(Table 1) Elemental composition of benthic foraminifera from South Atlantic core top samples, supplement to: Raitzsch, Markus; Kuhnert, Henning; Hathorne, Ed C; Groeneveld, Jeroen; Bickert, Torsten (2011): U/Ca in benthic foraminifers: A proxy for the deep-sea carbonate saturation. Geochemistry, Geophysics, Geosystems, 12(6)


The ocean plays a major role in the global carbon cycle, and attempts to reconstruct past changes in the marine carbonate system are increasing. The speciation of dissolved uranium is sensitive to variations in carbonate system parameters, and previous studies have shown that this is recorded in the uranium-to-calcium ratio (U/Ca) of the calcite shells of planktonic foraminifera. Here we test whether U/Ca ratios of deep-sea benthic foraminifera are equally suited as an indicator of the carbonate system. We compare U/Ca in two common benthic foraminifer species (Planulina wuellerstorfi and Cibicidoides mundulus) from South Atlantic core top samples with the calcite saturation state (Delta [CO32-] = [CO32-]in situ - [CO32-]sat) of the ambient seawater and find significant negative correlations for both species. Compared with planktonic foraminifera, the sensitivity of U/Ca in benthic foraminifera to changes in Delta [CO32-] is about 1 order of magnitude higher. Although Delta [CO3**2-] exerts the dominant control on the average foraminiferal U/Ca, the intertest and intratest variability indicates the presence of additional factors forcing U/Ca.

standard deviation=standard error of the mean.Partition coefficient DU = (U/Cashell)/(U/Caseawater) using a U/Caseawater = 1390 nmol/mol [Ku et al., 1977].*Outlier not used in regressions.

DOI https://doi.pangaea.de/10.1594/PANGAEA.762797
Related Identifier https://doi.org/10.1029/2010GC003344
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.762797
Creator Raitzsch, Markus; Kuhnert, Henning; Hathorne, Ed C; Groeneveld, Jeroen; Bickert, Torsten
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2011
Funding Reference German Science Foundation
Rights Data access is restricted (moratorium, sensitive data, license constraints)
OpenAccess false
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 337 data points
Discipline Earth System Research
Spatial Coverage (-58.518W, -48.013S, 13.828E, -1.665N); Walvis Ridge; Equatorial Atlantic; Brazil Basin; Namibia Continental Margin; Namibia continental slope; Slope off Argentina; Mid Atlantic Ridge; Vema Channel; Continental slope off Brazil; western South Atlantic
Temporal Coverage Begin 1988-03-12T00:00:00Z
Temporal Coverage End 2000-01-31T08:10:00Z