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Boron isotopic fractionation in laboratory inorganic carbonate precipitation: evidence for the incorporation of B(OH)(3) into carbonate
Xiao YingKai1,2; Li HuaLing1,3; Liu WeiGuo4; Wang XiuFang1; Jiang ShaoYong5
2008-12-01
发表期刊SCIENCE IN CHINA SERIES D-EARTH SCIENCES
卷号51期号:12页码:1776-1785
文章类型Article
摘要A laboratory inorganic carbonate precipitation experiment at high pH of 8.96 to 9.34 was conducted, and the boron isotopic fractionations of the precipitated carbonate were measured. The data show that boron isotopic fractionation factors (alpha(carb-3)) between carbonate and B(OH)(3) in seawater range 0.937 and 0.965, with an average value of 0.953. Our results together with those reported by Sanyal and collaborators show that the alpha(carb-3) values between carbonate and B(OH)(3) in solution are not constant but are negatively correlated with the pH of seawater. The measured boron isotopic compositions of carbonate precipitation (delta 11B(carb)) do not exactly lie on the best-fit theoretical delta 11B(4)-pH curves and neither do they exactly parallel any theoretical delta 11B(4)-pH curves. Therefore, it is reasonable to argue that a changeable proportion of B(OH)(3) with pH of seawater should also be incorporated into carbonate except for the dominant incorporation of B(OH)(4) - in carbonate. Hence, in the reconstruction of the paleo-pH of seawater from boron isotopes in marine biogenic carbonates, the use of theoretical boron isotopic fractionation factor (alpha(4-3)) between B(OH)(4-) and B(OH)(3) is not suitable. Instead, an empirical equation should be established.
关键词Boron Isotopic Fractionation Biogenic Carbonate b(Oh)(3) Incorporation
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]SYNTHETIC CALCIUM-CARBONATE ; PARTITION-FUNCTION RATIOS ; MOLECULAR-ORBITAL THEORY ; BORIC ACIDS ; PH CONTROL ; OCEAN PH ; SEAWATER ; EXCHANGE ; FORAMINIFERA ; PROXY
收录类别SCI
语种英语
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000261176800012
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/5847
专题青海盐湖研究所知识仓储
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
3.Nanjing Inst Geol & Mineral Resources, Nanjing 210016, Peoples R China
4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
5.Nanjing Univ, Dept Earth Sci, State Key Lab Mineral Deposits Res, Nanjing 210093, Peoples R China
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GB/T 7714
Xiao YingKai,Li HuaLing,Liu WeiGuo,et al. Boron isotopic fractionation in laboratory inorganic carbonate precipitation: evidence for the incorporation of B(OH)(3) into carbonate[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2008,51(12):1776-1785.
APA Xiao YingKai,Li HuaLing,Liu WeiGuo,Wang XiuFang,&Jiang ShaoYong.(2008).Boron isotopic fractionation in laboratory inorganic carbonate precipitation: evidence for the incorporation of B(OH)(3) into carbonate.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,51(12),1776-1785.
MLA Xiao YingKai,et al."Boron isotopic fractionation in laboratory inorganic carbonate precipitation: evidence for the incorporation of B(OH)(3) into carbonate".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 51.12(2008):1776-1785.
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