Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206
ODP Site 1124, located 600 km east of the North Island of New Zealand, records post-middle Oligocene variations in the Pacific Deep Western Boundary Current (DWBC) and New Zealand's climatic and tectonic evolution. Sediment parameters, such as terrigenous grain size, flux, magnetic fabric, and...
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Online Access: | https://dx.doi.org/10.1594/pangaea.734781 https://doi.pangaea.de/10.1594/PANGAEA.734781 |
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ftdatacite:10.1594/pangaea.734781 2023-05-15T13:40:55+02:00 Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206 Joseph, Leah H Rea, David K van der Pluijm, Ben A 2004 application/zip https://dx.doi.org/10.1594/pangaea.734781 https://doi.pangaea.de/10.1594/PANGAEA.734781 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/s0025-3227(04)00023-4 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Composite Core Leg181 Joides Resolution Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 2004 ftdatacite https://doi.org/10.1594/pangaea.734781 https://doi.org/10.1016/s0025-3227(04)00023-4 2022-02-08T16:24:46Z ODP Site 1124, located 600 km east of the North Island of New Zealand, records post-middle Oligocene variations in the Pacific Deep Western Boundary Current (DWBC) and New Zealand's climatic and tectonic evolution. Sediment parameters, such as terrigenous grain size, flux, magnetic fabric, and non-depositional episodes, are used to interpret DWBC intensity and Antarctic climate. Interpretations of DWBC velocities indicate that the Antarctic Circumpolar Current reached modern intensities at ~23 Ma, as the tectonic seaways expanded, completing the thermal isolation of Antarctica. Periods of more intense bottom water formation are suggested by the presence of hiatuses formed under the DWBC at 22.5-17.6, 16.5-15, and 14-11 Ma. The oldest interval of high current intensity occurs within a climatically warm period during which the intensity of thermohaline circulation around Antarctica increased as a result of recent opening of circum-Antarctic gateways. The younger hiatuses represent glacial periods on Antarctica and major fluctuations in the East Antarctic Ice Sheet, whereas intervals around the hiatuses represent times of relative warmth, but with continued current activity. The period between 11 to 9 Ma is characterized by conditions surrounding a high velocity DWBC around the time of the formation and stabilization of the West Antarctic Ice Sheet. The increased terrigenous input may result from either changing Antarctic conditions or more direct sediment transport from New Zealand. The Pacific DWBC did not exert a major influence on sedimentation at Site 1124 from 9 Ma to the present; the late Miocene to Pleistocene sequence is more influenced by the climatic and tectonic history of New Zealand. Despite the apparent potential for increased sediment supply to this site from changes in sediment channeling, increasing rates of mountain uplift, and volcanic activity, terrigenous fluxes remain low and constant throughout this younger period. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Antarctic East Antarctic Ice Sheet New Zealand Pacific The Antarctic West Antarctic Ice Sheet |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Composite Core Leg181 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Composite Core Leg181 Joides Resolution Ocean Drilling Program ODP Joseph, Leah H Rea, David K van der Pluijm, Ben A Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206 |
topic_facet |
Composite Core Leg181 Joides Resolution Ocean Drilling Program ODP |
description |
ODP Site 1124, located 600 km east of the North Island of New Zealand, records post-middle Oligocene variations in the Pacific Deep Western Boundary Current (DWBC) and New Zealand's climatic and tectonic evolution. Sediment parameters, such as terrigenous grain size, flux, magnetic fabric, and non-depositional episodes, are used to interpret DWBC intensity and Antarctic climate. Interpretations of DWBC velocities indicate that the Antarctic Circumpolar Current reached modern intensities at ~23 Ma, as the tectonic seaways expanded, completing the thermal isolation of Antarctica. Periods of more intense bottom water formation are suggested by the presence of hiatuses formed under the DWBC at 22.5-17.6, 16.5-15, and 14-11 Ma. The oldest interval of high current intensity occurs within a climatically warm period during which the intensity of thermohaline circulation around Antarctica increased as a result of recent opening of circum-Antarctic gateways. The younger hiatuses represent glacial periods on Antarctica and major fluctuations in the East Antarctic Ice Sheet, whereas intervals around the hiatuses represent times of relative warmth, but with continued current activity. The period between 11 to 9 Ma is characterized by conditions surrounding a high velocity DWBC around the time of the formation and stabilization of the West Antarctic Ice Sheet. The increased terrigenous input may result from either changing Antarctic conditions or more direct sediment transport from New Zealand. The Pacific DWBC did not exert a major influence on sedimentation at Site 1124 from 9 Ma to the present; the late Miocene to Pleistocene sequence is more influenced by the climatic and tectonic history of New Zealand. Despite the apparent potential for increased sediment supply to this site from changes in sediment channeling, increasing rates of mountain uplift, and volcanic activity, terrigenous fluxes remain low and constant throughout this younger period. |
format |
Article in Journal/Newspaper |
author |
Joseph, Leah H Rea, David K van der Pluijm, Ben A |
author_facet |
Joseph, Leah H Rea, David K van der Pluijm, Ben A |
author_sort |
Joseph, Leah H |
title |
Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206 |
title_short |
Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206 |
title_full |
Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206 |
title_fullStr |
Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206 |
title_full_unstemmed |
Age data of ODP Site 181-1124, supplement to: Joseph, Leah H; Rea, David K; van der Pluijm, Ben A (2004): Neogene history of the deep western boundary current at Rekohu sediment drift, southwest Pacific (ODP Site 1124). Marine Geology, 205(1-4), 185-206 |
title_sort |
age data of odp site 181-1124, supplement to: joseph, leah h; rea, david k; van der pluijm, ben a (2004): neogene history of the deep western boundary current at rekohu sediment drift, southwest pacific (odp site 1124). marine geology, 205(1-4), 185-206 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2004 |
url |
https://dx.doi.org/10.1594/pangaea.734781 https://doi.pangaea.de/10.1594/PANGAEA.734781 |
geographic |
Antarctic East Antarctic Ice Sheet New Zealand Pacific The Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic East Antarctic Ice Sheet New Zealand Pacific The Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_relation |
https://dx.doi.org/10.1016/s0025-3227(04)00023-4 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.734781 https://doi.org/10.1016/s0025-3227(04)00023-4 |
_version_ |
1766143267853828096 |