Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean
New geochronometers are needed for sediments of the Arctic Ocean spanning at least the last half million years, largely because oxygen-isotope stratigraphy is relatively ineffective in this ocean, and because other dating techniques require significant assumptions about sedimentation rates. Multi-al...
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Format: | Dataset |
Language: | English |
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PANGAEA
2007
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.669644 https://doi.org/10.1594/PANGAEA.669644 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.669644 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
88-BC22 88-GGC23 89-BC11 92-BC17 94-BC16 94-BC17 94-BC19 94-BC20 94-BC28 Amundsen Basin Antarctic Ocean Arctic Ocean ARK-IV/3 ARK-VIII/3 BC Box corer Gakkel Ridge GGC Giant box corer Giant gravity corer Giant piston corer GIK21524-2 PS11/364-2 GIK21533-3 PS11/412 GKG GPC Gravity corer (Kiel type) KAL Kasten corer Lomonosov Ridge Morris Jesup Rise Polarstern PS11 PS1524-2 PS1533-3 PS19/157 PS19/160 PS19/165 PS19/175 PS19/186 PS19/206 PS19/218 PS19/222 PS19/228 PS19 ARCTIC91 PS2163-2 PS2166-2 PS2170-1 PS2177-1 |
spellingShingle |
88-BC22 88-GGC23 89-BC11 92-BC17 94-BC16 94-BC17 94-BC19 94-BC20 94-BC28 Amundsen Basin Antarctic Ocean Arctic Ocean ARK-IV/3 ARK-VIII/3 BC Box corer Gakkel Ridge GGC Giant box corer Giant gravity corer Giant piston corer GIK21524-2 PS11/364-2 GIK21533-3 PS11/412 GKG GPC Gravity corer (Kiel type) KAL Kasten corer Lomonosov Ridge Morris Jesup Rise Polarstern PS11 PS1524-2 PS1533-3 PS19/157 PS19/160 PS19/165 PS19/175 PS19/186 PS19/206 PS19/218 PS19/222 PS19/228 PS19 ARCTIC91 PS2163-2 PS2166-2 PS2170-1 PS2177-1 Berger, Glenn W Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean |
topic_facet |
88-BC22 88-GGC23 89-BC11 92-BC17 94-BC16 94-BC17 94-BC19 94-BC20 94-BC28 Amundsen Basin Antarctic Ocean Arctic Ocean ARK-IV/3 ARK-VIII/3 BC Box corer Gakkel Ridge GGC Giant box corer Giant gravity corer Giant piston corer GIK21524-2 PS11/364-2 GIK21533-3 PS11/412 GKG GPC Gravity corer (Kiel type) KAL Kasten corer Lomonosov Ridge Morris Jesup Rise Polarstern PS11 PS1524-2 PS1533-3 PS19/157 PS19/160 PS19/165 PS19/175 PS19/186 PS19/206 PS19/218 PS19/222 PS19/228 PS19 ARCTIC91 PS2163-2 PS2166-2 PS2170-1 PS2177-1 |
description |
New geochronometers are needed for sediments of the Arctic Ocean spanning at least the last half million years, largely because oxygen-isotope stratigraphy is relatively ineffective in this ocean, and because other dating techniques require significant assumptions about sedimentation rates. Multi-aliquot luminescence sediment-dating procedures were applied to polymineral, fine-silt samples from 9 core-top and 37 deeper samples from 20 cores representing 19 sites across the Arctic Ocean. Most samples have independent age assignments and other known properties (e.g., % coarse fraction, % carbonate, U-Th isotopes). Thick-source alpha-particle counting indicates that for most regions the contribution of measured unsupported 230Th and 231Pa to calculated dose rates is <ca+5–11%. IR-PSL dating of polymineral fine-silt fractions from core-top and near-core-top samples indicates that three sites (mainly from the western Arctic Ocean) have long-bleach inherited ages of only 3–7 kyr, suggesting potential for accurate PSL and TL dating without an inherited correction when older interglacial samples are selected. Samples from a giant gravity core from the western region (Northwind Ridge) yield acceptable long-bleach TL and IR-PSL ages up to 100 kyr. A sample from the eastern region (near Gakkel Ridge) gives a long-bleach age of ca 60 kyr, agreeing with an independent age assignment. Several samples in the 10–40 kyr 14C range from other sites produce large long-bleach age overestimates, indicating the variable effects of ice-rafting and other depositional and bottom-currentreworking (re-suspension) processes during glacial stages. Short-bleach dating tests provide IR-PSL age estimates for core tops that appear to penetrate the 'reworking veil' of inherited ages, and not only suggest a procedure to greatly reduce long-bleach inherited ages but also have implications for the 14C reservoir correction. This study identifies the most promising regions for future luminescence dating, and suggests that for several regions of the ... |
format |
Dataset |
author |
Berger, Glenn W |
author_facet |
Berger, Glenn W |
author_sort |
Berger, Glenn W |
title |
Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean |
title_short |
Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean |
title_full |
Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean |
title_fullStr |
Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean |
title_full_unstemmed |
Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean |
title_sort |
fine-silt luminescence dating and mineral composition of sediments from the arctic ocean |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.669644 https://doi.org/10.1594/PANGAEA.669644 |
op_coverage |
MEDIAN LATITUDE: 82.296790 * MEDIAN LONGITUDE: 152.638157 * SOUTH-BOUND LATITUDE: 71.070000 * WEST-BOUND LONGITUDE: 9.616800 * NORTH-BOUND LATITUDE: 88.870000 * EAST-BOUND LONGITUDE: -2.556800 * DATE/TIME START: 1987-07-27T00:00:00 * DATE/TIME END: 1991-09-22T00:00:00 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(-20.000,-20.000,83.750,83.750) ENVELOPE(74.000,74.000,87.000,87.000) ENVELOPE(9.616800,-2.556800,88.870000,71.070000) |
geographic |
Arctic Antarctic Arctic Ocean Antarctic Ocean Gakkel Ridge Morris Jesup Rise Amundsen Basin |
geographic_facet |
Arctic Antarctic Arctic Ocean Antarctic Ocean Gakkel Ridge Morris Jesup Rise Amundsen Basin |
genre |
amundsen basin Antarc* Antarctic Antarctic Ocean Arctic Arctic Arctic Ocean Lomonosov Ridge |
genre_facet |
amundsen basin Antarc* Antarctic Antarctic Ocean Arctic Arctic Arctic Ocean Lomonosov Ridge |
op_source |
Supplement to: Berger, Glenn W (2006): Trans-arctic-ocean tests of fine-silt luminescence sediment dating provide a basis for an additional geochronometer for this region. Quaternary Science Reviews, 25(19-20), 2529-2551, https://doi.org/10.1016/j.quascirev.2005.07.024 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.669644 https://doi.org/10.1594/PANGAEA.669644 |
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.669644 https://doi.org/10.1016/j.quascirev.2005.07.024 |
_version_ |
1766366868592918528 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.669644 2023-05-15T13:22:46+02:00 Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean Berger, Glenn W MEDIAN LATITUDE: 82.296790 * MEDIAN LONGITUDE: 152.638157 * SOUTH-BOUND LATITUDE: 71.070000 * WEST-BOUND LONGITUDE: 9.616800 * NORTH-BOUND LATITUDE: 88.870000 * EAST-BOUND LONGITUDE: -2.556800 * DATE/TIME START: 1987-07-27T00:00:00 * DATE/TIME END: 1991-09-22T00:00:00 2007-11-27 application/zip, 18 datasets https://doi.pangaea.de/10.1594/PANGAEA.669644 https://doi.org/10.1594/PANGAEA.669644 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.669644 https://doi.org/10.1594/PANGAEA.669644 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Berger, Glenn W (2006): Trans-arctic-ocean tests of fine-silt luminescence sediment dating provide a basis for an additional geochronometer for this region. Quaternary Science Reviews, 25(19-20), 2529-2551, https://doi.org/10.1016/j.quascirev.2005.07.024 88-BC22 88-GGC23 89-BC11 92-BC17 94-BC16 94-BC17 94-BC19 94-BC20 94-BC28 Amundsen Basin Antarctic Ocean Arctic Ocean ARK-IV/3 ARK-VIII/3 BC Box corer Gakkel Ridge GGC Giant box corer Giant gravity corer Giant piston corer GIK21524-2 PS11/364-2 GIK21533-3 PS11/412 GKG GPC Gravity corer (Kiel type) KAL Kasten corer Lomonosov Ridge Morris Jesup Rise Polarstern PS11 PS1524-2 PS1533-3 PS19/157 PS19/160 PS19/165 PS19/175 PS19/186 PS19/206 PS19/218 PS19/222 PS19/228 PS19 ARCTIC91 PS2163-2 PS2166-2 PS2170-1 PS2177-1 Dataset 2007 ftpangaea https://doi.org/10.1594/PANGAEA.669644 https://doi.org/10.1016/j.quascirev.2005.07.024 2023-01-20T07:31:06Z New geochronometers are needed for sediments of the Arctic Ocean spanning at least the last half million years, largely because oxygen-isotope stratigraphy is relatively ineffective in this ocean, and because other dating techniques require significant assumptions about sedimentation rates. Multi-aliquot luminescence sediment-dating procedures were applied to polymineral, fine-silt samples from 9 core-top and 37 deeper samples from 20 cores representing 19 sites across the Arctic Ocean. Most samples have independent age assignments and other known properties (e.g., % coarse fraction, % carbonate, U-Th isotopes). Thick-source alpha-particle counting indicates that for most regions the contribution of measured unsupported 230Th and 231Pa to calculated dose rates is <ca+5–11%. IR-PSL dating of polymineral fine-silt fractions from core-top and near-core-top samples indicates that three sites (mainly from the western Arctic Ocean) have long-bleach inherited ages of only 3–7 kyr, suggesting potential for accurate PSL and TL dating without an inherited correction when older interglacial samples are selected. Samples from a giant gravity core from the western region (Northwind Ridge) yield acceptable long-bleach TL and IR-PSL ages up to 100 kyr. A sample from the eastern region (near Gakkel Ridge) gives a long-bleach age of ca 60 kyr, agreeing with an independent age assignment. Several samples in the 10–40 kyr 14C range from other sites produce large long-bleach age overestimates, indicating the variable effects of ice-rafting and other depositional and bottom-currentreworking (re-suspension) processes during glacial stages. Short-bleach dating tests provide IR-PSL age estimates for core tops that appear to penetrate the 'reworking veil' of inherited ages, and not only suggest a procedure to greatly reduce long-bleach inherited ages but also have implications for the 14C reservoir correction. This study identifies the most promising regions for future luminescence dating, and suggests that for several regions of the ... Dataset amundsen basin Antarc* Antarctic Antarctic Ocean Arctic Arctic Arctic Ocean Lomonosov Ridge PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic Arctic Ocean Antarctic Ocean Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Morris Jesup Rise ENVELOPE(-20.000,-20.000,83.750,83.750) Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) ENVELOPE(9.616800,-2.556800,88.870000,71.070000) |