research Funds for the Central Universities of China ; Tecent Foundation and XPLORER PRIZE ; Tecent Foundation and XPLORER PRIZE
源URL[http://ir.iggcas.ac.cn/handle/132A11/110840]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Fang, Ziyao; Qin, Liping
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China
4.CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China
5.Univ Sci & Technol China, Deep Space Explorat Lab, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China
6.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Xi,Fang, Ziyao,He, Xiaoqing,et al. Chromium isotopic compositions of a reef in the South China Sea: Biological effects and influence from early diagenetic Mn-oxides reduction[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2023,628:11.
APA Yu, Xi.,Fang, Ziyao.,He, Xiaoqing.,Yi, Liang.,Deng, Chenglong.,...&Qin, Liping.(2023).Chromium isotopic compositions of a reef in the South China Sea: Biological effects and influence from early diagenetic Mn-oxides reduction.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,628,11.
MLA Yu, Xi,et al."Chromium isotopic compositions of a reef in the South China Sea: Biological effects and influence from early diagenetic Mn-oxides reduction".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 628(2023):11.

入库方式： OAI收割

来源：地质与地球物理研究所

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