Age model and stable isotope record of DSDP holes 48-401 and 86-577
Early Paleogene warm climates may have been linked to different modes and sources of deepwater formation. Warm polar temperatures of the Paleocene and Eocene may have resulted from either increased atmospheric trace gases or increased heat transport through deep and intermediate waters. The possibil...
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1992
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728114 2023-05-15T17:31:01+02:00 Age model and stable isotope record of DSDP holes 48-401 and 86-577 Pak, Dorothy K Miller, Kenneth G MEDIAN LATITUDE: 18.915520 * MEDIAN LONGITUDE: 59.806180 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: -8.810300 * NORTH-BOUND LATITUDE: 47.427500 * EAST-BOUND LONGITUDE: 157.723300 * DATE/TIME START: 1976-06-06T00:00:00 * DATE/TIME END: 1987-01-21T07:00:00 1992-09-24 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.728114 https://doi.org/10.1594/PANGAEA.728114 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728114 https://doi.org/10.1594/PANGAEA.728114 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Pak, Dorothy K; Miller, Kenneth G (1992): Paleocene to Eocene benthic foraminiferal isotopes and assemblages: implications for deepwater circulation. Paleoceanography, 7(4), 405-422, https://doi.org/10.1029/92PA01234 113-690B 48-401 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg48 Leg86 North Atlantic/TERRACE North Pacific Ocean Drilling Program ODP South Atlantic Ocean Dataset 1992 ftpangaea https://doi.org/10.1594/PANGAEA.728114 https://doi.org/10.1029/92PA01234 2023-01-20T07:31:31Z Early Paleogene warm climates may have been linked to different modes and sources of deepwater formation. Warm polar temperatures of the Paleocene and Eocene may have resulted from either increased atmospheric trace gases or increased heat transport through deep and intermediate waters. The possibility of increasing ocean heat transport through the production of warm saline deep waters (WSDW) in the Tethyan region has generated considerable interest. In addition, General Circulation Model results indicate that deepwater source regions may be highly sensitive to changing basin configurations. To decipher deepwater changes, we examined detailed benthic foraminiferal faunal and isotopic records of the late Paleocene through the early Eocene (~60 to 50 Ma) from two critical regions: the North Atlantic (Bay of Biscay Site 401) and the Pacific (Shatsky Rise Site 577). These records are compared with published data from the Southern Ocean (Maud Rise Site 690, Islas Orcadas Rise Site 702). During the late Paleocene, similar benthic foraminiferal delta18O values were recorded at all four sites. This indicates uniform deepwater temperatures, consistent with a single source of deep water. The highest delta13C values were recorded in the Southern Ocean and were 0.5 per mil more positive than those of the Pacific. We infer that the Southern Ocean was proximal to a source of nutrient-depleted deep water during the late Paleocene. Upper Paleocene Reflector Ab was cut on the western Bermuda Rise by cyclonically circulating bottom water, also suggesting a vigorous source of bottom water in the Southern Ocean. A dramatic negative excursion in both carbon and oxygen isotopes occurred in the latest Paleocene in the Southern Ocean. This is a short-term (<100 kyr), globally synchronous event which also is apparent in both the Atlantic and Pacific records as a carbon isotopic excursion of approximately 1 per mil. Faunal analyses from the North Atlantic and Pacific sites indicate that the largest benthic foraminiferal faunal ... Dataset North Atlantic South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean Pacific Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) Islas Orcadas Rise ENVELOPE(-26.000,-26.000,-51.500,-51.500) Orcadas Rise ENVELOPE(-26.000,-26.000,-51.500,-51.500) ENVELOPE(-8.810300,157.723300,47.427500,-65.161000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
113-690B 48-401 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg48 Leg86 North Atlantic/TERRACE North Pacific Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
113-690B 48-401 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg48 Leg86 North Atlantic/TERRACE North Pacific Ocean Drilling Program ODP South Atlantic Ocean Pak, Dorothy K Miller, Kenneth G Age model and stable isotope record of DSDP holes 48-401 and 86-577 |
topic_facet |
113-690B 48-401 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg113 Leg48 Leg86 North Atlantic/TERRACE North Pacific Ocean Drilling Program ODP South Atlantic Ocean |
description |
Early Paleogene warm climates may have been linked to different modes and sources of deepwater formation. Warm polar temperatures of the Paleocene and Eocene may have resulted from either increased atmospheric trace gases or increased heat transport through deep and intermediate waters. The possibility of increasing ocean heat transport through the production of warm saline deep waters (WSDW) in the Tethyan region has generated considerable interest. In addition, General Circulation Model results indicate that deepwater source regions may be highly sensitive to changing basin configurations. To decipher deepwater changes, we examined detailed benthic foraminiferal faunal and isotopic records of the late Paleocene through the early Eocene (~60 to 50 Ma) from two critical regions: the North Atlantic (Bay of Biscay Site 401) and the Pacific (Shatsky Rise Site 577). These records are compared with published data from the Southern Ocean (Maud Rise Site 690, Islas Orcadas Rise Site 702). During the late Paleocene, similar benthic foraminiferal delta18O values were recorded at all four sites. This indicates uniform deepwater temperatures, consistent with a single source of deep water. The highest delta13C values were recorded in the Southern Ocean and were 0.5 per mil more positive than those of the Pacific. We infer that the Southern Ocean was proximal to a source of nutrient-depleted deep water during the late Paleocene. Upper Paleocene Reflector Ab was cut on the western Bermuda Rise by cyclonically circulating bottom water, also suggesting a vigorous source of bottom water in the Southern Ocean. A dramatic negative excursion in both carbon and oxygen isotopes occurred in the latest Paleocene in the Southern Ocean. This is a short-term (<100 kyr), globally synchronous event which also is apparent in both the Atlantic and Pacific records as a carbon isotopic excursion of approximately 1 per mil. Faunal analyses from the North Atlantic and Pacific sites indicate that the largest benthic foraminiferal faunal ... |
format |
Dataset |
author |
Pak, Dorothy K Miller, Kenneth G |
author_facet |
Pak, Dorothy K Miller, Kenneth G |
author_sort |
Pak, Dorothy K |
title |
Age model and stable isotope record of DSDP holes 48-401 and 86-577 |
title_short |
Age model and stable isotope record of DSDP holes 48-401 and 86-577 |
title_full |
Age model and stable isotope record of DSDP holes 48-401 and 86-577 |
title_fullStr |
Age model and stable isotope record of DSDP holes 48-401 and 86-577 |
title_full_unstemmed |
Age model and stable isotope record of DSDP holes 48-401 and 86-577 |
title_sort |
age model and stable isotope record of dsdp holes 48-401 and 86-577 |
publisher |
PANGAEA |
publishDate |
1992 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728114 https://doi.org/10.1594/PANGAEA.728114 |
op_coverage |
MEDIAN LATITUDE: 18.915520 * MEDIAN LONGITUDE: 59.806180 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: -8.810300 * NORTH-BOUND LATITUDE: 47.427500 * EAST-BOUND LONGITUDE: 157.723300 * DATE/TIME START: 1976-06-06T00:00:00 * DATE/TIME END: 1987-01-21T07:00:00 |
long_lat |
ENVELOPE(3.000,3.000,-66.000,-66.000) ENVELOPE(-44.717,-44.717,-60.750,-60.750) ENVELOPE(-26.000,-26.000,-51.500,-51.500) ENVELOPE(-26.000,-26.000,-51.500,-51.500) ENVELOPE(-8.810300,157.723300,47.427500,-65.161000) |
geographic |
Southern Ocean Pacific Maud Rise Orcadas Islas Orcadas Rise Orcadas Rise |
geographic_facet |
Southern Ocean Pacific Maud Rise Orcadas Islas Orcadas Rise Orcadas Rise |
genre |
North Atlantic South Atlantic Ocean Southern Ocean |
genre_facet |
North Atlantic South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Pak, Dorothy K; Miller, Kenneth G (1992): Paleocene to Eocene benthic foraminiferal isotopes and assemblages: implications for deepwater circulation. Paleoceanography, 7(4), 405-422, https://doi.org/10.1029/92PA01234 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728114 https://doi.org/10.1594/PANGAEA.728114 |
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.728114 https://doi.org/10.1029/92PA01234 |
_version_ |
1766128321389658112 |