Skip to content

Research at St Andrews

Evaluating the utility of B/Ca ratios in planktic foraminifera as a proxy for the carbonate system: a case study of Globigerinoides ruber

Research output: Contribution to journalArticle

DOI

Open Access permissions

Open

Author(s)

M.J. Henehan, G.L. Foster, J.W.B. Rae, K.C. Prentice, J. Erez, H.C. Bostock, B.J. Marshall, P.A. Wilson

School/Research organisations

Abstract

B/Ca ratios in foraminifera have attracted considerable scientific attention as a proxy for past ocean carbonate system. However, the carbonate system controls on B/Ca ratios are not straightforward, with Δ[ CO32-] ([ CO32-]in situ - [ CO32-]at saturation) correlating best with B/Ca ratios in benthic foraminifera, rather than pH, B(OH)4-/HCO3-, or B(OH)4-/DIC (as a simple model of boron speciation in seawater and incorporation into CaCO3 would predict). Furthermore, culture experiments have shown that in planktic foraminifera properties such as salinity and [B]SW can have profound effects on B/Ca ratios beyond those predicted by simple partition coefficients. Here, we investigate the controls on B/Ca ratios in G. ruber via a combination of culture experiments and core-top measurements, and add to a growing body of evidence that suggests B/Ca ratios in symbiont-bearing foraminiferal carbonate are not a straightforward proxy for past seawater carbonate system conditions. We find that while B/Ca ratios in culture experiments covary with pH, in open ocean sediments this relationship is not seen. In fact, our B/Ca data correlate best with [ PO43-] (a previously undocumented association) and in most regions, salinity. These findings might suggest a precipitation rate or crystallographic control on boron incorporation into foraminiferal calcite. Regardless, our results underscore the need for caution when attempting to interpret B/Ca records in terms of the ocean carbonate system, at the very least in the case of mixed-layer planktic foraminifera.

Close

Details

Original languageEnglish
Pages (from-to)1052-1069
JournalGeochemistry, Geophysics, Geosystems
Volume16
Issue number4
Early online date4 Apr 2015
DOIs
Publication statusPublished - Apr 2015

    Research areas

  • Globigerinoides ruber, B/Ca ratios, Planktic foraminifera, pH proxy, Trace elements, Proxy calibration

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Atmosphere-ocean CO2 exchange across the last deglaciation from the boron isotope proxy

    Shao, J., Stott, L. D., Gray, W. R., Greenop, R., Pecher, I., Neil, H. L., Coffin, R. B., Davy, B. & Rae, J. W. B., 4 Sep 2019, (Accepted/In press) In : Paleoceanography and Paleoclimatology. In press

    Research output: Contribution to journalArticle

  2. Discharge of meteoric water in the eastern Norwegian Sea since the last glacial period

    Hong, W-L., Lepland, A., Himmler, T., Kim, J-H., Chand, S., Sahy, D., Solomon, E. A., Rae, J. W. B., Martma, T., Nam, S-I. & Knies, J., 19 Jul 2019, In : Geophysical Research Letters. 46, 11 p.

    Research output: Contribution to journalArticle

  3. CO2 storage and release in the deep Southern Ocean on millennial to centennial timescales

    Rae, J. W. B., Burke, A., Robinson, L. F., Adkins, J. F., Chen, T., Cole, C., Greenop, R., Li, T., Littley, E., Nita, D. C., Stewart, J. A. & Taylor, B., 24 Oct 2018, In : Nature. 562, p. 569-573 16 p.

    Research output: Contribution to journalLetter

  4. The effect of ocean acidification on tropical coral calcification: insights from calcification fluid DIC chemistry

    Allison, N., Cole, C., Hintz, C., Hintz, K., Rae, J. & Finch, A., 10 Oct 2018, In : Chemical Geology. 497, p. 162-169 8 p.

    Research output: Contribution to journalArticle

  5. Distribution and ecology of planktic foraminifera in the North Pacific: implications for paleo-reconstructions

    Taylor, B. J., Rae, J. W. B., Gray, W. R., Darling, K., Burke, A., Gersonde, R., Abelmann, A., Maier, E., Esper, O. & Ziveri, P., 1 Jul 2018, In : Quaternary Science Reviews. 191, p. 256-274 19 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Geochemistry, Geophysics, Geosystems (Journal)

    Nora Nell Hanson (Reviewer)
    2014

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

Related by journal

  1. Generation of Earth's early continents from a relatively cool Archean mantle

    Piccolo, A., Palin, R. M., Kaus, B. J. P. & White, R. W., 1 Apr 2019, In : Geochemistry, Geophysics, Geosystems. 20, 4, p. 1679-1697

    Research output: Contribution to journalArticle

  2. Mixing and crystal scavenging in the Main Ethiopian Rift revealed by trace element systematics in feldspars and glasses

    Iddon, F., Jackson, C., Hutchison, W., Fontijn, K., Pyle, D. M., Mather, T. A., Yirgu, G. & Edmonds, M., 11 Jan 2019, In : Geochemistry, Geophysics, Geosystems. Early View, 30 p.

    Research output: Contribution to journalArticle

  3. Pinpointing deep geothermal upflow in zones of complex tectono-volcanic degassing: new insights from Aluto volcano, Main Ethiopian Rift

    Jolie, E., Hutchison, W., Driba, D. L., Jentsch, A. & Gizaw, B., 21 Aug 2019, In : Geochemistry, Geophysics, Geosystems. Early View, 16 p.

    Research output: Contribution to journalArticle

  4. Evolving mantle sources in postcollisional early Permian-Triassic magmatic rocks in the heart of of Tianshan Orogen (western China)

    Tang, G-J., Cawood, P. A., Wyman, D. A., Wang, Q. & Zhao, Z-H., Nov 2017, In : Geochemistry, Geophysics, Geosystems. 18, 11, p. 4110-4122 13 p.

    Research output: Contribution to journalArticle

  5. Causes of unrest at silicic calderas in the East African Rift: new constraints from InSAR and soil-gas chemistry at Aluto volcano, Ethiopia

    Hutchison, W., Biggs, J., Mather, T. A., Pyle, D. M., Lewi, E., Yirgu, G., Caliro, S., Chiodini, G., Clor, L. E. & Fischer, T. P., Aug 2016, In : Geochemistry, Geophysics, Geosystems. 17, 8, p. 3008-3030

    Research output: Contribution to journalArticle

ID: 206403674