Stable oxygen isotope ratios of marine barite from Cenozoic sediments
We report new data on oxygen isotopes in marine sulfate (delta18O[SO4]), measured in marine barite (BaSO4), over the Cenozoic. The delta18O[SO4] varies by 6x over the Cenozoic, with major peaks 3, 15, 30 and 55 Ma. The delta18O[SO4] does not co-vary with the delta18O[SO4], emphasizing that different...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.707885 2023-05-15T18:21:21+02:00 Stable oxygen isotope ratios of marine barite from Cenozoic sediments Turchyn, Alexandra V Schrag, Daniel P MEDIAN LATITUDE: 0.905819 * MEDIAN LONGITUDE: -173.702020 * SOUTH-BOUND LATITUDE: -64.517000 * WEST-BOUND LONGITUDE: 3.099900 * NORTH-BOUND LATITUDE: 32.441800 * EAST-BOUND LONGITUDE: -113.842000 * DATE/TIME START: 1982-03-22T00:00:00 * DATE/TIME END: 2001-11-14T00:00:00 2006-11-24 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.707885 https://doi.org/10.1594/PANGAEA.707885 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.707885 https://doi.org/10.1594/PANGAEA.707885 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Turchyn, Alexandra V; Schrag, Daniel P (2006): Cenozoic evolution of the sulfur cycle: Insight from oxygen isotopes in marine sulfate. Earth and Planetary Science Letters, 241(3-4), 763-779, https://doi.org/10.1016/j.epsl.2005.11.007 113-689B 143-865B 199-1218A 85-572D 85-573B 85-574_Site 85-575_Site 86-577 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg143 Leg199 Leg85 Leg86 North Pacific North Pacific/FLANK North Pacific/TROUGH North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.707885 https://doi.org/10.1016/j.epsl.2005.11.007 2023-01-20T07:31:16Z We report new data on oxygen isotopes in marine sulfate (delta18O[SO4]), measured in marine barite (BaSO4), over the Cenozoic. The delta18O[SO4] varies by 6x over the Cenozoic, with major peaks 3, 15, 30 and 55 Ma. The delta18O[SO4] does not co-vary with the delta18O[SO4], emphasizing that different processes control the oxygen and sulfur isotopic composition of sulfate. This indicates that temporal changes in the delta18O[SO4] over the Cenozoic must reflect changes in the isotopic fractionation associated with the sulfide reoxidation pathway. This suggests that variations in the aerial extent of different types of organic-rich sediments may have a significant impact on the biogeochemical sulfur cycle and emphasizes that the sulfur cycle is less sensitive to net organic carbon burial than to changes in the conditions of that organic carbon burial. The delta18O[SO4] also does not co-vary with the d18O measured in benthic foraminifera, emphasizing that oxygen isotopes in water and sulfate remain out of equilibrium over the lifetime of sulfate in the ocean. A simple box model was used to explore dynamics of the marine sulfur cycle with respect to both oxygen and sulfur isotopes over the Cenozoic. We interpret variability in the delta18O[SO4] to reflect changes in the aerial distribution of conditions within organic-rich sediments, from periods with more localized, organic-rich sediments, to periods with more diffuse organic carbon burial. While these changes may not impact the net organic carbon burial, they will greatly affect the way that sulfur is processed within organic-rich sediments, impacting the sulfide reoxidation pathway and thus the delta18O[SO4]. Our qualitative interpretation of the record suggests that sulfate concentrations were probably lower earlier in the Cenozoic. Dataset South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(3.099900,-113.842000,32.441800,-64.517000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
113-689B 143-865B 199-1218A 85-572D 85-573B 85-574_Site 85-575_Site 86-577 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg143 Leg199 Leg85 Leg86 North Pacific North Pacific/FLANK North Pacific/TROUGH North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
113-689B 143-865B 199-1218A 85-572D 85-573B 85-574_Site 85-575_Site 86-577 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg143 Leg199 Leg85 Leg86 North Pacific North Pacific/FLANK North Pacific/TROUGH North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean Turchyn, Alexandra V Schrag, Daniel P Stable oxygen isotope ratios of marine barite from Cenozoic sediments |
topic_facet |
113-689B 143-865B 199-1218A 85-572D 85-573B 85-574_Site 85-575_Site 86-577 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg143 Leg199 Leg85 Leg86 North Pacific North Pacific/FLANK North Pacific/TROUGH North Pacific Ocean Ocean Drilling Program ODP South Atlantic Ocean |
description |
We report new data on oxygen isotopes in marine sulfate (delta18O[SO4]), measured in marine barite (BaSO4), over the Cenozoic. The delta18O[SO4] varies by 6x over the Cenozoic, with major peaks 3, 15, 30 and 55 Ma. The delta18O[SO4] does not co-vary with the delta18O[SO4], emphasizing that different processes control the oxygen and sulfur isotopic composition of sulfate. This indicates that temporal changes in the delta18O[SO4] over the Cenozoic must reflect changes in the isotopic fractionation associated with the sulfide reoxidation pathway. This suggests that variations in the aerial extent of different types of organic-rich sediments may have a significant impact on the biogeochemical sulfur cycle and emphasizes that the sulfur cycle is less sensitive to net organic carbon burial than to changes in the conditions of that organic carbon burial. The delta18O[SO4] also does not co-vary with the d18O measured in benthic foraminifera, emphasizing that oxygen isotopes in water and sulfate remain out of equilibrium over the lifetime of sulfate in the ocean. A simple box model was used to explore dynamics of the marine sulfur cycle with respect to both oxygen and sulfur isotopes over the Cenozoic. We interpret variability in the delta18O[SO4] to reflect changes in the aerial distribution of conditions within organic-rich sediments, from periods with more localized, organic-rich sediments, to periods with more diffuse organic carbon burial. While these changes may not impact the net organic carbon burial, they will greatly affect the way that sulfur is processed within organic-rich sediments, impacting the sulfide reoxidation pathway and thus the delta18O[SO4]. Our qualitative interpretation of the record suggests that sulfate concentrations were probably lower earlier in the Cenozoic. |
format |
Dataset |
author |
Turchyn, Alexandra V Schrag, Daniel P |
author_facet |
Turchyn, Alexandra V Schrag, Daniel P |
author_sort |
Turchyn, Alexandra V |
title |
Stable oxygen isotope ratios of marine barite from Cenozoic sediments |
title_short |
Stable oxygen isotope ratios of marine barite from Cenozoic sediments |
title_full |
Stable oxygen isotope ratios of marine barite from Cenozoic sediments |
title_fullStr |
Stable oxygen isotope ratios of marine barite from Cenozoic sediments |
title_full_unstemmed |
Stable oxygen isotope ratios of marine barite from Cenozoic sediments |
title_sort |
stable oxygen isotope ratios of marine barite from cenozoic sediments |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.707885 https://doi.org/10.1594/PANGAEA.707885 |
op_coverage |
MEDIAN LATITUDE: 0.905819 * MEDIAN LONGITUDE: -173.702020 * SOUTH-BOUND LATITUDE: -64.517000 * WEST-BOUND LONGITUDE: 3.099900 * NORTH-BOUND LATITUDE: 32.441800 * EAST-BOUND LONGITUDE: -113.842000 * DATE/TIME START: 1982-03-22T00:00:00 * DATE/TIME END: 2001-11-14T00:00:00 |
long_lat |
ENVELOPE(3.099900,-113.842000,32.441800,-64.517000) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Supplement to: Turchyn, Alexandra V; Schrag, Daniel P (2006): Cenozoic evolution of the sulfur cycle: Insight from oxygen isotopes in marine sulfate. Earth and Planetary Science Letters, 241(3-4), 763-779, https://doi.org/10.1016/j.epsl.2005.11.007 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.707885 https://doi.org/10.1594/PANGAEA.707885 |
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.707885 https://doi.org/10.1016/j.epsl.2005.11.007 |
_version_ |
1766200562941952000 |