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