海洋生物碳酸盐δ11B-pH技术影响因素

肖军; 肖应凯; 刘丛强; 贺茂勇

doi:10.3724/SP.J.1140.2010.04215

海洋生物碳酸盐δ11B-pH技术影响因素

1 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室, 西安 710075;

2 中国科学院青海盐湖研究所中国科学院盐湖资源与化学重点实验室, 西宁 810008;

3 中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550002

基金项目:
中国科学院地球环境研究所创新基金(O951071293)

国家自然科学基金项目(40573013)

详细信息

作者简介: 肖军(1980-),男,助理研究员,从事同位素地球化学研究,E-mail:xiaojun@ieecas.cn

中图分类号: P597

收稿日期: 2009-11-09

修回日期: 2010-02-11

STUDY OF INFLUENCE FACTORS ON δ11B-PH TECHNIQUE FOR MARINE BIO-CARBONATE DEPOSITS

1 Institute of Earth Environment, Chinese Academy of Science, Xi'an 710075;

2 Qinghai Institute of Salt Lakes, Chinese Academy of Science, Xining 810008;

3 Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002

Received Date: 09 November 2009

Revised Date: 11 February 2010

摘要

摘要: 20世纪90年代以来,利用海洋生物碳酸盐的硼同位素组成重建古海水pH的δ11B-pH技术已成为国际同位素地球化学研究的热点。虽然该技术取得了很多的研究成果,但由于理论上的不完善,使该技术中存在一些尚未解决的问题,限制了该技术的近一步应用。综合近些年来的研究成果,对δ11B-pH技术中的不确定因素:海水B (OH)3的电离常数pKa、海水的δ11Bsw值、海水中B (OH)4-的δ11B值和海水B (OH)4-与B (OH)3间的分馏系数α进行了详细研究,提出了该技术今后研究的方向,为更好地利用海洋生物碳酸盐的硼同位素组成研究古海洋环境提供参考。
- 海洋生物碳酸盐 /
- 硼同位素 /
- δ¹¹B-pH技术 /
- 古海水pH
Abstract: Since 1990's,it has become a hotspot to use the δ11B-pH technique to reconstruct the pH of seawater through δ11B in marine biogenetic carbonates.Although plenty of papers have been devoted to this topic,there are still a lot of technical problems due to the incompletion in theory, that constrain the further application of the method. We discussed in this paper some uncertain factors of the δ11B-PH technique, including the pKa, ionization constant of B(OH)3,δ11Bsw of the seawater,δ11B in B(OH)4-,and the fractionation factor α between B(OH)4- and B(OH)3.Suggestions are made for future studies to improve the method for paleoceangraphic investigations.
- Marine biogenefic carbonate /
- δ¹¹B-PH technique /
- pH of seawater /

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海洋生物碳酸盐δ11B-pH技术影响因素

作者简介: 肖军(1980-),男,助理研究员,从事同位素地球化学研究,E-mail:xiaojun@ieecas.cn

STUDY OF INFLUENCE FACTORS ON δ11B-PH TECHNIQUE FOR MARINE BIO-CARBONATE DEPOSITS

1 Institute of Earth Environment, Chinese Academy of Science, Xi'an 710075; 2 Qinghai Institute of Salt Lakes, Chinese Academy of Science, Xining 810008; 3 Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002

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1 Institute of Earth Environment, Chinese Academy of Science, Xi'an 710075;

2 Qinghai Institute of Salt Lakes, Chinese Academy of Science, Xining 810008;

3 Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002