Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C
Published stable isotope records in marine carbonate are characterized by a positive d18O excursion associated with a negative d13C shift during the early Maastrichtian. However, the cause and even the precise timing of these excursions remain uncertain. We have generated high-resolution foraminifer...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.753191 2024-09-15T18:36:32+00:00 Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C Friedrich, Oliver Herrle, Jens O Wilson, Paul A Cooper, Matthew J Erbacher, Jochen Hemleben, Christoph MEDIAN LATITUDE: -47.115350 * MEDIAN LONGITUDE: 2.095050 * SOUTH-BOUND LATITUDE: -65.160000 * WEST-BOUND LONGITUDE: 1.204800 * NORTH-BOUND LATITUDE: -29.070700 * EAST-BOUND LONGITUDE: 2.985300 * DATE/TIME START: 1980-06-10T00:00:00 * DATE/TIME END: 1987-01-23T20:30:00 2009 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.753191 https://doi.org/10.1594/PANGAEA.753191 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.753191 https://doi.org/10.1594/PANGAEA.753191 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Friedrich, Oliver; Herrle, Jens O; Wilson, Paul A; Cooper, Matthew J; Erbacher, Jochen; Hemleben, Christoph (2009): Early Maastrichtian carbon cycle perturbation and cooling event: Implications from the South Atlantic Ocean. Paleoceanography, 24(2), PA2211, https://doi.org/10.1029/2008PA001654 113-690C 74-525A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg74 Ocean Drilling Program ODP South Atlantic/CREST South Atlantic Ocean dataset publication series 2009 ftpangaea https://doi.org/10.1594/PANGAEA.75319110.1029/2008PA001654 2024-07-24T02:31:20Z Published stable isotope records in marine carbonate are characterized by a positive d18O excursion associated with a negative d13C shift during the early Maastrichtian. However, the cause and even the precise timing of these excursions remain uncertain. We have generated high-resolution foraminiferal stable isotope and gray-scale records for the latest Campanian to early Maastrichtian (73-68 Ma) at two Ocean Drilling Program sites, 525 (Walvis Ridge) and 690 (Weddell Sea). We demonstrate that the negative d13C excursion is decoupled from the d18O increase with a lag of about 600 ka. Our d13C records (both planktic and benthic) show an amplitude for the negative excursion of 0.7 per mill that falls between about 72.1 and 70.7 Ma. Our planktic d18O records indicate an overall increase of 1.2 per mill from 73 to 68 Ma at Site 690, whereas at Site 525 they record a slightly smaller increase (1 per mill) that peaks around 70.1 Ma with decreasing values thereafter. Our benthic d18O data indicate an increase of 1.5 per mill at Site 525 and 0.7 per mill at Site 690 between about 71.4 and 69.9 Ma. Benthic d18O values show different baseline values at the two sites before and after the excursion, but the larger increase at Site 525 means that the values attained at the peak of the excursion are similar at the two sites. We interpret this observation in terms of water mass changes. The excursion is interpreted to reflect a cooling of bottom waters in response to the strengthening contribution of intermediate- to deep-water production in the high southern latitudes rather than increased ice volume. The associated carbon cycle perturbations that we observe are interpreted to reflect a weakening of surface water stratification and increased productivity, as supported by our gray value data. Other/Unknown Material South Atlantic Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(1.204800,2.985300,-29.070700,-65.160000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
113-690C 74-525A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg74 Ocean Drilling Program ODP South Atlantic/CREST South Atlantic Ocean |
spellingShingle |
113-690C 74-525A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg74 Ocean Drilling Program ODP South Atlantic/CREST South Atlantic Ocean Friedrich, Oliver Herrle, Jens O Wilson, Paul A Cooper, Matthew J Erbacher, Jochen Hemleben, Christoph Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C |
topic_facet |
113-690C 74-525A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg74 Ocean Drilling Program ODP South Atlantic/CREST South Atlantic Ocean |
description |
Published stable isotope records in marine carbonate are characterized by a positive d18O excursion associated with a negative d13C shift during the early Maastrichtian. However, the cause and even the precise timing of these excursions remain uncertain. We have generated high-resolution foraminiferal stable isotope and gray-scale records for the latest Campanian to early Maastrichtian (73-68 Ma) at two Ocean Drilling Program sites, 525 (Walvis Ridge) and 690 (Weddell Sea). We demonstrate that the negative d13C excursion is decoupled from the d18O increase with a lag of about 600 ka. Our d13C records (both planktic and benthic) show an amplitude for the negative excursion of 0.7 per mill that falls between about 72.1 and 70.7 Ma. Our planktic d18O records indicate an overall increase of 1.2 per mill from 73 to 68 Ma at Site 690, whereas at Site 525 they record a slightly smaller increase (1 per mill) that peaks around 70.1 Ma with decreasing values thereafter. Our benthic d18O data indicate an increase of 1.5 per mill at Site 525 and 0.7 per mill at Site 690 between about 71.4 and 69.9 Ma. Benthic d18O values show different baseline values at the two sites before and after the excursion, but the larger increase at Site 525 means that the values attained at the peak of the excursion are similar at the two sites. We interpret this observation in terms of water mass changes. The excursion is interpreted to reflect a cooling of bottom waters in response to the strengthening contribution of intermediate- to deep-water production in the high southern latitudes rather than increased ice volume. The associated carbon cycle perturbations that we observe are interpreted to reflect a weakening of surface water stratification and increased productivity, as supported by our gray value data. |
format |
Other/Unknown Material |
author |
Friedrich, Oliver Herrle, Jens O Wilson, Paul A Cooper, Matthew J Erbacher, Jochen Hemleben, Christoph |
author_facet |
Friedrich, Oliver Herrle, Jens O Wilson, Paul A Cooper, Matthew J Erbacher, Jochen Hemleben, Christoph |
author_sort |
Friedrich, Oliver |
title |
Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C |
title_short |
Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C |
title_full |
Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C |
title_fullStr |
Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C |
title_full_unstemmed |
Stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern Atlantic of DSDP Hole 74-525A and ODP Hole 113-690C |
title_sort |
stable oxygen and carbon isotope data for planktic and benthic foraminifera from southern atlantic of dsdp hole 74-525a and odp hole 113-690c |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.753191 https://doi.org/10.1594/PANGAEA.753191 |
op_coverage |
MEDIAN LATITUDE: -47.115350 * MEDIAN LONGITUDE: 2.095050 * SOUTH-BOUND LATITUDE: -65.160000 * WEST-BOUND LONGITUDE: 1.204800 * NORTH-BOUND LATITUDE: -29.070700 * EAST-BOUND LONGITUDE: 2.985300 * DATE/TIME START: 1980-06-10T00:00:00 * DATE/TIME END: 1987-01-23T20:30:00 |
long_lat |
ENVELOPE(1.204800,2.985300,-29.070700,-65.160000) |
genre |
South Atlantic Ocean Weddell Sea |
genre_facet |
South Atlantic Ocean Weddell Sea |
op_source |
Supplement to: Friedrich, Oliver; Herrle, Jens O; Wilson, Paul A; Cooper, Matthew J; Erbacher, Jochen; Hemleben, Christoph (2009): Early Maastrichtian carbon cycle perturbation and cooling event: Implications from the South Atlantic Ocean. Paleoceanography, 24(2), PA2211, https://doi.org/10.1029/2008PA001654 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.753191 https://doi.org/10.1594/PANGAEA.753191 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.75319110.1029/2008PA001654 |
_version_ |
1810480208069787648 |