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Environmental controls on B/Ca in calcite tests of the tropical planktic foraminifer species Globigerinoides ruber and Globigerinoides sacculifer

Allen, Katherine A.; Hoenisch, Baerbel; Eggins, Stephen; Rosenthal, Y


The ratio of boron to calcium (B/Ca) in the calcite tests of planktic foraminifers may serve as a proxy for past seawater chemistry, but controls on B incorporation are not yet certain. Here we present the results of laboratory culture experiments with live specimens of Globigerinoides ruber (pink) and Globigerinoides sacculifer, which provide new insight into B incorporation controls. We find that in G. sacculifer, B/Ca increases with increasing pH (lower [HCO 3-], higher [CO 32-] and [B(OH)...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2012.07.004


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