Boron isotopic fractionation in laboratory inorganic carbonate precipitation: evidence for the incorporation of B(OH)(3) into carbonate

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 青海盐湖研究所知识仓储

	Boron isotopic fractionation in laboratory inorganic carbonate precipitation: evidence for the incorporation of B(OH)(3) into carbonate
	Xiao YingKai 1,2; Li HuaLing 1,3; Liu WeiGuo 4; Wang XiuFang 1; Jiang ShaoYong 5
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2008-12-01
卷号	51 期号:12 页码:1776-1785
关键词	Boron Isotopic Fractionation Biogenic Carbonate b(Oh)(3) Incorporation
文献子类	Article
英文摘要	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.
WOS关键词	SYNTHETIC CALCIUM-CARBONATE ; PARTITION-FUNCTION RATIOS ; MOLECULAR-ORBITAL THEORY ; BORIC ACIDS ; PH CONTROL ; OCEAN PH ; SEAWATER ; EXCHANGE ; FORAMINIFERA ; PROXY
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000261176800012
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/5847]
专题	青海盐湖研究所_青海盐湖研究所知识仓储中国科学院青海盐湖研究所
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
推荐引用方式 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.