Potential of Foraminiferal B/Ca Ratios for Reconstructing Paleo-seawater pH and CO2-3 Concentrations
Received date: 2012-05-10
Revised date: 2012-05-21
Online published: 2012-06-10
The analysis of foraminiferal B/Ca ratios is a greatly potential and widely concerned paleoceanographic method, which is applicable to the reconstruction of the past pH and CO2-3 concentrations of sea water, and under certain situations also can also be used to reflect the changes of the atmospheric CO2 concentration from surface water, and indicate changes of ocean current and water mass of deep water. Compared with the conventional method of boron isotopes, the B/Ca ratio method is relatively easier, more stable, and less affected less by dissolution and postdeposition alternations. As a result, it is relatively suitable for highresolution paleoceanographic studies. However, this method is comparably new. The foraminiferal biological processes to absorb boron element is still not very clear. Moreover, the mechanisms using B/Ca ratio to reconstruct pH and CO2-3 concentrations is not well accepted. As the method is constructed on the basis of empirical function, establishment of its theoretical basis will be the future and important development of this method.
Key words： Foraminifera shell; B/Ca ratio; pH value; CO2-3 ; concentration
Qiao Peijun, Wang Tingting, Jian Zhimin . Potential of Foraminiferal B/Ca Ratios for Reconstructing Paleo-seawater pH and CO2-3 Concentrations[J]. Advances in Earth Science, 2012 , 27(6) : 686 -693 . DOI: 10.11867/j.issn.1001-8166.2012.06.0686
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