Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments
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...
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1996
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.708384 https://doi.org/10.1594/PANGAEA.708384 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.708384 2023-05-15T17:41:41+02:00 Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments Elderfield, Henry Bertram, Caroline J Erez, Jonathan 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 1996-12-05 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.708384 https://doi.org/10.1594/PANGAEA.708384 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.708384 https://doi.org/10.1594/PANGAEA.708384 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Elderfield, Henry; Bertram, Caroline J; Erez, Jonathan (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 BC Biogeochemical Ocean Flux Study BOFS BOFS10K BOFS11882#4 BOFS11890#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K Box corer Charles Darwin D184 Discovery (1962) JGOFS Joint Global Ocean Flux Study KAL Kasten corer NEAP NEAP-02B NEAP-05B NEAP-08B NEAP-10B NEAP-18B NEAP-19B NEAP-20B Northeast Atlantic Pacific Ocean PC Piston corer TR163-31 V22 V22-197 V27 V27-60 Vema Dataset 1996 ftpangaea https://doi.org/10.1594/PANGAEA.708384 https://doi.org/10.1016/0012-821X(96)00105-7 2023-01-20T07:31:17Z 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. Dataset Northeast Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-132.480254,161.770200,72.183000,-4.000000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
BC Biogeochemical Ocean Flux Study BOFS BOFS10K BOFS11882#4 BOFS11890#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K Box corer Charles Darwin D184 Discovery (1962) JGOFS Joint Global Ocean Flux Study KAL Kasten corer NEAP NEAP-02B NEAP-05B NEAP-08B NEAP-10B NEAP-18B NEAP-19B NEAP-20B Northeast Atlantic Pacific Ocean PC Piston corer TR163-31 V22 V22-197 V27 V27-60 Vema |
spellingShingle |
BC Biogeochemical Ocean Flux Study BOFS BOFS10K BOFS11882#4 BOFS11890#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K Box corer Charles Darwin D184 Discovery (1962) JGOFS Joint Global Ocean Flux Study KAL Kasten corer NEAP NEAP-02B NEAP-05B NEAP-08B NEAP-10B NEAP-18B NEAP-19B NEAP-20B Northeast Atlantic Pacific Ocean PC Piston corer TR163-31 V22 V22-197 V27 V27-60 Vema Elderfield, Henry Bertram, Caroline J Erez, Jonathan Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments |
topic_facet |
BC Biogeochemical Ocean Flux Study BOFS BOFS10K BOFS11882#4 BOFS11890#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K Box corer Charles Darwin D184 Discovery (1962) JGOFS Joint Global Ocean Flux Study KAL Kasten corer NEAP NEAP-02B NEAP-05B NEAP-08B NEAP-10B NEAP-18B NEAP-19B NEAP-20B Northeast Atlantic Pacific Ocean PC Piston corer TR163-31 V22 V22-197 V27 V27-60 Vema |
description |
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. |
format |
Dataset |
author |
Elderfield, Henry Bertram, Caroline J Erez, Jonathan |
author_facet |
Elderfield, Henry Bertram, Caroline J Erez, Jonathan |
author_sort |
Elderfield, Henry |
title |
Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments |
title_short |
Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments |
title_full |
Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments |
title_fullStr |
Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments |
title_full_unstemmed |
Sr/Ca and Cd/Ca ratios of benthic foraminifera in surface deep-sea sediments |
title_sort |
sr/ca and cd/ca ratios of benthic foraminifera in surface deep-sea sediments |
publisher |
PANGAEA |
publishDate |
1996 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.708384 https://doi.org/10.1594/PANGAEA.708384 |
op_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 |
long_lat |
ENVELOPE(-132.480254,161.770200,72.183000,-4.000000) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Northeast Atlantic Planktonic foraminifera |
genre_facet |
Northeast Atlantic Planktonic foraminifera |
op_source |
Supplement to: Elderfield, Henry; Bertram, Caroline J; Erez, Jonathan (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 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.708384 https://doi.org/10.1594/PANGAEA.708384 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.708384 https://doi.org/10.1016/0012-821X(96)00105-7 |
_version_ |
1766143369589817344 |