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Evaluation of shallow-water corals and associated carbonate sediments as seawater Ba isotope archives in the South China Sea

文献类型：期刊论文

作者Lin, Yi-Bo6,7; Wei, Hai-Zhen5,7; Zhang, Feifei6,7; Hohl, Simon V.4; Wei, Guang-Yi6,7; Li, Tao3; Xiong, Guo-Lin6,7; Li, Na2,6; Jiang, Shao-Yong1
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2022-11-01
卷号605页码:11
ISSN号0031-0182
关键词Ba isotopes Bulk carbonate sediments Coral skeleton South China Sea
DOI10.1016/j.palaeo.2022.111196
通讯作者Wei, Hai-Zhen(haizhenwei@nju.edu.cn) ; Zhang, Feifei(fzhang@nju.edu.cn)
英文摘要Barium isotopes (8138Ba) obtained in carbonates have a great potential for reconstructing past changes in marine productivity and associated biogeochemical cycling. Although coral skeletons and inorganic carbonates have been used as archives for seawater Ba isotopes, few studies have investigated other confounding factors that influence Ba isotope fractionation (e.g., vital effects and carbonate mineralogy), hindering their use as paleo-proxies. In this paper, we report Ba isotope data for multi-species corals, including paired sets of living and fossil coral skeletons in the inner shelf (Paipu Reef, Hainan Island) and the open-sea (Jiuzhang Reef corals) in the South China Sea (SCS). We also present Ba isotope datasets of bulk carbonate sediments from two shallow-water drill cores (A and B) in the Jiuzhang Reefs, SCS. The 8138Ba data for the Paipu Reef corals have a relatively narrow range of values (0.12%o to 0.21%o, mean 0.17 +/- 0.06%o; 2 SD, n = 8) regardless of living and fossil coral skeletons. The corals of Jiuzhang Reef show a relatively consistent 8138Ba value (0.30 +/- 0.04%o; 2 SD, n = 4). The coral skeletal 8138Ba values show no significant differences across multiple species within the individual colony, which suggests that vital effects do not affect coral 8138Ba records. These findings, together with the fact that a relatively constant 8138Ba offset exists between coral skeletons and seawater, indicate that coral skeletons may be reliable archives for past seawater 8138Ba. All bulk carbonate sediment samples yield constant 8138Ba values of 0.38 +/- 0.04%o (2 SD, n = 30) with a fairly consistent deviation (A138Babulk_carb-sw =-0.21 +/- 0.04%o) from the reported typical surface seawater of SCS. In addition, mass balance calculation suggests that Ba isotope frac-tionation between inorganic High-Mg calcite (HMC) and seawater is derived to be A138BaHMC-sw =-0.13 +/- 0.12%o, exhibiting a difference less than A138Baaragonite-sw =-0.28 +/- 0.04%o in aragonite precipitation. Our findings suggest that shallow-water carbonates are reliable archives of past seawater 8138Ba when considering Ba isotope deviations during marine carbonate deposition.
WOS关键词ORGANIC-CARBON ; TRACE-ELEMENTS ; BARIUM ; FRACTIONATION ; ARAGONITE ; PRECIPITATION ; PROXY ; DISSOLUTION ; CHEMISTRY ; EVOLUTION
资助项目National Key Research and Development Program of China[2021YFA0718100] ; National Key Research and Development Program of China[2021YFC3100603] ; National Natural Science Foundation of China[41973005] ; National Natural Science Foundation of China[42002002] ; Fundamental Research Funds for Central Universities[14380154] ; Fundamental Research Funds for Central Universities[14380125] ; Frontiers Science Center for Critical Earth Material Cycling Fund[DLTD2102] ; Frontiers Science Center for Critical Earth Material Cycling Fund[2022300193]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
出版者ELSEVIER
WOS记录号WOS:000860662900001
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for Central Universities ; Frontiers Science Center for Critical Earth Material Cycling Fund
源URL[http://ir.nigpas.ac.cn/handle/332004/41310]  
专题中国科学院南京地质古生物研究所
通讯作者Wei, Hai-Zhen; Zhang, Feifei
作者单位1.China Univ Geosci, Sch Earth Resources, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
2.Nanjing Univ, Sch Geog & Ocean Sci, Nanjing 210023, Peoples R China
3.Nanjing Inst Geol & Palaeontol, Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
4.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
5.CAS Ctr Excellence Comparat Planetol, Anhui 230026, Peoples R China
6.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing 210023, Peoples R China
7.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China
推荐引用方式
GB/T 7714		 Lin, Yi-Bo,Wei, Hai-Zhen,Zhang, Feifei,et al. Evaluation of shallow-water corals and associated carbonate sediments as seawater Ba isotope archives in the South China Sea[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2022,605:11.
APA Lin, Yi-Bo.,Wei, Hai-Zhen.,Zhang, Feifei.,Hohl, Simon V..,Wei, Guang-Yi.,...&Jiang, Shao-Yong.(2022).Evaluation of shallow-water corals and associated carbonate sediments as seawater Ba isotope archives in the South China Sea.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,605,11.
MLA Lin, Yi-Bo,et al."Evaluation of shallow-water corals and associated carbonate sediments as seawater Ba isotope archives in the South China Sea".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 605(2022):11.

入库方式： OAI收割

来源：南京地质古生物研究所

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