Elderfield, Henry; Bertram, Caroline J; Erez, Jonathan (1996): Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.708384, Supplement to: Elderfield, H et al. (1996): A biomineralization model for the incorporation of trace elements into foraminiferal calcium carbonate. Earth and Planetary Science Letters, 142(3-4), 409-423, https://doi.org/10.1016/0012-821X(96)00105-7
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Abstract:
Measurements of Sr/Ca of benthic foraminifera show a linear decrease with water depth which is superimposed upon significant variability identified by analyses of individual foraminifera. New data for Cd/Ca support previous work in defining a contrast between waters shallower and deeper than ~2500 m. Measured element partition coefficients in foraminiferal calcium carbonate relative to sea water (D) have been described by means of a one-box model in which elements are extracted by Rayleigh distillation from a biomineralization reservoir that serves for calcification with a constant fractionation factor (alpha), such that D = (1 - f**alpha)/(l - f), where f is the proportion of Ca remaining after precipitation. A modification to the model recognises differences in element speciation. The model is consistent with differences between D[Sr], D[Ba], and D[Cd] in benthic but not planktonic foraminifera. Depth variations in D for Sr and Ba are consistent with the model, as are differences in depth variation of D[Cd] in calcitic and aragonitic benthic foraminifera. The shallower depth variations may reflect increasing calcification rates with increasing water depth to an optimum of about 2500 m. Observations of unusually lower DCd for some deep waters, not accompanied by similar [Sr], or D[Ba] may be because of dissolution or a calcification response to a lower carbonate saturation state.
Project(s):
Joint Global Ocean Flux Study (JGOFS)
Coverage:
Median Latitude: 22.214398 * Median Longitude: 16.758348 * South-bound Latitude: -4.000000 * West-bound Longitude: -132.480254 * North-bound Latitude: 72.183000 * East-bound Longitude: 161.770200
Date/Time Start: 1966-05-22T00:00:00 * Date/Time End: 1989-08-10T00:00:00
Event(s):
BOFS5K (BOFS11882#4) * Latitude: 50.687600 * Longitude: -21.863500 * Date/Time: 1989-07-26T00:00:00 * Elevation: -3547.0 m * Location: Northeast Atlantic * Campaign: D184 * Basis: Discovery (1962) * Method/Device: Kasten corer (KAL) * Comment: BOFS-ID 5332
BOFS10K (BOFS11890#2) * Latitude: 54.667100 * Longitude: -20.654400 * Date/Time: 1989-08-01T00:00:00 * Elevation: -2761.0 m * Location: Northeast Atlantic * Campaign: D184 * Basis: Discovery (1962) * Method/Device: Kasten corer (KAL) * Comment: BOFS-ID 5676
BOFS14K (BOFS11896#1) * Latitude: 58.628800 * Longitude: -19.434900 * Date/Time: 1989-08-03T00:00:00 * Elevation: -1756.0 m * Location: Northeast Atlantic * Campaign: D184 * Basis: Discovery (1962) * Method/Device: Kasten corer (KAL) * Comment: BOFS-ID 5865
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Elderfield, H; Bertram, CJ; Erez, J (1996): (Appendix A) Cd/Ca ratios of benthic foraminifera from surface deep-sea sediments. https://doi.org/10.1594/PANGAEA.708383
- Elderfield, H; Bertram, CJ; Erez, J (1996): (Appendix A) Sr/Ca ratios of benthic foraminifera from surface deep-sea sediments. https://doi.org/10.1594/PANGAEA.708382