Sr/Ca ratios of Cenozoic benthic foraminifera
A Cenozoic multi-species record of benthic foraminiferal calcite Sr/Ca has been produced and is corrected for interspecific offsets (typically less than 0.3 mmol/mol) and for the linear relationship between decreasing benthic foraminiferal Sr/Ca and increasing water depth. The water depth correction...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.708380 https://doi.org/10.1594/PANGAEA.708380 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.708380 2023-05-15T17:33:16+02:00 Sr/Ca ratios of Cenozoic benthic foraminifera Lear, Caroline H Elderfield, Henry Wilson, Paul A MEDIAN LATITUDE: -10.639641 * MEDIAN LONGITUDE: -28.523640 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: -133.309500 * NORTH-BOUND LATITUDE: 58.628800 * EAST-BOUND LONGITUDE: 5.183000 * DATE/TIME START: 1970-09-12T00:00:00 * DATE/TIME END: 1997-02-06T04:30:00 2003-12-05 application/zip, 10 datasets https://doi.pangaea.de/10.1594/PANGAEA.708380 https://doi.org/10.1594/PANGAEA.708380 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.708380 https://doi.org/10.1594/PANGAEA.708380 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lear, Caroline H; Elderfield, Henry; Wilson, Paul A (2003): A Cenozoic seawater Sr/Ca record from benthic foraminiferal calcite and its application in determining global weathering fluxes. Earth and Planetary Science Letters, 208(1-2), 69-84, https://doi.org/10.1016/S0012-821X(02)01156-1 113-689B 113-690B 113-690C 154-926A 154-926C 171-1052B 171-1052F 73-522 73-523 74-525A 85-573 85-573B 94-608 Biogeochemical Ocean Flux Study Blake Nose North Atlantic Ocean BOFS BOFS11882#4 BOFS11886#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K BOFS8K D184 Deep Sea Drilling Project Discovery (1962) DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution KAL Kasten corer Leg113 Leg154 Leg171B Leg73 Leg74 Leg85 Leg94 North Atlantic/FLANK Northeast Atlantic North Pacific/TROUGH Ocean Drilling Program ODP PC Piston corer Dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.708380 https://doi.org/10.1016/S0012-821X(02)01156-1 2023-01-20T07:31:17Z A Cenozoic multi-species record of benthic foraminiferal calcite Sr/Ca has been produced and is corrected for interspecific offsets (typically less than 0.3 mmol/mol) and for the linear relationship between decreasing benthic foraminiferal Sr/Ca and increasing water depth. The water depth correction, determined from Holocene, Late Glacial Maximum and Eocene paleowater-depth transects, is ~0.1 mmol/mol/km. The corrected Cenozoic benthic foraminiferal Sr/Ca record ranges from 1.2 to 2.0 mmol/mol, and has been interpreted in terms of long-term changes in seawater Sr/Ca, enabling issues related to higher-resolution variability in Sr/Ca to be ignored. We estimate that seawater Sr/Ca was ~1.5 times modern values in the late Cretaceous, but declined rapidly into the Paleogene. Following a minimum in the Eocene, seawater Sr/Ca increased gradually through to the present day with a minimum superimposed on this trend centered in the late Miocene. By assuming scenarios for changing seawater calcium concentration, and using published carbonate accumulation rate data combined with suitable values for Sr partition coefficients into carbonates, the seawater Sr/Ca record is used to estimate global average river Sr fluxes. These fluxes are used in conjunction with the seawater strontium isotope curve and estimates of hydrothermal activity/tectonic outgassing to calculate changes in global average river 87Sr/86Sr through the Cenozoic. The absolute magnitude of Sr fluxes and isotopic compositions calculated in this way are subject to relatively large uncertainties. Nevertheless, our results suggest that river Sr flux increased from 35 Ma to the present day (roughly two-fold) accompanied by an overall increase in 87Sr/86Sr (by ~0 to 0.001). Between 75 and 35 Ma, river 87Sr/86Sr also increased (by ~0.001 to 0.002) but was accompanied by a decrease (two- to three-fold) in river Sr flux. Dataset North Atlantic Northeast Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-133.309500,5.183000,58.628800,-65.161000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
113-689B 113-690B 113-690C 154-926A 154-926C 171-1052B 171-1052F 73-522 73-523 74-525A 85-573 85-573B 94-608 Biogeochemical Ocean Flux Study Blake Nose North Atlantic Ocean BOFS BOFS11882#4 BOFS11886#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K BOFS8K D184 Deep Sea Drilling Project Discovery (1962) DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution KAL Kasten corer Leg113 Leg154 Leg171B Leg73 Leg74 Leg85 Leg94 North Atlantic/FLANK Northeast Atlantic North Pacific/TROUGH Ocean Drilling Program ODP PC Piston corer |
spellingShingle |
113-689B 113-690B 113-690C 154-926A 154-926C 171-1052B 171-1052F 73-522 73-523 74-525A 85-573 85-573B 94-608 Biogeochemical Ocean Flux Study Blake Nose North Atlantic Ocean BOFS BOFS11882#4 BOFS11886#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K BOFS8K D184 Deep Sea Drilling Project Discovery (1962) DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution KAL Kasten corer Leg113 Leg154 Leg171B Leg73 Leg74 Leg85 Leg94 North Atlantic/FLANK Northeast Atlantic North Pacific/TROUGH Ocean Drilling Program ODP PC Piston corer Lear, Caroline H Elderfield, Henry Wilson, Paul A Sr/Ca ratios of Cenozoic benthic foraminifera |
topic_facet |
113-689B 113-690B 113-690C 154-926A 154-926C 171-1052B 171-1052F 73-522 73-523 74-525A 85-573 85-573B 94-608 Biogeochemical Ocean Flux Study Blake Nose North Atlantic Ocean BOFS BOFS11882#4 BOFS11886#2 BOFS11896#1 BOFS11905#1 BOFS14K BOFS17K BOFS5K BOFS8K D184 Deep Sea Drilling Project Discovery (1962) DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution KAL Kasten corer Leg113 Leg154 Leg171B Leg73 Leg74 Leg85 Leg94 North Atlantic/FLANK Northeast Atlantic North Pacific/TROUGH Ocean Drilling Program ODP PC Piston corer |
description |
A Cenozoic multi-species record of benthic foraminiferal calcite Sr/Ca has been produced and is corrected for interspecific offsets (typically less than 0.3 mmol/mol) and for the linear relationship between decreasing benthic foraminiferal Sr/Ca and increasing water depth. The water depth correction, determined from Holocene, Late Glacial Maximum and Eocene paleowater-depth transects, is ~0.1 mmol/mol/km. The corrected Cenozoic benthic foraminiferal Sr/Ca record ranges from 1.2 to 2.0 mmol/mol, and has been interpreted in terms of long-term changes in seawater Sr/Ca, enabling issues related to higher-resolution variability in Sr/Ca to be ignored. We estimate that seawater Sr/Ca was ~1.5 times modern values in the late Cretaceous, but declined rapidly into the Paleogene. Following a minimum in the Eocene, seawater Sr/Ca increased gradually through to the present day with a minimum superimposed on this trend centered in the late Miocene. By assuming scenarios for changing seawater calcium concentration, and using published carbonate accumulation rate data combined with suitable values for Sr partition coefficients into carbonates, the seawater Sr/Ca record is used to estimate global average river Sr fluxes. These fluxes are used in conjunction with the seawater strontium isotope curve and estimates of hydrothermal activity/tectonic outgassing to calculate changes in global average river 87Sr/86Sr through the Cenozoic. The absolute magnitude of Sr fluxes and isotopic compositions calculated in this way are subject to relatively large uncertainties. Nevertheless, our results suggest that river Sr flux increased from 35 Ma to the present day (roughly two-fold) accompanied by an overall increase in 87Sr/86Sr (by ~0 to 0.001). Between 75 and 35 Ma, river 87Sr/86Sr also increased (by ~0.001 to 0.002) but was accompanied by a decrease (two- to three-fold) in river Sr flux. |
format |
Dataset |
author |
Lear, Caroline H Elderfield, Henry Wilson, Paul A |
author_facet |
Lear, Caroline H Elderfield, Henry Wilson, Paul A |
author_sort |
Lear, Caroline H |
title |
Sr/Ca ratios of Cenozoic benthic foraminifera |
title_short |
Sr/Ca ratios of Cenozoic benthic foraminifera |
title_full |
Sr/Ca ratios of Cenozoic benthic foraminifera |
title_fullStr |
Sr/Ca ratios of Cenozoic benthic foraminifera |
title_full_unstemmed |
Sr/Ca ratios of Cenozoic benthic foraminifera |
title_sort |
sr/ca ratios of cenozoic benthic foraminifera |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.708380 https://doi.org/10.1594/PANGAEA.708380 |
op_coverage |
MEDIAN LATITUDE: -10.639641 * MEDIAN LONGITUDE: -28.523640 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: -133.309500 * NORTH-BOUND LATITUDE: 58.628800 * EAST-BOUND LONGITUDE: 5.183000 * DATE/TIME START: 1970-09-12T00:00:00 * DATE/TIME END: 1997-02-06T04:30:00 |
long_lat |
ENVELOPE(-133.309500,5.183000,58.628800,-65.161000) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
Supplement to: Lear, Caroline H; Elderfield, Henry; Wilson, Paul A (2003): A Cenozoic seawater Sr/Ca record from benthic foraminiferal calcite and its application in determining global weathering fluxes. Earth and Planetary Science Letters, 208(1-2), 69-84, https://doi.org/10.1016/S0012-821X(02)01156-1 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.708380 https://doi.org/10.1594/PANGAEA.708380 |
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.708380 https://doi.org/10.1016/S0012-821X(02)01156-1 |
_version_ |
1766131731925041152 |