Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses
Sediments deposited during glacial-interglacial cycles through the Early to Mid-Pleistocene in the North Sea are chronologically poorly constrained. To contribute to the chronology of these units, amino acid racemization (AAR) and strontium (Sr) isotope analyses have been performed on samples from f...
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Online Access: | http://hdl.handle.net/10852/100117 https://doi.org/10.1016/j.quageo.2022.101336 |
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ftoslouniv:oai:www.duo.uio.no:10852/100117 2023-05-15T16:41:33+02:00 Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses ENEngelskEnglishChronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses Chauhan, Teena Sejrup, Hans Petter Hjelstuen, Berit Oline Blihovde Kaufman, Darrell S. Baig, Irfan Reinardy, Benedict T.I. 2022-09-09T08:37:23Z http://hdl.handle.net/10852/100117 https://doi.org/10.1016/j.quageo.2022.101336 EN eng Chauhan, Teena Sejrup, Hans Petter Hjelstuen, Berit Oline Blihovde Kaufman, Darrell S. Baig, Irfan Reinardy, Benedict T.I. . Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses. Quaternary Geochronology. 2022, 71 http://hdl.handle.net/10852/100117 2050111 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Quaternary Geochronology&rft.volume=71&rft.spage=&rft.date=2022 Quaternary Geochronology 71 0 https://doi.org/10.1016/j.quageo.2022.101336 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 1871-1014 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2022 ftoslouniv https://doi.org/10.1016/j.quageo.2022.101336 2023-02-22T23:36:45Z Sediments deposited during glacial-interglacial cycles through the Early to Mid-Pleistocene in the North Sea are chronologically poorly constrained. To contribute to the chronology of these units, amino acid racemization (AAR) and strontium (Sr) isotope analyses have been performed on samples from four shallow borings and one oil well along a transect in the northern North Sea. D/L Asp (aspartic acid) values obtained through reverse-phase liquid chromatography in the benthic foraminiferal species Elphidium excavatum is focused on because of consistent results and a good stratigraphic distribution of this benthic species. For the Early Pleistocene, an age model for the well 16/1–8, from the central part of the northern North Sea based on Sr ages allows for dating of the prograding wedges filling the pre-Quaternary central basin. A regional calibration curve for the racemization of Asp in Elphidium excavatum is developed using published ages of radiocarbon-dated samples and samples associated with the previously identified Bruhnes/Matuyama (B/M) paleomagnetic boundary and a Sr age from this study. Based on all the available geochronological evidence, samples were assigned to marine oxygen isotope stages (MIS) with uncertainties on the order of 10–70 ka. Sr ages suggest a hiatus of <2 million years (Ma) possibly due to non-deposition or low sedimentation between the Utsira Formation (Pliocene) and the Early Pleistocene. An increase in sedimentation rates around 1.5 ± 0.07 Ma (∼MIS 51) may partly be due to sediment supply from rivers from the south-east and partly due to the extension of ice sheet around 1.36 ± 0.07 Ma from the Norwegian coast to the central North Sea. A possible basin-wide glaciation occurred around 1.1 Ma (∼ MIS 32) (upper regional unconformity/top of unit Q4 in this study), resulting in erosion and regional unconformity. Two interglacials in the Norwegian Channel have been dated: the Radøy Interglacial to 1.07 ± 0.01 Ma (possibly MIS 31, the ‘super interglacial’), and the Norwegian Trench ... Article in Journal/Newspaper Ice Sheet Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Utsira ENVELOPE(21.477,21.477,77.149,77.149) Quaternary Geochronology 71 101336 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Sediments deposited during glacial-interglacial cycles through the Early to Mid-Pleistocene in the North Sea are chronologically poorly constrained. To contribute to the chronology of these units, amino acid racemization (AAR) and strontium (Sr) isotope analyses have been performed on samples from four shallow borings and one oil well along a transect in the northern North Sea. D/L Asp (aspartic acid) values obtained through reverse-phase liquid chromatography in the benthic foraminiferal species Elphidium excavatum is focused on because of consistent results and a good stratigraphic distribution of this benthic species. For the Early Pleistocene, an age model for the well 16/1–8, from the central part of the northern North Sea based on Sr ages allows for dating of the prograding wedges filling the pre-Quaternary central basin. A regional calibration curve for the racemization of Asp in Elphidium excavatum is developed using published ages of radiocarbon-dated samples and samples associated with the previously identified Bruhnes/Matuyama (B/M) paleomagnetic boundary and a Sr age from this study. Based on all the available geochronological evidence, samples were assigned to marine oxygen isotope stages (MIS) with uncertainties on the order of 10–70 ka. Sr ages suggest a hiatus of <2 million years (Ma) possibly due to non-deposition or low sedimentation between the Utsira Formation (Pliocene) and the Early Pleistocene. An increase in sedimentation rates around 1.5 ± 0.07 Ma (∼MIS 51) may partly be due to sediment supply from rivers from the south-east and partly due to the extension of ice sheet around 1.36 ± 0.07 Ma from the Norwegian coast to the central North Sea. A possible basin-wide glaciation occurred around 1.1 Ma (∼ MIS 32) (upper regional unconformity/top of unit Q4 in this study), resulting in erosion and regional unconformity. Two interglacials in the Norwegian Channel have been dated: the Radøy Interglacial to 1.07 ± 0.01 Ma (possibly MIS 31, the ‘super interglacial’), and the Norwegian Trench ... |
format |
Article in Journal/Newspaper |
author |
Chauhan, Teena Sejrup, Hans Petter Hjelstuen, Berit Oline Blihovde Kaufman, Darrell S. Baig, Irfan Reinardy, Benedict T.I. |
spellingShingle |
Chauhan, Teena Sejrup, Hans Petter Hjelstuen, Berit Oline Blihovde Kaufman, Darrell S. Baig, Irfan Reinardy, Benedict T.I. Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses |
author_facet |
Chauhan, Teena Sejrup, Hans Petter Hjelstuen, Berit Oline Blihovde Kaufman, Darrell S. Baig, Irfan Reinardy, Benedict T.I. |
author_sort |
Chauhan, Teena |
title |
Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses |
title_short |
Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses |
title_full |
Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses |
title_fullStr |
Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses |
title_full_unstemmed |
Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses |
title_sort |
chronology of early to mid-pleistocene sediments in the northern north sea: new evidence from amino acid and strontium isotope analyses |
publishDate |
2022 |
url |
http://hdl.handle.net/10852/100117 https://doi.org/10.1016/j.quageo.2022.101336 |
long_lat |
ENVELOPE(21.477,21.477,77.149,77.149) |
geographic |
Utsira |
geographic_facet |
Utsira |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
1871-1014 |
op_relation |
Chauhan, Teena Sejrup, Hans Petter Hjelstuen, Berit Oline Blihovde Kaufman, Darrell S. Baig, Irfan Reinardy, Benedict T.I. . Chronology of Early to Mid-Pleistocene sediments in the northern North Sea: New evidence from amino acid and strontium isotope analyses. Quaternary Geochronology. 2022, 71 http://hdl.handle.net/10852/100117 2050111 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Quaternary Geochronology&rft.volume=71&rft.spage=&rft.date=2022 Quaternary Geochronology 71 0 https://doi.org/10.1016/j.quageo.2022.101336 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.quageo.2022.101336 |
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Quaternary Geochronology |
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71 |
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101336 |
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