Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608
The North Atlantic at present is ventilated by overflow of the Denmark Strait, Iceland-Faeroe Ridge, Faeroe Bank Channel, and Wyville-Thompson Ridge. The evolution of Cenozoic abyssal circulation of this region was related to tectonic opening and subsidence of these sills. We used d13C records of th...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.788720 2023-05-15T16:00:40+02:00 Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608 Miller, Kenneth G Fairbanks, Richard G Thomas, Ellen MEDIAN LATITUDE: 30.101150 * MEDIAN LONGITUDE: -62.436087 * SOUTH-BOUND LATITUDE: -0.498700 * WEST-BOUND LONGITUDE: 158.511500 * NORTH-BOUND LATITUDE: 45.031700 * EAST-BOUND LONGITUDE: -7.974800 * DATE/TIME START: 1969-12-15T00:00:00 * DATE/TIME END: 1983-07-13T00:00:00 1987-09-17 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.788720 https://doi.org/10.1594/PANGAEA.788720 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.788720 https://doi.org/10.1594/PANGAEA.788720 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Miller, Kenneth G; Fairbanks, Richard G; Thomas, Ellen (1987): Benthic foraminiferal carbon isotopic records and the development of abyssal circulation in the Eastern North Atlantic. In: Ruddiman, WF; Kidd, RB; Thomas, E; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 94, 981-996, https://doi.org/10.2973/dsdp.proc.94.132.1987 Deep Sea Drilling Project DSDP Dataset 1987 ftpangaea https://doi.org/10.1594/PANGAEA.788720 https://doi.org/10.2973/dsdp.proc.94.132.1987 2023-01-20T07:32:43Z The North Atlantic at present is ventilated by overflow of the Denmark Strait, Iceland-Faeroe Ridge, Faeroe Bank Channel, and Wyville-Thompson Ridge. The evolution of Cenozoic abyssal circulation of this region was related to tectonic opening and subsidence of these sills. We used d13C records of the benthic foraminifer Cibicidoides to decipher the timing of tectonically controlled changes in bottom-water circulation in the eastern basins (Biscay and Iberian) of the northern North Atlantic. Records from Site 608 (Kings Trough, northeastern North Atlantic) show that from about 24 to 15 Ma (early to early middle Miocene), d13C values in the Kings Trough area were depleted relative to western North Atlantic values and were more similar to Pacific d13C values. This reflects less ventilation of the Kings Trough region as compared to the well-oxygenated western North Atlantic. Comparison of Oligocene d13C records from Site 119 (Bay of Biscay) with western North Atlantic records suggests that the eastern basin was also relatively isolated prior to 24 Ma. At about 15 Ma, d13C values at Site 608 attained values similar to the western North Atlantic, indicating increased eastern basin ventilation in the middle Miocene. This increased advection into the eastern basin predated a major d18O increase which occurred at about 14.6 Ma. Subsidence estimates of the Greenland-Scotland Ridge indicate that the deepening of the Iceland-Faeroe Ridge was coincident with the marked change in eastern basin deep-water ventilation. Dataset Denmark Strait Greenland Greenland-Scotland Ridge Iceland North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Greenland Pacific Thompson Ridge ENVELOPE(-146.083,-146.083,-76.450,-76.450) ENVELOPE(158.511500,-7.974800,45.031700,-0.498700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Deep Sea Drilling Project DSDP |
spellingShingle |
Deep Sea Drilling Project DSDP Miller, Kenneth G Fairbanks, Richard G Thomas, Ellen Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608 |
topic_facet |
Deep Sea Drilling Project DSDP |
description |
The North Atlantic at present is ventilated by overflow of the Denmark Strait, Iceland-Faeroe Ridge, Faeroe Bank Channel, and Wyville-Thompson Ridge. The evolution of Cenozoic abyssal circulation of this region was related to tectonic opening and subsidence of these sills. We used d13C records of the benthic foraminifer Cibicidoides to decipher the timing of tectonically controlled changes in bottom-water circulation in the eastern basins (Biscay and Iberian) of the northern North Atlantic. Records from Site 608 (Kings Trough, northeastern North Atlantic) show that from about 24 to 15 Ma (early to early middle Miocene), d13C values in the Kings Trough area were depleted relative to western North Atlantic values and were more similar to Pacific d13C values. This reflects less ventilation of the Kings Trough region as compared to the well-oxygenated western North Atlantic. Comparison of Oligocene d13C records from Site 119 (Bay of Biscay) with western North Atlantic records suggests that the eastern basin was also relatively isolated prior to 24 Ma. At about 15 Ma, d13C values at Site 608 attained values similar to the western North Atlantic, indicating increased eastern basin ventilation in the middle Miocene. This increased advection into the eastern basin predated a major d18O increase which occurred at about 14.6 Ma. Subsidence estimates of the Greenland-Scotland Ridge indicate that the deepening of the Iceland-Faeroe Ridge was coincident with the marked change in eastern basin deep-water ventilation. |
format |
Dataset |
author |
Miller, Kenneth G Fairbanks, Richard G Thomas, Ellen |
author_facet |
Miller, Kenneth G Fairbanks, Richard G Thomas, Ellen |
author_sort |
Miller, Kenneth G |
title |
Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608 |
title_short |
Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608 |
title_full |
Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608 |
title_fullStr |
Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608 |
title_full_unstemmed |
Benthic foraminiferal carbon isotopic records and the development of abyssal circulation at DSDP Sites 9-77, 12-119, 30-289, 82-563 and 94-608 |
title_sort |
benthic foraminiferal carbon isotopic records and the development of abyssal circulation at dsdp sites 9-77, 12-119, 30-289, 82-563 and 94-608 |
publisher |
PANGAEA |
publishDate |
1987 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.788720 https://doi.org/10.1594/PANGAEA.788720 |
op_coverage |
MEDIAN LATITUDE: 30.101150 * MEDIAN LONGITUDE: -62.436087 * SOUTH-BOUND LATITUDE: -0.498700 * WEST-BOUND LONGITUDE: 158.511500 * NORTH-BOUND LATITUDE: 45.031700 * EAST-BOUND LONGITUDE: -7.974800 * DATE/TIME START: 1969-12-15T00:00:00 * DATE/TIME END: 1983-07-13T00:00:00 |
long_lat |
ENVELOPE(-146.083,-146.083,-76.450,-76.450) ENVELOPE(158.511500,-7.974800,45.031700,-0.498700) |
geographic |
Greenland Pacific Thompson Ridge |
geographic_facet |
Greenland Pacific Thompson Ridge |
genre |
Denmark Strait Greenland Greenland-Scotland Ridge Iceland North Atlantic |
genre_facet |
Denmark Strait Greenland Greenland-Scotland Ridge Iceland North Atlantic |
op_source |
Supplement to: Miller, Kenneth G; Fairbanks, Richard G; Thomas, Ellen (1987): Benthic foraminiferal carbon isotopic records and the development of abyssal circulation in the Eastern North Atlantic. In: Ruddiman, WF; Kidd, RB; Thomas, E; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 94, 981-996, https://doi.org/10.2973/dsdp.proc.94.132.1987 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.788720 https://doi.org/10.1594/PANGAEA.788720 |
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.788720 https://doi.org/10.2973/dsdp.proc.94.132.1987 |
_version_ |
1766396687295709184 |