A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic
This work represents the first palaeomagnetic study carried out on the sedimentary record of lake Levinson-Lessing, which is the deepest lake in northern Central Siberia. Palaeomagnetic analyses were carried out on 730 discrete samples from the upper 38 m of the 46 m-long core Co1401, which was reco...
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fttriple:oai:gotriple.eu:10670/1.mp69on 2023-05-15T14:59:51+02:00 A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic Scheidt, Stephanie Lenz, Matthias Egli, Ramon Brill, Dominik Klug, Martin Fabian, Karl Lenz, Marlene M. Gromig, Raphael Rethemeyer, Janet Wagner, Bernd Federov, Grigory Melles, Martin https://doi.org/10.5194/gchron-2021-12 https://archimer.ifremer.fr/doc/00697/80946/84915.pdf https://archimer.ifremer.fr/doc/00697/80946/ en eng Copernicus GmbH doi:10.5194/gchron-2021-12 10670/1.mp69on https://archimer.ifremer.fr/doc/00697/80946/84915.pdf https://archimer.ifremer.fr/doc/00697/80946/ other Archimer, archive institutionnelle de l'Ifremer Geochronology (2628-3719) (Copernicus GmbH) In Press geo info Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.5194/gchron-2021-12 2023-01-22T17:05:22Z This work represents the first palaeomagnetic study carried out on the sedimentary record of lake Levinson-Lessing, which is the deepest lake in northern Central Siberia. Palaeomagnetic analyses were carried out on 730 discrete samples from the upper 38 m of the 46 m-long core Co1401, which was recovered from the central part of the lake. Alternating field demagnetisation experiments were carried out to obtain the characteristic remanent magnetisation. The relative palaeointensity is determined using the magnetic susceptibility, the anhysteretic remanent magnetization and the isothermal remanent magnetization for normalization of the partial natural remanent magnetization. The chronology of Co1401 derives from accelerated mass spectrometer radiocarbon ages, optically stimulated luminescence dating, and correlation of the relative palaeointensity of 642 discrete samples with the GLOPIS-75 reference curve. This study focuses on the part >10 ka but although includes preliminary results for the upper part of the core. The record includes the geomagnetic excursions Laschamps and Mono Lake, and resolves sufficient geomagnetic features to establish a chronology that continuously covers ~62 ka. The results reveal continuous sedimentation and high sedimentation rate between 45 and 95 cm ka−1. High lock-in depths are suggested from the low variability of the magnetic record compared to data sets of reference records with lower sedimentation rate. Although the horizontal component of the characteristic remanent magnetization can only be used with caution because Co1401 was cored without core segment overlap, the magnetic record of Co1401 is the only high-resolution record of relative palaeointensity and palaeosecular variations from the Arctic tangent cylinder going back to ~62 ka. Text Arctic Magnetic susceptibility Taymyr Taymyr Peninsula Siberia Unknown Arctic Taymyr ENVELOPE(89.987,89.987,68.219,68.219) |
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language |
English |
topic |
geo info |
spellingShingle |
geo info Scheidt, Stephanie Lenz, Matthias Egli, Ramon Brill, Dominik Klug, Martin Fabian, Karl Lenz, Marlene M. Gromig, Raphael Rethemeyer, Janet Wagner, Bernd Federov, Grigory Melles, Martin A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic |
topic_facet |
geo info |
description |
This work represents the first palaeomagnetic study carried out on the sedimentary record of lake Levinson-Lessing, which is the deepest lake in northern Central Siberia. Palaeomagnetic analyses were carried out on 730 discrete samples from the upper 38 m of the 46 m-long core Co1401, which was recovered from the central part of the lake. Alternating field demagnetisation experiments were carried out to obtain the characteristic remanent magnetisation. The relative palaeointensity is determined using the magnetic susceptibility, the anhysteretic remanent magnetization and the isothermal remanent magnetization for normalization of the partial natural remanent magnetization. The chronology of Co1401 derives from accelerated mass spectrometer radiocarbon ages, optically stimulated luminescence dating, and correlation of the relative palaeointensity of 642 discrete samples with the GLOPIS-75 reference curve. This study focuses on the part >10 ka but although includes preliminary results for the upper part of the core. The record includes the geomagnetic excursions Laschamps and Mono Lake, and resolves sufficient geomagnetic features to establish a chronology that continuously covers ~62 ka. The results reveal continuous sedimentation and high sedimentation rate between 45 and 95 cm ka−1. High lock-in depths are suggested from the low variability of the magnetic record compared to data sets of reference records with lower sedimentation rate. Although the horizontal component of the characteristic remanent magnetization can only be used with caution because Co1401 was cored without core segment overlap, the magnetic record of Co1401 is the only high-resolution record of relative palaeointensity and palaeosecular variations from the Arctic tangent cylinder going back to ~62 ka. |
format |
Text |
author |
Scheidt, Stephanie Lenz, Matthias Egli, Ramon Brill, Dominik Klug, Martin Fabian, Karl Lenz, Marlene M. Gromig, Raphael Rethemeyer, Janet Wagner, Bernd Federov, Grigory Melles, Martin |
author_facet |
Scheidt, Stephanie Lenz, Matthias Egli, Ramon Brill, Dominik Klug, Martin Fabian, Karl Lenz, Marlene M. Gromig, Raphael Rethemeyer, Janet Wagner, Bernd Federov, Grigory Melles, Martin |
author_sort |
Scheidt, Stephanie |
title |
A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic |
title_short |
A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic |
title_full |
A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic |
title_fullStr |
A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic |
title_full_unstemmed |
A 62-ka geomagnetic palaeointensity record from the Taymyr Peninsula, Russian Arctic |
title_sort |
62-ka geomagnetic palaeointensity record from the taymyr peninsula, russian arctic |
publisher |
Copernicus GmbH |
url |
https://doi.org/10.5194/gchron-2021-12 https://archimer.ifremer.fr/doc/00697/80946/84915.pdf https://archimer.ifremer.fr/doc/00697/80946/ |
long_lat |
ENVELOPE(89.987,89.987,68.219,68.219) |
geographic |
Arctic Taymyr |
geographic_facet |
Arctic Taymyr |
genre |
Arctic Magnetic susceptibility Taymyr Taymyr Peninsula Siberia |
genre_facet |
Arctic Magnetic susceptibility Taymyr Taymyr Peninsula Siberia |
op_source |
Archimer, archive institutionnelle de l'Ifremer Geochronology (2628-3719) (Copernicus GmbH) In Press |
op_relation |
doi:10.5194/gchron-2021-12 10670/1.mp69on https://archimer.ifremer.fr/doc/00697/80946/84915.pdf https://archimer.ifremer.fr/doc/00697/80946/ |
op_rights |
other |
op_doi |
https://doi.org/10.5194/gchron-2021-12 |
_version_ |
1766331968589398016 |